參數資料
型號: LT1111IS8-5#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, PDSO8
封裝: LEAD FREE, SOIC-8
文件頁數: 12/16頁
文件大?。?/td> 237K
代理商: LT1111IS8-5#PBF
5
LT1111
1111fd
CC
HARA TERISTICS
UW
A
TYPICALPERFOR
CE
GND (Pin 5): Ground.
A0 (Pin 6): Auxiliary Gain Block (GB) Output. Open collector,
can sink 300
A.
SET (Pin 7): GB Input. GB is an op amp with positive input
connected to SET pin and negative input connected to
1.25V reference.
FB/SENSE (Pin 8): On the LT1111 (adjustable) this pin
goes to the comparator input. On the LT1111-5 and
LT1111-12, this pin goes to the internal application resistor
that sets output voltage.
Maximum Switch Current
Quiescent Current
vs RLIM
INPUT VOLTAGE (V)
QUIESCENT
CURRENT
(
A)
0
LT1111 TPC10
3
400
380
360
340
320
280
260
6
240
220
200
300
9
1215 1821 24 27
30
TEMPERATURE (
°C)
QUIESCENT
CURRENT
(
A)
–50
LT1111 TPC11
500
450
400
350
250
–25
150
100
200
300
0
25
50
75
100
125
TEMPERATURE (
°C)
BIAS
CURRENT
(nA)
–50
LT1111 TPC14
100
90
80
70
50
–25
30
20
40
60
0
25
50
75
100
125
10
0
ILIM (Pin 1): Connect this pin to VIN for normal use. Where
lower current limit is desired, connect a resistor between
ILIM and VIN. A 220 resistor will limit the switch current
to approximately 400mA.
VIN (Pin 2): Input Supply Voltage.
SW1 (Pin 3): Collector of Power Transistor. For step-up
mode connect to inductor/diode. For step-down mode
connect to VIN.
SW2 (Pin 4): Emitter of Power Transistor. For step-up
mode connect to ground. For step-down mode connect to
inductor/diode. This pin must never be allowed to go more
than a Schottky diode drop below ground.
PI
U
FU
U
C
U
S
O
TI
TEMPERATURE (
°C)
BIAS
CURRENT
(nA)
–50
LT1111 TPC13
100
90
80
70
50
–25
30
20
40
60
0
25
50
75
100
125
10
0
Set Pin Bias Current
Feedback Bias Current
RLIM ()
SWITCH
CURRENT
(A)
10
LT1111 TPC12
100
1.5
1.4
1.3
1.2
1.1
0.9
0.8
1000
0.7
0.6
0.5
0.4
0.3
0.2
0.1
1.0
STEP-DOWN
VIN = 12V
STEP-UP
2V
≤ V
IN ≤ 5V
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