KA3525A
SMPS Controller
www.
fairchildsemi.
com
Features
• 5V ±1% Reference • Oscillator Sync Terminal • Internal Soft Start • Deadtime Control • Under
Voltage Lockout
Description
The KA3525A is a monolithic integrated circuit that includes all of the control circuits necessary for a pulse width modulating regulator.
There are a
voltage reference, an error amplifier, a pulse width modulator, an oscillator, an under
voltage lockout, a soft start circuit, and the output driver in the chip.
16-DIP
Internal Block Diagram
1
VREF 16 VCC 15 GND 12
BAND GAP REF 5V
U.
V.
L.
O.
EA(-) 1 EA(+) 2 EAOUT 9
_
ERR AMP +
C8
(SOFT START)
5K 10
SHUT DOWN
CT 5
7
5K DISCHARGE
_
PWM COMP +
LATCH SR
OSCIL...