22
LTC1479
Dual Li-Ion Battery Power Management System
1479 TA03
DCIN
330
BAT1
BAT2
+
+
V
+
SW V
GG
C3
1µF
50V
L1*
1mH
C4
1µF
50V
V
CC
R
SENSE
0.033
SW A SW B
SW C SW D
SW E SW F
GA GB GC GD GE GFSAB SCD SEF SENSE
+
SENSE
V
CCP
C2
2.2µF
16V
C1
0.1µF
V
BAT
POWER
MANAGEMENT
µP
BDIV
V
BKUP
DCDIV
LTC1479
GG SG
GH SH
NiCD
CELL
1812LS-105 XKBC, COILCRAFT
DT1608-223, COILCRAFT
CTX33-2, COILTRONICS
*
**
***
R
B2
909k
1%
R
DC2
205k
1%
R
DC1
12.1k
1%
R
B1
121k
1%
+
LOBAT
DCINGOOD
TO INPUT 
OF DC/DC 
CONVERTER
L2**
10µH
3DM
5V
CC
FROM 
DC/DC
V
CC
D1 
MBR0530
BATSEL
GND BATDIS DCIN/BAT
CHGSEL
DC INPUT
(FROM AC
ADAPTOR)
V
CC
D2
MBRS140T
R5
300
C8
1µF
PROG
R
PROG
3.83k
1%
R6
1k
R7
649k
0.25%
R8
115k
0.25%
C9
0.1µF
V
C
SW
BOOST
SENSE
OVP
BAT
GND
C7
0.22µF
D3
1N4148
L3***
33µH
D4
MBRS140T
LT1510
SW H
Si9926DY
C6
10µF
CERAMIC
C
CHG
22µF
TANT
(CHARGER OUTPUT)
Si4936DY
Si4936DY
Si4936DY
SW G
Si9926DY
Q1
2N7002
R2
390k
1%
R3
100k
1%
+
+
C
BAT1
10µF
C
BAT2
10µF
SMBUS
BAT2
4 Li-ION
SMART
BATTERY
PACK
BAT1
4 Li-ION
SMART
BATTERY
PACK
CHGMON
R
BAT1
R
BAT1
R
BAT2
R
BAT2
+
+
C5
0.1µF
C11
0.1µF
R1
22k
100k
R7
470k
4
8
7
3
5
C10
0.1µF
1
6
2
5V
CC
FROM
DC/DC
D5
BAS16LT1
Q2
2N7002
ROHM
DTA144E
R8
10k
(BACKUP)
1, 7-10, 16
6
7
14, 15
11
6
5
3
2
SW
FB
SHDN
V
IN
GNDI
LIM
LBI
LBO
LT1304
(BOLD LINES INDICATE HIGH CURRENT PATHS)
+
C
DCIN
10µF
35V
ALUM
0.1µF
TYPICAL APPLICATIONS N
U
23
LTC1479
Dual Li-Ion Battery Power Management System (Using an LT1511, 3A Charger)
TYPICAL APPLICATIONS N
U
1479 TA04
DCIN
BAT1
BAT2
+
+
V
+
SW V
GG
C3
1µF
50V
L1*
1mH
C4
1µF
50V
V
CC
R
SENSE
0.033
SW A
330
SW B
SW C SW D
SW E SW F
GA GB GC GD GE GFSAB SCD SEF SENSE
+
SENSE
V
CCP
C2
2.2µF
16V
C1
0.1µF
V
BAT
POWER
MANAGEMENT
µP
BDIV
V
BKUP
DCDIV
LTC1479
GG SG
GH SH
NiCD
CELL
1812LS-105 XKBC, COILCRAFT
DT1608-223, COILCRAFT
CTX20-4, COILTRONICS
*
**
***
R
B2
1.05M
1%
R
DC2
205k
1%
R
DC1
12.1k
1%
R
B1
121k
1%
+
LOBAT
DCINGOOD
TO INPUT 
OF DC/DC 
CONVERTER
L2**
10µH
3DM
5V
CC
FROM 
DC/DC
V
CC
D1 
MBR0530
BATSEL
GND BATDIS DCIN/BAT
CHGSEL
DC INPUT
(FROM AC
ADAPTOR)
SW H
Si9926DY
Si4936DY
Si4936DY
Si4936DY
SW G
Si9926DY
R2
390k
1%
R3
100k
1%
+
+
C
BAT1
10µF
C
BAT2
10µF
SMBUS
BAT2
4 Li-ION
SMART
BATTERY
PACK
BAT1
4 Li-ION
SMART
BATTERY
PACK
CHGMON
R
BAT1
R
BAT1
R
BAT2
R
BAT2
+
C5
0.1µF
C15
0.1µF
R1
22k
R11
470k
100k
4
8
7
3
5
C14
0.1µF
1
6
2
5V
CC
FROM
DC/DC
D5
BAS16LT1
Q2
2N7002
ROHM
DTA144E
R12
10k
(BACKUP)
SW
FB
SHDN
V
IN
GNDI
LIM
LBI
LBO
LT1304
V
CC
R5
500
C9
0.33µF
C8
1µF
PROG
10
19
18
11
6
2
18
8
14 12
3
1, 4, 5, 7,
16, 23, 24
9
20 TO 22
R
PROG
4.93k
1%
C10
200pF
V
C
SW
UV
BOOSTCOMP1
SPIN
BAT SENSE
GND
C13
0.47µF
C11
50pF
C12
1µF
C7
10µF
D3
MBR0540T
L3***
20µH
D2
MBRS340T
LT1511
C6
10µF
CERAMIC
+
C
CHG
22µF
TANT
+
C
DCIN
10µF
35V
ALUM
+
(CHARGER OUTPUT)
Q1
2N7002
R6
1k
R7
649k
0.25%
R9
6.8k
R10
5k
R4
500
R
S4
0.05
R8
115k
0.25%
R
S3
200
1%
R
S2
200
1%
R
S1
0.033
OVP
CLPCLN
D1
MBRS340T
(BOLD LINES INDICATE HIGH CURRENT PATHS)
0.1µF
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
24
LTC1479
1479f LT/TP 0697 7K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1996
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTION
U
G Package
36-Lead Plastic SSOP (0.209)
(LTC DWG # 05-08-1640)
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT1304 Micropower DC/DC Step-Up Converter 5V at 200mA from 2 Cells, I
Q
= 10µA in Shutdown
LTC1435 High Efficiency Synchronous Step-Down Converter Fixed Frequency, Ultrahigh Efficiency
LTC1438 Dual High Efficiency Synchronous Step-Down Converter Fixed Frequency, PLL Lockable, Ultrahigh Efficiency
LTC1473 Dual PowerPath Switch Driver Protected Power Management Building Block
LT1510 Constant-Voltage/Constant-Current Battery Charger 1.5A Internal Switch, Precision 0.5% Reference
LT1511 Constant-Voltage/Constant-Current 3A Battery Charger Adapter Current Limit Loop
LTC1538-AUX Dual, Synchronous Controller with Aux Regulator 5V Standby in Shutdown
LT1620 Battery Charger Current Controller 96% Efficiency When Used with LTC1435
LT1621 Dual Battery Charger Current Controller For Dual Loop Applications
G36 SSOP 1196
0.005 – 0.009
(0.13 – 0.22)
0° – 8°
0.022 – 0.037
(0.55 – 0.95)
0.205 – 0.212**
(5.20 – 5.38)
0.301 – 0.311
(7.65 – 7.90)
1234
5
6
7
8 9 10 11 12 14 15 16 17 1813
0.499 – 0.509*
(12.67 – 12.93)
2526 22 21 20 19232427282930313233343536
0.068 – 0.078
(1.73 – 1.99)
0.002 – 0.008
(0.05 – 0.21)
0.0256
(0.65)
BSC
0.010 – 0.015
(0.25 – 0.38)
DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH 
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD 
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
FAX: (408) 434-0507
TELEX: 499-3977
www.linear-tech.com

LTC1479IG#PBF

Mfr. #:
Manufacturer:
Analog Devices / Linear Technology
Description:
Power Management Specialized - PMIC PwrPath Cntr for 2x Bat Ss
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union