參數(shù)資料
型號(hào)： LT1432CS8
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 5V High Efficiency Step-Down Switching Regulator Controller
中文描述： SWITCHING CONTROLLER, PDSO8
封裝： PLASTIC, SO-8
文件頁數(shù)： 2/28頁
文件大小： 611K
代理商： LT1432CS8
2
LT1432
V
IN
Pin.................................................................... 30V
V
+
Pin ..................................................................... 40V
V
C
........................................................................... 35V
V
LIM
and V
OUT
Pins................................................... 7V
Diode Pin Voltage ................................................... 30V
Mode Pin Current (Note 2) ..................................... 1mA
Operating Temperature Range.................... 0
°
C to 70
°
C
Storage Temperature Range................ –65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec.)................ 300
°
C
A
U
G
W
A
W
U
W
A
R
BSOLUTE
XI
TI
S
U
PACKAGE/ORDER U
ORDER PART
NUMBER
LT1432CN8
LT1432CS8
ELECTRICAL C
V
C
= 6V, V
IN
= 12V, V
+
= 10V, V
DIODE
= Open, V
LIM
= V
OUT
, V
MODE
= 0V, T
J
= 25
°
C
Device is in standard test loop unless otherwise noted.
HARA TERISTICS
PARAMETER
Regulated Output Voltage
Output Voltage Line Regulation
Input Supply Current (Note 1)
Quiescent Output Load Current
Mode Pin Current
CONDITIONS
V
C
Current = 220
μ
A
V
IN
= 6V to 30V
V
IN
= 6V to 30V, V
+
= V
IN
+ 5V, V
C
= V
IN
+ 1V
MIN
4.9
TYP
5.0
5
0.3
0.9
30
15
0.9
MAX
5.1
20
0.5
1.2
50
30
1.5
UNITS
G
V
G
mV
mA
mA
μ
A
μ
A
G
V
MODE
= 0V (current is out of pin)
V
MODE
= 5V (shutdown)
I
MODE
= 10
μ
A (out of pin)
G
G
Mode Pin Threshold Voltage
(Normal to Burst)
V
C
Pin Saturation Voltage
V
C
Pin Maximum Sink Current
V
C
Pin Source Current
Current Limit Sense Voltage (Note 3)
V
LIM
Pin Current
G
0.6
V
V
OUT
= 5.5V (forced)
V
OUT
= 5.5V (forced)
V
OUT
= 4.5V (forced)
Device in Current Limit Loop
Device in Current Limit Loop
(current is out of pin)
V
MODE
> 3V, V
IN
< 30V, V
C
and V
+
= 0V
Device in Burst Test Circuit
Device in Burst Test Circuit
I
F
= 1mA, All Other Pins Open
V
OUT
= 2.5V (forced), V
+
= 5V to 25V,
V
IN
= 6V to 26V, V
+
= V
IN
– 1V, V
C
= V
IN
– 1.5V
(Note 4)
I
C
= 150
μ
A to 250
μ
A
G
0.25
0.8
60
60
45
0.45
1.5
100
64
70
V
G
0.45
40
56
30
mA
μ
A
mV
μ
A
G
G
Supply Current in Shutdown
Burst Mode Output Ripple
Burst Mode Average Output Voltage
Clamp Diode Forward Voltage
Startup Drive Current
G
15
100
5
0.5
45
60
μ
A
mV
p-p
G
4.8
5.2
0.65
V
V
G
G
30
mA
Restart Time Delay
Transconductance, Output to V
C
Pin
1
1.8
2000
10
ms
G
1500
2800
μ
mho
The
G
denotes specifications which apply over the operating temperature
range.
Note 1:
Does not include current drawn by the LT1070 IC. See operating
parameters in standard circuit.
Note 2:
Breakdown voltage on the mode pin is 7V. External current must
be limited to value shown.
Note 3:
Current limit sense voltage temperature coefficient is +0.33%/
°
C
to match TC of copper trace material.
Note 4: V
OUT
pin switched from 5.5Vto 4.5V.
1
2
3
4
TOP VIEW
V
LIM
V
OUT
V
IN
V
+
MODE
GND
V
C
DIODE
N8 PACKAGE
8-LEAD P
S8 PACKAGE
8-LEAD PLASTIC SO
8
7
6
5
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