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LTC1771 数据表(PDF) 2 Page - Linear Technology

部件名 LTC1771
功能描述  Low Quiescent Current High Efficiency Step-Down DC/DC Controller
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC1771 数据表(HTML) 2 Page - Linear Technology

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LTC1771
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.
LTC1771EMS8
TJMAX = 125°C, θJA = 150°C/ W
ORDER PART
NUMBER
Input Supply Voltage (VIN)........................ –0.3V to 20V
Peak Driver Output Current < 10
µs (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)
(Note 1)
Consult factory for Military grade parts.
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
LTC1771ES8
LTC1771IS8
ORDER PART
NUMBER
RUN/SS
ITH
VFB
GND
1
2
3
4
8
7
6
5
MODE
SENSE
VIN
PGATE
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
MS8 PART MARKING
TOP VIEW
MODE
SENSE
VIN
PGATE
RUN/SS
ITH
VFB
GND
S8 PACKAGE
8-LEAD PLASTIC SO
1
2
3
4
8
7
6
5
TJMAX = 125°C, θJA = 110°C/ W
S8 PART MARKING
1771
1771I
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VFB
Feedback Voltage
(Note 5)
q
1.205
1.230
1.255
V
IFB
Feedback Current
(Note 5)
q
110
nA
ISUPPLY
No-Load Supply Current
VIN = 10V, ILOAD = 0 (Note 6)
10
µA
∆VLINEREG
Reference Voltage Line Regulation
VIN = 5V to 15V (Note 5)
q
0.003
0.03
%/V
∆VLOADREG
Output Voltage Load Regulation
ITH = 0.5V to 2V, Burst Disabled (Note 5)
q
0.25
1
%
IQ
Input DC Supply Current
(Note 4)
Active Mode (PGATE = 0V)
VIN = 2.8V to 18V
150
235
µA
Sleep Mode (Note 6)
VIN = 2.8V to 18V, VFB = 1.5V
9
15
µA
Shutdown
VIN = 2.8V to 18V, VRUN = 0V
2
6
µA
Short Circuit
VIN = 2.8V to 18V, VFB = 0V
175
275
µA
∆VSENSE(MAX)
Maximum Current Sense Threshold
VFB = VREF – 20mV
q
110
140
180
mV
∆VSENSE(MIN)
Minimum Current Sense Threshold
VFB = VREF + 10mV, Burst Disabled
– 25
mV
∆VSENSE(SLEEP) Sleep Current Sense Threshold
ITH = 1V
50
mV
tOFF
Switch Off Time
VFB at Regulated Value
3.5
µs
VFB = 0V
70
µs
VMODE
Mode Pin Threshold
VMODE Rising
q
0.5
1.3
2
V
LTKD
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
ELECTRICAL CHARACTERISTICS


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