TPS65381-Q1 Datasheet, PDF (12/63 Pages) Texas Instruments – Multi-Rail Power Supply for Microcontrollers in Safety-Critical Applications

TPS65381-Q1
SLVSBC4 – MAY 2012
www.ti.com
PIN
NAME
VCP
VDD1_G
VDD1_SENSE
VDD3/5
VDD5
VDD6
VDDIO
VSFB1
VSIN
VSOUT1
VTRACK1
Thermal pad
PIN FUNCTIONS (continued)
I/O/
NO. ^PWR/GND
DESCRIPTION
2
PWR Charge-pump output voltage
26
O
Gate of external FET for VDD1 regulator
24
I
Input reference for VDD1 regulator
21
I
VDD3/5 regulator output voltage
20
PWR VDD5 regulator output voltage
27
PWR VDD6 switch-mode regulator output voltage
22
PWR I/O-level for pins from/to MCU
15
I
Feedback input reference for sensor supply regulator
16
PWR Sensor supply regulator input supply voltage
17
PWR Sensor supply regulator output voltage
18
I
Tracking input reference for sensor supply regulator
–
Connected to GNDIO. Place thermal vias to large ground plane and connect to AGND and GNDIO
pin.
FUNCTIONAL BLOCK DIAGRAM
KL30
6V
5V, 300mA
3.3/5V, 300mA
0.8 .. 3.3V, 600mA
Schottky
Charge
Pump
Buck
Int. FET
LDO
Int. FET
LDO
Int. FET
LDO
Controller
GND
VBATP or
VDD6
VSIN
3.3V...9.5V,
100mA
VSOUT1
Sensor LDO
Protected
Int. B2B FET
VSFB1
VTRACK1
VDD5,
VDD3/5 or
GND
DIAG_OUT
Diagnostics
Bandgap 1
Bandgap 2
TPS65381
Bias /
Internal
Supply
Bandgap
Ref 1
Voltage
Monitoring
Bandgap
Ref 2
RES Ext
Oscillator
1
Oscillator
Monitor
Tj
Over-Temp
shutdown
EEPROM
CRC
Digital
State
Machine
Reset /
Enable
Q&A
Watchdog
uC ERROR
Monitor /
Window Watchdog
SPI Interface
WakeUp
VBAT_SAFING
VBATP
RSTEXT
Power Supply
Reference/Bias
Diagnostics
Safety
VDD5 or
VDD3/5
Figure 4. TPS65381-Q1 Functional Block Diagram
12
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