Global Mixed-mode Technology Inc.
Pin Description
PIN
1
2
3
4
5
6
G5105
NAME
SW
GND
FB
SHDN
FUNCTION
Switch Pin.
The drain of the internal NMOS power switch. Connect this pin to inductor.
Ground Pin.
Feedback Pin.
Active Low Shutdown Pin.
Compensation Pin.
Input Supply Pin.
Bypass this pin with a capacitor as close to the device as possible.
COMP
VCC
Block Diagram
FB
COMP
SW
COMPARATOR
A1
+
A2
+
R
Q
CONTROL
DRIVER
M1
S
1.28V
VREF
RAMP
GENERATOR
OC
+
1MHz
OSCILLATOR
VCC
SHDN
GND
White LED Driver
L1
V
IN
C1
VCC
ON OFF
SHDN
SW
M1
C2
D2
(Optional)
D1
V
OUT
G5105
GND
R2
FB
COMP
R3
R
C
C
C
R4
R1
V
BIAS
V
DIM
PWM Dimming
Ver: 0.6 Preliminary
May 10, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
8
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
