Datasheet

LTC4425
20
4425f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2010
LT 0510 • PRINTED IN USA
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC3225-1
LTC3225
150mA Supercapacitor Charger Programmable Supercapacitor Charger Designed to Charge Two
Supercapacitors in Series to a Fixed Output Voltage
(4.8V/5/3V Selectable)
LT3485-0/LT3485-1/
LT3485-2/LT3485-3
1.4A/0.7A/1A/2A Photofl ash Capacitor Charger with Output
Voltage Monitor and IGBT
V
IN
; 1.8V to 10V, Charge Time = 3.7 Seconds for the LT3485-0 (0V to
320V, 100µF, V
IN
= 3.6V), I
SD
< 1µA, 3mm × 3mm 10-Lead DFN
LT3750 Capacitor Charger Controller Charges Any Size Capacitor, 10-Lead MS Package
LT3751 Capacitor Controller with Regulation
Charges Any Size Capacitor, 4mm × 5mm QFN-20 Package
TYPICAL APPLICATION
LTC4425
LTC3569
(UD PACKAGE)
V
IN
FB
PFI
SEL
EN
PFO
PFI_RET
V
OUT
V
OUT
(5V)
V
MID
PROG
GND
C
SP1
1F
C
SP2
1F
8
4
6
µC
11, 12
R7
1.5M
R8
1.2M
9
5
7
3
13
10
1, 2 5V, 2A
R6
500
SV
IN
PV
IN
, 1, 2, 3
SW1
PGND, 1, 2, 3
SGND
SW2
SW3
PGOOD
FB1
FB2
FB3
L2
2.2µH
10µF20pF 750k
240k
SW
BIAS
FB
V
C
PG
RT
V
IN
BD
10μF200k
28.7k
L1
2.2µH
22µF
590k
20k
GND
2.2μF
LT3684
RUN
BOOST
3.3V
L3
2.5µH
4.7µF20pF 300k
240k
1.8V
L4
2.5µH
4.7µF20pF 150k
240k
1.2V
OFFON
CAR
BATTERY
D1
330pF
6V to 36V
0.1µF
EN1
EN2
EN3
MODE
RT
D1: DIODES INC. DFLS240
L1: SUMIDA CDRH4D22/HP-2R2
L2: WURTH 7440430022
L3, L4 WURTH 744031002
CSP1, CSP2: CAP-XX HS203F
4425 TA09
Embedded Automotive Backup Controller