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L7980TR データシート(PDF) 6 Page - STMicroelectronics

部品番号 L7980TR
部品情報  2 A step-down switching regulator
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7980TR データシート(HTML) 6 Page - STMicroelectronics

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Electrical characteristics
L7980
6/44
Doc ID 15181 Rev 4
4
Electrical characteristics
TJ=25 °C, VCC=12 V, unless otherwise specified.
Table 4.
Electrical characteristics
Symbol
Parameter
Test condition
Values
Unit
Min
Typ
Max
VCC
Operating input voltage
range
(1)
4.5
28
V
VCCON
Turn on VCC threshold
(1)
4.4
VCCHYS
VCC UVLO Hysteresis
(1)
0.12
0.35
RDSON
MOSFET on resistance
160
180
m
Ω
(1)
160
250
ILIM
Maximum limiting current
2.5
3.0
3.5
A
Oscillator
FSW
Switching frequency
225
250
275
KHz
(1)
220
275
VFSW
FSW pin voltage
1.254
V
D
Duty Cycle
0
100
%
FADJ
Adjustable switching
frequency
RFSW=33kΩ
1000
KHz
Dynamic characteristics
VFB
Feedback voltage
4.5V<VCC<28V
(1)
0.593
0.6
0.607
V
DC characteristics
IQ
Quiescent current
Duty Cycle=0,
VFB=0.8V
2.4
mA
IQST-BY
Total stand-by quiescent
current
20
30
μA
Enable
EN threshold voltage
Device OFF level
0.3
V
Device ON level
1.2
EN current
EN=VCC
7.5
10
μA
Soft start
TSS
Soft start duration
FSW pin floating
7.4
8.2
9.1
ms
FSW=1MHz,
RFSW=33kΩ
2
Error amplifier


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