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參數(shù)資料
| 型號： | L4976 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 1A Step Down Switching Regulator(步降開關(guān)穩(wěn)壓器) |
| 中文描述： | 第1A降壓開關(guān)穩(wěn)壓器（步降開關(guān)穩(wěn)壓器） |
| 文件頁數(shù)： | 4/11頁 |
| 文件大?。?/td> | 99K |
| 代理商： | L4976 |
Symbol
Reference Section
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Reference Voltage
5.0
4.950
5.1
5.1
5.2
5.250
V
V
I
ref
= 0 to 10mA;
V
CC
= 8 to 55V
I
ref
= 0mA;
V
CC
= 8 to 55V
V
ref
= 0 to 5mA;
V
CC
= 0 to 20mA
*
Line Regulation
5
10
mV
Load Regulation
2
6
65
10
25
100
mV
mV
mA
Short Circuit Current
30
DC Characteristics
I
qop
Total operating quiescent
current
Quiescent current
Total stand-by quiescent
current
4
6
mA
I
q
Duty Cycle = 0; V
FB
= 3.8V
V
inh
<0.9V
Vcc = 55V; V
inh
<0.9V
2.5
100
150
3.5
200
300
mA
μ
A
μ
A
I
qst-by
ErrorAmplifier
V
FB
R
L
Voltage Feedback Input
Line regulation
Ref. voltage stability vs
temperature
High level output voltage
Low level output voltage
Source output current
Sink output current
Source bias current
Supply voltage ripple rejection
DC open loop gain
Transconductance
3.33
3.36
5
0.4
3.39
10
V
Vcc = 8 to 55V
mV
mV/
°
C
*
V
oH
V
oL
I
o source
I
o sink
I
b
SVRR E/A
V
FB
= 2.5V
V
FB
= 3.8V
V
comp
= 6V; V
FB
= 2.5V
V
comp
= 6V; V
FB
= 3.8V
10.3
V
V
μ
A
μ
A
μ
A
dB
dB
ms
0.65
180
200
220
300
2
80
57
2.5
3
V
comp
= V
fb
; Vcc = 8 to 55V
R
L
=
∞
I
comp
= -0.1 to 0.1mA
V
comp
= 6V
60
50
gm
OscillatorSection
Ramp Valley
Ramp peak
0.78
2
9
95
0.85
2.15
9.6
97
0.92
2.3
10.2
V
V
V
%
kHz
Vcc = 8V
Vcc = 55V
Maximum duty cycle
Maximum Frequency
Duty Cycle = 0%
R
osc
= 13k
, C
osc
= 820pF
500
ELECTRICALCHARACTERISTICS
(continued)
L4976
4/11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| L4976D | 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 |
| L4976D013TR | 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 |
| L4977 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
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