LTC1771 データシートの表示（PDF） - Linear Technology
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LTC1771 Datasheet PDF : 16 Pages
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LTC1771
ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage (VIN)........................ – 0.3V to 20V
Peak Driver Output Current < 10µs (PGATE) ............. 1A
RUN/SS Voltage ......................... – 0.3V to (VIN + 0.3V)*
MODE Voltage .......................................... – 0.3V to 20V
ITH, VFB Voltage .......................................... – 0.3V to 5V
SENSE Voltage (VIN > 12V)..(VIN – 12V) to (VIN + 0.3V)*
SENSE Voltage (VIN ≤ 12V) ........ – 0.3V to (VIN + 0.3V)*
Junction Temperature (Note 2) ............................ 125°C
Operating Temperature Range (Note 3)
LTC1771E ......................................... – 40°C to 85°C
LTC1771I ......................................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
*RUN/SS and SENSE cannot exceed 20V.
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
RUN/SS 1
ITH 2
VFB 3
GND 4
8 MODE
7 SENSE
6 VIN
5 PGATE
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 200°C/ W
ORDER PART
NUMBER
LTC1771EMS8
MS8 PART MARKING
LTKD
TOP VIEW
RUN/SS 1
ITH 2
VFB 3
GND 4
8 MODE
7 SENSE
6 VIN
5 PGATE
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 110°C/ W
ORDER PART
NUMBER
LTC1771ES8
LTC1771IS8
S8 PART MARKING
1771
1771I
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 10V, VRUN = open unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
VFB
IFB
ISUPPLY
∆VLINEREG
∆VLOADREG
IQ
∆VSENSE(MAX)
∆VSENSE(MIN)
∆VSENSE(SLEEP)
tOFF
Feedback Voltage
Feedback Current
No-Load Supply Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current
Active Mode (PGATE = 0V)
Sleep Mode (Note 6)
Shutdown
Short Circuit
Maximum Current Sense Threshold
Minimum Current Sense Threshold
Sleep Current Sense Threshold
Switch Off Time
VMODE
Mode Pin Threshold
(Note 5)
(Note 5)
VIN = 10V, ILOAD = 0 (Note 6)
VIN = 5V to 15V (Note 5)
ITH = 0.5V to 2V, Burst Disabled (Note 5)
(Note 4)
VIN = 2.8V to 18V
VIN = 2.8V to 18V, VFB = 1.5V
VIN = 2.8V to 18V, VRUN = 0V
VIN = 2.8V to 18V, VFB = 0V
VFB = VREF – 20mV
VFB = VREF + 20mV, Burst Disabled
ITH = 1V
VFB at Regulated Value
VFB = 0V
VMODE Rising
q 1.205
q
q
q
1.230
1
10
0.003
0.25
1.255
10
0.03
1
150
235
9
15
2
6
175
275
q 110 140 180
– 25
50
3
3.5
4
70
q 0.5
1.3
2
UNITS
V
nA
µA
%/V
%
µA
µA
µA
µA
mV
mV
mV
µs
µs
V
2
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