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L9300 데이터시트(PDF) 45 Page - STMicroelectronics

부품명 L9300
상세설명  Automotive flexible U-chip for braking and transmission
PDF  178 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9300 데이터시트(HTML) 45 Page - STMicroelectronics

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9.3
Internal Supply
9.3.1
Internal supply functional description
The internal supply partitioning consists of two different supply domains: one includes the digital core and the
other is used for the analog functions. Both the supply domains are achieved directly from protected battery line
and are monitored using independent references to always ensure proper functionality of the device. In case a
fault happens on either the analog or digital supply a power on reset (POR) is generated both forcing the device in
reset state with all the outputs disabled and causing RES1, RES2 assertion.
Figure 26. Internal supply concept
GADG1707171321PS
VBG1
(reference)
V3V3PRE
VBATP
WAKE
VBG2
(reference)
VBG2
VBG2
V33_DIG
DIGITAL blocks
ANALOG blocks
V33_DIG
Monitor
V33_AN
Monitor
VBG1
+
-
+
-
+
-
+
-
V33_AN
9.3.2
Internal supply electrical characteristics
5.5 V ≤ VBATP ≤ 19 V; -40 °C ≤ Tj ≤ 175 °C, unless otherwise noticed. All voltages referred to GND pin.
Table 21. Internal supply electrical characteristics
Symbol
Parameter
Test condition
Min
Typ
Max
Unit
Internal Supply
VBG1
Internal band-gap reference
Design info, not tested
1.214
V
VBG2
Internal band-gap reference for monitor circuits
Design info, not tested
1.214
V
V33_AN
Internal 3v3 reference for analog
Design info, not tested
3
3.3
3.6
V
V33_DIG
Internal 3v3 reference for digital
Design info, not tested
3
3.3
3.6
V
Diagnostic
V33_AN_uv
V33_AN Power On Reset threshold
2.6
3
V
V33_DIG_uv
V33_DIG Power On Reset threshold
Guaranteed by design
1.5
2.6
V
POR_flt
Power On Reset analog deglitch
2
15
µs
L9300
Reset
DS12258 - Rev 5
page 45/178



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