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L9758 Datasheet(PDF) 14 Page - STMicroelectronics

Part # L9758
Description  Automotive multiple supply for engine control
PDF  30 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9758 Datasheet(HTML) 14 Page - STMicroelectronics

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Electrical characteristics
L9758
14/30
DocID14273 Rev 5
4.3
Boost pre-regulator
Tamb = -40 °C to 125 °C, VBAT = VBAT_SW = 5.5 to 26.5 V, unless otherwise specified.
Table 9. Boost pre-regulator
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
FSW
Operating frequency
Rext = 10.0 kΩ ±1%
VBAT_SW = 13.5 V
300
-
450
kHz
VB_REG
Output voltage
4.0 V < VBAT_S < 7 V, 0.25 A < IVB < 2.0 A
8.5
-
10
V
BoostONth Boost enable threshold
Voltage sensed at VBAT_S pin
7.0
-
8.3
V
BoostOFFth Boost disable threshold
7.0
-
8.3
V
VBOOST_HY
Boost operation threshold
hysteresis
Voltage sensed at VBAT_S pin
0.05
-
0.9
V
VBOOST Load regulation
ΔIVB = 0.1 A–2 A VBAT_S = 4 V
-
-
600
mV
VR_VBOOST Voltage ripple, p-p
L = 22 μH, C = 300 μF X7RX7R
VBAT_S = 4 V
-
-
600
mV
VOLB
Boost predriver low level
voltage
Isink = 1 mA
-
-
0.2
V
VOHB
Boost predriver low level
voltage
Isource = 200 μA
4.8
-
-
V
TRB
Boost predriver rise time
Cl = 1 nF
50
-
180
ns
TFB
Boost predriver fall time
Cl = 1 nF
20
-
100
ns
L
Rs
Output inductance
-
15
22
30
75
μH
mΩ
C
ESR
Output capacitance
-
100
10
300
900
200
μF
mΩ
RSENSE
Sensing resistor
-
40
50
-
mΩ



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