LT1176CS Просмотр технического описания (PDF) - Linear Technology
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LT1176CS Datasheet PDF : 4 Pages
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LT1176/LT1176-5
ABSOLUTE AXI U RATI GS
Input Voltage .......................................................... 38V
Switch Voltage With Respect to Input Voltage ........ 50V
Switch Voltage With Respect to Ground Pin
(VSW Negative) (Note 6) ......................................... 20V
Feedback Pin Voltage....................................... – 2V, 10V
Shutdown Pin Voltage (Not to Exceed VIN) ............. 35V
Status Pin Voltage
(Current Must Be Limited to 5mA When Status Pin
Switches “ON”) ................................................... 30V
ILIM Pin Voltage (Forced)...................................... 5.5V
Maximum Operating Ambient Temperature Range
LT1176C/LT1176C-5 .............................. 0°C to 70°C
Maximum Operating Junction Temperature Range
LT1176C/LT1176C-5 ............................ 0°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec) 300°C
*These thermal resistance numbers are for typical mounting technique. Lower thermal resistance
can be obtained with large copper lands, thermal glues or heatsinks.
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VIN 1
ILIM 2
GND 3
FB/SENSE 4
8 VSW
7 VC
6 STATUS
5 SHUTDOWN
N8 PACKAGE
8-LEAD PLASTIC DIP
TJ MAX = 125°C, θJA = 90°C/ W*
TOP VIEW
VIN 1
NC 2
ILIM 3
GND 4
GND 5
GND 6
GND 7
NC 8
FB/SENSE 9
NC 10
20 VSW
19 NC
18 VC
17 GND
16 GND
15 GND
14 GND
13 STATUS
12 SHUTDOWN
11 NC
S PACKAGE
20-LEAD PLASTIC SOL
TJMAX = 125 °C, θJA = 50°C/ W*
ORDER PART
NUMBER
LT1176CN8
LT1176CN8-5
ORDER PART
NUMBER
LT1176CS
LT1176CS-5
ELECTRICAL CHARACTERISTICS TJ = 25°C, VIN = 25V, unless otherwise noted
PARAMETER
CONDITIONS
MIN
Switch “ON” Voltage (Note 1)
ISW = 0.2A
q
ISW = 1A
q
Switch “OFF” Leakage
VIN = 25V, VSW = 0
VIN = VMAX, VSW = 0 (Note 7)
Supply Current (Note 2)
VFB = 2.5V, VIN ≤ 35V
q
VSHDN = 0.1V (Device Shutdown) (Note 8)
q
Minimum Supply Voltage
Normal Mode
q
Startup Mode (Note 3)
q
Switch Current Limit (Note 4)
Maximum Duty Cycle
ILIM Open
RLIM = 10k (Note 5)
RLIM = 7k (Note 5)
q 1.2
q
85
Switching Frequency
Switching Frequency Line Regulation
Error Amplifier Voltage Gain (Note 9)
Error Amplifier Transconductance (Note 9)
VFB = 0V Through 2k (Note 4) (LT1176)
VSENSE = 0V (Note 4) (LT1176-5)
8V ≤ VIN ≤ VMAX (Note 7)
1V ≤ VC ≤ 4V
90
q
85
q
3700
Error Amplifier Source and Sink Current
Source (VFB = 2V or VSENSE = 4V)
Sink (VFB = 2.5V or VSENSE = 5.5V)
100.0
0.7
TYP
7.5
140.0
7.3
3.5
1.7
1.2
0.8
90
100
20
20
0.03
2000
5000
140.0
1.0
MAX
1.1
1.4
150
250
10
300
8.0
4.8
2.2
110
120
0.1
8000
225.0
1.6
UNITS
V
V
µA
µA
mA
µA
V
V
A
A
A
%
kHz
kHz
kHz
kHz
%/ V
V/ V
µmho
µA
mA
2
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