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LTC1157CS8#TRPBF

P1-P3P4-P6P7-P8
1
LTC1157
3.3V Dual Micropower
High-Side/Low-Side MOSFET Driver
The LTC1157 dual 3.3V micropower MOSFET gate driver
makes it possible to switch either supply or ground
reference loads through a low R
DS(ON)
N-channel switch
(N-channel switches are required at 3.3V because P-
channel MOSFETs do not have guaranteed R
DS(ON)
with
V
GS
≤ 3.3V). The LTC1157 internal charge pump boosts
the gate drive voltage 5.4V above the positive rail (8.7V
above ground), fully enhancing a logic level N-channel
switch for 3.3V high-side applications and a standard N-
channel switch for 3.3V low-side applications. The gate
drive voltage at 5V is typically 8.8V above supply (13.8V
above ground), so standard N-channel MOSFET switches
can be used for both high-side and low-side applications.
Micropower operation, with 3µA standby current and
80µA operating current, makes the LTC1157 well suited
for battery-powered applications.
The LTC1157 is available in both 8-pin DIP and SOIC.
S
F
EA
T
U
RE
■
Allows Lowest Drop 3.3V Supply Switching
■
Operates on 3.3V or 5V Nominal Supplies
■
3 Microamps Standby Current
■
80 Microamps ON Current
■
Drives Low Cost N-Channel Power MOSFETs
■
No External Charge Pump Components
■
Controlled Switching ON and OFF Times
■
Compatible with 3.3V and 5V Logic Families
■
Available in 8-Pin SOIC
U
S
A
O
PP
L
IC
AT
I
■
Notebook Computer Power Management
■
Palmtop Computer Power Management
■
P-Channel Switch Replacement
■
Battery Charging and Management
■
Mixed 5V and 3.3V Supply Switching
■
Stepper Motor and DC Motor Control
■
Cellular Telephones and Beepers
D
U
ESCRIPTIO
U
A
O
PP
L
IC
AT
ITY
P
I
CA
L
+
V
S
GND
G2
G1
IN2
IN1
LTC1157
3.3V
LOGIC
(8.7V)
(8.7V)
IRLR024
IRLR024
3.3V
LOAD
3.3V
LOAD
10µF
3.3V
LTC1157 • TA01
Ultra Low Voltage Drop 3.3V Dual High-Side Switch Gate Voltage Above Supply
SUPPLY VOLTAGE (V)
2.0
0
GATE VOLTAGE – SUPPLY VOLTAGE (V)
2
4
6
8
3.0 4.0
5.0
6.0
LTC1157 • TA02
10
12
2.5 3.5 4.5
5.5
2
LTC1157
LTC1157C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
Q
Quiescent Current OFF V
S
= 3.3V, V
IN1
= V
IN2
= 0V (Note 1) 3 10 µA
Quiescent Current ON V
S
= 3.3V, V
IN
= 3.3V (Note 2) 80 160 µA
V
S
= 5V, V
IN
= 5V (Note 2) 180 400 µA
V
INH
Input High Voltage ● 70% × V
S
V
V
INL
Input Low Voltage ● 15% × V
S
V
I
IN
Input Current 0V ≤ V
IN
≤ V
S
● ±1 µA
C
IN
Input Capacitance 5pF
V
GATE
– V
S
Gate Voltage Above Supply V
S
= 3V ● 4.0 4.7 6.5 V
V
S
= 3.3V ● 4.5 5.4 7.0 V
V
S
= 5V ● 7.5 8.8 12.0 V
t
ON
Turn-ON Time V
S
= 3.3V, C
GATE
= 1000pF
Time for V
GATE
> V
S
+ 1V 30 130 300 µs
Time for V
GATE
> V
S
+ 2V 75 240 750 µs
V
S
= 5V, C
GATE
= 1000pF
Time for V
GATE
> V
S
+ 1V 30 85 300 µs
Time for V
GATE
> V
S
+ 2V 75 230 750 µs
t
OFF
Turn-OFF Time V
S
= 3.3V, C
GATE
= 1000pF
Time for V
GATE
< 0.5V 10 36 60 µs
V
S
= 5V, C
GATE
= 1000pF
Time for V
GATE
< 0.5V 10 31 60 µs
Supply Voltage ........................................... –0.3V to 7V
Any Input Voltage ............. (V
S
+ 0.3V) to (GND – 0.3V)
Any Output Voltage............. (V
S
+ 12V) to (GND – 0.3V)
Current (Any Pin)................................................. 50mA
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
Operating Temperature Range
LTC1157C............................................... 0°C to 70°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART
NUMBER
LTC1157CN8
ORDER PART
NUMBER
T
JMAX
= 100°C,
θ
JA
= 130°C/ W
LTC1157CS8
T
JMAX
= 100°C,
θ
JA
= 150°C/W
E
LECTR
IC
AL C CHARA TERIST
ICS
V
S
= 2.7V to 5.5V, T
A
= 25°C, unless otherwise noted.
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: Quiescent current OFF is for both channels in OFF condition.
Note 2: Quiescent current ON is per driver and is measured independently.
S8 PART MARKING
1157
1
2
3
4
8
7
6
5
TOP VIEW
NC
GATE 1
GND
IN1
NC
GATE 2
V
S
IN2
N8 PACKAGE
8-LEAD PLASTIC DIP
1
2
3
4
8
7
6
5
TOP VIEW
NC
GATE 2
V
S
IN2
NC
GATE 1
GND
IN1
S8 PACKAGE
8-LEAD PLASTIC SO
3
LTC1157
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
Standby Supply Current
Turn-OFF TimeInput Threshold Voltage
Standby Supply Current
Supply Current per Driver ON
Gate Drive Current
Gate Voltage Above SupplySupply Current per Driver ON
SUPPLY VOLTAGE (V)
2.0
0
SUPPLY CURRENT (µA)
2
4
6
8
3.0 4.0
5.0
6.0
LTC1157 • TPC01
10
12
2.5 3.5 4.5
5.5
V
IN1
= V
IN2
= 0V
T
A
= 25°C
SUPPLY VOLTAGE (V)
2.0
0
SUPPLY CURRENT (µA)
100
200
300
400
3.0 4.0
5.0
6.0
LTC1157 • TPC02
500
600
2.5 3.5 4.5
5.5
ONE INPUT = ON
OTHER INPUT = OFF
T
A
= 25°C
Turn-ON Time
TEMPERATURE (˚C)
0
SUPPLY CURRENT (µA)
8
10
12
30 50
LTC1157 • TPC07
6
4
10 20
40 60 70
2
0
V
S
= 5V
V
S
= 3.3V
TEMPERATURE (˚C)
0
SUPPLY CURRENT (µA)
200
250
300
30 50
LTC1157 • TPC08
150
100
10 20
40 60 70
50
0
V
S
= 5V
V
S
= 3.3V
SUPPLY VOLTAGE (V)
2.0
0
GATE VOLTAGE – SUPPLY VOLTAGE (V)
2
4
6
8
3.0 4.0
5.0
6.0
LTC1157 • TPC03
10
12
2.5 3.5 4.5
5.5
SUPPLY VOLTAGE (V)
2.0
0
TURN-OFF TIME (µs)
10
20
30
40
3.0 4.0
5.0
6.0
LTC1157 • TPC06
50
60
2.5 3.5 4.5
5.5
C
GATE
= 1000pF
TIME FOR V
GATE
< 0.5V
SUPPLY VOLTAGE (V)
2.0
0
INPUT THRESHOLD VOLTAGE (V)
0.5
1.0
1.5
2.0
3.0 4.0
5.0
6.0
LTC1157 • TPC04
2.5
3.0
2.5 3.5 4.5
5.5
T
A
= 25°C
GATE VOLTAGE ABOVE SUPPLY (V)
1
GATE DRIVE CURRENT (µA)
10
100
1000
0468
0.1
2
10
LTC1157 • TPC09
V
S
= 5V
V
S
= 3.3V
T
A
= 25°C
SUPPLY VOLTAGE (V)
2.0
0
TURN-ON TIME (µs)
200
300
400
600
3.0 4.0
5.0
6.0
LTC1157 • TPC05
800
1000
2.5 3.5 4.5
5.5
V
GS
= 5VV
GS
= 2V
V
GS
= 1V
C
GATE
= 1000pF
P1-P3P4-P6P7-P8

LTC1157CS8#TRPBF

Mfr. #:
Buy LTC1157CS8#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Gate Drivers 3.3V 2x uP Hi-Side/L-Side MOSFET Drvr
Lifecycle:
New from this manufacturer.
Delivery:
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