LTC3355_15 Datasheet, PDF (9/20 Pages) Linear Technology – 20V 1A Buck DC/DC with Integrated SCAP Charger and Backup Regulator

LTC3355
SIMPLIFIED BLOCK DIAGRAM
OVP
UVLO
R7
PFI
1
R8
V_LOGIC
PFOB
10
CPGOOD
9
15
V_OUT
V_IN
C_VINM5
6
2
3
5
V_INM5
FB
MODE
V_IN
V_IN
L1
V_OUT
R1
C_OUT
R2
ENB
START-UP
INTV_CC CAP REG
CLK
0.8V
OVP
EN
LOGIC
VC
1A
SW1 ₇
0.8V +
SS
FB
–
D1 D2
C_VIN
0.8V
0.74V
ENB
EN
BUCK
I_LIM
CLK UVLO
V_IN
V_{INS 4}
OVP
ENB
MODE
FB
–
0.8V ⁺
LOGIC
BILIM
SW2
16
5A
17
SW2
R_SENSE
MAIN
INPUT
C_IN SUPPLY
RSTB
13
CLK
INTV_CC
18
D
250ms
DELAY
C1
FB
0.8V
0.74V
CFB
11
R3
R4
CC/CV CHARGER
V_REF
EN
I_OUT
I_REF
EN_CHG V_CAP
8
14
I_CHG
12
R5
SCAP
BOOST
0.8V V TO I
V_CBST
I_BSTPK
19
20
R_C
R6
C_C
L2
3355 F01
Figure 1. LTC3355 Block Diagram
For more information www.linear.com/LTC3355
3355fb
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