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参数资料
| 型号： | L5973AD |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 2.3 A SWITCHING REGULATOR, PDSO8 |
| 封装： | EXPOSED PAD, HSOP-8 |
| 文件页数： | 18/22页 |
| 文件大小： | 486K |
| 代理商： | L5973AD |
L5973AD
Electrical characteristics
Doc ID 9552 Rev 9
5/22
3
Electrical characteristics
TJ = 25 °C, VCC = 12 V, unless otherwise specified
Table 4.
Electrical characteristics
Symbol
Parameter
Test condition
Min
Typ
Max
Unit
VCC
Operating input voltage
range
Vo = 1.235 V; Io = 2 A
436
V
RDS(on)
MOSFET on
resistance
0.250
0.5
Ω
Il
Maximum limiting
current
VCC = 4.4 V to 36 V
22.3
3.5
A
fs
Switching frequency
500
kHz
Duty cycle
0
100
%
Dynamic characteristics (see test circuit).
V5
Voltage feedback
4.4 V < VCC < 36 V,
20 mA < IO < 2 A
1.220
1.235
1.25
V
η
Efficiency
VO = 5 V, VCC = 12 V
90
%
DC characteristics
Iqop
Total operating
quiescent current
57
mA
Iq
Quiescent current
Duty cycle = 0;
VFB = 1.5 V
2.7
mA
Iqst-by
Total stand-by
quiescent current
Vinh > 2.2 V
50
100
μA
Inhibit
INH threshold voltage
Device ON
0.8
V
Device OFF
2.2
V
Error amplifier
VOH
High level output
voltage
VFB = 1 V
3.5
V
VOL
Low level output
voltage
VFB = 1.5 V
0.4
V
Io source
Source output current
VCOMP = 1.9 V;
VFB = 1 V
200
300
μA
Io sink
Sink output current
VCOMP = 1.9 V;
VFB = 1.5 V
11.5
mA
Ib
Source bias current
2.5
4
μA
DC open loop gain
RL = ∞
50
57
dB
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