LTC1731-4.1 Linear Technology, LTC1731-4.1 Datasheet - Page 7

• Manufacturer Part Number: LTC1731-4.1
• Description: Lithium-Ion Linear Battery Charger Controller
• Manufacturer: Linear Technology

APPLICATIONS
Stability
The charger is stable without any compensation when a
P-channel MOSFET is used as the pass transistor.
However, a 10 F capacitor is recommended at the BAT
pin to keep the ripple voltage low when the battery is
disconnected.
PACKAGE
(0.203 – 0.254)
**
0.008 – 0.010
*
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
(0.18)
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
0.007
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,
(0.254 – 0.508)
0.010 – 0.020
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
(0.406 – 1.270)
0.016 – 0.050
DESCRIPTION
(0.53 0.015)
0.021 0.006
45
U
INFORMATION
U
0 – 8 TYP
0 – 6 TYP
W
U
(1.346 – 1.752)
0.053 – 0.069
(0.355 – 0.483)
SEATING
0.014 – 0.019
8-Lead Plastic Small Outline (Narrow 0.150)
PLANE
Dimensions in inches (millimeters) unless otherwise noted.
TYP
0.040 0.006
(1.02 0.15)
(0.30)
0.012
REF
U
(LTC DWG # 05-08-1610)
(LTC DWG # 05-08-1660)
8-Lead Plastic MSOP
0.0256
(0.65)
BSC
S8 Package
MS8 Package
When a PNP transistor is chosen as the pass transistor, a
1000pF capacitor is required from the DRV pin to V
capacitor is needed to help stablize the voltage loop. A
10 F capacitor at the BAT pin is also recommended when
a battery is not present.
(0.86 0.102)
0.034 0.004
(1.270)
0.050
BSC
(0.101 – 0.254)
0.004 – 0.010
(0.15 0.102)
0.006 0.004
(5.791 – 6.197)
0.228 – 0.244
0.193 0.006
(3.00 0.102)
0.118 0.004*
(4.90 0.15)
8
1
1
8
(4.801 – 5.004)
0.189 – 0.197*
7 6 5
2 3
7
2
LTC1731-4.1
4
6
3
MSOP (MS8) 1098
(3.00 0.102)
0.118 0.004**
5
4
(3.810 – 3.988)
0.150 – 0.157**
SO8 1298
CC
. This
7