lx1673 Microsemi Corporation, lx1673 Datasheet - Page 6

• Manufacturer Part Number: lx1673
• Description: High Frequency Pwm Regulator
• Manufacturer: Microsemi Corporation

Copyright © 2004
Rev 1.0, 3/18/2005
TM
EAO
EA+
EA-
VS
VOUT 2
CSS
V
Compensation
+
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
-
REF
V
Amplifier/
TRIP
CS
20k
+V
SS
I
SET
+
Comp
-
CS Comp
+
-
I
RESET
Figure 1 – Block Diagram of PWM Phase
+5V
Figure 2 – LDO Controller Block Diagram
Oscillator
SS1
Ramp
R
SET
Integrated Products Division
DIS
R
S
PWM
B L O C K D I A G R A M
F
R
FAULT
Q
Q
®
Microsemi
LDFB
LDGD
UVLO
LDDIS
S
S
S
LDVCC
UVLO
V
REF
TEMP
PWGD
High Frequency PWM Regulator
Hiccup
-
P
RODUCTION
5.5V
16V
I
SET
D
VCC
VCCL
TDRV
BDRV
VC1
PGND
ATA
+5V
+5V
LDVCC
S
+12V
HEET
Vin (5V)
C
L1
IN
C
ESR
OUT
LX1673
V out 1
Page 6