Datasheet

EN
BST
SW
ON TIMER
Ron
START
COMPLETE
START
COMPLETE
THERMAL
SHUTDOWN
LEVEL
SHIFT
L
LM3151/2/3
AVDD
DRIVER
REGULATION
COMPARATOR
LOGIC
DrvH
DrvL
CURRENT LIMIT
COMPARATOR
DRIVER
GND
Vbias
VDD
OFF TIMER
PMOS
input
FB
EN
VIN
VIN
VCC
PGND
C
IN
SGND
HG
LG
ERM Control
6V LDO
UVLO
V
CC
V
CC
0.6V
Zero
Current
Detect
Vref =
1 M5
6V
M1
M2
47 pF
SS
0.72V
V
OUT-OV
and
SHORT
CIRCUIT
PROTECTION
0.36V
VDD
I
SS
R
FB
= R
FB1
+ R
FB2
0.72V
0.6V
1.20V
1.20V
R
ON
C
SS
R
FB2
R
FB1
C
OUT
C
BST
V
OUT
V
IN
C
VCC
P
GND
200 mV
LM3151, LM3152, LM3153
SNVS562G –SEPTEMBER 2008–REVISED MARCH 2011 www.ti.com
SIMPLIFIED BLOCK DIAGRAM
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