AP3409ADNTR-G1 Diodes Incorporated

A Product Line of Diodes Incorporated AP3409/A 3A, 4MHz HIGH EFFICIENCY SYNCHRONOUS BUCK CONVERTER Description Pin Assignments The AP3409/A is a current mode, PWM synchronous buck DC/DC (Top View) converter, capable of driving a 3A load with high efficiency, excellent Pin 1 Mark line and load regulation. It operates in continuous PWM mode. 1 10 COMP SHDN/RT The AP3409/A integrates synchronous P-channel and N-channel 2 9 FB GND power MOSFET switches with low on-resistance. It is ideal for Exposed Pad 3 8 portable applications powered from a single Li-ion battery. 100% duty SW Connected to VDD PGND cycle and low on-resistance P-channel internal power MOSFET can 7 SW 4 PVDD maximize the battery life. 5 6 PGND PVDD The switching frequency of AP3409/A can be programmable from 300kHz to 4MHz, which allows small-sized components, such as capacitors and inductors. A standard series of inductors from several U-DFN3030-10 (DN Package) For AP3409 different manufacturers are available. This feature greatly simplifies the design of switch-mode power supplies. The AP3409/A is available in U-DFN3030-10 package. (Top View) Pin 1 Mark Features SHDN/RT 1 10 COMP Input Voltage Range: 2.6V to 5.5V 2 9 FB GND Adjustable Output from 0.8V to 5V Exposed Pad 0.8V Reference Voltage with 2% Precision SW 3 8 PGOOD Connected to Output Current: 3A PGND SW 7 4 High Efficiency up to 95% VDD Low R Internal Switches DSON 5 6 PGND PVDD Programmable Frequency: 300kHz to 4MHz Current Mode Control Forced Continuous-mode Operation U-DFN3030-10 (DN Package) 100% Duty Cycle For AP3409A Built-in Soft-start Built-in Short Circuit Protection Built-in Thermal Shutdown Protection Built-in Current Limit Function PGOOD Output Voltage Monitoring (For AP3409A) Applications U-DFN3030-10 package Totally Lead-free & Fully RoHS Compliant (Note 1 & 2) Portable Media Player Halogen and Antimony Free. Green Device (Note 3) Digital Still and Video Cameras Notebook Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See A Product Line of Diodes Incorporated AP3409/A Typical Applications Circuit (Note 4) V IN 5V C 1000pF COMP R 30k COMP R 330k OSC SHDN/RT COMP R2 240k GND FB SW VDD PGND PVDD C1 R1 22pF 510k C IN 22mF L1 2.0 mH V OUT 2.5V/3A C OUT 22 mF 2 Typical Application of AP3409 V IN 5V C 1000pF R 30k COMP COMP R 330k OSC SHDN/RT COMP R2 240k FB GND PGOOD SW R4 100k VDD PGND C1 R1 (PVDD) 22pF 510k C IN 22mF L1 2.0 mH V OUT 2.5V/3A C OUT 22 mF 2 Typical Application of AP3409A V (R1 R2) FB Notes 4: V OUT R2 2 of 11 AP3409/A January 2014 Diodes Incorporated www.diodes.com Document number: DS36789 Rev. 2 - 2 AP3409A AP3409