PAM2312AABADJ

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PAM2312 Document number: DS36389 Rev. 3 - 2 1 of 14 www.diodes.com May 2018 © Diodes Incorporated PAM2312 N E W P R O D U C T 1A STEP-DOWN DC-DC CONVERTER Description The PAM2312 is a step-down current-mode, DC-DC converter. At heavy load, the constant frequency PWM control performs excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2312 provides a power-saving Pulse- Skipping Modulation (PSM) mode to reduce quiescent current under light load operation to save power. The PAM2312 supports a range of input voltages from 2.5V to 5.5V, allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, USB, and other standard power sources. The output voltage is adjustable from 0.6V to the input voltage. All versions employ internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 1µA. Other key features include under-voltage lockout to prevent deep battery discharge. The PAM2312 is available in TSOT25 packages. Features  Efficiency up to 96%  Only 40µA (typ.) Quiescent Current  Output Current: Up to 1A  Internal Synchronous Rectifier  1.5MHz Switching Frequency  Soft Start  Under-Voltage Lockout  Short Circuit Protection  Thermal Shutdown  TSOT25 Packages  Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments Applications  Cellular Phone  Portable Electronics  Wireless Devices  Cordless Phone  Computer Peripherals  Battery Powered Widgets  Electronic Scales  Digital Frame Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Top View TSOT25

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PAM2312 Document number: DS36389 Rev. 3 - 2 2 of 14 www.diodes.com May 2018 © Diodes Incorporated PAM2312 N E W P R O D U C T Typical Applications Circuit Fixed Output Voltage (EOL) Adjustable Output Voltage        2R 1R 1x6.0VO Pin Descriptions Pin Number TSOT25 Function Pin Name 4 VIN Chip Main Power Supply Pin 2 GND Ground 1 EN Enable Control Input. Force this pin voltage above 1.5V, enables the chip, and below 0.3V shuts down the device. 5 VOUT/FB VOUT: Output voltage feedback pin, an internal resistive divider divides the output voltage down for comparison to the internal reference voltage. FB: Feedback voltage to internal error amplifier, the threshold voltage is 0.6V. 3 SW The drains of the internal main and synchronous power MOSFET. Functional Block Diagram VIN VIN

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PAM2312 Document number: DS36389 Rev. 3 - 2 3 of 14 www.diodes.com May 2018 © Diodes Incorporated PAM2312 N E W P R O D U C T Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground. Parameter Rating Unit Input Voltage -0.3 to +6.0 V EN, FB Pin Voltage -0.3 to VIN V SW Pin Voltage -0.3 to (VIN +0.3) V Junction Temperature +150 °C Storage Temperature Range -65 to +150 °C Soldering Temperature +300, 5s °C Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Parameter Rating Unit Supply Voltage 2.5 to 5.5 V Operation Temperature Range -40 to +85 °C Junction Temperature Range -40 to +125 Thermal Information Symbol Parameter Package Max Unit θJC Thermal Resistance (Junction to Case) TSOT25 (Note 4) 130 °C/W θJA Thermal Resistance (Junction to Ambient) TSOT25 250 PD Internal Power Dissipation TSOT25 400 mW Note: 4. The maximum output current for TSOT25 package is limited by internal power dissipation capacity as described in Application Information herein after.

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PAM2312 Document number: DS36389 Rev. 3 - 2 4 of 14 www.diodes.com May 2018 © Diodes Incorporated PAM2312 N E W P R O D U C T Electrical Characteristics (@TA = +25°C, VIN = 3.6V, VO = 1.8V, CIN = 10µF, COUT = 10µF, L = 4.7µH, unless otherwise specified.) Symbol Parameter Test Conditions Min Typ Max Unit VIN Input Voltage Range - 2.5 - 5.5 V VFB Regulated Feedback Voltage - 0.588 0.6 0.612 V ΔVFB Reference Voltage Line Regulation - - 0.3 - %/V VO Regulated Output Voltage Accuracy IO = 100mA -3 - +3 % IPK Peak Inductor Current VIN = 3V, VFB = 0.5V or VO = 90% - 1.5 - A LNR Output Voltage Line Regulation VIN = 2.5V to 5v, IO = 10mA - 0.2 0.5 %/V LDR Output Voltage Load Regulation IO = 800mA - 0.5 1.5 % IQ Quiescent Current No Load - 40 70 µA ISD Shutdown Current VEN = 0V - - 1 µA fOSC Oscillator Frequency VO = 100% 1.2 1.5 1.8 MHz VFB = 0V or VO = 0V - 500 - kHz RDS(ON) Drain-Source On-State Resistance IDS = 100mA P MOSFET - 0.3 0.45 Ω N MOSFET - 0.35 0.5 Ω ILSW SW Leakage Current - - ±0.01 1 µA η High Efficiency - - 96 - % VEH EN Threshold High - 1.5 - - V VEL EN Threshold Low - - - 0.3 V IEN EN Leakage Current - - ±0.01 - µA OTP Over Temperature Protection - - +150 - °C OTH OTP Hysteresis - - +30 - °C

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PAM2312 Document number: DS36389 Rev. 3 - 2 5 of 14 www.diodes.com May 2018 © Diodes Incorporated PAM2312 N E W P R O D U C T Typical Performance Characteristics (@TA = +25°C, CIN = 10µF, CO = 10µF, L = 4.7µH, unless otherwise specified.)

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PAM2312 Document number: DS36389 Rev. 3 - 2 6 of 14 www.diodes.com May 2018 © Diodes Incorporated PAM2312 N E W P R O D U C T Typical Performance Characteristics (Cont.) (@TA = +25°C, CIN = 10µF, CO = 10µF, L = 4.7µH, unless otherwise specified.)

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PAM2312 Document number: DS36389 Rev. 3 - 2 7 of 14 www.diodes.com May 2018 © Diodes Incorporated PAM2312 N E W P R O D U C T Typical Performance Characteristics (Cont.) (@TA = +25°C, CIN = 10µF, CO = 10µF, L = 4.7µH, unless otherwise specified.)

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PAM2312 Document number: DS36389 Rev. 3 - 2 8 of 14 www.diodes.com May 2018 © Diodes Incorporated PAM2312 N E W P R O D U C T Typical Performance Characteristics (Cont.) (@TA = +25°C, CIN = 10µF, CO = 10µF, L = 4.7µH, unless otherwise specified.)

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PAM2312 Document number: DS36389 Rev. 3 - 2 9 of 14 www.diodes.com May 2018 © Diodes Incorporated PAM2312 N E W P R O D U C T Typical Performance Characteristics (Cont.) (@TA = +25°C, CIN = 10µF, CO = 10µF, L = 4.7µH, unless otherwise specified.)