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L9758 датащи(PDF) 13 Page - STMicroelectronics

номер детали L9758
подробное описание детали  Automotive multiple supply for engine control
PDF  30 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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L9758 датащи(HTML) 13 Page - STMicroelectronics

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L9758
Electrical characteristics
29
4.2
BUCK pre-regulator
Tamb = -40 °C to 125 °C, VBAT = VBAT_SW = 5.5 to 26.5 V; unless otherwise specified.
Table 8. BUCK 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
RdsON
High side switch ON
resistance
VBAT_SW = 6.0 V
-
-
0.25
Ω
IST_MAX
Average current during
start-up
VB = 3.0V
0.3
-
0.7
A
VBREG
Output voltage
7.0 V < VBAT_SW < 18 V
0.25 A < IVBAT <2.0 A
5.5
-
6.1
V
Vb100
100% Duty Cycle operation
threshold
Voltage sensed at VBAT_SW pin
6.2
-
7.8
V
Vb100h
100% Duty Cycle operation
threshold hysteresis
0.05
-
0.8
V
Vpre
Load regulation
ΔIVB = 0.1 A –2 A VBAT_SW = 13.5 V
-
-
400
mV
Vrpre
Voltage ripple, p-p
L = 22 μH, C = 22 μF X7R
VBAT_SW = 13.5 V
-
-
300
mV
Ts
Start time
L = 22 μH, C = 22 μF X7R
-
-
1.4
ms
DCmin
Minimum duty cycle
-
10
-
18
%
EFF
Efficiency
VBAT_SW = 13.5 V IVB = 0.5 A
VBAT_SW = 13.5 V IVB = 2 A
70
70
--
%
L
Rs
Output Inductance
-
15
22
30
75
μH
mΩ
C
ESR
Output capacitance
-
10
0
-
100
160
μF
mΩ
Ov
Power-up overvoltage
VBAT_SW < 26.5 V
0.25 A < IVBAT <2.0 A
15
-
200
mV
Tr_sw
Tf_sw
SW rising and falling time
7.0 V < VBAT_SW < 18 V
IVBAT <2.0 A (20%, 80%)
10
-
150
μs



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