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AX3163A Datasheet Preview

AX3163A Datasheet

PWM Control 3A Step-Down Converter

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AX3163
PWM Control 3A Step-Down Converter
GENERAL DESCRIPTION
AX3163/A consists of step-down switching regulator with PWM control. These devise
include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and
etc.
AX3163/A provides low-ripple power, high efficiency, and excellent transient
characteristics. The PWM control circuit is able to the duty ratio linearly form 0 up to 100%.
This converter is build out soft start function that prevents overshoot and inrush current at
startup. An over current protect function and short circuit protect function are built inside,
and when OCP or SCP happens, the operation frequency will be reduced. An external
compensation is easily to system stable; the low ESR output capacitor can be used.
With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode
connected externally, these ICs can function as step-down switching regulators. They serve
as ideal power supply units for portable devices when coupled with the SOP-16L with
exposed pad package, providing such outstanding features as low current consumption.
Since this converter can accommodate an input voltage up to 58V, it is also suitable for the
operation via an AC adapter.
FEATURES
- Input voltage10.8V to 58V
- Output voltage3.3V to 56V
- Duty ratio0% to 100% PWM control
- Enable and Soft-Start function
- Current Limit, Short Circuit Protect (SCP) and Thermal Shutdown protection
- Built-in internal SW P-channel MOS.
- SOP-16L-EP Pb-Free package.
1/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.13, 2011




AXElite

AX3163A Datasheet Preview

AX3163A Datasheet

PWM Control 3A Step-Down Converter

No Preview Available !

AX3163
BLOCK DIAGRAM
EN SS
CURRENT
SOURCE
BIAS
1. 23V
REFERENCE
2.5 V
REGULATOR
START - UP
5uA
VCC
Current
limit
VFB Oscillator
+_AMP
COMP.
+
COMP.
FB COMP
PWM - Switched
Control Circuit
Thermal
Shutdown
SW
VGATE
Vss
PIN ASSIGNMENT
The package of AX3163/A is SOP-16L-EP; the pin assignment is given by:
Name
Description
SS Soft-start pin
EN ON/OFF Shutdown pin
VSS
VGATE
VCC
SW
FB
GND pin
Driver GATE clamping pin. The
pin must connect a 1uF capacitor
to VCC
IC power supply pin
Switch pin. Connect external
inductor and diode here.
Feedback pin
COMP Compensation pin
NC No Connection
2/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.13, 2011


Part Number AX3163A
Description PWM Control 3A Step-Down Converter
Maker AXElite
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