View LT1089_226025.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

LT1089 High Side Switch
FEATURES

DESCRIPTIO
7.5A Switch Capability Low Series Drop (< 1.5V at 7.5A) Logic Input (Positive or Negative Logic) Current Limited Thermal Overload 5mA Quiescent Current 10s Risetime
The LT(R)1089 is a logic driven, high current, high side switch utilizing bipolar technology. The device is capable of driving loads up to 7.5A with a low series drop of only 1.5V, and the series drop is specified over the full range of switch currents. The device has internal current limiting and thermal overload protection. The input logic is designed so that the output can drive loads referenced either above or below the device ground pin. Either positive or negative logic can be used to drive the input. The device is available in both TO-3 metal can and TO-220 plastic packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
BLOCK DIAGRA
VCC
2
LT1089 Switch Voltage vs Output Current
INDICATES GUARANTEED TEST POINT
SWITCH FORWARD DROP (V)
BIAS, THERMAL LIMIT, CURRENT LIMIT, OUTPUT DRIVE LOGIC IN IQ 5mA VOUT
0C TJ 125C
1 TJ = 150C TJ = 25C TJ = - 55C
0
0
1
2
LOGIC GND
LT1089 * BD01
U
- 55C TJ 150C 345678 SWITCH CURRENT (A) 9 10
LT1089 * BD02
W
1089fa
1
LT1089
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW VIN 1 CASE IS VOUT 2 3 NC
Switch Voltage (VCC - VOUT) .................................. 30V Logic Input Voltage (VIN - GND) ............................ 15V Logic Input Voltage Range (VlN) .. (VCC - 30V) < VIN < VCC Ground Pin Voltage Range (GND) .. (VCC - 30V) < GND < VCC Operating Junction Temperature Range LT1089M Grades ................................ -55C to 150C LT1089C Grades ...................................... 0C to 125C Storage Temperature Range ................. -65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C
ORDER PART NUMBER LT1089MK LT1089CK
4
LOGIC IN K PACKAGE 4-LEAD TO-3 METAL CAN
GND
AXI U OPERATING SPECIFICATIONS* U
OBSOLETE PACKAGE
Consider the T Package as an Alternate Source
Switch Voltage (VCC - VOUT) ................................. 20V Logic Input Voltage (VIN - GND) .............................. 5V Logic Input Voltage Range (VlN) ......(VCC - 20V) < VIN < VCC Ground Pin Voltage Range (GND)....(VCC - 20V) < GND < VCC
*Maximum operating specifications are the maximum recommended operating voltages. The device is fully specified up to the maximum operating specifications. For voltages greater than the maximum operating specifications some device parameters may exceed the data sheet limits.
FRONT VIEW 5 4 3 2 1 NC LOGIC IN VIN VOUT GND
ORDER PART NUMBER LT1089CT
T PACKAGE 5-LEAD TO-220
LT1089 * POI01
Consult LTC Marketing for parts specified with wider operating temperature ranges.
2
U
1089fa
W
U
U
WW
U
W
WW
W
LT1089
ELECTRICAL CHARACTERISTICS
temperature range. (Note 1)
PARAMETER Output Saturation Voltage Input Voltage (VIN - GND)
The denotes the specifications which apply over full operating
MIN
CONDITIONS (NOTE 2) ISWITCH = 7.5A, (VIN - GND) = 5V, 4V (VCC - GND) < 20V Switch ON, (Note 3) 4V < (VCC - GND) < 20V Switch OFF, (Note 4) 4V < (VCC - GND) < 20V
TYP 1.3 1.5
MAX 1.5
UNITS V V V

2.4 1.5 0.8 - 20 - 100 0 5 3.5 5.0 0 20 5 8.0 0.5 9.5 1.0 1 10 12.0 1.5 10 5 20 10 25 10 25 1.6 2.0
V V A A A A mA mA A A mA A A s s s s s s s s C/ W C/ W
Input Current
Switch ON, (VIN - GND) = 5V
Switch OFF, (VIN - GND) = 0V
Ground Pin Current
Switch ON, (VIN - GND) = 5V
Switch OFF, (VIN - GND) = 0V
Output Current Current Limit
Switch OFF, (VIN - GND) = 0V Switch ON, (VIN - GND) = 5V (VCC - VOUT) = 5V (VCC - VOUT) = 20V

Turn-On Delay Turn-Off Delay
Output Risetime Output Falltime Thermal Resistance
RLOAD = 4
RLOAD = 4 (Note 5)
K Package T Package
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Unless otherwise specified, (VCC - GND) = 20V and the output load is referred to the ground pin (GND) of the device. Positive current values are defined to flow out of the device.
Note 3: For input voltages greater than 2.4V the device Is guaranteed to be turned on. 1.5V is the typical threshold at 25C. Note 4: For input voltages less than 0.8V, the device is guaranteed to be in an off state. 1.5V is the typical switch threshold at 25C. Note 5: For reactive loads such as large capacitors, the output falltime will be determined by the load.
1089fa
3
LT1089 TYPICAL PERFOR A CE CHARACTERISTICS
Minimum Output Current
10
MINIMUM OUTPUT CURRENT (mA)
9 8 7 6 5 4 3 2 1 0 0
(LOGIC IN - GND) = 0V SWITCH OFF SHORT-CIRCUIT CURRENT (A)
TJ = 150C TJ = 25C
5
20 15 10 25 SWITCH VOLTAGE (V)
Input Trip Voltage (Logic In - GND)
3.0 2.5 INPUT TRIP POINT (V) 2.0 1.5 1.0 0.5 0 25 50 75 100 125 150 - 50 - 25 0 JUNCTION TEMPERATURE (C)
LTC1089 * TPC03
GROUND PIN CURRENT (mA)
Logic Input Current
150 VCC = 20V TJ = - 55C
INPUT CURRENT (A)
OUTPUT VOLTAGE (V)
100
50
0
0
5 10 INPUT VOLTAGE (LOGIC IN - GND) (V)
4
UW
Short-Circuit Current
12 10 8 6 -55C 4 2 0
30 35
25C 150C
TJ = - 55C
0
20 30 15 25 5 10 SWITCH VOLTAGE (VCC - VOUT) (V)
35
LTC1089 * TPC01
LTC1089 * TPC02
Ground Pin Current
15 TJ = -55C TJ = 25C 10 TJ = 125C 5
0
0
5 10 INPUT VOLTAGE (LOGIC IN - GND) (V)
15
LTC1089 * TPC04
Rise and Fall Times
18 RL = 2 16 V OUT = 10V 14 12 10 8 6 4 2
TJ = 125C 15
TJ = 25C
0 -2 0 10 20 30 40 50 60 70 80 90 100 TIME (s)
LTC1089 * TPC06
LTC1089 * TPC05
1089fa
LT1089
TYPICAL APPLICATIO S
Driving Ground Referred Loads
12V
LOGIC IN
LT1089
LT1089 * TA01
APPLICATIO HI TS
The logic and ground pins function as a differential logic input with a common-mode range of VCC to VCC - 20V and a differential threshold voltage (VLOGIC - GND) of 1.5V. Note that if either Logic In or GND are left open the switch remains inactive. The LT1089 must be protected against overvoltage at turn-off when driving inductive loads. The inductive flyback voltage can easily exceed the maximum operating switch voltage (VCC - VOUT) of 20V, potentially damaging the switch. The solution is to clamp the switch voltage to 20V or less with a zener diode. Remember that the switch can handle 7.5A and the Zener may be required to handle the same amount of current. Care must be exercised when operating near the maximum switch voltage. A high current or capacitive load may trip the current limit circuit at turn-on, thereby adversely affecting the risetime of VOUT. The risetime is then governed by the current limit divided by the load capacitance, while the falltime is a function of the complex load. In addition, at switch voltages greater than 18V the switch current must be less than 0.5A or the device output will not pull up. Check the short circuit current characteristics for more detailed information.
U
Driving Negative Referred Loads
12V
Driving Inductive Loads
12V
VOUT
LOGIC IN
LT1089
VOUT
20V LOGIC IN LT1089 VOUT
-5V
LT1089 * TA02
LT1089 * TA03
UU
1089fa
5
LT1089
PACKAGE DESCRIPTIO
0.320 - 0.350 (8.13 - 8.89)
0.420 - 0.480 (10.67 - 12.19)
6
U
K Package 4-Lead TO-3 Metal Can
(Reference LTC DWG # 05-08-1311)
0.760 - 0.775 (19.30 - 19.69) 0.060 - 0.135 (1.524 - 3.429) 0.038 - 0.043 (0.965 - 1.09) 1.177 - 1.197 (29.90 - 30.40) 0.655 - 0.675 (16.64 - 19.05) 0.151 - 0.161 (3.84 - 4.09) DIA 2 PLC 0.167 - 0.177 (4.24 - 4.49) R 72 18 0.490 - 0.510 (12.45 - 12.95) R 0.470 TP P.C.D.
K4(TO-3) 1098
OBSOLETE PACKAGE
1089fa
LT1089
PACKAGE DESCRIPTIO
.390 - .415 (9.906 - 10.541)
.147 - .155 (3.734 - 3.937) DIA .230 - .270 (5.842 - 6.858)
.460 - .500 (11.684 - 12.700)
.330 - .370 (8.382 - 9.398)
BSC
.067 (1.70)
.028 - .038 (0.711 - 0.965)
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
T Package 5-Lead Plastic TO-220 (Standard)
(Reference LTC DWG # 05-08-1421)
.165 - .180 (4.191 - 4.572) .045 - .055 (1.143 - 1.397) .570 - .620 (14.478 - 15.748) .700 - .728 (17.78 - 18.491) .620 (15.75) TYP SEATING PLANE .152 - .202 .260 - .320 (3.861 - 5.131) (6.60 - 8.13) .095 - .115 (2.413 - 2.921) .155 - .195* (3.937 - 4.953) .013 - .023 (0.330 - 0.584) .135 - .165 (3.429 - 4.191) * MEASURED AT THE SEATING PLANE
T5 (TO-220) 0801
1089fa
7
LT1089
RELATED PARTS
PART NUMBER LTC1155 LT1160/LT1162 LTC1693 LTC1693-5 LTC1710 LTC1981/LTC1982 LTC4412 DESCRIPTION Dual High Side Micropower MOSFET Driver Half/Full-Bridge N-Channel MOSFET Drivers High Speed Single/Dual N-Channel MOSFET Drivers High Speed Single P-Channel MOSFET Driver SMBus Dual High Side Switch Single and Dual Micropower High Side Switch Controllers in SOT-23 Low Loss PowerPath Controller COMMENTS No External Charge Pump Required; N-Channel MOSFET 60V Floating Switch; Prevent Shoot Through SO-8; 1.5A Peak Output Current 16ns Rise/Fall Times at VCC = 12V, CL = InF Two 0.4/300mA N-Channel Switches No External Components Required Automatic Switching Between DC Sources
1089fa
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507
LW/TP 1002 1K REV A * PRINTED IN USA
www.linear.com
LINEAR TECHNOLOGY CORPORATION 1989

▲Up To Search▲

Price & Availability of LT1089

	To Download LT1089 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .