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