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参数资料
型号： LT1307IS8#TR
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： 1.25 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO8
封装： 0.150 INCH, PLASTIC, SO-8
文件页数： 15/20页
文件大小： 369K
代理商： LT1307IS8#TR
4
LT1307/LT1307B
1307fa
ELECTRICAL C
C
HARA TERISTICS
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
Industrial Grade – 40
°C to 85°C. VIN = 1.1V, VSHDN = VIN, LT1307/LT1307B unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IQ
Quiescent Current
VFB = 1.3V, Not Switching (LT1307)
q
50
100
A
VFB = 1.3V, Not Switching (LT1307B)
q
1
1.8
mA
VSHDN = 0V
q
13
A
VFB
Feedback Voltage
q
1.195
1.22
1.245
V
IB
FB Pin Bias Current (Note 3)
VFB = VREF
q
10
27
100
nA
Reference Line Regulation
1V
≤ VIN ≤ 2V (–40°C)
0.6
1.1
%/V
1V
≤ VIN ≤ 2V (85°C)
3.2
%/V
2V
≤ VIN ≤ 5V
q
0.3
0.8
%/V
Minimum Input Voltage
– 40
°C
1.1
1.2
V
85
°C
0.8
1.0
V
Input Voltage Range
q
5V
gm
Error Amp Transconductance
I = 5A
q
25
35
65
mhos
AV
Error Amp Voltage Gain
– 40
°C35
V/V
85
°C30
V/V
fOSC
Switching Frequency
q
500
600
750
kHz
Maximum Duty Cycle
– 40
°C80
84
%
85
°C75
80
%
Switch Current Limit (Note 4)
DC = 40%
q
0.6
1.25
A
DC = 75%
0.5
A
Switch VCESAT
ISW = 500mA, VIN = 1.2V (– 40°C)
250
350
mV
ISW = 500mA (85°C)
330
400
mV
Burst Mode Operation Switch Current Limit
L = 10
H
100
mA
(LT1307 Only)
L = 22
H50
mA
Shutdown Pin Current
VSHDN = VIN
q
2.5
4.0
A
VSHDN = 0V
q
– 1.5
– 2.5
A
LBI Threshold Voltage
q
186
200
210
mV
LBO Output Low
ISINK = 10A
q
0.1
0.25
V
LBO Leakage Current
VLBI = 250mV, VLBO = 5V
q
0.1
0.3
A
LBI Input Bias Current (Note 5)
VLBI = 150mV
q
530
nA
Low-Battery Detector Gain
1M
Load (–40°C)
1000
6000
V/V
1M
Load (85°C)
400
V/V
Switch Leakage Current
VSW = 5V
q
0.01
3
A
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: 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.
Note 3: Bias current flows into FB pin.
Note 4: Switch current limit guaranteed by design and/or correlation to
static tests. Duty cycle affects current limit due to ramp generator.
Note 5: Bias current flows out of LBI pin.
Note 6: The LT1307/LT1307B will withstand continuous application of
1.6V applied to the GND pin while VIN and SW are grounded.
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