LTC1731-4.2 Linear Technology, LTC1731-4.2 Datasheet - Page 8

• Manufacturer Part Number: LTC1731-4.2
• Description: Lithium-Ion Linear Battery Charger Controller
• Manufacturer: Linear Technology

PACKAGE
RELATED PARTS
PART NUMBER
LT
LT1512
LT1620
LTC1729
LTC1731-4.2
8
TYPICAL
®
1510-5
(0.18)
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
0.007
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
APPLICATION
DESCRIPTION
500kHz Constant-Voltage/Constant-Current Battery Charger
SEPIC Battery Charger
Rail-to-Rail Current Sense Amplifier
Termination Controller for Li-Ion
DESCRIPTION
(0.53 0.015)
0.021 0.006
0 – 6 TYP
C
U
TIMER
0.1 F
U
SEATING
PLANE
Dimensions in inches (millimeters) unless otherwise noted.
50k
R1
2
3
0.040 0.006
(1.02 0.15)
CHRG
TIMER
(0.30)
0.012
Low Dropout Linear Charger
REF
LTC1731-4.2
(LTC DWG # 05-08-1660)
8-Lead Plastic MSOP
GND
V
CC
4
0.0256
7
(0.65)
SENSE
BSC
PROG
MS8 Package
DRV
BAT
8
6
1
5
R
19.6k
PROG
COMMENTS
Most Compact, Up to 1.5A, Charges NiCd, NiMH, Li-Ion Cells
V
Precise Output Current Programming, Up to 32V V
Time or Charge Current Termination, Automatic Charger/Battery
Detection, Status Output, Preconditioning, 8-Lead MSOP
IN
0.034 0.004
(0.86 0.102)
4.5V
Can Be Higher or Lower Than Battery Voltage, 1.5A Switch
V
IN
(0.15 0.102)
0.006 0.004
+
Q1
1/2 Si9934DY
Q2
1/2 Si9934DY
R
0.2
SENSE
I
Li-ION
CELL
BAT
= 500mA
0.193 0.006
(3.00 0.102)
1731 TA03
0.118 0.004*
(4.90 0.15)
C1
1 F
C2
10 F
1731is, sn1731 LT/TP 1299 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1999
1
8
7 6 5
2 3
4
OUT
MSOP (MS8) 1098
(3.00 0.102)
0.118 0.004**
, Up to 10A I
OUT