LTC1163| Datasheet

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LTC1163/LTC1165 Triple 1.8V to 6V High-Side MOSFET Drivers

FEATURES
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DESCRIPTIO

Operates from 1.8V to 6V 0.01uA Standby Current 95uA Operating Current per Channel at 3.3V Fully Enhances N-Channel Switches No External Charge Pump Components Built-In Gate Voltage Clamps Easily Protected Against Supply Transients Controlled Switching ON and OFF Times Compatible with 5V, 3V and Sub-3V Logic Families Available in 8-Pin SOIC

The LTC1163/LTC1165 triple low voltage MOSFET drivers make it possible to switch supply or ground referenced loads through inexpensive, low RDS(ON) N-channel switches from as little as a 1.8V supply. The LTC1165 has inverting inputs and makes it possible to directly replace P-channel MOSFET switches while maintaining system drive polarity. The LTC1163 has noninverting inputs. Micropower operation, with 0.01uA standby current and 95uA operating current, coupled with a power supply range of 1.8V to 6V, make the LTC1163/LTC1165 ideally suited for 2- to 4-cell battery-powered applications. The LTC1163/LTC1165 are also well suited for sub-3V, 3.3V and 5V nominal supply applications. The LTC1163/LTC1165 internal charge pumps boost the gate voltage 8V above a 3.3V rail, fully enhancing inexpensive N-channels for high- or low-side switch applications. The LTC1163/LTC1165 are available in both an 8-pin DIP and an 8-pin SOIC.

APPLICATI
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S

PCMCIA Card 3.3V/5V Switch 2-Cell High-Side Load Switching Boost Regulator Shutdown to Zero Standby Current Replacing P-Channel Switches Notebook Computer Power Management Palmtop Computer Power Management Portable Medical Equipment Mixed 3.3V and 5V Supply Switching

TYPICAL APPLICATI
(1.8V TO 3V)

2-Cell Triple High-Side Switch
18

+ 2-CELL
BATTERY PACK

+
10uF

16
GATE OUTPUT VOLTAGE (V)
RFD14N05LSM RFD14N05LSM RFD14N05LSM

14 12 10 8 6 4 2

IN1 CONTROL LOGIC OR uP

VS

OUT1

IN2 LTC1163 OUT2 LTC1165 IN3 OUT3 GND 2-CELL LOAD 2-CELL LOAD 2-CELL LOAD

LTC1163 HAS NONINVERTING INPUTS LTC1165 HAS INVERTING INPUTS

LTC1163/65 TA01

0 0 1 2 3 4 SUPPLY VOLTAGE (V) 5 6

U
MOSFET Switch Gate Voltage
LTC1163/65 TA02

UO

UO

1

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LTC1163 DATASHEET