LT1089CT [Linear]
High Side Switch Utilizing Bipolar Technology; 高边开关利用双极技术
| 型号： | LT1089CT |
| 厂家： | 
Linear |
| 描述： | High Side Switch Utilizing Bipolar Technology |
| 文件： | 总8页 (文件大小：87K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1089
High Side Switch
U
FEATURES
DESCRIPTIO
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.
■
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
, LTC and LT are registered trademarks of Linear Technology Corporation.
W
BLOCK DIAGRA
V
LT1089 Switch Voltage
vs Output Current
CC
2
INDICATES GUARANTEED TEST POINT
–55°C ≤ T ≤ 150°C
J
BIAS,
0°C ≤ T ≤ 125°C
THERMAL LIMIT,
CURRENT LIMIT,
OUTPUT DRIVE
J
LOGIC IN
1
0
T
= 150°C
I
≈ 5mA
J
Q
T
= 25°C
J
V
T
= –55°C
OUT
J
0
1
2
3
4
5
6
7
8
9
10
SWITCH CURRENT (A)
LOGIC GND
LT1089 • BD02
LT1089 • BD01
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1
LT1089
W W
U W
U W
U
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
ORDER PART
NUMBER
BOTTOM VIEW
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
V
NC
IN
LT1089MK
LT1089CK
1
2
CASE IS
V
OUT
3
4
LOGIC IN
GND
K PACKAGE
4-LEAD TO-3 METAL CAN
W W
W U
OBSOLETE PACKAGE
AXI U OPERATING
U
Consider the T Package as an Alternate Source
SPECIFICATIONS*
ORDER PART
NUMBER
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
FRONT VIEW
LT1089CT
5
4
3
2
1
LOGIC IN
V
IN
V
OUT
GND
*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.
NC
T PACKAGE
5-LEAD TO-220
LT1089 • POI01
Consult LTC Marketing for parts specified with wider operating temperature
ranges.
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LT1089
ELECTRICAL CHARACTERISTICS
The ■ denotes the specifications which apply over full operating
temperature range. (Note 1)
PARAMETER
CONDITIONS (NOTE 2)
= 7.5A, (V – GND) = 5V,
MIN
TYP
MAX
UNITS
Output Saturation Voltage
I
■
1.3
1.5
V
SWITCH
IN
4V (V – GND) < 20V
CC
Input Voltage (V – GND)
Switch ON,
(Note 3) 4V < (V – GND) < 20V
1.5
1.5
V
V
IN
■
■
2.4
CC
Switch OFF,
(Note 4) 4V < (V – GND) < 20V
V
V
0.8
CC
Input Current
Switch ON, (V – GND) = 5V
–20
0
µA
µA
µA
µA
IN
■
■
–100
Switch OFF, (V – GND) = 0V
IN
±5
Ground Pin Current
Switch ON, (V – GND) = 5V
3.5
0
mA
mA
µA
IN
■
5.0
Switch OFF, (V – GND) = 0V
IN
■
■
±20
µA
Output Current
Current Limit
Switch OFF, (V – GND) = 0V
5
10
mA
IN
Switch ON, (V – GND) = 5V
IN
(V – V ) = 5V
■
■
8.0
0.5
9.5
1.0
12.0
1.5
A
A
CC
OUT
(V – V ) = 20V
CC
OUT
Turn-On Delay
1
µs
µs
■
■
■
■
10
20
25
25
Turn-Off Delay
Output Risetime
Output Falltime
Thermal Resistance
5
µs
µs
R
R
= 4Ω
10
10
µs
µs
LOAD
= 4Ω (Note 5)
µs
µs
LOAD
K Package
T Package
1.6
2.0
°C/W
°C/W
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
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 2: Unless otherwise specified, (V – 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 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
CC
be determined by the load.
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LT1089
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Minimum Output Current
Short-Circuit Current
10
12
10
8
(LOGIC IN – GND) = 0V SWITCH OFF
9
8
7
6
5
4
3
2
1
0
25°C
150°C
6
T = 150°C
J
–55°C
T = 25°C
J
4
2
0
T = –55°C
J
20
30
35
0
5
10
15
25
0
10
15
20
25
30
35
5
SWITCH VOLTAGE (V)
SWITCH VOLTAGE (V – V ) (V)
CC OUT
LTC1089 • TPC02
LTC1089 • TPC01
Input Trip Voltage
(Logic In – GND)
Ground Pin Current
15
10
5
3.0
2.5
2.0
1.5
1.0
0.5
0
T = –55°C
J
T = 25°C
J
T = 125°C
J
0
75 100
–50 –25
0
25 50
125 150
0
5
10
15
JUNCTION TEMPERATURE (°C)
INPUT VOLTAGE (LOGIC IN – GND) (V)
LTC1089 • TPC04
LTC1089 • TPC03
Rise and Fall Times
Logic Input Current
18
16
150
100
50
R = 2Ω
L
OUT
V
= 20V
CC
V
= 10V
14
12
T = –55°C
J
10
8
T = 25°C
J
6
4
2
0
T = 125°C
J
–2
0
0
10 20 30 40 50 60 70 80 90 100
0
5
10
15
INPUT VOLTAGE (LOGIC IN – GND) (V)
TIME (µs)
LTC1089 • TPC05
LTC1089 • TPC06
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LT1089
U
TYPICAL APPLICATIO S
Driving Ground Referred Loads
Driving Negative Referred Loads
Driving Inductive Loads
12V
12V
12V
LOGIC
20V
LOGIC
LT1089
IN
V
V
LT1089
OUT
OUT
IN
LOGIC
IN
V
LT1089
OUT
–5V
LT1089 • TA02
LT1089 • TA01
LT1089 • TA03
U U
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.
Care must be exercised when operating near the
maximumswitchvoltage.Ahighcurrentorcapacitiveload
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.
The LT1089 must be protected against overvoltage at
turn-offwhendrivinginductiveloads.Theinductiveflyback
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.
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5
LT1089
U
PACKAGE DESCRIPTIO
K Package
4-Lead TO-3 Metal Can
(Reference LTC DWG # 05-08-1311)
0.760 – 0.775
(19.30 – 19.69)
0.320 – 0.350
(8.13 – 8.89)
0.060 – 0.135
(1.524 – 3.429)
0.420 – 0.480
(10.67 – 12.19)
0.038 – 0.043
(0.965 – 1.09)
1.177 – 1.197
(29.90 – 30.40)
0.655 – 0.675
(16.64 – 19.05)
0.470 TP
P.C.D.
0.151 – 0.161
(3.84 – 4.09)
DIA 2 PLC
0.167 – 0.177
(4.24 – 4.49)
R
0.490 – 0.510
(12.45 – 12.95)
R
72°
18°
K4(TO-3) 1098
OBSOLETE PACKAGE
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LT1089
U
PACKAGE DESCRIPTIO
T Package
5-Lead Plastic TO-220 (Standard)
(Reference LTC DWG # 05-08-1421)
.165 – .180
(4.191 – 4.572)
.147 – .155
(3.734 – 3.937)
DIA
.390 – .415
(9.906 – 10.541)
.045 – .055
(1.143 – 1.397)
.230 – .270
(5.842 – 6.858)
.570 – .620
(14.478 – 15.748)
.620
(15.75)
TYP
.460 – .500
(11.684 – 12.700)
.330 – .370
(8.382 – 9.398)
.700 – .728
(17.78 – 18.491)
.095 – .115
(2.413 – 2.921)
SEATING PLANE
.152 – .202
(3.861 – 5.131)
.155 – .195*
(3.937 – 4.953)
.260 – .320
(6.60 – 8.13)
.013 – .023
(0.330 – 0.584)
.067
BSC
.135 – .165
(3.429 – 4.191)
.028 – .038
(0.711 – 0.965)
(1.70)
* MEASURED AT THE SEATING PLANE
T5 (TO-220) 0801
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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 represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
7
LT1089
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LW/TP 1002 1K REV A • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
8
■
■
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 1989
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