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AX3512

AXElite
Part Number AX3512
Manufacturer AXElite
Description 600mA Synchronous Step-Down Converter
Published Jul 17, 2014
Detailed Description AX3512 1.4MHz, 600mA Synchronous Step-Down Converter  GENERAL DESCRIPTION AX3512 is a high efficiency monolithic synchr...
Datasheet PDF File AX3512 PDF File

AX3512
AX3512

Overview
AX3512 1.
4MHz, 600mA Synchronous Step-Down Converter  GENERAL DESCRIPTION AX3512 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture.
The device is available in an adjustable version.
Supply current with no load is 250uA and drops to <1uA in shutdown.
The 2.
5V to 5.
5V input voltage range makes AX3512 ideally suited for single Li-Ion, two to three AA battery-powered applications.
100% duty cycle provides low dropout operation, extending battery life in portable systems.
PWM operation provides very low output ripple voltage for noise sensitive applications.
Switching frequency is internally set at 1.
4MHz, allowing the use of small surface mount inductors and capacitors.
The internal synchronous switch increases efficiency and decreases need of an external schottky diode.
Low output voltages are easily supported with the 0.
6V feedback reference voltage.
AX3512 is available in small TSOT-23-5L and TDFN-6L packages.
 FEATURES 2.
5V to 5.
5V Input Voltage Range Output Voltage from 0.
6V to VIN High Efficiency: Up to 95% 1.
4MHz Constant Frequency Operation Up to 600mA Output Current Quiescent Current: 250uA (Typical) No Schottky Diode Required Current Mode Operation for Excellent Line and Load Transient Response Current limit, Enable function Short Circuit Protect (SCP) Build in soft start function ≤ 1µA Shutdown Current TSOT-23-5L and TDFN-6L Pb-Free packages 1/13 Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.
1.
3 Oct.
20, 2011 AX3512  BLOCK DIAGRAM VIN OSC REF 0.
6V SET SLOPE COMP Isense AMP Soft-Star + RESET Icomp FB + PWM LOGIC NON-OVERLAP CONTROL Over-Temperature and Short-Circuit Protection Enable Logic EN  PIN ASSIGNMENT The packages of AX3512 are TSOT-23-5L and TDFN-6L; the pin assignment is given by: FB 5 (Top View) TSOT-23-5L 1 EN 2 3 VIN 4 Name EN VIN SW GND FB NC GND SW FB GND SW 6 5 4 GND 1 2 3 Description Enable pin H：normal operation L：Shutdow...


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