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L9680 Datasheet(PDF) 247 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) 247 Page - STMicroelectronics

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DocID029257 Rev 1
247/277
L9680
Electrical characteristics
276
16.15
VSF regulator
All electrical characteristics are valid for the following conditions unless otherwise noted:
-40 °C
 Ta  +95 °C, VINGOOD0  VIN  35V, VSF + 2V  ERBOOST
Table 51. VCC converter AC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max Units
1FSW_VCCBCK
VCCBUCK switching
frequency
-
1.8
1.882
2.0
MHz
2
TRISE_VCCBCKSW
TFALL_VCCBCKSW
VCCBCKSW transition time
10% to 90% voltage on
VCCBCKSW
Design Info
8
-
20
ns
3TSOFTST_VCCBCK VCCBUCK soft start time
From 10% to 90%
0.5
-
2
ms
4TFLT_VCCOV
VCC over voltage
detection deglitch filter time
-27
30
33
μs
5
TFLT_VCCOV_RAMPUP
VCC Over voltage
detection deglitch filter time
during VCC_RAMPUP state
VCC reg in VCC_RAMPUP
state
1.5
2
2.5
μs
6TFLT_VCCUV
VCC under voltage
detection deglitch filter time
-27
30
33
μs
7TFLT_VCCUVL
VCC under voltage low
detection deglitch filter time
-
1.5
2
2.5
μs
Table 52. VCC converter external components design info
No
Symbol
Component
Conditions
Min
Typ
Max
Unit
1LVCCBCK
Inductance
Min 4.7 μH nominal
3.76
-
-
μH
2
ESRLVCCBCK
Inductance resistance
-
-
-
0.25
Ω
3CBLK_VCCBCK
Output bulk capacitance
Min 4.7 μF nominal
3
-
30
μF
4
ESRCBLK_VCCBCK Bulk capacitor ESR
-
-
-
50
mΩ
Table 53. VSF regulator DC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1
VSF
Output voltage
All line, load, IO_VSF up to 6mA
SYS_CGF(VSF_V)= 0
18
20
22
V
2
All line, load, IO_VSF up to 6mA
Only in case
SYS_CTL(ER_BST_V)=1
SYS_CGF(VSF_V) = 1
23
25
27
V
3ILIM_VSF
Output load current limit
VSF = 0
7
10
13
mA
4VDO_VSF
Drop-out voltage
V(ERBOOST-VSF)
-
-
2
V
5CVSF
Output capacitance
Design Info
2.9
-
14
nF



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