參數(shù)資料
型號(hào): LT1173CS8-5
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Micropower DC/DC Converter Adjustable and Fixed 5V, 12V
中文描述: 1.5 A SWITCHING REGULATOR, 23 kHz SWITCHING FREQ-MAX, PDSO8
封裝: PLASTIC, SOIC-8
文件頁數(shù): 3/16頁
文件大?。?/td> 322K
代理商: LT1173CS8-5
LT1173
3
V
SAT
SW
SAT
Voltage, Step-Down Mode
V
IN
= 12V, I
SW
= 650mA
1.1
1.5
1.7
V
V
G
A
V
Gain Block Gain
Current Limit
Current Limit Temperature Coeff.
Switch OFF Leakage Current
Maximum Excursion Below GND
R
L
= 100k
(Note 3)
220
to I
LIM
to V
IN
G
400
1000
400
–0.3
1
–400
V/V
mA
%/
°
C
μ
A
mV
G
Measured at SW1 Pin
I
SW1
10
μ
A, Switch Off
10
V
SW2
–350
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Note 2:
The output voltage waveform will exhibit a sawtooth shape due to
the comparator hysteresis. The output voltage on the fixed output versions
will always be within the specified range.
Note 3:
100k
resistor connected between a 5V source and the AO pin.
The
G
denotes the specifications which apply over the full operating
temperature range.
Note 1:
This specification guarantees that both the high and low trip points
of the comparator fall within the 1.20V to 1.30V range.
ELECTRICAL C
HARA TERISTICS
T
A
= 25
°
C, V
IN
= 3V, unless otherwise noted.
Maximum Switch Current vs
R
LIM
Step-Down Mode
Set Pin Bias Current vs
Temperature
Feedback Pin Bias Current vs
Temperature
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
I (A)
0
0
V
0.2
0.4
0.6
1.0
1.2
0.2
0.4
0.6
0.8
LT1173 TPC01
0.8
1.0
1.2
C
V = 5.0V
V = 3.0V
V = 2.0V
I (A)
0
0.7
S
0.8
0.9
1.1
1.3
1.4
0.1
0.2
0.3
0.4
LT1173 TPC02
1.2
0.5
0.6
0.7
0.8
1.0
Switch ON Voltage
Step-Down Mode
(SW1 Pin Connected to V
IN
)
Saturation Voltage Step-Up Mode
(SW2 Pin Grounded)
Maximum Switch Current vs
R
LIM
Step-Up Mode
TEMPERATURE (°C)
–50
S
10
15
20
–25
0
25
50
LT1173 TPC04
75
100
125
V = 3V
5
TEMPERATURE (°C)
–50
F
14
16
18
–25
0
25
50
LT1173 TPC05
75
100
125
V = 3V
μ
12
10
8
R ( )
100
0
S
400
800
1000
LT1173 TPC09
900
700
600
500
300
200
1000
V
OUT
= 5V
100
V
= 24V
L = 500
μ
H
V
= 12V
L = 250
μ
H
R ( )
10
100
S
400
800
1200
1100
100
LT1173 TPC03
1000
900
700
600
500
300
200
1000
2V
V
IN
5V
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