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AX3513

AXElite
Part Number AX3513
Manufacturer AXElite
Description 1A Synchronous Step-Down Converter
Published Jan 23, 2014
Detailed Description AX3513 1.4MHz, 1A Synchronous Step-Down Converter ™ GENERAL DESCRIPTION AX3513 is a high efficiency monolithic synchrono...
Datasheet PDF File AX3513 PDF File

AX3513
AX3513


Overview
AX3513 1.
4MHz, 1A Synchronous Step-Down Converter ™ GENERAL DESCRIPTION AX3513 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 6V input voltage range makes AX3513 ideally suited for single Li-Ion, two to four AA battery-powered applications.
100% duty cycle provides low dropout operation, extending battery life in portable systems.
PWM pulse skipping mode 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.
AX3513 is available in small TSOT23-5L and TDFN-6L packages.
™ FEATURES 2.
5V to 6V Input Voltage Range Output Voltage from 0.
6V to VIN High Efficiency: Up to 96% 1.
4MHz Constant Frequency Operation Up to 1A 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 TSOT23-5L and TDFN-6L Pb-Free packages 1/13 Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.
1.
3 Jun.
25, 2010 Free Datasheet http://www.
datasheet4u.
com/ AX3513 ™ 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 AX3513 are TSOT23-5L and TDFN-6L; the pin assignment is given by: FB 5 (Top View) TSOT23-5L 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 De...


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