LTC3552-1 Linear Technology, LTC3552-1 Datasheet - Page 9

• Manufacturer Part Number: LTC3552-1
• Description: Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter
• Manufacturer: Linear Technology

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BLOCK DIAGRA
CHRG
V
V
RUN2
RUN1
PWR
OUT2
OUT1
V
V
FB1
FB2
EN
15
16
10
3
9
6
4
7
8
R
ENABLE
REGULATOR 1
0.6V REF
REGULATOR 2 (IDENTICAL TO REGULATOR 1)
R1 = 240k, R2 = 120k, FOR REGULATOR 1
R1 = 195k, R2 = 120k, FOR REGULATOR 2
SHUTDOWN
0.55V
0.65V
0.6V
R1
R2
V
CHARGE
W
FB
EN
LOGIC
OSC
+
–
–
+
+
–
UVDET
OVDET
TERM
SHDN
PWR
EA
120°C
T
DIE
I
UV
OV
TH
OSC
T
A
–
0.35V
SLOPE
CA
COMP
+
S
R
LATCH
–
+
RS
BURST
C1
V
Q
Q
CC
–
+
EN
SWITCHING
BLANKING
CIRCUIT
SLEEP
LOGIC
1×
AND
1×
–
I
COMP
SHOOT-
–
I
THRU
ANTI
RCMP
MA
V
14
R3
1V
R4
0.1V
R5
+
IN
+
–
CLAMP
BURST
+
1.21V
REF
VA
5µA
+
–
V
CC
5Ω
1000×
V
CC
LTC3552-1
R1
R2
13
17
12
11
1
2
5
PROG
GND
SW2
BAT
ITERM
SW1
V
CC
R
PROG
R
TERM
35521f
9