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MAX1565ETJ+T

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MAX1565ETJ+T

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Part Number MAX1565ETJ+T
Manufacturer Maxim Integrated
Description IC DGTL CAM PWR-SUP 5CH 32TQFN
Datasheet MAX1565ETJ+T Datasheet
Package 32-WFQFN Exposed Pad
In Stock 15,226 piece(s)
Unit Price $ 2.8886 *
Lead Time Can Ship Immediately
Estimated Delivery Time Dec 4 - Dec 9 (Choose Expedited Shipping)
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Part Number # MAX1565ETJ+T (PMIC - Voltage Regulators - Special Purpose) is manufactured by Maxim Integrated and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

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MAX1565ETJ+T Specifications

ManufacturerMaxim Integrated
CategoryIntegrated Circuits (ICs) - PMIC - Voltage Regulators - Special Purpose
Datasheet MAX1565ETJ+TDatasheet
Package32-WFQFN Exposed Pad
Series-
ApplicationsController/Converter, Digital Cameras
Voltage - Input0.7 V ~ 5.5 V
Number of Outputs5
Voltage - Output3.3V, 1.25 V ~ 5.5 V
Operating Temperature-40°C ~ 85°C
Mounting TypeSurface Mount
Package / Case32-WFQFN Exposed Pad
Supplier Device Package32-TQFN-EP (5x5)

MAX1565ETJ+T Datasheet

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General Description The MAX1565 provides a complete power-supply solution for digital still and video cameras through the integration of ultra-high-efficiency step-up/step-down DC-to-DC con- verters along with three auxiliary step-up controllers. The MAX1565 is targeted for applications that use either 2 or 3 alkaline or NiMH batteries as well as those using a single lithium-ion (Li+) battery. The step-up DC-to-DC converter accepts inputs from 0.7V to 5.5V and regulates a resistor-adjustable output from 2.7V to 5.5V. It uses internal MOSFETs to achieve 95% efficiency. Adjustable operating frequency facili- tates design for optimum size, cost, and efficiency. The step-down DC-to-DC converter can produce output voltages as low as 1.25V and also utilizes internal MOSFETs to achieve 95% efficiency. An internal soft- start ramp minimizes surge current from the battery. The converter can operate from the step-up output pro- viding buck-boost capability with up to 90% compound efficiency, or it can run directly from the battery if buck- boost operation is not needed. The MAX1565 features auxiliary step-up controllers that power CCD, LCD, motor actuator, and backlight cir- cuits. The device also features low-cost expandability by supplying power, an oscillator signal, and a refer- ence to the MAX1801 SOT23 slave controller that sup- ports step-up, SEPIC, and flyback configurations. The MAX1565 is available in a space-saving 32-pin thin QFN package. Applications Digital Still Cameras Digital Video Cameras PDAs Features  Step-Up DC-to-DC Converter 95% Efficient 3.3V (Fixed) or 2.7V to 5.5V (Adjustable) Output Voltage  Step-Down DC-to-DC Converter Operate from Battery for 95% Efficient Buck Combine with Step-Up for 90% Efficient Buck- Boost Adjustable Output Down to 1.25V  Three Auxiliary PWM Controllers  Up to 1MHz Operating Frequency  1µA Shutdown Mode  Internal Soft-Start Control  Overload Protection  Compact 32-Pin, 5mm x 5mm Thin QFN Package M A X 1 5 6 5 Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply ________________________________________________________________ Maxim Integrated Products 1 MAX1565 5mm x 5mm THIN QFN TOP VIEW 32 28293031 252627 C O M P 2 G N D D L1 D L2 FB 2 D L3 O U TS U B FB 3 10 13 1514 1611 129 O N 1 O N 3 O N 2 R EF O N S U C O M P S U FB S U FB S EL S U 17 18 19 20 21 22 23 SDOK 24 COMP3 OUTSUA LXSU PGNDB OSC FBSEL1 FBSELSD 2 3 4 5 6 7 8FBSD COMPSD ONSD INSD LXSD PGNDA FB1 1COMP1 Pin Configuration Ordering Information MAIN +3.3V CORE +1.5V MOTOR +5V CCD +15V/-7.5V LCD, LED +15V STEP-UP STEP-DOWN AUX1 AUX2 AUX30N3 ON2 ON1 ONSD ONSU MAX1565 INPUT +0.7V TO +5.5V ON/OFF CONTROLS Typical Operating Circuit 19-2712; Rev 0; 1/03 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALU ATION KIT AVAIL ABLE PART TEMP RANGE PIN-PACKAGE MAX1565ETJ -40°C to +85°C 32 Thin QFN

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M A X 1 5 6 5 Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (VOUTSU = 3.3V, TA = 0°C to +85°C, unless otherwise noted.) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. OUTSU_, INSD, SDOK, ON_, FB_, FBSEL_ to GND....................................................-0.3V to +6V PGND to GND .......................................................-0.3V to +0.3V DL_ to PGND...........................................-0.3V to OUTSU + 0.3V LXSU Current (Note 1) ..........................................................3.6A LXSD Current (Note 1) ........................................................2.25A REF, OSC, COMP_ to GND.....................-0.3V to OUTSU + 0.3V Continuous Power Dissipation (TA =+70°C) 32-Pin Thin QFN (derate 22mW/°C above +70°C).............................................................1700mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Note 1: LXSU has internal clamp diodes to OUTSU and PGND, and LXSD has internal clamp diodes to INSD and PGND. Applications that forward bias these diodes should take care not to exceed the devices power dissipation limits. PARAMETER CONDITIONS MIN TYP MAX UNITS GENERAL Input Voltage Range (Note 2) 0.7 5.5 V Minimum Startup Voltage ILOAD < 1mA, TA = +25°C, startup voltage tempco is -2300ppm/°C (typ) (Note 3) 0.9 1.1 V Overload Protection Fault Interval 100,000 OSC cycles Thermal Shutdown 160 °C Thermal-Shutdown Hysteresis 20 °C Shutdown Supply Current into OUTSU ONSU = ONSD = ON1 = ON2 = ON3 = 0; OUTSU = 3.6V 0.1 5 µA Step-Up DC-to-DC Supply Current into OUTSU ONSU = 3.35V, FBSU = 1.5V (does not include switching losses) 290 400 µA Step-Up Plus 1 AUX Supply Current into OUTSU ONSU = ON_ = 3.35V, FBSU = 1.5V, FB_ = 1.5V (does not include switching losses) 420 600 µA Step-Up Plus Step-Down Supply Current into OUTSU ONSU = ONSD = 3.35V, FBSU = 1.5V, FBSD = 1.5V (does not include switching losses) 470 650 µA Reference Output Voltage IREF = 20µA 1.23 1.25 1.27 V Reference Load Regulation 10µA < IREF < 200µA 4.5 10 mV Reference Line Regulation 2.7 < OUTSU < 5.5V 1.3 5 mV OSC Discharge Trip Level Rising edge 1.225 1.25 1.275 V OSC Discharge Resistance OSC = 1.5V, IOSC = 3mA 52 80 Ω OSC Discharge Pulse Width 300 ns OSC Frequency ROSC = 40kΩ, COSC = 100pF 400 kHz STEP-UP DC-TO-DC CONVERTER Step-Up Startup-to-Normal Operating Threshold Rising or falling edge (Note 4) 2.30 2.5 2.60 V Step-Up Startup-to-Normal Operating Threshold Hysteresis 80 mV

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M A X 1 5 6 5 Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VOUTSU = 3.3V, TA = 0°C to +85°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS Step-Up Voltage Adjust Range 2.7 5.5 V FBSU Regulation Voltage 1.231 1.25 1.269 V OUTSU Regulation Voltage FBSELSU = GND 3.296 3.35 3.404 V FBSU to COMPSU Transconductance FBSU = COMPSU 80 135 185 µS FBSU Input Leakage Current FBSU = 1.25V -100 +1 +100 nA Idle-Mode™ Trip Level (Note 6) 150 200 265 mA Current-Sense Amplifier Transresistance 0.3 V/A Step-Up Maximum Duty Cycle FBSU = 1V 80 85 90 % OUTSU Leakage Current VLX = 0V, OUTSU = 5.5V 0.01 20 µA LXSU Leakage Current VLXSU = VOUT = 5.5V 0.01 20 µA N-channel 95 150 Switch On-Resistance P-channel 150 250 mΩ N-Channel Current limit 1.6 2 2.4 A P-Channel Turn-Off Current 20 mA Startup Current Limit OUTSU = 1.8V (Note 5) 800 mA Startup tOFF OUTSU = 1.8V 700 ns Startup Frequency OUTSU = 1.8V 200 kHz STEP-DOWN DC-TO-DC CONVERTER FBSD Regulation Voltage 1.231 1.25 1.269 V OUTSD Regulation Voltage FBSELSD = GND 1.48 1.5 1.52 V FBSD to COMPSD Transconductance FBSD = COMPSD 80 135 185 µS FBSD Input Leakage Current FBSD = 1.25V -100 +1 +100 nA Idle-Mode Trip Level (Note 6) 110 160 190 mA Current-Sense Amplifier Transresistance 0.60 V/A VLXSD = 5.5V, OUTSU = 5.5V 0.01 20 LXSD Leakage Current VLXSD = 0V, OUTSU = 5.5V 0.01 20 µA N-channel 95 150 Switch On-Resistance P-channel 150 250 mΩ P-Channel Current Limit 0.7 0.79 1.0 A N-Channel Turn-Off Current 20 mA Soft-Start Interval 4096 OSC cycles SDOK Output Low Voltage FBSD = 0.4V; 0.1mA into SDOK pin 0.002 0.1 V SDOK Operating Voltage Range 1.0 5.5 V Idle Mode is a trademark of Maxim Integrated Products, Inc.

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M A X 1 5 6 5 Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (continued) (VOUTSU = 3.3V, TA = 0°C to +85°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS AUXILIARY DC-TO-DC CONTROLLERS (AUX 1, 2, AND 3) Maximum Duty Cycle FB_ = 1V 80 85 90 % FB_ Regulation Voltage FB_ = COMP_ 1.231 1.25 1.269 V FB_ to COMP_ Transconductance FB_ = COMP_ 80 135 185 µS FB_ Input Leakage Current FB_ = 1.25V -100 +1 +100 nA AUX1 Output Regulation Voltage FBSEL1 = GND, FB1 connected directly to AUX1 output 4.93 5 5.07 V Output high 3 10 DL_ Driver Resistance Output low 2 5 Ω DL_ Drive Current Sourcing or sinking 0.5 A Soft-Start Interval 4096 OSC cycles LOGIC INPUTS (ON_ , FBSEL_) 1.1V < OUTSU < 1.8V (ONSU only) 0.2 Input Low Level 1.8V < OUTSU < 5.5V 0.4 V 1.1V < OUTSU < 1.8V (ONSU only) VOUTSU - 0.2 Input High Level 1.8V < OUTSU < 5.5V 1.6 V FBSEL = 3.6V, OUTSU = 3.6V -100 0 +100 FBSEL_ Input Leakage Current FBSEL = GND, OUTSU = 3.6V -100 0 +100 nA ON_ Impedance to GND ON_ = 3.35V 330 kΩ ELECTRICAL CHARACTERISTICS (VOUTSU = 3.3V, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS GENERAL Input Voltage Range (Note 2) 0.7 5.5 V Minimum Startup Voltage ILOAD < 1mA, TA = +25°C, startup voltage tempco is -2300ppm/°C (typ) (Note 3) 1.1 V Shutdown Supply Current into OUTSU ONSU = ONSD = ON1 = ON2 = ON3 = 0 OUTSU = 3.6V 5 µA Step-Up DC-to-DC Supply Current into OUTSU ONSU = 3.35V, FBSU = 1.5V (does not include switching losses) 400 µA Step-Up Plus 1 AUX Supply Current into OUTSU ONSU = ON_ = 3.35V, FBSU = 1.5V, FB_ = 1.5V (does not include switching losses) 600 µA Step-Up Plus Step-Down Supply Current into OUTSU ONSU = ONSD = 3.35V, FBSU = 1.5V, FBSD = 1.5V (does not include switching losses) 650 µA Reference Output Voltage IREF = 20µA 1.23 1.27 V Reference Load Regulation 10µA < IREF < 200µA 10 mV

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M A X 1 5 6 5 Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply _______________________________________________________________________________________ 5 ELECTRICAL CHARACTERISTICS (continued) (VOUTSU = 3.3V, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS Reference Line Regulation 2.7V < OUTSU < 5.5V 5 mV OSC Discharge Trip Level Rising edge 1.225 1.275 V OSC Discharge Resistance OSC = 1.5V, IOSC = 3mA 80 Ω STEP-UP DC-TO-DC CONVERTER Step-Up Startup-to-Normal Operating Threshold Rising or falling edge (Note 4) 2.30 2.60 V Step-Up Voltage Adjust Range 2.7 5.5 V FBSU Regulation Voltage 1.225 1.275 V OUTSU Regulation Voltage FBSELSU = GND 3.283 3.417 V FBSU to COMPSU Transconductance FBSU = COMPSU 80 185 µS FBSU Input Leakage Current FBSU = 1.25V -100 +100 nA Idle-Mode Trip Level (Note 6) 150 275 mA Step-Up Maximum Duty Cycle FBSU =1V 80 90 % OUTSU Leakage Current VLX = 0V, OUTSU = 5.5V 20 µA LXSU Leakage Current VLXSU = VOUT = 5.5V 20 µA N-channel 150 Switch On-Resistance P-channel 250 mΩ N-Channel Current limit 1.6 2.4 A STEP-DOWN DC-TO-DC CONVERTER FBSD Regulation Voltage 1.225 1.275 V OUTSD Regulation Voltage FBSELSD = GND 1.47 1.53 V FBSD to COMPSD Transconductance FBSD = COMPSD 80 185 µS FBSD Input Leakage Current FBSD = 1.25V -100 +100 nA Idle-Mode Trip Level (Note 6) 110 195 mA VLXSD = 5.5V, OUTSU = 5.5V 20 LXSD Leakage Current VLXSD = 0V, OUTSU = 5.5V 20 µA N-channel 150 Switch On-Resistance P-channel 250 mΩ P-Channel Current Limit 0.7 1.0 A SDOK Output Low Voltage FBSD = 0.4V; 0.1mA into SDOK pin 0.1 V SDOK Operating Voltage Range 1 5.5 V AUXILIARY DC-TO-DC CONTROLLERS (AUX 1, 2, AND 3) Maximum Duty Cycle FB_ = 1V 80 90 % FB_ Regulation Voltage FB_ = COMP_ 1.225 1.275 V

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M A X 1 5 6 5 Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply 6 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (continued) (VOUTSU = 3.3V, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS FB_ to COMP_ Transconductance FB_ = COMP_ 80 185 µS FB_ Input Leakage Current FB_ = 1.25V -100 +100 nA AUX1 Output Regulation Voltage FBSEL1 = GND, FB1 connected directly to AUX1 output 4.90 5.10 V Output high 10 DL_ Driver Resistance Output low 5 Ω LOGIC INPUTS (ON_, FBSEL_) 1.1V < OUTSU < 1.8V (ONSU only) 0.2 Input Low Level 1.8V < OUTSU < 5.5V 0.4 V 1.1V < OUTSU < 1.8V (ONSU only) VOUTSU -0.2 Input High Level 1.8V < OUTSU < 5.5V 1.6 V FBSEL = 3.6V, OUTSU = 3.6V -100 +100 FBSEL_ Input Leakage Current FBSEL = GND, OUTSU = 3.6V -100 +100 nA Note 2: The IC is powered from the OUTSU output. Note 3: Since the part is powered from OUTSU, a Schottky rectifier, connected from the input battery to OUTSU, is required for low-voltage startup. Note 4: The step-up regulator operates in startup mode until this voltage is reached. Do not apply full load current during startup. Note 5: The step-up current limit in startup refers to the LXSU switch current limit, not an output current limit. Note 6: The idle-mode current threshold is the transition point between fixed-frequency PWM operation and idle-mode operation (where switching rate varies with load). The spec is given in terms of inductor current. In terms of output current, the idle- mode transition varies with input/output voltage ratio and inductor value. For the step-up, the transition output current is approximately 1/3 the inductor current when stepping from 2V to 3.3V. For the step-down, the transition current in terms of output current is approximately 3/4 the inductor current when stepping down from 3.3V to 1.8V. STEP-UP EFFICIENCY vs. LOAD CURRENT (5V OUTPUT) M A X 1 5 6 5 t o c0 1 LOAD CURRENT (mA) EF FI C IE N C Y ( % ) 10010 10 20 30 40 50 60 70 80 90 100 0 1 1000 VIN = 4V VIN = 3.6V VIN = 3V VIN = 2V VIN = 1.5V VOUT = 5V STEP-UP EFFICIENCY vs. LOAD CURRENT (3.3V OUTPUT) M A X 1 5 6 5 t o c0 2 LOAD CURRENT (mA) EF FI C IE N C Y ( % ) 10010 10 20 30 40 50 60 70 80 90 100 0 1 1000 VIN = 3.6V VIN = 3V VIN = 2V VIN = 1.5V VOUT = 3.3V STEP-DOWN EFFICIENCY vs. LOAD CURRENT M A X 1 5 6 5 t o c0 3 LOAD CURRENT (mA) EF FI C IE N C Y ( % ) 10010 10 20 30 40 50 60 70 80 90 100 0 1 1000 VIN = 4.2V VIN = 3.6V VIN = 3V INSD CONNECTED TO BATTERY VOUT = 1.5V DOES NOT INCLUDE CURRENT USED BY THE STEP-UP TO POWER THE IC Typical Operating Characteristics (Circuit of Figure 1, TA = +25°C, unless otherwise noted.)

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M A X 1 5 6 5 Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply _______________________________________________________________________________________ 7 BUCK-BOOST EFFICIENCY vs. LOAD CURRENT (1.5V OUTPUT, VOUTSU = 3.3V) M A X 1 5 6 5 t o c0 4 LOAD CURRENT (mA) EF FI C IE N C Y ( % ) 10010 10 20 30 40 50 60 70 80 90 100 0 1 1000 VIN = 3V VIN = 2V VIN = 1.5V VOUTSD = 1.5V VOUTSU = 3.3V BUCK-BOOST EFFICIENCY vs. LOAD CURRENT (3.3V OUTPUT, VOUTSU = 5V) M A X 1 5 6 5 t o c0 5 LOAD CURRENT (mA) EF FI C IE N C Y ( % ) 10010 10 20 30 40 50 60 70 80 90 100 0 1 1000 VIN = 4.2V VIN = 3.6V VIN = 3V VIN = 2V VIN = 1.5V VOUTSD = 3.3V VOUTSU = 5V BUCK-BOOST EFFICIENCY vs. INPUT VOLTAGE (1.5V OUTPUT, VOUTSU = 3.3V) M A X 1 5 6 5 t o c0 6 INPUT VOLTAGE (V) EF FI C IE N C Y ( % ) 3.53.02.52.0 10 20 30 40 50 60 70 80 90 100 0 1.5 4.0 IOUTSD = 250mA IOUTSD = 500mA IOUTSD = 100mA VOUTSD = 1.5V VOUTSU = 3.3V BUCK-BOOST EFFICIENCY vs. INPUT VOLTAGE (3.3V OUTPUT, VOUTSU = 5V) M A X 1 5 6 5 t o c0 7 INPUT VOLTAGE (V) EF FI C IE N C Y ( % ) 4.03.53.02.52.0 10 20 30 40 50 60 70 80 90 100 0 1.5 4.5 IOUTSD = 250mA IOUTSD = 500mA IOUTSD = 100mA VOUTSD = 3.3V VOUTSU = 5V BOOST AND BUCK-BOOST COMBINED EFFICIENCY vs. INPUT VOLTAGE M A X 1 5 6 5 t o c0 8 INPUT VOLTAGE (V) EF FI C IE N C Y ( % ) 3.02.52.01.5 60 70 80 90 100 50 1.0 3.5 VOUTSU = 3.3V, 200mA VOUTSD = 1.5V, 200mA EFF% = [(VSUISU) + (VSDISD)]/(VINIIN) AUX_ EFFICIENCY vs. LOAD CURRENT (5V OUTPUT) M A X 1 5 6 5 t o c0 9 LOAD CURRENT (mA) EF FI C IE N C Y ( % ) 10010 10 20 30 40 50 60 70 80 90 100 0 1 1000 VIN = 3.6V VIN = 3V VIN = 2V VIN = 1.5V VOUTAUX_ = 5V NO-LOAD INPUT CURRENT vs. INPUT VOLTAGE (SWITCHING) M A X 1 5 6 5 t o c1 0 INPUT VOLTAGE (V) IN P U T C U R R EN T (m A ) 432 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 1 5 VOUTSD = 1.5V VOUTSU = 5V BUCK-BOOST (STEP-UP AND STEP DOWN) STEP-UP MINIMUM STARTUP VOLTAGE vs. LOAD CURRENT (OUTSU) M A X 1 5 6 5 t o c1 1 LOAD CURRENT (mA) M IN IM U M S TA R TU P V O LT A G E (V ) 900600300 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 0 1200 *SCHOTTKY DIODE CONNECTED FROM IN TO OUTSU WITH SCHOTTKY* WITHOUT SCHOTTKY* Typical Operating Characteristics (continued) (Circuit of Figure 1, TA = +25°C, unless otherwise noted.)

Page 9

M A X 1 5 6 5 Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply 8 _______________________________________________________________________________________ Typical Operating Characteristics (continued) (Circuit of Figure 1, TA = +25°C, unless otherwise noted.) REFERENCE VOLTAGE vs. TEMPERATURE M A X 1 5 6 5 t o c1 2 TEMPERATURE (°C) R EF ER EN C E V O LT A G E (V ) 7550250-25 1.241 1.242 1.243 1.244 1.245 1.246 1.247 1.248 1.249 1.240 -50 100 REFERENCE VOLTAGE vs. REFERENCE LOAD CURRENT M A X 1 5 6 5 t o c1 3 REFERENCE LOAD CURRENT (µA) R EF ER EN C E V O LT A G E (V ) 20015010050 1.245 1.246 1.247 1.248 1.249 1.250 1.251 1.244 0 250 OSCILLATOR FREQUENCY vs. ROSC M A X 1 5 6 5 t o c1 4 ROSC (kΩ) O S C IL LA TO R F R EQ U EN C Y ( kH z) 10010 100 200 300 400 500 600 700 800 900 0 1 1000 COSC = 470pF COSC = 220pF COSC = 100pF COSC = 47pF AUX_ MAXIMUM DUTY CYCLE vs. FREQUENCY M A X 1 5 6 5 t o c1 5 FREQUENCY (kHz) M A X IM U M D U TY C Y C LE ( % ) 900800100 200 300 500 600400 700 81 82 83 84 85 86 87 88 80 0 1000 COSC = 100pF WHEN THIS DUTY CYCLE IS EXCEEDED FOR 100,000 CLOCK CYCLES, THE MAX1565 SHUTS DOWN STEP-UP STARTUP RESPONSE MAX1565 toc16 100µs/div IOUTSU 100mA/div ONSU 5V/div IIN 1A/div OUTSU 2V/div 0V 0V 0A 0A VOUTSO = 3.3V VIN = 2V BUCK-BOOST STARTUP RESPONSE MAX1565 toc17 4ms/div OUTSD 500mA/div ONSD = ONSU 5V/div IOUTSD 200mA/div OUTSU 1V/div 0V 0V 0V 0A VOUTSU = 3.3V VOUTSD = 1.5V VIN = 2.5V AUX_ STARTUP RESPONSE MAX1565 toc18 2ms/div ON1 5V/div IOUT1 200mA/div OUT1 2V/div 0V 0V 0A VOUT1 = 5V VIN = 2.5V

Page 10

M A X 1 5 6 5 Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply _______________________________________________________________________________________ 9 STEP-UP LOAD TRANSIENT RESPONSE MAX1565 toc19 400µs/div IOUTSU 200mA/div VOUTSU AC-COUPLED 100mV/div 0A 0V VOUTSU = 3.3V VIN = 2.5V STEP-DOWN LOAD TRANSIENT RESPONSE MAX1565 toc20 400µs/div IOUTSD 100mA/div VOUTSD AC-COUPLED 50mV/div 0A 0V VOUTSD = 1.5V VOUTSU = 3.3V VIN = 2.5V Typical Operating Characteristics (continued) (Circuit of Figure 1, TA = +25°C, unless otherwise noted.) Pin Description PIN NAME FUNCTION 1 COMP1 Auxiliary Controller 1 Compensation Node. Connect a series RC from COMP1 to GND to compensate the control loop. COMP1 is actively driven to GND in shutdown and thermal limit. 2 FB1 Auxiliary Controller 1 Feedback Input. For 5V output, short FBSEL1 to GND and connect FB1 to the output voltage. For other output voltages, connect FBSEL1 to OUTSU and connect a resistive voltage-divider from the step-up converter output to FB1 to GND. The FB1 feedback threshold is then 1.25V. This pin is high impedance in shutdown. 3 PGNDA Power Ground. Connect PGNDA and PGNDB together and to GND with short trace as close to the IC as possible. 4 LXSD Step-Down Converter Power-Switching Node. Connect LXSD to the step-down converter inductor. LXSD is the drain of the P-channel switch and N-channel synchronous rectifier. LXSD is high impedance in shutdown. 5 INSD Step-Down Converter Input. INSD can connect to OUTSU, effectively making OUTSD a buck-boost output from the battery. Bypass to GND with a 1µF ceramic capacitor if connected to OUTSU. INSD may also be connected to the battery, but should not exceed OUTSU by more than a Schottky diode forward voltage. Bypass INSD with a 10µF ceramic capacitor when connecting to the battery input. A 10kΩ internal resistance connects OUTSU and INSD. 6 ONSD Step-Down Converter On/Off Control Input. Drive ONSD high to turn on the step-down converter. This pin has an internal 330kΩ pulldown resistor. ONSD does not start until OUTSU is in regulation. 7 C OM P S D Step-Down Converter Compensation Node. Connect a series RC from COMPSD to GND to compensate the control loop. COMPSD is pulled to GND in normal shutdown and during thermal shutdown (see the Step- Down Compensation section).

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MAX1565ETJ+T

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Heisener's commitment to quality has shaped our processes for sourcing, testing, shipping, and every step in between. This foundation underlies each component we sell.

ISO9001:2015, ICAS, IAF, UKAS

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