LT1680 Ver la hoja de datos (PDF) - Linear Technology
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LT1680 Datasheet PDF : 16 Pages
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LT1680
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Power Supply Voltage (12VIN) .................. – 0.3V to 20V
Sense Amplifier Input Common Mode ...... – 0.3V to 60V
GATE Pin Voltage....................... – 0.3V to 12VIN + 0.3V
RUN/SHDN Pin Voltage ......................... – 0.3V to 12VIN
All Other Pin Voltages ................................. – 0.3V to 7V
5V Reference Output Current ............................... 65mA
Operating Ambient Temperature Range
LT1680C .................................................. 0°C to 70°C
LT1680I .............................................. – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
SL/ADJ 1
CT 2
IAVG 3
SS 4
VC 5
SGND 6
VFB 7
VREF 8
16 5VREF
15 SYNC
14 12VIN
13 GATE
12 PGND
11 RUN/SHDN
10 SENSE –
9 SENSE +
N PACKAGE
16-LEAD PDIP
SW PACKAGE
16-LEAD PLASTIC SO WIDE
TJMAX = 125°C, θJA = 75°C/ W (N)
TJMAX = 125°C, θJA = 90°C/ W (SW)
Consult factory for Military grade parts.
ORDER PART
NUMBER
LT1680CN
LT1680CSW
LT1680IN
LT1680ISW
ELECTRICAL CHARACTERISTICS
12VIN = 12V, VVC = 2V, VFB = VREF = 1.25V, CGATE = 3000pF, TA = 25°C unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
Supply and Protection
I12VIN
DC Active Supply Current (Note 2)
Gate Output On
q
Gate Output Off
DC Standby Supply Current
VRUN < 0.5V
q
VRUN/SHDN Shutdown Rising Threshold
q
VSSHYST Shutdown Threshold Hysteresis
ISS
Soft Start Charge Current
q
VUVLO Undervoltage Lockout Threshold - Falling
q
Undervoltage Lockout Threshold - Rising
q
Undervoltage Lockout Hysteresis
q
5V Reference
VREF5
5V Reference Voltage
Line, Load and Temperature
q
5V Reference Line Regulation
10V ≤ 12VIN ≤ 15V
q
IREF5
5V Reference Load Range - DC
q
Pulse
q
5V Reference Load Regulation
0 ≤ IREF5 ≤ 20mA
q
ISC
5V Reference Short-Circuit Current
Error Amplifier
VFB
Error Amplifier Reference Voltage
Measured at Feedback Pin
q
IFB
Feedback Input Current
VFB = VREF
q
gm
Error Amplifier Transconductance
q
AV
Error Amplifier Voltage Gain
q
IVC
Error Amplifier Source Current
q
Error Amplifier Sink Current
VFB – VREF = 500mV
q
VVC
Absolute VC Clamp Voltage
Measured at VC Pin
MIN
1.15
5
8.20
200
4.75
1.242
1.235
0.1
1200
1500
200
280
TYP
15
12
65
1.25
15
8
9.00
9.35
350
5
3
– 1.25
45
1.250
0.5
2000
3000
275
400
3.5
MAX
22
110
1.35
14
9.75
9.95
5.25
5
10
20
–2
1.258
1.265
1.0
3200
UNITS
mA
mA
µA
V
mV
µA
V
V
mV
V
mV/V
mA
mA
V/A
mA
V
V
µA
µmho
V/V
µA
µA
V
2
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