LTC4425 Linear Technology, LTC4425 Datasheet - Page 20

• Manufacturer Part Number: LTC4425
• Description: Linear SuperCap Charger
• Manufacturer: Linear Technology

LTC4425
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER
LTC3625-1
LTC3625
LT3485-0/LT3485-1/
LT3485-2/LT3485-3
LT3750
LT3751
LTC3225-1
LTC3225
20
BATTERY
CAR
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
6V to 36V
20k
D1: DIODES INC. DFLS240
L1: SUMIDA CDRH4D22/HP-2R2
L2: WURTH 7440430022
L3, L4 WURTH 744031002
CSP1, CSP2:
DESCRIPTION
1A High Effi ciency SuperCap Charger
1.4A/0.7A/1A/2A Photofl ash Capacitor Charger with Output
Voltage Monitor and IGBT
Capacitor Charger Controller
Capacitor Controller with Regulation
150mA Supercapacitor Charger
330pF
ON
2.2μF
●
OFF
FAX: [phone]
28.7k
RUN
V
RT
PG
V
IN
C
LT3684
GND
22μF
●
www.linear.com
BOOST
Embedded Automotive Backup Controller
EN1
EN2
EN3
MODE
RT
PGOOD
SGND
PGND, 1, 2, 3
BIAS
SW
BD
FB
SV
(UD PACKAGE)
IN
LTC3569
PV
IN
V
OUT
, 1, 2, 3
200k
D1
0.1μF
(5V)
SW1
SW2
SW3
FB1
FB2
FB3
2.2μH
590k
L1
2.2μH
2.5μH
2.5μH
L2
L3
L4
COMMENTS
Programmable Average Charge Current 1A, 12-Lead
3mm × 4mm DFN Package
V
320V, 100μF , V
Charges Any Size Capacitor, 10-Lead MS Package
Charges Any Size Capacitor, 4mm x 5mm QFN-20 Package
Programmable Supercapacitor Charger Designed to Charge Two
Supercapacitors in Series to a Fixed Output Voltage
(4.8V/5/3V Selectable)
IN
10μF
; 1.8V to 10V, Charge Time = 3.7 Seconds for the LT3485-0 (0V to
20pF
20pF
20pF
μC
R7
1.5M
R8
1.2M
11, 12
IN
750k
300k
150k
4
6
= 3.6V), I
240k
240k
240k
5
9
7
8
PFI
PFI_RET
V
FB
PFO
SEL
EN
IN
10μF
4.7μF
4.7μF
SD
LTC4425
< 1μA, 3mm × 3mm 10-Lead DFN
3.3V
1.8V
1.2V
© LINEAR TECHNOLOGY CORPORATION 2010
www.DataSheet4U.com
PROG
V
V
GND
OUT
MID
1, 2
10
13
3
LT 0310 • PRINTED IN USA
R6
500Ω
5V, 2A
C
1F
C
1F
SP1
SP2
4425 TA09
4425p