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參數(shù)資料
| 型號： | L4976D |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 1A STEP DOWN SWITCHING REGULATOR |
| 中文描述： | 第1A降壓開關(guān)穩(wěn)壓器 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大?。?/td> | 100K |
| 代理商： | L4976D |
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
10
25
100
mV
mV
mA
Short Circuit Current
30
65
DC Characteristics
I
qop
Total operating quiescent
current
Quiescent current
4
6
mA
I
q
Duty Cycle = 0; V
FB
= 3.8V
2.5
3.5
mA
Error Amplifier
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
ELECTRICAL CHARACTERISTICS
(continued)
L4976
4/11
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