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參數(shù)資料
| 型號(hào)： | L4975A |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Power Switching Regulator(功率開關(guān)穩(wěn)壓器) |
| 中文描述： | 電源開關(guān)穩(wěn)壓器（功率開關(guān)穩(wěn)壓器） |
| 文件頁數(shù)： | 6/21頁 |
| 文件大?。?/td> | 285K |
| 代理商： | L4975A |
ELECTRICALCHARACTERISTICS
(Refer to the test circuit, T
j
= 25
°
C, V
i
= 35V, R
4
= 16K
,
C
9
= 2.2nF, f
SW
= 200KHz typ, unlessotherwise specified)
DYNAMIC CHARACTERISTICS
Symbol
V
i
Parameter
Test Condition
V
o
= V
ref
to 40V
I
o
= 5A
V
i
= 15V to 50V
I
o
= 3A; V
o
= V
re
f
V
i
= 15V to 50V
I
o
= 2A; V
o
= V
re
f
V
o
= V
ref
I
o
= 2A to 4A
I
o
= 1A to 5A
I
o
= 3A
I
o
= 5A
V
i
= 15 to 50V
V
o
= V
ref
to 40V
I
o
= 3A
V
o
= V
ref
V
o
= 12V
I
o
= 5A
V
o
= V
ref
V
o
= 12V
V
i
= 2VRMS; I
o
= 3A
f = 100Hz; V
o
= V
ref
Min.
15
Typ.
Max.
50
Unit
V
Fig.
5
input Voltage Range (pin 9)
V
o
Output Votage
5
5.1
5.2
V
5
V
o
Line Regulation
12
30
mV
5
V
o
Load Regulation
10
20
0.4
0.55
6.5
30
50
0.6
0.8
7.5
mV
mV
V
V
A
5
V
d
Dropout Voltage Between
Pin 9 and 7
Max. LimitingCurrent
5
I
7L
5.5
5
η
Efficiency
70
75
80
%
%
5
80
85
92
60
%
%
dB
5
SVR
Supply Voltage Ripple
Reject.
Switching Frequency
Voltage Stability of
Swiching Frequency
Temperature Stability of
Swiching Frequency
Maximum Operating
Switching Frequency
56
5
f
180
200
2
220
6
KHz
%
5
5
f
V
i
f
T
j
f
max
V
i
= 15V to 45V
T
j
= 0 to 125
°
C
1
%
5
V
o
= V
ref
; R
4
= 10K
I
o
= 5A; C
9
= 1nF
500
KHz
5
V
ref
SECTION(pin 14)
Symbol
V
14
V
14
V
14
V
14
T
Parameter
Test Condition
Min.
5
Typ.
5.1
10
20
0.4
Max.
5.2
25
40
Unit
V
mV
mV
mV/
°
C
Fig.
7
7
7
7
Reference Voltage
Line Regulation
Load Regulation
Average Temperature
Coefficient Reference
Voltage
Short Circuit Current Limit
V
i
= 15V to 50V
I
14
= 0 to 1mA
T
j
= 0
°
C to 125
°
C
I
14 short
V
START
SECTION(pin 15)
V
14
= 0
70
mA
7
Symbol
V
15
V
15
V
15
I
15 short
Parameter
Test Condition
Min.
11.4
Typ.
12
0.6
50
80
Max.
12.6
1.4
200
Unit
V
V
mV
mA
Fig.
7
7
7
7
Reference Voltage
Line Regulation
Load Regulation
Short Circuit Current Limit
V
i
= 15 to 50V
I
15
= 0 to 1mA
V
15
= 0V
L4975A
6/21
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|---|---|
| L4975A | 制造商:STMicroelectronics 功能描述:SWITCHING REG 5A 4975 MULTIWATT15 |
| L4975HT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
| L4976 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3 to 50V Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L4976(D) | 制造商:STMicroelectronics 功能描述:Bulk |
| L4976_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1A step down switching regulator |
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