LTC1156 Linear Technology, LTC1156 Datasheet - Page 4

• Manufacturer Part Number: LTC1156
• Description: Quad High Side Micropower MOSFET Driver with Internal Charge Pump
• Manufacturer: Linear Technology

OPER
TYPICAL PERFOR
LTC1156
BLOCK
The LTC1156 contains four independent power MOSFET
gate drivers and protection circuits (refer to the Block
Diagram for detail). Each section of LTC1156 consists of
the following functional blocks:
4
1000
900
800
700
600
500
400
300
200
100
IN
0
0
Turn-ON Time
C
V
GATE
GS
LOW STANDBY
TTL-TO-CMOS
ATIO
CONVERTER
REGULATOR
= 2V
CURRENT
= 1000pF
5
GND
I D AGRA
SUPPLY VOLTAGE (V)
V
S
V
GS
U
= 5V
10
ANALOG SECTION
W
15
REFERENCE
W
100mV
ANALOG
A
1156 G07
REGULATORS
U
VOLTAGE
20
CE
DIGITAL
C
HARA TERISTICS
50
45
40
35
30
25
20
15
10
0
5
0
Turn-OFF Time
COMP
C
TIME FOR V
GATE
SHOT
ONE
C
= 1000pF
5
SUPPLY VOLTAGE (V)
GATE
DELAY
10 s
< 1V
10
TTL and CMOS Compatible Inputs
Each driver input has been designed to accommodate a
wide range of logic families. The input threshold is set at
1.3V with approximately 100mV of hysteresis.
S
R
LATCH
INPUT
15
1156 G08
20
50
45
40
35
30
25
20
15
10
AND DISCHARGE
CONTROL LOGIC
5
0
GATE CHARGE
AND CHARGE
OSCILLATOR
Short Circuit Turn-OFF Delay Time
0
PUMP
C
TIME FOR V
V
NO EXTERNAL DELAY
GATE
SEN
= V
= 1000pF
S
5
SUPPLY VOLTAGE (V)
– 1V
GATE
< 1V
10
GATE CHARGE
FAST/SLOW
LOGIC
15
DRAIN
SENSE
GATE
1156 BD
1156 G09
20