LTC1163/LTC1165
Triple 1.8V to 6V High-Side
MOSFET Drivers
FEATURES
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Operates from 1.8V to 6V
0.01碌A Standby Current
95碌A 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 R
DS(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 polar-
ity. The LTC1163 has noninverting inputs.
Micropower operation, with 0.01碌A standby current and
95碌A 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 inexpen-
sive 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
s
s
s
s
s
s
s
s
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
+
10碌F
16
GATE OUTPUT VOLTAGE (V)
RFD14N05LSM
RFD14N05LSM
RFD14N05LSM
14
12
10
8
6
4
2
IN1
CONTROL
LOGIC
OR
碌P
V
S
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 鈥?TA01
0
0
1
2
3
4
SUPPLY VOLTAGE (V)
5
6
U
MOSFET Switch Gate Voltage
LTC1163/65 鈥?TA02
UO
UO
1
1
2
3
4
5
6
7
8
