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AX3503 - 1A Synchronous Step-Down Converter

Description

AX3503 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture.

The device is available in an adjustable version.

Features

  • 2.5V to 6V Input Voltage Range High Efficiency: Up to 94% 1.5MHz Constant Frequency Operation 1A Output Current at VIN=3.6V and VOUT=1.8V Quiescent Current: 35uA (input < 4.2V) No Schottky Diode Required 100% Duty Cycle in Dropout 0.6V Reference Allows Low Output Voltages Current Mode Operation for Excellent Line and Load Transient Response Current limit, Enable function Short Circuit Protect (SCP) ≤ 1µA Shutdown Current SOT-23-5L and TDFN-6L (2.
  • 2) Pb-Free packages 1/13 Axelite Confidential.

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Datasheet preview – AX3503

Datasheet Details

Part number AX3503
Manufacturer AXElite
File Size 1.24 MB
Description 1A Synchronous Step-Down Converter
Datasheet download datasheet AX3503 Datasheet
Additional preview pages of the AX3503 datasheet.

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Full PDF Text Transcription

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AX3503 1.5MHz, 1A Synchronous Step-Down Converter  GENERAL DESCRIPTION AX3503 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 35uA and drops to <1uA in shutdown. The 2.5V to 6V input voltage range makes AX3503 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 1.5MHz, allowing the use of small surface mount inductors and capacitors.
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