16

LT1769

1769f LT/TP 0999 4K • PRINTED IN USA

©LINEAR TECHNOLOGY CORPORATION 1999

D1

L1

GND

GND

1769 F14

TO

GND

TO

GND

NOTE: CONNECT ALL GND PINS TO EXPANDED PC LANDS FOR PROPER HEAT SINKING

GND

GND

GND

SW

BOOST

UV

GND

GND

OVP

CLP

CLN

COMP1

SENSE

GND

GND

GND

GND

GND

PROG

COMP2

BAT

SPIN

GND

Figure 14. Critical Electrical and Thermal Path Layout

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

PART NUMBER

DESCRIPTION

COMMENTS

LTC

Microprocessor-Controlled Battery Management System

Can Charge, Discharge and Gas Gauge NiCd and Lead-Acid

Batteries with Software Charging Profiles

LT1372/LT1377

500kHz/1MHz Step-Up Switching Regulators

High Frequency, Small Inductor, High Efficiency Switchers, 1.5A Switch

LT1376

500kHz Step-Down Switching Regulator

High Frequency, Small Inductor, High Efficiency Switcher, 1.5A Switch

LT1505

High Current, High Efficiency Battery Charger

94% Efficiency, Synchronous Current Mode PWM

LT1510

Constant-Voltage/Constant-Current Battery Charger

Up to 1.5A Charge Current for Lithium-Ion, NiCd and NiMH Batteries

LT1511

Constant-Voltage/Constant-Current Battery Charger

Up to 3A Charge Current for Lithium-Ion, NiCd and NiMH Batteries

LT1512/LT1513

SEPIC Battery Chargers

LTC1729

Li-Ion Battery Charger Termination Controller

Preconditioning If Cell < 2.7V, 3hr Time-Out, C/10 Detection, Temp Sensor

Pin, Charger and Battery Detection

LTC1759

SMBus Smart Battery Charger

RELATED PARTS

Dimensions in inches (millimeters) unless otherwise noted.

GN Package

28-Lead Plastic SSOP (Narrow 0.150)

(LTC DWG # 05-08-1641)

GN28 (SSOP) 1098

* 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

0.016 – 0.050

(0.406 – 1.270)

0.015

± 0.004

(0.38

± 0.10)

× 45°

0

° – 8° TYP

0.0075 – 0.0098

(0.191 – 0.249)

0.053 – 0.069

(1.351 – 1.748)

0.008 – 0.012

(0.203 – 0.305)

0.004 – 0.009

(0.102 – 0.249)

0.0250

(0.635)

BSC

0.386 – 0.393*

(9.804 – 9.982)

12

3

4

5

6

7

8

9 10 11 12

0.229 – 0.244

(5.817 – 6.198)

0.150 – 0.157**

(3.810 – 3.988)

20

21

22

23

24

25

26

27

28

19 18 17

13 14

1615

0.033

(0.838)

REF