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AX3515A

AXElite
Part Number AX3515A
Manufacturer AXElite
Description Dual High-Efficiency PWM Step-Down DC-DC Converter
Published Jul 17, 2014
Detailed Description AX3515A Dual High-Efficiency PWM Step-Down DC-DC Converter  GENERAL DESCRIPTION The AX3515A is a dual high-efficiency P...
Datasheet PDF File AX3515A PDF File

AX3515A
AX3515A

Overview
AX3515A Dual High-Efficiency PWM Step-Down DC-DC Converter  GENERAL DESCRIPTION The AX3515A is a dual high-efficiency Pulse-Width-Modulated (PWM) step-down DC-DC converter.
It is capable of delivering 1A output current over a wide input voltage range from 2.
5V to 5.
5V, the AX3515A is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and other handheld devices.
Two operational modes are available: PWM/Low-Dropout auto-switch and shutdown modes.
Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode.
No external Schottky diode is required in practical application.
The AX3515A enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper PMOS.
The AX3515A enter shutdown mode and consumes less than 0.
1μA when EN pin is pulled low.
The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operation frequency of 1.
4MHz.
This along with small TDFN-10L (3x3) package provides small PCB area application.
Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.
 FEATURES - 1.
4MHz Fixed-Frequency PWM Operation - Small 10-Lead TDFN Package € •yÑb R ` 2.
5V to 5.
5V Input Voltage Ûmw Range m V o c Adjustable Output Voltage from 0.
6V to V IN .
ch e t 1A Output Current/per channel ofo g .
High Efficiency : up to w 95% w wRequired No Schottky Diode 1/12 Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.
1.
2 Oct.
20, 2011 AX3515A  BLOCK DIAGRAM VIN1 OSC FB 0.
6V SET SLOPE COMP Isense AMP Soft-Star + RESET Icomp FB1 + PWM LOGIC NON-OVERLAP CONTROL Over-Temperature and Short-Circuit Protection Enable Logic EN1 VIN2 OSC FB 0.
6V SET SLOPE COMP Isense AMP Soft-Star VÛmw`R•yÑb€ FB2 + - - RESET Icomp + PWM...


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