LTC1177-5/LTC1177-12 Isolated MOSFET Drivers U DESCRIPTIO FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ UL Recognized ® File E151738 to UL1577 No Secondary Power Supply Drives Any Logic Level FET Low Input Current: 1mA Typ (LTC1177-5), 2.5mA Typ (LTC1177-12) Turns On in 1ms Typ and Turns Off in 1ms Typ 2500VRMS of Isolation Voltage Isolates Input from High Voltage Transients at Load Clean, Bounce-Free Switching Current Limit Small Outline Package ■ ■ ■ S The LTC1177-5/LTC1177-12 are available in the 18-pin PDIP or 28-pin SW package. Solid State Relay Isolated Solenoid Driver Isolated Motor Driver Isolated Lamp Driver , LTC and LT are registered trademarks of Linear Technology Corporation. UO ■ Two lead frame capacitors are used to transfer energy from the input to drive the gate of the MOSFET and provide the necessary isolation. Unlike optoisolated FET drivers, the input current for the LTC1177-5 is only 1mA and 2.5mA for LTC1177-12. It also does not have the aging problems endemic to optocouplers. Both devices provide 2500VRMS (1 minute) or 3000VRMS (1 second) of output-to-input isolation. UO APPLICATI The LTC®1177-5/LTC1177-12 are isolated high side MOSFET drivers. When used with an external N-channel MOSFET, the LTC1177-5/LTC1177-12 form an isolated solid state switch for reliable bounce-free switching operation. The output does not require an auxiliary power supply to maintain an on-state condition. TYPICAL APPLICATI Input vs Output Isolated High Side Switch 5V OR 12V f = 50Hz 1 0V VIN GND1 18 LTC1177-5 LTC1177-12 V+ = 40V VOUT ISOLATION BARRIER + 7 47µF 50V 8 9 MTD3055EL NC NC NC GND2 OUT SENSE 12 11 10 VIN VOUT ROUT 50Ω 1177 TA02 1177 TA01 1 LTC1177-5/LTC1177-12 W W W AXI U U ABSOLUTE RATI GS Input Voltages VIN (LTC1177-5) ....................... 6V to (GND1 – 0.3V) VIN (LTC1177-12) ................ 13.2V to (GND1 – 0.3V) Sense (LTC1177-5) ................... 6V to (GND2 – 0.3V) Sense (LTC1177-12) .............. 12V to (GND2 – 0.3V) Output Voltages .......................... 12V to (GND2 – 0.3V) Operating Temperature Range Commercial ............................................. 0°C to 70°C Industrial ........................................... – 40°C to 85°C Storage Temperature Range .................. –65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C U W U PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER TOP VIEW VIN 1 18 GND1 ISOLATION BARRIER NC 7 12 NC NC 8 11 GND2 OUT 9 10 SENSE LTC1177CN-5 LTC1177CN-12 LTC1177IN-5 LTC1177IN-12 N PACKAGE 18-LEAD PDIP ISOLATION BARRIER ORDER PART NUMBER TOP VIEW NC 1 28 NC VIN 2 27 GND1 NC 3 26 NC NC 4 25 NC LTC1177CSW-5 LTC1177CSW-12 LTC1177ISW-5 LTC1177ISW-12 ISOLATION BARRIER NC 11 18 NC NC 12 17 GND2 OUT 13 16 SENSE NC 14 15 NC TJMAX = 125°C, θJA = 110°C/ W SW PACKAGE 28-LEAD PLASTIC SO WIDE ISOLATION BARRIER TJMAX = 125°C, θJA = 125°C/ W Consult factory for Military grade parts. ELECTRICAL CHARACTERISTICS VIN = 5V, TA = 25°C, unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOUT Output Voltage (Refer to GND2) COUT = 1000pF, No Load (N Pkg) COUT = 1000pF, No Load, VIN = 4.75V (N Pkg) COUT = 1000pF, No Load (SW Pkg) COUT = 1000pF, No Load, VIN = 4.75V (SW Pkg) ● ● ● ● IIN Input Current CIN = 1000pF ● ILIM Current Limit RSENSE = 1Ω (LTC1177C-5) RSENSE = 1Ω (LTC1177I-5) ● ● tON Turn-On Time COUT = 1000pF, No Load (LTC1177C-5) COUT = 1000pF, No Load (LTC1177I-5) tOFF Turn-Off Time COUT = 1000pF, No Load VISO Isolation Voltage 1 Minute (Note 1) 1 Second tCM Common Mode Slew Rate VOUT < 1.5, COUT= 1000pF 2 MIN 6.5 5.5 7.0 6.0 LTC1177-5 TYP MAX UNITS 7.5 6.5 8.0 7.0 10 10 10 10 V V V V 1.0 1.5 mA 620 620 800 900 mA mA ● ● 1.0 1.0 4.0 4.5 ms ms ● 1.0 1.8 ms 400 350 2500 3000 VRMS VRMS 1000 V/µs LTC1177-5/LTC1177-12 ELECTRICAL CHARACTERISTICS VIN = 12V, TA = 25°C unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOUT Output Voltage (Refer to GND2) COUT = 1000pF, No Load (LTC1177C-12, N Pkg) COUT = 1000pF, No Load (LTC1177C-12, SW Pkg) COUT = 1000pF, VIN = 11.4V (LTC1177C-12, N Pkg) COUT = 1000pF, VIN = 11.4V (LTC1177C-12, SW Pkg) COUT = 1000pF, No Load (LTC1177I-12, N Pkg) COUT = 1000pF, No Load (LTC1177I-12, SW Pkg) COUT = 1000pF, VIN = 11.4V (LTC1177I-12, SW Pkg) ● ● ● ● ● ● ● IIN Input Current CIN = 1000pF (LTC1177C-12) CIN = 1000pF (LTC1177I-12) ● ● ILIM Current Limit RSENSE = 1Ω (LTC1177C-12) RSENSE = 1Ω (LTC1177I-12) ● ● tON Turn-On Time COUT = 1000pF, No Load (LTC1177C-12) COUT = 1000pF, No Load (LTC1177I-12, N Pkg) COUT = 1000pF, No Load (LTC1177I-12, SW Pkg) ● COUT = 1000pF, No Load (LTC1177C-12) COUT = 1000pF, No Load (LTC1177I-12, N Pkg) COUT = 1000pF, No Load (LTC1177I-12, SW Pkg) ● tOFF Turn-Off Time VISO Isolation Voltage TCM Common Mode Slew Rate LTC1177-12 TYP MAX MIN 4.65 5.00 4.40 4.60 4.50 4.75 4.50 400 350 UNITS 5.2 5.7 4.9 5.3 5.2 5.7 5.3 8 8 7 7 8 8 7 2.5 2.5 3.0 3.4 mA mA 620 620 800 900 mA mA 1.0 1.0 1.0 2.5 ms ms ms 1.0 1.0 1.0 1.2 ● ● V V V V V V V 2.5 ms ms ms 1.5 1 Minute (Note 1) 2500 VRMS 1 Second 3000 VRMS VOUT < 1.5V, COUT= 1000pF The ● denotes specifications which apply over the full operating temperature range. 1000 V/µs Note 1: Value derived from 1 second test. U W TYPICAL PERFORMANCE CHARACTERISTICS LTC1177-5 Turn-Off Time to VOUT = 1V vs Temperature 1.6 1.8 VIN = 5V COUT = 1000pF 1.6 18 VIN = 5V COUT = 1000pF 1.2 1.0 0.8 N18, SW28 0.6 1.2 1.0 N18 0.8 SW28 0.6 14 12 10 8 N18 0.4 4 0.2 0.2 2 0 25 50 75 100 125 150 TEMPERATURE (°C) 1177-5 G01 0 –55 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 1177-5 G02 SW28 6 0.4 0 –55 –25 TA = 25°C VIN = 5V 16 1.4 TURN-ON TIME (ms) 1.4 TURN-OFF TIME (ms) LTC1177-5 Output Current vs Output Voltage OUTPUT CURRENT (µA) 1.8 LTC1177-5 Turn-On Time to VOUT = 4.5V vs Temperature 0 0 1 2 4 3 5 6 OUTPUT VOLTAGE (V) 7 8 1177-5 G03 3 LTC1177-5/LTC1177-12 U W TYPICAL PERFORMANCE CHARACTERISTICS LTC1177-5 Output Voltage vs Temperature LTC1177-5 Input Current vs Temperature 9 1.8 SW28 8 1.6 8 1.4 7 6 5 4 3 OUTPUT VOLTAGE (V) INPUT CURRENT (mA) OUTPUT VOLTAGE (V) 9 VIN = 5V 1.2 N18, SW28 1.0 0.8 0.6 5 4 3 0.4 2 1 0.2 1 0 –55 –25 25 50 75 100 125 150 TEMPERATURE (°C) 0 0 25 50 75 100 125 150 TEMPERATURE (°C) 1177-5 G04 0 1 2 4 3 5 6 INPUT VOLTAGE (V) 7 1177-5 G05 LTC1177-5 Input Current vs Input Voltage LTC1177-12 Turn-On Time to VOUT = 4.5V vs Temperature 1.6 1.2 TA = 25°C 1.6 1.1 8 1177-5 G06 LTC1177-12 Turn-Off Time to VOUT = 1V vs Temperature 1.8 VIN = 12V COUT = 1000pF VIN = 12V COUT = 1000pF 1.4 1.2 1.0 0.8 N18 SW28 0.6 TURN-ON TIME (ms) 1.4 TURN-OFF TIME (ms) INPUT CURRENT (mA) N18 6 2 VIN = 5V 0 –55 –25 0 TA = 25°C SW28 N18 7 LTC1177-5 Output Voltage vs Input Voltage 1.0 0.9 SW28 0.8 N18 1.2 N18 1.0 SW28 0.8 0.4 0.6 0.7 0.2 0 1 2 4 3 5 6 INPUT VOLTAGE (V) 7 0.6 –55 –25 8 50 25 75 0 TEMPERATURE (°C) LTC1177-12 Turn-On Time to VOUT = 4.5V vs Output Capacitance TURN-OFF TIME (ms) TURN-ON TIME (ms) SW28 0.6 1.0 SW28 0.9 0.4 10 8 SW28 6 N18 4 2 1000 1500 OUTPUT CAPACITANCE (pF) 2000 1177-12-G10 4 TA = 25°C VIN = 12V NO LOAD 12 N18 N18 1.0 125 14 TA = 25°C 1.2 100 LTC1177-12 Output Current vs Output Voltage 1.1 TA = 25°C VIN = 12V 0.2 500 50 25 75 0 TEMPERATURE (°C) 1177-12 G09 LTC1177-12 Turn-Off Time to VOUT = 1V vs Output Capacitance 1.6 0.8 0.4 –55 –25 125 1177-12 G08 1177-5 G07 1.4 100 OUTPUT CURRENT (µA) 0 0.8 500 0 1500 1000 OUTPUT CAPACITANCE (pF) 2000 1177-12 G11 0 1 4 3 2 OUTPUT VOLTAGE (V) 5 1177-12 G12 LTC1177-5/LTC1177-12 U W TYPICAL PERFORMANCE CHARACTERISTICS LTC1177-12 Input Current vs Temperature LTC1177-12 Output Voltage vs Temperature 6.4 3.0 VIN = 12V NO LOAD 6.2 VIN = 12V NO LOAD 2.8 INPUT CURRENT (mA) OUTPUT VOLTAGE (V) SW28 6.0 5.8 N18 5.6 5.4 5.2 2.6 2.4 N18 2.2 SW28 2.0 1.8 5.0 –55 –25 50 25 75 0 TEMPERATURE (°C) 100 1.6 –55 –25 125 50 25 75 0 TEMPERATURE (°C) 1177-12 G13 125 1177-12 G14 LTC1177-12 Output Voltage vs Input Voltage LTC1177-12 Input Current vs Input Voltage 8 3.4 TA = 25°C TA = 25°C 3.0 INPUT CURRENT (mA) 7 OUTPUT VOLTAGE (V) 100 SW28 6 N18 5 4 2.6 N18 SW28 2.2 1.8 3 1.4 9 10 11 12 13 INPUT VOLTAGE (V) 14 15 1177-12 G15 9 10 11 12 13 INPUT VOLTAGE (V) 14 15 1177-12 G16 U U U PIN FUNCTIONS VIN: Voltage Input, 5.25V ≥ VIN ≥ 4.75V (LTC1177-5) and 12.6V ≥ VIN ≥ 11.4V (LTC1177-12). Connect a 0.01µF capacitor between VIN and GND1 when the source impedance is high or the VIN connection is long. OUT: Output Voltage. The output voltage level is 8V (typ) for SW package and 7.5V (typ) for N package (LTC11775) with 5V at VIN pin; 5.7V (typ) for SW package and 5.2V (typ) for N package (LTC1177-12) with 12V at VIN pin. This pin is to drive the gate of the external N-channel MOSFET. SENSE: Current Limit Sense Input. Connecting a 1Ω resistor from the Sense pin to GND2 limits the current through the power MOSFET to 620mA (typ). ILIM = 620mV/RSENSE. GND2: Floating Ground Connects to the source of the external N-channel MOSFET. GND1: Input Ground. The ground connection of the input control signal. 5 LTC1177-5/LTC1177-12 W BLOCK DIAGRAM VIN ISOLATION BARRIER OSCILLATOR φ 1k CHARGE PUMP φ GND1 OUT SENSE GND2 1k 1177 BD01 U W SWITCHING WAVEFORMS 5V OR 12V VIN 2.5V OR 6V 2.5V OR 6V 0V tOFF tON 4.5V VOUT 1V 1177 SW01 0V U TYPICAL APPLICATIONS Isolated High Side Switch with Fold-Back Current Limit Solid State Relay V + = 24V AC 60Hz ISOLATION BARRIER ISOLATION BARRIER 5V OR 12V VIN OUT 0V + VIN OUT 20M LTC1177-5 LTC1177-12 GND2 1k SENSE SENSE GND1 GND1 OUT 1177 TA03 47µF 50V 100k Si9944DY LTC1177-5 LTC1177-12 MTD3055EL 0.5Ω VOUT GND2 IµF CLOAD RLOAD 1177 TA04 6 LTC1177-5/LTC1177-12 U TYPICAL APPLICATIONS Solid State Relay ISOLATION BARRIER VIN AC 60Hz OUT LTC1177-5 LTC1177-12 20M IRFR224 SENSE GND1 GND2 OUT VIN OUT LTC1177-5 LTC1177-12 SENSE GND2 GND1 1177 TA05 Fully Floating 50°F to 100°F Thermostat 7, 8 5V OR 12V 49.9k 1 1 9 4.32k 5k LTC1177-5 LTC1177-12 GND 18 10 2 3 4 11 6.81k V+ ON/OFF VIN LTC1041 SET POINT GND VP-P OSC DELTA DELTA = 0.5°F 2 8 56Ω 7 6 1, 3 10M + 10µF 26VAC 2-WIRE THERMOSTAT 4 100nF 5 Si9955DY 5, 6 1µF * 49.9Ω ALL RESISTORS 1% * YELLOW SPRINGS INSTRUMENT CO. INC. P/N 44007 DRIVING THERMISTOR WITH VP-P ELIMINATES 3.8°F 1177 TA06 SELF-HEATING ERROR 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 its circuits as described herein will not infringe on existing patent rights. 7 LTC1177-5/LTC1177-12 U PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. N Package 18-Lead PDIP Isolation Barrier (Narrow 0.300) (LTC DWG # 05-08-1590) 0.130 ± 0.005 (3.302 ± 0.127) 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) ( 0.015 (0.381) MIN 0.065 (1.651) TYP +0.025 0.325 –0.015 +0.635 8.255 –0.381 0.900* (22.860) MAX 0.045 – 0.065 (1.143 – 1.651) ) 0.005 (0.127) MIN 0.125 (3.175) MIN 18 12 11 10 1 7 8 9 0.255 ± 0.015* (6.477 ± 0.381) 0.018 ± 0.003 (0.457 ± 0.076) 0.100 ± 0.010 (2.540 ± 0.254) *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) SW Package 28-Lead Plastic Small Outline Isolation Barrier (Wide 0.300) (LTC DWG # 05-08-1690) 28 27 26 25 0.697 – 0.712* (17.70 – 18.08) 18 17 16 15 0.394 – 0.419 (10.007 – 10.643) NOTE 1 0.291 – 0.299** (7.391 – 7.595) 0.005 (0.127) RAD MIN 1 2 3 11 4 13 14 0.037 – 0.045 (0.940 – 1.143) 0.093 – 0.104 (2.362 – 2.642) 0.010 – 0.029 × 45° (0.254 – 0.737) 12 0° – 8° TYP 0.009 – 0.013 (0.229 – 0.330) NOTE 1 0.016 – 0.050 (0.406 – 1.270) 0.050 (1.270) TYP 0.014 – 0.019 (0.356 – 0.482) 0.004 – 0.012 (0.102 – 0.305) NOTE: 1. 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. *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE RELATED PARTS PART NUMBER DESCRIPTION LTC1145/LTC1146 Low Power Digital Isolator COMMENTS Passes Digital Information Across Isolation Barrier LT®1158 Half-Bridge N-Channel Power MOSFET Driver Useful for Motor Speed Control, Synchronous Switching Regulator LTC1255 Dual 24V High Side MOSFET Driver User Set Current Limiting 8 Linear Technology Corporation LT/GP 1195 10K • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977 LINEAR TECHNOLOGY CORPORATION 1995