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L9680 Datasheet(PDF) 245 Page - STMicroelectronics

Part # L9680
Description  Automotive advanced airbag IC for mid/high end applications
PDF  277 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9680 Datasheet(HTML) 245 Page - STMicroelectronics

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DocID029257 Rev 1
245/277
L9680
Electrical characteristics
276
16.14
VCC regulator
All electrical characteristics are valid for the following conditions unless otherwise noted:
-40 °C
 Ta  +95 °C, VINGOOD0  VIN  35 V, VSATBCK_OK  SATBUCK
VUV_VCOREMON  VCOREMON  VOV_VCOREMON
Table 48. SATBUCK converter AC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max Units
1FSW_SATBCK
SATBUCK switching
frequency
-
1.8
1.882
2.0
MHz
2
TRISE_SATBCKSW
_SLOW
TFALL_SATBCKSW
_SLOW
SATBCKSW transition time
10% to 90% voltage on
SATBCKSW
VSYNCBST <
VSYNCBST_RESTART_TH
Design Info
10
-
25
ns
3
TRISE_SATBCKSW
_FAST
TFALL_SATBCKSW
_FAST
10% to 90% voltage on
SATBCKSW
VSYNCBST >
VSYNCBST_RESTART_TH
Design Info
5-
15
4TSOFTST_SATBCK SATBUCK soft start time
From 10% to 90%
0.50
-
2
ms
Table 49. SATBUCK converter external components design info
No
Symbol
Component
Conditions
Min
Typ
Max
Unit
1LSATBCK
Inductance
Min 4.7 μH nominal
3.76
-
-
μH
2
ESRLSATBCK
Inductance Resistance
-
-
-
0.25
Ω
3CBLK_SATBCK
Output Bulk Capacitance
Min 4.7 μH nominal
3
-
30
μF
4
ESRCBLK_SATBCK Bulk Capacitor ESR
-
-
-
50
mΩ
Table 50. VCC converter DC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Units
1
VO_VCC
VCCBUCK Output
Voltage
Across all line and load,
steady state
VCCSEL < VTH1_L_VCCSEL
3.20
3.3
3.40
V
2
Across all line and load,
steady state
VCCSEL = > VTH1_H_VCCSEL
4.85
5
5.15
V



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