LINER LTC1156CS

LTC1156
Quad High Side
Micropower MOSFET Driver
with Internal Charge Pump
DESCRIPTIO
U
FEATURES
■
■
■
■
■
■
■
■
■
No External Charge Pump Components
Fully Enhances N-Channel Power MOSFETs
16 Microamps Standby Current
95 Microamps ON Current
Wide Power Supply Range 4.5V to 18V
Controlled Switching ON and OFF Times
Replaces P-Channel High Side Switches
Compatible with Standard Logic Families
Available in 16-pin SOL Package
UO
APPLICATI
■
■
■
■
■
■
■
S
Laptop Computer Power Switching
SCSI Termination Power Switching
Cellular Telephone Power Management
P-Channel Switch Replacement
Battery Charging and Management
Low Frequency H-Bridge Driver
Stepper Motor and DC Motor Control
The LTC1156 quad High side gate driver allows using low
cost N-channel FETs for high side switching applications.
An internal charge pump boosts the gate drive voltage
above the positive rail, fully enhancing an N-channel MOS
switch with no external components. Micropower operation, with 16µA standby current and 95µA operating
current, allows use in virtually all systems with maximum
efficiency.
Included on chip is independent over-current sensing to
provide automatic shutdown in case of short circuits. A
time delay can be added to the current sense to prevent
false triggering on high in-rush current loads.
The LTC1156 operates off of a 4.5V to 18V supply and is
well suited for battery-powered applications, particularly
where micropower “sleep” operation is required.
The LTC1156 is available in both 16-pin DIP and 16-pin
SOL packages.
UO
TYPICAL APPLICATI
Laptop Computer Power Management
Standby Supply Current
5V
100
+
0.1µF
10µF
100k
VS
5V
DS1
DS2
DS3
DS4
Si9956DY
80
SUPPLY CURRENT (µA)
VS
HARD DISK
DRIVE
LTC1156
CONTROL
LOGIC
OR µP
IN1
G1
IN2
G2
IN3
G3
IN4
G4
GND GND
VIN1 = VIN2 = VIN3 = VIN4 = 0V
TJ = 25°C
90
*30mΩ
FLOPPY DISK
DRIVE
70
60
50
40
30
20
10
Si9956DY
DISPLAY
0
0
PERIPHERAL
ALL COMPONENTS SHOWN ARE SURFACE MOUNT. MINIMUM PARTS COUNT
SHOWN. CURRENT LIMITS CAN BE SET SEPARATELY AND TAILORED TO
INDIVIDUAL LOAD CHARACTERISTICS.
* IMS026 INTERNATIONAL MANUFACTURING SERVICES, INC. (401) 683-9700
5
15
10
SUPPLY VOLTAGE (V)
20
LTC1156 G01
1156 TA01
1
LTC1156
W W
W
AXI U
U
ABSOLUTE
RATI GS
Supply Voltage ....................................................... 22V
Input Voltage ..................... (VS + 0.3V) to (GND – 0.3V)
Gate Voltage ....................... (VS + 24V) to (GND – 0.3V)
Current (Any Pin)................................................. 50mA
Operating Temperature Range
LTC1156C ............................................. 0°C to 70°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................. 300°C
U
W
U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
GND
1
16 G1
IN1
2
15 DS1
VS
3
14 G2
IN2
4
IN3
ORDER PART
NUMBER
ORDER PART
NUMBER
TOP VIEW
GND 1
16 G1
IN1 2
15 DS1
VS 3
14 G2
13 DS2
IN2 4
13 DS2
5
12 DS3
IN3 5
12 DS3
GND
6
11 G3
GND 6
11 G3
IN4
7
10 DS4
IN4 7
10 DS4
VS
8
9
LTC1156CN
G4
9
VS 8
LTC1156CS
G4
S PACKAGE
16-LEAD PLASTIC SOL
N PACKAGE
16-LEAD PLASTIC DIP
TJMAX = 110°C, θJA = 120°C/W
TJMAX = 110°C, θJA = 130°C/W
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
VS = 4.5V to 18V, TA = 25°C, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
VS
Supply Voltage
(Note 1)
IQ
Quiescent Current OFF
VS = 5V, VIN = 0V (Note 2)
IQ
Quiescent Current ON
IQ
Quiescent Current ON
VINH
Input High Voltage
●
VINL
Input Low Voltage
●
0.8
V
IIN
Input Current
●
±1.0
µA
CIN
Input Capacitance
VSEN
Drain Sense Threshold
Voltage
ISEN
UNITS
16
40
µA
VS = 5V, VIN = 5V (Note 3)
95
125
µA
VS = 12V, VIN = 5V (Note 3)
180
400
µA
0V < VIN < VS
4.5
MAX
V
2.0
V
5
●
●
VGATE – VS Gate Voltage Above Supply
VS = 5V
VS = 6V
VS = 12V
●
●
●
t ON
VS = 5V, CGATE = 1000pF
Time for VGATE > VS + 2V
Time for VGATE > VS + 5V
VS = 12V, CGATE = 1000pF
Time for VGATE > VS + 5V
Time for VGATE > VS + 10V
Turn-ON Time
TYP
18
●
0V < VSEN < VS
2
Drain Sense Input Current
MIN
80
75
100
100
pF
120
125
mV
mV
±0.1
µA
6.0
7.5
15
7.0
8.3
18
9.0
15.0
25
V
V
V
50
200
250
1100
750
2000
µs
µs
50
120
180
450
500
1200
µs
µs
LTC1156
ELECTRICAL CHARACTERISTICS
VS = 4.5V to 18V, TA = 25°C, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
t OFF
Turn-OFF Time
VS = 5V, CGATE = 1000pF
Time for VGATE < 1V
VS = 12V, CGATE = 1000pF
Time for VGATE < 1V
t SC
Short Circuit Turn-OFF Time
VS = 5V, CGATE = 1000pF
Time for VGATE < 1V
VS = 12V, CGATE = 1000pF
Time for VGATE < 1V
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: Both VS pins (3 and 8) must be connected together, and both
ground pins (1 and 6) must be connected together.
MIN
TYP
MAX
UNITS
10
36
60
µs
10
26
60
µs
5
16
30
µs
5
16
30
µs
Note 2: Quiescent current OFF is for all channels in OFF condition.
Note 3: Quiescent current ON is per driver and is measured independently.
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Standby Supply Current
1000
VIN1 = VIN2 = VIN3 = VIN4 = 0V
TJ = 25°C
90
ONE INPUT = ON
OTHER INPUTS = OFF
TJ = 25°C
800
70
60
50
40
30
22
20
700
18
VGATE – VS (V)
SUPPLY CURRENT (µA)
SUPPLY CURRENT (µA)
24
900
80
600
500
400
16
14
12
300
10
20
200
8
10
100
6
0
0
4
0
5
15
10
SUPPLY VOLTAGE (V)
20
0
5
15
10
SUPPLY VOLTAGE (V)
LTC1156 G01
900
80
SUPPLY CURRENT (µA)
50
40
VS = 18V
30
20
ONE INPUT = ON
OTHER INPUTS = OFF
27
24
700
21
600
18
500
400
VS = 18V
300
25
50
25
0
75
TEMPERATURE (°C)
100
125
1156 G04
0
–50
25
50
25
0
75
TEMPERATURE (°C)
12
6
VS = 5V
100
VS = 5V
15
9
200
10
20
30
800
60
15
10
SUPPLY VOLTAGE (V)
Low Side Gate Voltage
Supply Current per Channel ON
70
5
LTC1156 G03
1000
VIN1 = VIN2 = VIN3 = VIN4 = 0V
0
–50
0
VGATE (V)
90
20
1156 G02
Standby Supply Current
100
SUPPLY CURRENT (µA)
High Side Gate Voltage
Supply Current per Channel ON
100
3
100
125
1156 G05
0
0
2
6
8
4
SUPPLY VOLTAGE (V)
10
1158 G06
3
LTC1156
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Turn-OFF Time
Turn-ON Time
1000
CGATE = 1000pF
900
CGATE = 1000pF
TIME FOR VGATE < 1V
45
800
40
500
VGS = 5V
400
300
200
VGS = 2V
100
0
0
TURN-OFF TIME (µs)
700
600
35
30
25
20
15
15
10
SUPPLY VOLTAGE (V)
20
35
30
25
20
15
10
10
5
5
0
0
5
CGATE = 1000pF
TIME FOR VGATE < 1V
VSEN = VS – 1V
NO EXTERNAL DELAY
45
40
TURN-OFF TIME (µs)
TURN-ON TIME (µs)
Short Circuit Turn-OFF Delay Time
50
50
0
5
15
10
SUPPLY VOLTAGE (V)
1156 G07
20
0
5
15
10
SUPPLY VOLTAGE (V)
20
1156 G09
1156 G08
W
BLOCK DIAGRA
VS
ANALOG SECTION
DRAIN
SENSE
100mV
REFERENCE
COMP
LOW STANDBY
CURRENT
REGULATOR
ANALOG
10µs
DELAY
GATE CHARGE
AND DISCHARGE
CONTROL LOGIC
DIGITAL
GATE
R
IN
TTL-TO-CMOS
CONVERTER
VOLTAGE
REGULATORS
ONE
SHOT
INPUT
LATCH
S
OSCILLATOR
AND CHARGE
PUMP
GND
FAST/SLOW
GATE CHARGE
LOGIC
1156 BD
U
OPERATIO
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
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.
LTC1156
U
OPERATIO
A voltage regulator with low standby current provides
continuous bias for the TTL to CMOS converters. The TTL
to CMOS converter output enables the rest of the circuitry.
In this way the power consumption is kept to a minimum
in the standby mode.
Drain Current Sense
The LTC1156 is configured to sense the drain current of
the power MOSFET in high side applications. An internal
100mV reference is compared to the drop across a sense
resistor (typically 0.002Ω to 0.1Ω) in series with the drain
lead. If the drop across this resistor exceeds the internal
100mV threshold, the input latch is reset and the gate is
quickly discharged by a large N-channel transistor. A
simple RC network can be added to delay the over-current
protection so that large in-rush current loads such as
lamps or capacitors can be started.
Internal Voltage Regulation
The output of the TTL to CMOS converter drives two
regulated supplies which power the low voltage CMOS
logic and analog blocks. The regulator outputs are isolated
from each other so that the noise generated by the charge
pump logic is not coupled into the 100mV reference or the
analog comparator.
Supply and Ground Pins
The two supply pins (3 and 8) of the LTC1156 must be
connected together at all times and the two ground pins (1
and 6) must be connected together at all times. The two
supply pins should be connected to the “top” of the drain
current sense resistor/s to ensure accurate sensing.
Gate Charge Pump
Gate drive for the power MOSFET is produced by an
adaptive charge pump circuit which generates a gate
voltage substantially higher than the power supply voltage. The charge pump capacitors are included on chip and
therefore no external components are required to generate
the gate drive.
For further applications information, see the LTC1155
Dual High Side Micropower MOSFET Driver data sheet.
UO
TYPICAL APPLICATI
S
4-Cell Extremely Low Voltage Drop Regulator and Three Load
Switches with Short-Circuit Protection and 20µA Standby Current
5.2V TO 6V
4-CELL NiCd
BATTERY PACK
+
+
47µF
**0.03Ω
0.1µF
DS2
DS3
DS4
VS
3.3A MAX
100k
VS
DS1
100k
G1
IRLR024
5V/2A
SWITCHED
0.1µF
REG ON/OFF
CONTROL
LOGIC
FAULT
IN1
LTC1156
IN2
G2
IN3
G3
IN4
G4
2 × Si9956DY
200pF
GND GND
1
10k
1N4148
7
* CAPACITOR ESR LESS THAN 0.5Ω
** RCS02 ULTRONIX (303) 242-0810
3
8
LT1431
5V
LOAD
4
5V
LOAD
5V
LOAD
+
6
5
*470µF
1156 TA02
5
LTC1156
UO
TYPICAL APPLICATI
S
24V to 30V Quad Industrial Switch with Thermal Shutdown
24V – 30V
+
1N4746
18V
+
10µF
50V
1µF
25V
2k
VS
RT1*
100°C
VS
DS1
DS2
DS3
DS4
5V
IRF530
240k
IRF530
LTC1156
CONTROL
LOGIC
OR µP
IN1
G1
IN2
G2
IN3
G3
G4
IN4
M
IRF530
IRF530
GND GND
1156 TA03
* KEYSTONE RL2006-100-100-30-PT MOUNT ON HEATSINK.
Automotive Triple High Side Switch with Reverse Battery Interrupt, Short-Circuit
and High-Voltage Transient Protection (20µA Standby Current)
6V – 16V
+
10µF
18V
1N4746
100k
0.1µF
1N4148
15V
1N5245A
IRFZ44
150Ω
200k
VS VS DS1 G1
3 × IRFZ24
DS2
100k
IN1
30k
G2
100k
IN2
INPUT 1
LTC1156
DS3
24V
1N5252A
OUTPUT 1
24V
1N5252A
OUTPUT 2
24V
1N5252A
OUTPUT 3
30k
100k
G3
IN3
INPUT 2
DS4
100k
IN4
INPUT 3
3 × 0.1µF
30k
GND GND
G4
150Ω
1/2W
1156 TA04
6
LTC1156
UO
TYPICAL APPLICATI
S
4-Phase Stepper Motor Driver with Short-Circuit Protection
6V
+
0.05Ω
0.01µF
10µF
2A MAX
30k
VS
VS
5V
DS1
DS2
DS3
DS4
1N4001
A
Si9956DY
1N4001
LTC1156
CONTROL
LOGIC
IN1
G1
IN2
G2
IN3
G3
IN4
G4
GND GND
B
1N4001
C
Si9956DY
1N4001
D
* STR101G TECHNO (818) 781-1642
1156 TA05
Full H-Bridge Driver with Short-Circuit Protection and 16µA Standby Current
Low Frequency Operation (<100Hz)
5V
+
0.1µF
10µF
0.1µF
0.05Ω
0.05Ω
100k
VS
IN1
**
CONTROL
LOGIC
OR µP
VS
DS1
DS2
DS3
DS4
100k
Si9956DY
Si9956DY
LTC1156
IN2
G1
IN3
G2
LOAD
G3
IN4
GND GND
G4
* STR101G TECHNO (818) 781-1642
** SOFTWARE (OR HARDWARE) DELAYS SHOULD BE PROVIDED TO AVOID
CROSS-CONDUCTION. ALL COMPONENTS SHOWN ARE SURFACE MOUNT.
1156 TA06
For more Typical Applications, see LTC1155 data sheet.
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of circuits as described herein will not infringe on existing patent rights.
7
LTC1156
U
PACKAGE DESCRIPTIO
Dimesions in inches (millimeters) unless otherwise noted.
N Package
16-Lead Plastic DIP
0.300 – 0.325
(7.620 – 8.255)
0.009 – 0.015
(0.229 – 0.381)
0.130 ± 0.005
(3.302 ± 0.127)
0.015
(0.381)
MIN
+0.025
0.325 –0.015
(
8.255
0.065
(1.651)
TYP
0.125
(3.175)
MIN
)
+0.635
–0.381
0.770
(19.558)
0.045 – 0.065
(1.143 – 1.651)
0.045 ± 0.015
(1.143 ± 0.381)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
0.260 ± 0.010
(6.604 ± 0.254)
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
N16 1291
S Package
16-Lead Plastic SOL
0.398 – 0.413
(10.109 – 10.490)
0.291 – 0.299
(7.391 – 7.595)
0.005
(0.127)
RAD MIN
0.093 – 0.104
(2.362 – 2.642)
0.010 – 0.029 × 45°
(0.254 – 0.737)
0.037 – 0.045
(0.940 – 1.143)
16
15
14
13
12
11
10
9
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
SEE NOTE
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
TYP
0.004 – 0.012
(0.102 – 0.305)
0.394 – 0.419
(10.008 – 10.643)
SEE NOTE
0.014 – 0.019
(0.356 – 0.483)
TYP
NOTE:
PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS.
1
2
3
4
5
6
7
8
SOL16 12/91
8
Linear Technology Corporation
LT/GP 0694 5K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977
 LINEAR TECHNOLOGY CORPORATION 1994