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L5973D 数据表(PDF) 5 Page - STMicroelectronics

部件名 L5973D
功能描述  2.5 A switch step down switching regulator
PDF  17 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L5973D 数据表(HTML) 5 Page - STMicroelectronics

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L5973D
Electrical characteristics
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3
Electrical characteristics
Table 4.
Electrical characteristics
( TJ = 25 °C, VCC = 12 V, unless otherwise specified)
Symbol
Parameter
Test condition
Min
Typ
Max
Unit
VCC
Operating input
voltage range
Vo = 1.235 V; Io = 2 A
(1)
436
V
RDS(on)
Mosfet on
Resistance
(1)
0.250
0.5
Ω
Il
Maximum limiting
current
VCC = 4.4 V to 36 V
2.5
3
3.5
A
fs
Switching frequency
(1)
212
250
280
kHz
225
250
275
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
(1)
1.198
1.235
1.272
V
h
Efficiency
VO = 5 V, VCC = 12 V
90
%
DC characteristics
Iqop
Total operating
quiescent current
(1)
35
mA
Iq
Quiescent current
Duty Cycle = 0;
VFB = 1.5 V
2.5
mA
Iqst-by
Total stand-by
quiescent current
Vinh > 2.2 V
(1)
50
100
µA
VCC = 36 V;
Vinh > 2.2 V
(1)
80
150
µA
Inhibit
INH threshold
voltage
Device ON
0.8
V
Device OFF
2.2
V
Error amplfier
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



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