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L6982 数据表(PDF) 6 Page - STMicroelectronics

部件名 L6982
功能描述  38 V, 2 A synchronous step-down converter with low quiescent current
PDF  48 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L6982 数据表(HTML) 6 Page - STMicroelectronics

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5
Electrical characteristics
Table 6. Electrical characteristics TJ = 25 °C, VIN = 24 V unless otherwise specified.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VIN
Operating input voltage range
3.5
38
V
VINH
VCC rising threshold
2.3
3.3
V
VINL
VCC UVLO falling threshold
2.15
3.15
V
IPK (1)
Peak current limit
No slope contribution
2.73
3
A
Full slope contribution
2.05
2.33
A
IVY
Valley current limit
2.2
2.6
3
A
ISKIP (1)(2)
Skip current limit
0.45
A
IVY_SINK (1)
Reverse current limit
LNM or VOUT overvoltage
1.25
1.5
1.75
A
RDSON_HS
High side RDSON
0.175
Ω
RDSON_LS
Low-side RDSON
0.125
Ω
FSW (3)
Switching frequency
360
400
440
KHz
TOFF_MIN
Minimum off time
185
ns
TON_MIN
Minimum on time
85
ns
Enable
VWAKE_UP
Wakeup threshold
Rising
0.7
V
Falling
0.2
V
VEN
Enable threshold
Rising
1.08
1.2
1.32
V
Hysteresis
0.2
V
VCC regulator
VCC
LDO output voltage
3.0
3.3
3.6
V
Power consumption
ISHTDWN
Shutdown current from VIN
EN = GND
2
3
μA
LCM Device
IQ_OPVIN
Quiescent current from VIN
20
35
60
μA
LNM Device
IQ_OPVIN
Quiescent current from VIN
1.6
2.3
3
mA
Soft start
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 °C
0.842
0.85
0.858
V
Over voltage protection
VOVP
Overvoltage trip (VOVP/VREF)
115
120
125
%
L6982
Electrical characteristics
DS13683 - Rev 1
page 6/48



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