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L7986TA датащи(PDF) 6 Page - STMicroelectronics

номер детали L7986TA
подробное описание детали  3 A step-down switching regulator
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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Electrical characteristics
L7986TA
6/43
Doc ID 022098 Rev 3
4
Electrical characteristics
TJ=-40 °C to 125 °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
4.5
38
V
VCCON
Turn-on VCC threshold
4.5
VCCHYS
VCC UVLO hysteresis
0.1
0.4
RDSON
MOSFET on resistance
200
400
m
Ω
ILIM
Maximum limiting current
TJ=25 °C
3.7
4.2
4.7
A
3.5
4.7
Oscillator
FSW
Switching frequency
210
250
275
KHz
VFSW
FSW pin voltage
1.254
V
DDuty Cycle
0
100
%
FADJ
Adjustable switching
frequency
RFSW=33 kΩ
1000
KHz
Dynamic characteristics
VFB
Feedback voltage
4.5 V<VCC<38 V
0.582
0.6
0.618
V
DC characteristics
IQ
Quiescent current
Duty Cycle=0, VFB=0.8
V
2.4
mA
IQST-BY
Total standby quiescent
current
20
30
μA
Enable
VEN
EN threshold voltage
Device OFF level
0.3
V
Device ON level
1.2
IEN
EN current
EN=VCC
7.5
10
μA
Soft-start
TSS
Soft-start duration
FSW pin floating
7.4
8.2
9.7
ms
FSW=1 MHz,
RFSW=33 kΩ
2


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