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L7983 Arkusz danych(PDF) 7 Page - STMicroelectronics

Numer części L7983
Szczegółowy opis  60 V, 300 mA synchronous step-down switching regulator with 10 μA quiescent current
PDF  43 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7983 Arkusz danych(HTML) 7 Page - STMicroelectronics

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4
Electrical characteristics
TJ = 25 °C, VIN = 24 V, VEN/UVLO = VIN, LNM selected, fSW = 1 MHz unless otherwise specified.
Table 6. Electrical characteristics
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Turn on and power section characteristics
VINH
VIN turn-on
VIN rising
2.6
2.8
3.0
V
VINL
VIN turn-off
VIN falling
2.5
2.7
2.9
Hysteresis
0.1
VWAKEUPH Wake-up ON threshold
VEN rising
0.7
V
VWAKEUPL
Wake-up OFF threshold
VEN falling
0.2
VENH
Enable ON threshold
VEN rising
1.1
1.2
1.3
VENL
Enable OFF threshold
VEN falling
0.9
1.0
1.1
Hysteresis
0.2
IPK
Peak current limit
Duty cycle < 20% (1)
0.42
0.47
0.52
A
Duty cycle = 100%, closed loop operation (1)
0.35
0.39
0.43
IVY
Valley current limit
(1)
0.43
0.52
0.61
ISKIP
Skip current limit
(1)
0.08
INEG
Reverse current limit
LNM selected, VFB = 0.9 V (1)
- 0.15
HS RDSON HS MOS ON resistance
ILX = 0.2 A
1.9
2.5
Ω
LS RDSON
LS MOS ON resistance
ILX = 0.2 A
0.85
1.2
fSW
Selected switching frequency
RFSW = 5.6 kΩ
450
500
550
kHz
RFSW = 0 Ω
900
1000
1100
RFSW = 56 kΩ
1980
2200
2420
D
Duty cycle
0
100
%
tON MIN
Minimum HS MOS on-time
60
ns
tSS
Internal soft-start time
1.3
2
2.7
ms
VCC and VBIAS
VCC
LDO output voltage
VBIAS = GND
2.9
3.3
3.6
V
VBIAS = 5 V
2.9
3.3
3.6
SWO
Switchover threshold
VBIAS increasing
3.2
V
Hysteresis
0.075
V
Power consumption
ISHTDWN
Shutdown current from VIN
VEN/UVLO = GND
2.3
3.2
µA
IQVIN
Quiescent current from VIN, LCM
(refer to Section 5.5 VCC and
switchover)
VBIAS = 5 V, VOUT = 1.05 * VREF(2)
3
6
VBIAS = GND, VOUT = 1.05 * VREF(2)
35
50
Quiescent current from VIN, LNM
VBIAS = 5 V, VOUT = 1.05 * VREF
170
205
VBIAS = GND, VOUT = 1.05 * VREF
1300
1500
L7983
Electrical characteristics
DS13354 - Rev 1
page 7/43



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