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LTC1177-5/LTC1177-12
FOR INFORMATION PURPOSES ONLY
OBSOLETE:
Isolated MOSFET Drivers DESCRIPTIO
Contact Linear Technology for Potential Replacement
I
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I I I I I I
UL Recognized (R) 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
The LTC(R)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. 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. The LTC1177-5/LTC1177-12 are available in the 18-pin PDIP or 28-pin SW package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
I I I I
Solid State Relay Isolated Solenoid Driver Isolated Motor Driver Isolated Lamp Driver
Isolated High Side Switch
5V OR 12V 0V V+ = 40V f = 50Hz 1 VIN GND1 LTC1177-5 LTC1177-12 ISOLATION BARRIER 7 8 9 NC NC OUT NC GND2 SENSE 12 11 10
VIN VOUT
+
47F 50V MTD3055EL
ROUT 50
1177 TA01
UO
TYPICAL APPLICATI
UO
APPLICATI
S
18
VOUT
1177 TA02
U
Input vs Output
FEATURES
1
LTC1177-5/LTC1177-12 ABSOLUTE AXI U RATI GS
Operating Temperature Range Commercial ............................................. 0C to 70C Industrial ........................................... - 40C to 85C Storage Temperature Range ..................-65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C 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)
PACKAGE/ORDER I FOR ATIO
ORDER PART NUMBER
TOP VIEW VIN 1 ISOLATION BARRIER 18 GND1
LTC1177CN-5 LTC1177CN-12 LTC1177IN-5 LTC1177IN-12
NC NC OUT
7 8 9
12 NC 11 GND2 10 SENSE NC 11 NC 12 OUT 13 NC 14 18 NC 17 GND2 16 SENSE 15 NC
N PACKAGE 18-LEAD PDIP ISOLATION BARRIER TJMAX = 125C, JA = 110C/ W
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL VOUT PARAMETER Output Voltage (Refer to GND2)
VIN = 5V, TA = 25C, unless otherwise noted.
MIN
q q q q q q q q q q
CONDITIONS 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) CIN = 1000pF RSENSE = 1 (LTC1177C-5) RSENSE = 1 (LTC1177I-5) COUT = 1000pF, No Load (LTC1177C-5) COUT = 1000pF, No Load (LTC1177I-5) COUT = 1000pF, No Load 1 Minute (Note 1) 1 Second VOUT < 1.5, COUT= 1000pF
IIN ILIM tON tOFF VISO tCM
Input Current Current Limit Turn-On Time Turn-Off Time Isolation Voltage Common Mode Slew Rate
2
U
U
W
WW
U
W
TOP VIEW NC VIN NC NC 1 2 3 4 ISOLATION BARRIER 28 NC 27 GND1 26 NC 25 NC
ORDER PART NUMBER LTC1177CSW-5 LTC1177CSW-12 LTC1177ISW-5 LTC1177ISW-12
SW PACKAGE 28-LEAD PLASTIC SO WIDE ISOLATION BARRIER TJMAX = 125C, JA = 125C/ W
LTC1177-5 TYP 7.5 6.5 8.0 7.0 1.0 620 620 1.0 1.0 1.0
MAX 10 10 10 10 1.5 800 900 4.0 4.5 1.8
UNITS V V V V mA mA mA ms ms ms VRMS VRMS
6.5 5.5 7.0 6.0 400 350
2500 3000 1000
V/s
LTC1177-5/LTC1177-12
ELECTRICAL CHARACTERISTICS
SYMBOL VOUT PARAMETER Output Voltage (Refer to GND2) CONDITIONS
VIN = 12V, TA = 25C unless otherwise noted.
MIN
q q q q q q q q q q q q q q q
LTC1177-12 TYP MAX 5.2 5.7 4.9 5.3 5.2 5.7 5.3 2.5 2.5 8 8 7 7 8 8 7 3.0 3.4 800 900 2.5 2.5 1.2 1.5
UNITS V V V V V V V mA mA mA mA ms ms ms ms ms ms VRMS VRMS
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) CIN = 1000pF (LTC1177C-12) CIN = 1000pF (LTC1177I-12) RSENSE = 1 (LTC1177C-12) RSENSE = 1 (LTC1177I-12) 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) 1 Minute (Note 1) 1 Second VOUT < 1.5V, COUT= 1000pF
4.65 5.00 4.40 4.60 4.50 4.75 4.50
IIN ILIM tON
Input Current Current Limit Turn-On Time
400 350
620 620 1.0 1.0 1.0 1.0 1.0 1.0
tOFF
Turn-Off Time
VISO TCM
Isolation Voltage Common Mode Slew Rate
2500 3000 1000 Note 1: Value derived from 1 second test.
V/s
The q denotes specifications which apply over the full operating temperature range.
TYPICAL PERFORMANCE CHARACTERISTICS
LTC1177-5 Turn-Off Time to VOUT = 1V vs Temperature
1.8 1.6 1.4 VIN = 5V COUT = 1000pF 1.8 1.6 1.4 VIN = 5V COUT = 1000pF
1.2 1.0 0.8 N18, SW28 0.6 0.4 0.2 0 -55 -25 0 25 50 75 100 125 150 TEMPERATURE (C)
1177-5 G01
1.2 1.0 N18 0.8 0.6 0.4 0.2 0 -55 -25 0 25 50 75 100 125 150 TEMPERATURE (C)
1177-5 G02
OUTPUT CURRENT (A)
TURN-OFF TIME (ms)
TURN-ON TIME (ms)
UW
LTC1177-5 Turn-On Time to VOUT = 4.5V vs Temperature
18 16 14 12 10 8 6
LTC1177-5 Output Current vs Output Voltage
TA = 25C VIN = 5V
SW28
SW28 N18
4 2 0 0 1 2 4 3 5 6 OUTPUT VOLTAGE (V) 7 8
1177-5 G03
3
LTC1177-5/LTC1177-12 TYPICAL PERFORMANCE CHARACTERISTICS
LTC1177-5 Output Voltage vs Temperature
9 SW28 8
INPUT CURRENT (mA)
7
OUTPUT VOLTAGE (V)
N18
OUTPUT VOLTAGE (V)
6 5 4 3 2 1 VIN = 5V 0 -55 -25 0 25 50 75 100 125 150 TEMPERATURE (C)
1177-5 G04
LTC1177-5 Input Current vs Input Voltage
1.8 TA = 25C 1.6
1.1
INPUT CURRENT (mA)
1.4
TURN-OFF TIME (ms)
1.2 1.0 0.8 0.6 0.4 N18 SW28
1.0 0.9 SW28 0.8 N18 0.7
TURN-ON TIME (ms)
0.2 0 0 1 2 4 3 5 6 INPUT VOLTAGE (V) 7 8
0.6 -55 -25 50 25 75 0 TEMPERATURE (C) 100 125 0.4 -55 -25 50 25 75 0 TEMPERATURE (C) 100 125
LTC1177-12 Turn-On Time to VOUT = 4.5V vs Output Capacitance
1.6 1.4
TURN-ON TIME (ms)
TA = 25C VIN = 12V N18
TURN-OFF TIME (ms)
1.2 1.0 0.8 0.6 0.4 0.2 500 SW28
OUTPUT CURRENT (A)
1000 1500 OUTPUT CAPACITANCE (pF)
4
UW
1177-5 G07
1177-12-G10
LTC1177-5 Input Current vs Temperature
1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 -55 -25 0 25 50 75 100 125 150 TEMPERATURE (C)
1177-5 G05
LTC1177-5 Output Voltage vs Input Voltage
9 8 SW28 7 N18 6 5 4 3 2 1 0 0 1 2 4 3 5 6 INPUT VOLTAGE (V) 7 8 TA = 25C
VIN = 5V
N18, SW28
1177-5 G06
LTC1177-12 Turn-Off Time to VOUT = 1V vs Temperature
1.2 VIN = 12V COUT = 1000pF 1.6 1.4 1.2
LTC1177-12 Turn-On Time to VOUT = 4.5V vs Temperature
VIN = 12V COUT = 1000pF
N18 1.0 SW28 0.8 0.6
1177-12 G08
1177-12 G09
LTC1177-12 Turn-Off Time to VOUT = 1V vs Output Capacitance
1.1 TA = 25C N18 1.0 SW28
LTC1177-12 Output Current vs Output Voltage
14 12 10 8 SW28 6 N18 4 2 TA = 25C VIN = 12V NO LOAD
0.9
2000
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 TYPICAL PERFORMANCE CHARACTERISTICS
LTC1177-12 Output Voltage vs Temperature
6.4 6.2 OUTPUT VOLTAGE (V) 6.0 5.8 N18 5.6 5.4 5.2 5.0 -55 -25 VIN = 12V NO LOAD SW28 INPUT CURRENT (mA) 2.6 2.4 2.2 SW28 2.0 1.8 1.6 -55 -25 N18 3.0 2.8 VIN = 12V NO LOAD
LTC1177-12 Output Voltage vs Input Voltage
8 TA = 25C 7 SW28 6 N18 5 INPUT CURRENT (mA) OUTPUT VOLTAGE (V) 3.0 3.4
4
3 9 10 11 12 13 INPUT VOLTAGE (V) 14 15
PIN FUNCTIONS
VIN: Voltage Input, 5.25V VIN 4.75V (LTC1177-5) and 12.6V VIN 11.4V (LTC1177-12). Connect a 0.01F 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 1 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.
UW
LTC1177-12 Input Current vs Temperature
50 25 75 0 TEMPERATURE (C)
100
125
50 25 75 0 TEMPERATURE (C)
100
125
1177-12 G13
1177-12 G14
LTC1177-12 Input Current vs Input Voltage
TA = 25C
2.6 N18 2.2 SW28
1.8
1.4 9 10 11 12 13 INPUT VOLTAGE (V) 14 15
1177-12 G15
1177-12 G16
U
U
U
5
LTC1177-5/LTC1177-12
BLOCK DIAGRAM
SWITCHING WAVEFORMS
5V OR 12V VIN 0V tON 4.5V VOUT 1V 0V
1177 SW01
2.5V OR 6V
TYPICAL APPLICATIONS
Solid State Relay
AC 60Hz ISOLATION BARRIER
VIN
OUT 20M Si9944DY LTC1177-5 LTC1177-12
SENSE GND1 GND2 OUT
1177 TA03
6
W
U
W
VIN ISOLATION BARRIER OSCILLATOR CHARGE PUMP GND2 1k 1k OUT SENSE GND1
1177 BD01
U
2.5V OR 6V
tOFF
Isolated High Side Switch with Fold-Back Current Limit
V + = 24V ISOLATION BARRIER 5V OR 12V 0V
+
VIN OUT MTD3055EL
47F 50V
100k LTC1177-5 LTC1177-12 1k 0.5 VOUT IF CLOAD RLOAD
1177 TA04
SENSE GND1 GND2
LTC1177-5/LTC1177-12 TYPICAL APPLICATIONS
Solid State Relay
ISOLATION BARRIER VIN OUT AC 60Hz
5V OR 12V 1 LTC1177-5 LTC1177-12 GND 18 10 11 9
49.9k 1 4.32k 5k 2 3 4 6.81k ON/OFF VIN V+ VP-P OSC DELTA 8 7 6 5 Si9955DY 1F ALL RESISTORS 1% * YELLOW SPRINGS INSTRUMENT CO. INC. P/N 44007 DRIVING THERMISTOR WITH VP-P ELIMINATES 3.8F 1177 TA06 SELF-HEATING ERROR 5, 6 2 56 10M 1, 3 26VAC 2-WIRE THERMOSTAT 100nF
* 49.9
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.
U
LTC1177-5 LTC1177-12
20M IRFR224
SENSE GND1 VIN GND2 OUT OUT
LTC1177-5 LTC1177-12
SENSE GND1 GND2
1177 TA05
Fully Floating 50F to 100F Thermostat
7, 8
LTC1041
+
10F
SET POINT GND
4
DELTA = 0.5F
7
LTC1177-5/LTC1177-12
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
N Package 18-Lead PDIP Isolation Barrier (Narrow 0.300)
(LTC DWG # 05-08-1590)
0.300 - 0.325 (7.620 - 8.255) 0.130 0.005 (3.302 0.127) 0.015 (0.381) MIN 0.045 - 0.065 (1.143 - 1.651) 0.900* (22.860) MAX 18 12 11 10
0.009 - 0.015 (0.229 - 0.381)
(
+0.025 0.325 -0.015 +0.635 8.255 -0.381
)
0.125 (3.175) MIN
0.005 (0.127) MIN
*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)
0.697 - 0.712* (17.70 - 18.08)
0.291 - 0.299** (7.391 - 7.595) 0.005 (0.127) RAD MIN 0.010 - 0.029 x 45 (0.254 - 0.737)
0.009 - 0.013 (0.229 - 0.330)
NOTE 1 0.016 - 0.050 (0.406 - 1.270)
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 LT(R)1158 LTC1255 DESCRIPTION Half-Bridge N-Channel Power MOSFET Driver Dual 24V High Side MOSFET Driver COMMENTS Passes Digital Information Across Isolation Barrier Useful for Motor Speed Control, Synchronous Switching Regulator User Set Current Limiting
LT/GP 1195 10K * PRINTED IN USA
LTC1145/LTC1146 Low Power Digital Isolator
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
U
0.065 (1.651) TYP 0.100 0.010 (2.540 0.254)
0.255 0.015* (6.477 0.381)
0.018 0.003 (0.457 0.076)
1
7
8
9
28
27
26
25
18
17
16
15
NOTE 1
0.394 - 0.419 (10.007 - 10.643)
1 0.093 - 0.104 (2.362 - 2.642)
2
3
4
11
12
13
14 0.037 - 0.045 (0.940 - 1.143)
0 - 8 TYP 0.050 (1.270) TYP
0.014 - 0.019 (0.356 - 0.482)
0.004 - 0.012 (0.102 - 0.305)
(c) LINEAR TECHNOLOGY CORPORATION 1995

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