AA18380
Agamem Microelectronics Inc.
PRELIMINARY
Switching Regulator Controller
■PIN DESCRIPTIONS
Pin No.
Symbol
IN-
I/O
I
Description
1
2
3
4
5
6
Internal error amplifier inverting input pin
Soft start and short circuit protection setting capacitor connection pin
IC power supply pin
SCP
—
—
I
VCC
BR/CTL
OUT
Output current setting and control pin
Output voltage monitoring pin
O
—
GND
Ground pin
Timing capacitor & resistor connection pin for setting the internal PWM
frequency
7
8
OSC
FB
—
O
Error amplifier output pin
■BLOCK DIAGRAM
Vcc
3
OSC
7
0.8V
Sawtooth wave
Reference
Oscillator
Voltage Supply
0.1V
1.25V
0.1V
OUT
5
-
IN-
FB
1
8
-
+
36KΩ
500Ω
Error
Amp.
+
30KΩ
PWM
COMP.
Output drive
Control circuit
+
+
0.5V
0.3V
DTC 0.6V
Soft start SCP
6
2
4
GND
SCP
BR/CTL
2
©Copyright Agamem Microelectronics Inc.
www.agamem.com.tw
2007/1/15
AGAMEM [ AGAMEM MICROELECTRONIC INC. ]
