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L6983 数据表(PDF) 9 Page - STMicroelectronics

部件名 L6983
功能描述  38 V, 3 A synchronous step-down converter with 17 μA quiescent current
PDF  63 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L6983 数据表(HTML) 9 Page - STMicroelectronics

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Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
TSS
Internal soft-start
1
1.3
1.6
ms
Error amplifier
VFB
Voltage feedback
Adjustable version
TJ = 25 °C
0.845
0.85
0.855
V
Adjustable version
TJ = - 40 °C ≤ TJ ≤ 125 ° (4)
0.842
0.85
0.858
V
Fixed 3.3 V version
TJ = 25 °C
3.27
3.3
3.33
V
Fixed 3.3 V version
TJ = -40 °C ≤ TJ ≤ 125 °C (4)
3.284
3.3
3.346
V
Fixed 5.0 V version
TJ = 25 °C
4.955
5.0
5.045
V
Fixed 5.0 V version
TJ = -40 °C ≤ TJ ≤ 125 °C (4)
4.93
5
5.07
V
Overvoltage protection
VOVP
Overvoltage trip (VOVP/
VREF)
115
120
125
%
VOVP_HYST
Overvoltage hysteresis
1
2
6
%
Synchronization (LNM versions only)
fCLKIN (3)
Synchronization range
200
2200
kHz
VCLKIN_TH (3)
Amplitude of
synchronization clock
2.3
V
VCLKIN_T (3)
Synchronization pulse
ON and OFF time 2.3 V
≤ VCLKIN_TH ≤ 2.5 V
VCLKIN_TH = 2.3 V
60
ns
Synchronization pulse
ON and OFF time
VCLKIN_TH > 2.5 V
20
ns
Power Good
VTHR
PGOOD threshold
Adjustable output version
TJ = -40 °C ≤ TJ ≤ 125 °C (4)
87
90
93
%
Fixed 3.3 output version
TJ = -40 °C ≤ TJ ≤ 125 °C (4)
87
90
93
%
Fixed 5.0 output version
TJ = -40 °C ≤ TJ ≤ 125 °C (4)
87
90
93
%
VTHR_HYST (4) PGOOD hysteresis
3
VPGOOD
PGOOD open collector
output
VIN > VIN_H AND
VFB < VTH
4 mA sinking load
0.4
V
2 < VIN < VIN_H
4 mA sinking load
0.8
V
L6983
Electrical characteristics
DS13116 - Rev 1
page 9/63



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