参数资料
型号: LTC1771EMS8
厂商: Linear Technology
文件页数: 2/16页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 8-MSOP
标准包装: 50
PWM 型: 电流模式
输出数: 1
占空比: 100%
电源电压: 2.8 V ~ 18 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
包装: 管件
其它名称: Q1164777
LTC1771
ABSOLUTE
AXI U
RATI GS (Note 1)
Input Supply Voltage (V IN )........................ – 0.3V to 20V
Peak Driver Output Current < 10 μ s (PGATE) ............. 1A
RUN/SS Voltage ......................... – 0.3V to (V IN + 0.3V)*
MODE Voltage .......................................... – 0.3V to 20V
I TH , V FB Voltage .......................................... – 0.3V to 5V
SENSE Voltage (V IN > 12V)..(V IN – 12V) to (V IN + 0.3V)*
SENSE Voltage (V IN ≤ 12V) ........ – 0.3V to (V IN + 0.3V)*
PACKAGE/ORDER I FOR ATIO
ORDER PART
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.
ORDER PART
NUMBER
TOP VIEW
NUMBER
RUN/SS
I TH
V FB
GND
1
2
3
4
TOP VIEW
8
7
6
5
MODE
SENSE
V IN
PGATE
LTC1771EMS8
RUN/SS 1
I TH 2
V FB 3
8
7
6
MODE
SENSE
V IN
LTC1771ES8
LTC1771IS8
MS8 PACKAGE
8-LEAD PLASTIC MSOP
MS8 PART MARKING
GND 4
S8 PACKAGE
5
PGATE
S8 PART MARKING
T JMAX = 125 ° C, θ JA = 200 ° C/ W
LTKD
8-LEAD PLASTIC SO
T JMAX = 125 ° C, θ JA = 110 ° C/ W
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.
V IN = 10V, V RUN = open unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V FB
I FB
Feedback Voltage
Feedback Current
(Note 5)
(Note 5)
q
q
1.205
1.230
1
1.255
10
V
nA
I SUPPLY
No-Load Supply Current
V IN = 10V, I LOAD = 0 (Note 6)
10
μ A
? V LINEREG
? V LOADREG
I Q
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current
Active Mode (PGATE = 0V)
Sleep Mode (Note 6)
Shutdown
Short Circuit
V IN = 5V to 15V (Note 5)
I TH = 0.5V to 2V, Burst Disabled (Note 5)
(Note 4)
V IN = 2.8V to 18V
V IN = 2.8V to 18V, V FB = 1.5V
V IN = 2.8V to 18V, V RUN = 0V
V IN = 2.8V to 18V, V FB = 0V
q
q
0.003
0.25
150
9
2
175
0.03
1
235
15
6
275
%/V
%
μ A
μ A
μ A
μ A
? V SENSE(MAX)
Maximum Current Sense Threshold
V FB = V REF – 20mV
q
110
140
180
mV
? V SENSE(MIN)
? V SENSE(SLEEP)
Minimum Current Sense Threshold
Sleep Current Sense Threshold
V FB = V REF + 20mV, Burst Disabled
I TH = 1V
– 25
50
mV
mV
t OFF
Switch Off Time
V FB at Regulated Value
V FB = 0V
3
3.5
70
4
μ s
μ s
V MODE
Mode Pin Threshold
V MODE Rising
q
0.5
1.3
2
V
2
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