參數(shù)資料
型號(hào): LT1317CS8
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Micropower, 600kHz PWM DC/DC Converters
中文描述: SWITCHING REGULATOR, 720 kHz SWITCHING FREQ-MAX, PDSO8
封裝: 0.150 INCH, PLASTIC, SO-8
文件頁(yè)數(shù): 3/16頁(yè)
文件大?。?/td> 447K
代理商: LT1317CS8
3
LT1317/LT1317B
ELECTRICAL C
Commercial Grade
HARA TERISTICS
V
IN
= 2V, V
SHDN
= 2V, T
A
= 25
°
C unless otherwise noted.
Industrial Grade
V
IN
= 2V, V
SHDN
= 2V, –40
°
C
T
A
85
°
C unless otherwise noted.
SYMBOL
I
Q
PARAMETER
Quiescent Current
CONDITIONS
Not Switching, V
SHDN
= 2V (LT1317)
V
SHDN
= 0V (LT1317/LT1317B)
V
SHDN
= 2V, Switching (LT1317B)
MIN
TYP
MAX
160
40
7.5
1.26
80
12
240
UNITS
G
G
G
μ
A
μ
A
mA
V
FB
I
B
Feedback Voltage
FB Pin Bias Current (Note 2)
Input Voltage Range
Error Amp Transconductance
Maximum Duty Cycle
Switch Current Limit (Note 3)
Switching Frequency
Shutdown Pin Current
G
1.20
V
G
nA
V
G
1.7
70
80
550
500
g
m
I = 5
μ
A
G
140
μ
mhos
G
%
V
IN
= 2.5V, Duty Cycle = 30%
G
1350
750
0.1
–7
220
0.25
0.1
60
3
400
0.15
6
0.4
mA
kHz
μ
A
μ
A
mV
f
OSC
G
V
SHDN
= V
IN
V
SHDN
= 0V
G
G
LBI Threshold Voltage
LBO Output Low
LBO Leakage Current
LBI Input Bias Current (Note 4)
Switch Leakage Current
Switch V
CE
Sat
Reference Line Regulation
SHDN Input Voltage High
SHDN Input Voltage Low
G
180
I
SINK
= 10
μ
A
V
LBI
= 250mV, V
LBO
= 5V
V
LBI
= 150mV
V
SW
= 5V
I
SW
= 500mA
1.8V
V
IN
12V
G
V
G
μ
A
nA
μ
A
mV
%/V
G
G
G
G
G
1.4
V
V
G
SYMBOL
PARAMETER
Shutdown Pin Current
CONDITIONS
V
SHDN
= V
IN
V
SHDN
= 0V
MIN
TYP
0.015
–2.3
200
200
0.15
0.02
5
2000
0.01
300
MAX
0.06
–6
210
220
0.25
0.1
40
UNITS
G
G
μ
A
μ
A
mV
mV
LBI Threshold Voltage
190
180
G
LBO Output Low
LBO Leakage Current
LBI Input Bias Current (Note 4)
Low-Battery Detector Gain
Switch Leakage Current
Switch V
CE
Sat
I
SINK
= 10
μ
A
V
LBI
= 250mV, V
LBO
= 5V
V
LBI
= 150mV
1M
Load
V
SW
= 5V
I
SW
= 500mA
G
V
G
μ
A
nA
V/V
μ
A
mV
mV
%/V
G
G
3
350
400
0.15
6
0.4
G
Reference Line Regulation
SHDN Input Voltage High
SHDN Input Voltage Low
1.8V
V
IN
12V
G
0.08
G
1.4
V
V
G
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.
The
G
denotes specifications which apply over the full operating
temperature range.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
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