AX5302
AX5302 is PWM Step-up Controller manufactured by AXElite.
PWM Step-up Controller
GENERAL DESCRIPTION
The AX5302 is high efficient PWM step-up controller. Designed to drive an external N-channel MOSFET, Output voltage is programmable with 1.0V of standard voltage supply internal, and using externally connected ponents, output voltage (FB) can be set up at will. The AX5302 can be operated at switching frequencies of 500k Hz allowing for easy filtering and low noise, the size of the external ponents can be reduced. An enable function and thermal shutdown functions are built inside. The soft-start time can be programmed by outside capacitor; the function prevents overshoot at startup.
Features
Input voltage: 3.0V to 24V Output voltage: Define by N-channel MOS Duty ratio: 0% to 85% PWM control Oscillation frequency: 500KHz (±20%) Soft-start time is programmed by outside capacitor Current Limit is setting by outside resistance Thermal shutdown protection Enable/shutdown function External SW N-channel MOS. SOP-8L Pb-Free Package.
BLOCK DIAGRAM
Vcc Phase pensation + Vref=1.0V PWM Controller EN VEN 8u A
Thermal Shutdown
Regulator
+ Buffer Driver
GATE
Oscillator GND 0.06V
SENSE
1/8
Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.1 Aug.24, 2010
PIN ASSIGNMENT
This package of AX5302 is SOP-8L; the pin assignment is given by: Name Description Shutdown Control Input. ( Top View ) H：normal operation EN L：Shutdown mode EN 1 8 NC FB Feedback pin Vcc 2 7 GND VCC VCC supply pin SENSE Current Limit Sense Voltage FB 3 6 GATE SS Soft-Start pin SS 4 5 SENSE Gate drive for external N-channel GATE MOSFET. SOP
- 8L GND Signal ground pin NC No connection
ORDER/MARKING INFORMATION
Order Information Top Marking
Logo
AX5302 X X
Package Type Packing S: SOP-8L Blank : Tube A : Taping
ABOLUTE MAXIMUM RATINGS (at TA=25°C)
Symbol VCC VFB VEN VSENSE VSS VGATE PD TST TOPJ VOP θJC θJA Rating...
