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MAX5008CUB+T

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MAX5008CUB+T

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Part Number MAX5008CUB+T
Manufacturer Maxim Integrated
Description IC CHARGE PUMP USB 5V 10-UMAX
Datasheet MAX5008CUB+T Datasheet
Package 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
In Stock 1,240 piece(s)
Unit Price $ 3.3905 *
Lead Time Can Ship Immediately
Estimated Delivery Time Dec 4 - Dec 9 (Choose Expedited Shipping)
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Part Number # MAX5008CUB+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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MAX5008CUB+T Specifications

ManufacturerMaxim Integrated
CategoryIntegrated Circuits (ICs) - PMIC - Voltage Regulators - Special Purpose
Datasheet MAX5008CUB+TDatasheet
Package10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Series-
ApplicationsCharge Pump, USB
Voltage - Input2.95 V ~ 5.5 V
Number of Outputs1
Voltage - Output5V
Operating Temperature0°C ~ 70°C
Mounting TypeSurface Mount
Package / Case10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package10-uMAX

MAX5008CUB+T Datasheet

Page 1

Page 2

General Description The MAX5008 charge-pump regulator generates a reg- ulated 5V output up to 125mA with a 2.95V to 5.5V input voltage range. The device includes resistor-program- mable overcurrent limit. The MAX5008 requires a mini- mum number of external components for normal operation. The high 1MHz switching frequency allows the use of small surface-mount ceramic capacitors. The fault-protection circuitry limits the output current when it exceeds the limit set by an external resistor. The output current can range from 1mA to 150mA to accommodate circuit requirements. A FAULT output indicates when the device is in current limit or the out- put is out of regulation. A low-power shutdown mode reduces supply current to less than 1µA and places the output in a high-imped- ance state. The MAX5008 is offered in a space-saving 10-pin µMAX® package that is only 1.1mm high. Applications Flash Memory Supplies USB Host Devices Battery-Powered Systems 3.3V to 5V Local Conversion Features ♦ Regulated 5V Output Up to 125mA ♦ Indefinite Short-Circuit Protection ♦ Adjustable Output Current Limit ♦ No Inductors Required ♦ 0.1µA Shutdown Current ♦ Thermal Shutdown ♦ Fault Output Indicates Overcurrent or Output Voltage Out of Regulation ♦ 2.95V to 5.5V Input Voltage Range ♦ 10-Pin µMAX Package M A X 5 0 0 8 Regulated 5V USB Charge Pump with Programmable Current Limit ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-2426; Rev 1; 7/06 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. PART TEMP RANGE PIN-PACKAGE MAX5008CUB 0°C to +70°C 10 µMAX FAULT OUT 200Ω* RCS 0.4Ω 100kΩ COUT 4.7µF VOUT 5V CEXT 6.8µF CX 0.68µF 4.7µF 47nF* VIN 2.95V TO 5.5V CXN IN CXP RCS CEXT GND PGND 4 6 7 8 5 9 2 1 10 MAX5008 SHDN *USE IF PRECISION CURRENT LIMIT IS REQUIRED. 200Ω* 3 IOUT Typical Operating Circuit Pin Configuration appears at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc.

Page 3

M A X 5 0 0 8 Regulated 5V USB Charge Pump with Programmable Current Limit 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (VIN = SHDN = 3V, CIN = 4.7µF, CX = 0.68µF, CEXT = 6.8µF, COUT = 4.7µF, RCS = 0.4Ω, TA = 0°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C.) 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. IN, SHDN, RCS, FAULT, OUT to GND .....................-0.3V to +6V PGND to GND.....................................................................±0.3V CXN to GND ................................................-0.3V to (VIN + 0.3V) CXP to GND ............................................-0.3V to (VCEXT + 0.3V) CEXT to GND ..........................................-0.3V to (VCEXT + 0.3V) Short-Circuit Duration to GND .......................................Indefinite Continuous Power Dissipation (TA = +70°C) 10-Pin µMAX.................................................................444mW Operating Temperature Range...............................0°C to +70°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS IOUT = 125mA, 4.75V ≤ VOUT ≤ 5.25V 2.95 4.25Input Voltage Range (Note 1) VIN IOUT = 70mA 2.95 5.50 V Input Undervoltage Lockout Threshold Rising edge 2.0 2.35 2.6 V Input Undervoltage Lockout Hysteresis Falling edge 100 mV 0 ≤ IOUT < 30mA, 2.95V < VIN < 5.5V 4.75 5.0 5.30Output Voltage (Note 2) VOUT 0mA ≤ IOUT ≤ 125mA, 2.95V ≤ VIN ≤ 4.25V 4.75 5.0 5.25 V Output Voltage Ripple VRIP 0mA ≤ IOUT ≤ 125mA 100 mV VOUT Fault Threshold VTH VOUT = 5V (nominal), no load 82.5 92.5 %VOUT Maximum Output Current IOUT VOUT = 5V ±4% 100 140 mA IOUT = 0, VIN = 4.25V 0.6 6 No-Load Input Current IQ IOUT = 0, VIN = 3.3V 1 6 mA SHDN Logic High VINH,SHDN 2.4 V SHDN Logic Low VINL,SHDN 0.4 V Shutdown Supply Current IQSHDN SHDN = low 0.1 10 µA Current-Sense Trip Level VCS VCS = IOUT x RCS (Note 3) 55 60 73 mV FAULT Leakage Current VFAULT = 5V, OUT in regulation 1 µA FAULT Logic Low IOUT > ILIMIT, or VOUT < VTH, IFAULT = 1mA 0.4 V IOUT > ILIMIT 2 msFAULT Assertion Delay (Note 4) tFD VOUT < VTH 30 µs FAULT Deassertion Delay (Note 5) tFDD IOUT < ILIMIT and VOUT > 4.5V 16 ms Switching Frequency 0.5 1 1.5 MHz Startup Time tSTART VOUT > VTH, RLOAD = 46Ω, from rising edge of SHDN 200 µs

Page 4

M A X 5 0 0 8 Regulated 5V USB Charge Pump with Programmable Current Limit _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VIN = SHDN = 3V, CIN = 4.7µF, CX = 0.68µF, CEXT = 6.8µF, COUT = 4.7µF, RCS = 0.4Ω, TA = 0°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C.) Note 1: When the input exceeds 4.25V, the power dissipation on the chip exceeds the maximum rating if the output current is 125mA. Note 2: The MIN/MAX limits are 100% production tested at +25°C and +70°C, and guaranteed by design at 0°C. Note 3: IOUT is output current flowing from CEXT. Note 4: The delay from the fault event to the assertion of FAULT. Fault delays are specified with either a current fault or a voltage fault, but not both simultaneously. Note 5: The delay from the removal of the fault event to the deassertion of FAULT. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Thermal Shutdown Junction Temperature 150 °C Thermal Shutdown Hysteresis 30 °C Typical Operating Characteristics (VIN = 3V, CIN = 4.7µF, CX = 0.47µF, COUT = 4.7µF, CEXT = 4.7µF, RCS = 0.4Ω, TA = +25°C, unless otherwise noted.) NO-LOAD SUPPLY CURRENT vs. SUPPLY VOLTAGE M A X 5 0 0 8 t o c0 1 SUPPLY VOLTAGE (V) S U P P LY C U R R EN T (m A ) 5.04.54.03.53.0 0.5 1.0 1.5 2.0 0 2.5 5.5 OUTPUT VOLTAGE vs. LOAD CURRENT M A X 5 0 0 8 t o c0 2 LOAD CURRENT (mA) O U TP U T V O LT A G E (V ) 10010 4.7 4.9 5.1 5.3 5.5 4.5 1 1000 VIN = 2.9V VIN = 5.0V VIN = 3.3V OUTPUT VOLTAGE vs. SUPPLY VOLTAGE M A X 5 0 0 8 t o c0 3 SUPPLY VOLTAGE (V) O U TP U T V O LT A G E (V ) 54321 1 2 3 4 5 6 0 0 6 ILOAD = 100mA

Page 5

M A X 5 0 0 8 Regulated 5V USB Charge Pump with Programmable Current Limit 4 _______________________________________________________________________________________ EFFICIENCY vs. LOAD CURRENT M A X 5 0 0 8 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 = 2.95V VIN = 3.3V 200ns/div OUTPUT WAVEFORM 10mV/div MAX5008 toc05 LINE-TRANSIENT RESPONSE MAX5008 toc07 40µs/div A B 3.6V 3.1V ILOAD = 100mA A: INPUT VOLTAGE: 500mV/div B: OUTPUT VOLTAGE: AC-COUPLED, 100mV/div LOAD-TRANSIENT RESPONSE MAX5008 toc08 40µs/div A B 100mA A: LOAD CURRENT B: OUTPUT VOLTAGE: AC-COUPLED, 100mV/div 10mA 1ms/div SHUTDOWN TIMING MAX5008 toc06 5V 0 5V 0 VOUT RL = 46Ω SHDN Typical Operating Characteristics (continued) (VIN = 3V, CIN = 4.7µF, CX = 0.47µF, COUT = 4.7µF, CEXT = 4.7µF, RCS = 0.4Ω, TA = +25°C, unless otherwise noted.)

Page 6

Detailed Description The MAX5008 charge pump provides a regulated 5V output from a 2.95V to 5.5V input. The device delivers a maximum of 125mA load current. Designed specifically for compact applications, a complete regulator circuit requires a minimum number of external components. Adjustable Current Limit The MAX5008 has an adjustable overcurrent protec- tion. An external current-sense resistor is connected from RCS to OUT to set the current limit. The current limit is defined by: ILIMIT = VCS / RCS where VCS is the current-sense trip level, typically 60mV. For example, ILIMIT = 150mA when RCS = 0.40Ω. When the output current limit is exceeded, the output voltage falls and the device maintains the average out- put current at ILIMIT. Upon removal of the overcurrent condition, the part resumes normal operation. FAULT Indication When IOUT > ILIMIT or VOUT < VTH, FAULT asserts. FAULT is an open-drain output that needs to be con- nected through a 100kΩ (typ) pullup resistor to a logic supply voltage. Thermal Shutdown The MAX5008 has internal thermal shutdown circuitry, which shuts down the device when the die temperature exceeds +150°C. The thermal shutdown circuitry has 30°C hysteresis. Shutdown Mode Driving SHDN low places the device in shutdown mode, which disables the oscillator, the control logic, and the reference. The output goes into high-imped- ance state and drops to ground if loaded. Placing the device in shutdown mode reduces the supply current to less than 0.1µA. In normal operation, SHDN is driven high or connected to IN. Applications Information Capacitor Selection The MAX5008 requires four external capacitors. Their values depend on the required output current. Table 1 shows the capacitor values recommended for different load currents. Input Voltage Range The MAX5008 maintains a regulated 5V output with input voltages from 2.95V to 5.5V. If the input voltage exceeds 4.25V, limit the output current to 75mA or less. This keeps the MAX5008 within its maximum power dis- sipation limits. Layout Considerations All capacitors should be located as close to the IC as practical. Connect GND and PGND through a short, M A X 5 0 0 8 Regulated 5V USB Charge Pump with Programmable Current Limit _______________________________________________________________________________________ 5 IOUT CIN (µF) CX (µF) CEXT (µF) COUT (µF) 50mA 3.3 0.33 3.3 3.3 125mA 4.7 0.68 6.8 4.7 Table 1. Recommended Capacitor Values PIN NAME FUNCTION 1 RCS External Current-Sense Resistor. Connect a resistor from RCS to OUT to set the overcurrent threshold. ILIMIT = 60mV / RCS. 2 OUT Fixed 5V Output. Bypass OUT to GND with a 4.7µF capacitor. 3 FAULT Output Fault Indicator. FAULT is asserted when either IOUT > ILIMIT or VOUT < VTH. FAULT is an open-drain output that is high during normal operation or during shutdown. 4 GND Ground Pin. Connect GND to PGND. 5 SHDN Shutdown Input. When SHDN = low, the device turns off. Drive SHDN high or connect to IN for normal operation. 6 PGND Power Ground Pin. Connect PGND to GND. 7 CXN Negative Terminal of the Charge-Pump Capacitor. Connect a 0.68µF capacitor from CXN to CXP. 8 IN Input Supply, 2.95V to 5.5V. Bypass IN to GND with a 4.7µF ceramic capacitor. 9 CXP Positive Terminal of the Charge-Pump Capacitor. Connect a 0.68µF capacitor from CXP to CXN. 10 CEXT Charge-Pump Output. Bypass CEXT to PGND with a 6.8µF capacitor. Pin Description

Page 7

M A X 5 0 0 8 low-impedance trace, and connect the ground for CIN, CEXT, and COUT directly to PGND in a star configura- tion. Connect RCS to CEXT through a short and low impedance trace. Chip Information TRANSISTOR COUNT: 2632 PROCESS: BiCMOS Regulated 5V USB Charge Pump with Programmable Current Limit 6 _______________________________________________________________________________________ 1 2 3 4 5 10 9 8 7 6 CEXT CXP IN CXNGND FAULT OUT RCS µMAX TOP VIEW PGNDSHDN MAX5008 Pin Configuration IN CXN RCS OUT CONTROL SWITCHES CXP PGND FAULT CEXT SHDN GND MAX5008 Functional Diagram

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