參數(shù)資料
型號: LT1307CS8
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 8-Bit Identity Comparators (P=Q) with Enable and 20K Ohm Q-Input Pullup Resistors 20-SOIC 0 to 70
中文描述: 1.25 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO8
封裝: 0.150 INCH, PLASTIC, SO-8
文件頁數(shù): 4/20頁
文件大?。?/td> 377K
代理商: LT1307CS8
4
LT1307/LT1307B
ELECTRICAL C
Industrial Grade –40
°
C to 85
°
C. V
IN
= 1.1V, V
SHDN
= V
IN
, LT1307/LT1307B unless otherwise noted.
HARA TERISTICS
SYMBOL
I
Q
PARAMETER
Quiescent Current
CONDITIONS
V
FB
= 1.3V, Not Switching (LT1307)
V
FB
= 1.3V, Not Switching (LT1307B)
V
SHDN
= 0V
MIN
TYP
50
1
1
1.22
27
0.6
MAX
100
1.8
3
1.245
100
1.1
3.2
0.8
1.2
1.0
5
65
UNITS
G
G
G
μ
A
mA
μ
A
V
FB
I
B
Feedback Voltage
FB Pin Bias Current (Note 2)
Reference Line Regulation
G
1.195
10
V
V
FB
= V
REF
1V
V
IN
2V (–40
°
C)
1V
V
IN
2V (85
°
C)
2V
V
IN
5V
–40
°
C
85
°
C
G
nA
%/V
%/V
%/V
G
0.3
1.1
0.8
Minimum Input Voltage
V
V
V
Input Voltage Range
Error Amp Transconductance
Error Amp Voltage Gain
G
g
m
A
V
I = 5
μ
A
–40
°
C
85
°
C
G
25
35
30
500
80
75
35
μ
mhos
V/V
V/V
kHz
f
OSC
Switching Frequency
Maximum Duty Cycle
G
600
84
80
0.6
0.5
250
330
750
–40
°
C
85
°
C
DC = 40%
DC = 75%
I
SW
= 500mA, V
IN
= 1.2V (–40
°
C)
I
SW
= 500mA (85
°
C)
L = 10
μ
H
L = 22
μ
H
V
SHDN
= V
IN
V
SHDN
= 0V
%
%
A
A
Switch Current Limit (Note 3)
G
1.25
Switch V
CESAT
350
400
mV
mV
Burst Mode Operation Switch Current Limit
(LT1307 Only)
Shutdown Pin Current
100
50
2.5
–1.5
200
0.1
0.1
5
6000
mA
mA
μ
A
μ
A
mV
G
G
4.0
–2.5
210
0.25
0.3
30
LBI Threshold Voltage
LBO Output Low
LBO Leakage Current
LBI Input Bias Current (Note 4)
Low-Battery Detector Gain
G
186
I
SINK
= 10
μ
A
V
LBI
= 250mV, V
LBO
= 5V
V
LBI
= 150mV
1M
Load (–40
°
C)
1M
Load (85
°
C)
V
SW
= 5V
G
V
G
μ
A
nA
V/V
V/V
μ
A
G
1000
400
Switch Leakage Current
G
0.01
3
Note 2:
Bias current flows into FB pin.
Note 3:
Switch current limit guaranteed by design and/or correlation to
static tests. Duty cycle affects current limit due to ramp generator.
Note 4:
Bias current flows out of LBI pin.
Note 5:
The LT1307 will withstand continuous application of 1.6V applied
to the GND pin while V
IN
and SW are grounded.
The
G
denotes specifications which apply over the full operating
temperature range.
Note 1:
Specifications for commercial (C) grade devices are guaranteed
but not tested at –20
°
C. MS8 package devices are designed for and
intended to meet commercial temperature range specifications but are not
tested at –20
°
C or 0
°
C.
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