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L7986TR Fiches technique(PDF) 6 Page - STMicroelectronics

No de pièce L7986TR
Description  3 A step-down switching regulator
Download  43 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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Electrical characteristics
L7986
6/43
DocID022450 Rev 6
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
38
V
VCCON
Turn-on VCC threshold
(1)
4.5
VCCHYS
VCC UVLO hysteseris
(1)
0.1
0.4
RDSON
MOSFET on resistance
200
m
(1)
400
ILIM
Maximum limiting current
3.7
4.2
4.7
A
Oscillator
FSW
Switching frequency
(1)
210
250
275
KHz
VFSW
FSW pin voltage
1.254
V
D
Duty cycle
0
100
%
FADJ
Adjustable switching frequency RFSW = 33 k
1000
KHz
Dynamic characteristics
VFB
Feedback voltage
4.5 V < VCC < 38 V
0.593
0.6
0.607
V
4.5 V < VCC < 38 V(1)
0.582
0.6
0.618
DC characteristics
IQ
Quiescent current
Duty cycle = 0, VFB = 0.8 V
2.4
mA
IQST-BY
Total standby quiescent current
20
30
A
Enable
VEN
EN threshold voltage
Device OFF level
0.3
V
Device ON level
1.2
IEN
EN current
EN = VCC
7.5
10
A
Soft start
TSS
Soft-start duration
FSW pin floating
7.4
8.2
9.1
ms
FSW = 1 MHz, RFSW = 33 k
2
Error amplifier
VCH
High level output voltage
VFB < 0.6 V
3
V
VCL
Low level output voltage
VFB > 0.6 V
0.1
IO SOURCE Source COMP pin
VFB = 0.5 V, VCOMP = 1 V
19
mA


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