LTC1155IS8PBF LINEAR TECH, LTC1155IS8PBF Datasheet
LTC1155IS8PBF
Manufacturer Part Number
LTC1155IS8PBF
Description
Manufacturer
LINEAR TECH
Datasheet
1.LTC1155IS8PBF.pdf
(16 pages)
A
FEATURE
TYPICAL
PPLICATI
Laptop Power Bus Switching
SCSI Termination Power Switching
Cellular Phone Power Management
P-Channel Switch Replacement
Relay and Solenoid Drivers
Low Frequency Half H-Bridge
Motor Speed and Torque Control
Fully Enhances N-Channel Power MOSFETs
8 A Standby Current
85 A ON Current
Short-Circuit Protection
Wide Power Supply Range: 4.5V to 18V
Controlled Switching ON and OFF Times
No External Charge Pump Components
Replaces P-Channel High Side MOSFETs
Compatible with Standard Logic Families
Available in 8-Pin SO Package
MAX
5A
R
0.02
Laptop Computer Power Bus Switch with Short Circuit Protection
TTL, CMOS INPUT
SEN
POWER BUS
*IRLR034
R
100k
A
S
DLY
O
PPLICATI
SYSTEM
U
P
S
V
C
0.1 F
S
DLY
= 4.5V TO 5.5V
DS1
G1
IN1
O
GND
LTC1155
GND
U
V
S
*SURFACE MOUNT
DS2
IN2
G2
+
DRIVE
10 F
DISK
TTL, CMOS INPUT
DISPLAY
C
0.1 F
*IRLR034
DLY
R
100k
Micropower MOSFET Driver
DLY
D
The LTC
cost N-channel FETs for high side switching applications.
An internal charge pump boosts the gate above the posi-
tive rail, fully enhancing an N-channel MOSFET with no
external components. Micropower operation, with 8 A
standby current and 85 A operating current, allows use in
virtually all systems with maximum efficiency.
Included on-chip is overcurrent sensing to provide auto-
matic shutdown in case of short circuits. A time delay can
be added in series with the current sense to prevent false
triggering on high in-rush loads such as capacitors and
incandescent lamps.
The LTC1155 operates off of a 4.5V to 18V supply input
and safely drives the gates of virtually all FETs. The
LTC1155 is well suited for low voltage (battery-powered)
applications, particularly where micropower “sleep” op-
eration is required.
The LTC1155 is available in both 8-pin PDIP and 8-pin SO
packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ESCRIPTIO
PRINTER,
ETC.
R
0.02
5A
MAX
®
SEN
1155 dual high side gate driver allows using low
1155 TA01
U
0.25
0.20
0.15
0.10
0.05
0.00
0
Dual High Side
Switch Voltage Drop
OUTPUT CURRENT (A)
1
2
LTC1155
1155 TA02
3
1
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