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AX3162A Datasheet Preview

AX3162A Datasheet

PWM Control 2A Step-Down Converter

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AX3162
PWM Control 2A Step-Down Converter
GENERAL DESCRIPTION
AX3162/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.
AX3162/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-8L 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 voltage10V 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-8L-EP Pb-Free package.
1/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Sep.28, 2011




AXElite

AX3162A Datasheet Preview

AX3162A Datasheet

PWM Control 2A Step-Down Converter

No Preview Available !

AX3162
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 AX3162/A is SOP-8L-EP; the pin assignment is given by:
EN
VSS
VGATE
VCC
1
2
3
4
( Top View )
SW
SOP-8L-EP
8 SS
7 COMP
6 FB
5 SW
Name
EN
VSS
VGATE
VCC
SW
FB
COMP
SS
Description
ON/OFF Shutdown pin
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
Compensation pin
Soft-start pin
ORDER/MARKING INFORMATION
Order Information
Top Marking
AX3162 X XX X
Frequency Package Type Packing
Blank : 120KHz ES: SOP-8L-EP Blank : Tube
A: 250KHz
A : Taping
AXLogo 3 1 6 2
X YYWWX
Blank: AX3162
A: AX3162A
Part number
ID code:internal
WW: 01~52
Year: 10=2010
11=2011
2/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Sep.28, 2011


Part Number AX3162A
Description PWM Control 2A Step-Down Converter
Maker AXElite
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