LT1089
High Side Switch
U
FEATURES
DESCRIPTIO
The LT®1089 is a logic driven, high current, high side
switch utilizing bipolar technology. The device is capable
of driving loads up to 7.5A with a low series drop of only
1.5V, and the series drop is specified over the full range of
switch currents. The device has internal current limiting
and thermal overload protection. The input logic is
designed so that the output can drive loads referenced
either above or below the device ground pin. Either
positive or negative logic can be used to drive the input.
The device is available in both TO-3 metal can and TO-220
plastic packages.
■
7.5A Switch Capability
■
Low Series Drop (< 1.5V at 7.5A)
■
Logic Input (Positive or Negative Logic)
■
Current Limited
Thermal Overload
5mA Quiescent Current
■
■
■
10µs Risetime
, LTC and LT are registered trademarks of Linear Technology Corporation.
W
BLOCK DIAGRA
V
LT1089 Switch Voltage
vs Output Current
CC
2
INDICATES GUARANTEED TEST POINT
–55°C ≤ T ≤ 150°C
J
BIAS,
0°C ≤ T ≤ 125°C
THERMAL LIMIT,
CURRENT LIMIT,
OUTPUT DRIVE
J
LOGIC IN
1
0
T
= 150°C
I
≈ 5mA
J
Q
T
= 25°C
J
V
T
= –55°C
OUT
J
0
1
2
3
4
5
6
7
8
9
10
SWITCH CURRENT (A)
LOGIC GND
LT1089 • BD02
LT1089 • BD01
1089fa
1