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LT1089MK

LT1089MK

  • 厂商:

    LINER

  • 封装:

  • 描述:

    LT1089MK - High Side Switch Utilizing Bipolar Technology - Linear Technology

  • 数据手册
  • 价格&库存
LT1089MK 数据手册
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 10µs Risetime The LT®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 0°C ≤ TJ ≤ 125°C 1 TJ = 150°C TJ = 25°C TJ = – 55°C 0 0 1 2 LOGIC GND LT1089 • BD01 U – 55°C ≤ TJ ≤ 150°C 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 ................................ –55°C to 150°C LT1089C Grades ...................................... 0°C to 125°C Storage Temperature Range ................. –65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C 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 µA µA µA µA mA mA µA µA mA A A µs µs µs µs µs µs µs µs °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 = 4Ω ● RLOAD = 4Ω (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 25°C. 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 25°C. 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 = 150°C TJ = 25°C 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 = – 55°C INPUT CURRENT (µA) OUTPUT VOLTAGE (V) 100 50 0 0 5 10 INPUT VOLTAGE (LOGIC IN – GND) (V) 4 UW Short-Circuit Current 12 10 8 6 –55°C 4 2 0 30 35 25°C 150°C TJ = – 55°C 0 20 30 15 25 5 10 SWITCH VOLTAGE (VCC – VOUT) (V) 35 LTC1089 • TPC01 LTC1089 • TPC02 Ground Pin Current 15 TJ = – 55°C TJ = 25°C 10 TJ = 125°C 5 0 0 5 10 INPUT VOLTAGE (LOGIC IN – GND) (V) 15 LTC1089 • TPC04 Rise and Fall Times 18 RL = 2Ω 16 V OUT = 10V 14 12 10 8 6 4 2 TJ = 125°C 15 TJ = 25°C 0 –2 0 10 20 30 40 50 60 70 80 90 100 TIME (µs) 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 0.4Ω/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
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