Sensor Cluster Power Architecture
- Michael Botros
EPC611-CSP24-001
Power Rail | Voltage Range | Voltage Typ | Voltage Ripple | Current |
|---|---|---|---|---|
VDD | 8V to 9V | 8.5V | <±100mV | 18mA |
VDDIO | 2.43V to 5.5V | 3.3V | <±50mV | 100uA |
VDDBS | -11.5V to -10.5V | -11V | <±50mV | 2mA |
A121-001-T&R
Power Rail | Voltage Range | Voltage Typ | Voltage Ripple | Current |
|---|---|---|---|---|
VRX | 1.71V to 1.89V | 1.8V | Not specified | 100mA max from all rails |
VTX | 1.71V to 1.89V | 1.8V | ||
VDIG | 1.71V to 1.89V | 1.8V | ||
VIO | 1.71V to 1.89V | 1.8V or 3.3V |
ICP-20100
Power Rail | Voltage Range | Voltage Typ | Voltage Ripple | Current |
|---|---|---|---|---|
VDD | 1.62V to 1.98V 2.97V to 3.63V | 1.8V or 3.3V | Not specified | 250uA |
VDDIO | 1.08V to 1.32V 1.62V to 1.98V 2.97V to 3.83V | 1.2V or 1.8V or 3.3V |
ICM-42688-P
Power Rail | Voltage Range | Voltage Typ | Voltage Ripple | Current |
|---|---|---|---|---|
VDD | 1.71V to 3.6V | 1.8V | Not specified | 0.88mA |
VDDIO | 1.71V to 3.6V | 1.8V |
MLX90393SLW-ABA-011-RE
Power Rail | Voltage Range | Voltage Typ | Voltage Ripple | Current |
|---|---|---|---|---|
VDD | 2.2V to 3.6V | 3V | Not specified | <10mA |
VDDIO | 1.65V to VDD | 1.8V |
PAA3905E1-Q
Power Rail | Voltage Range | Voltage Typ | Voltage Ripple | Current |
|---|---|---|---|---|
VDD | 1.8V to 2.0V | 1.9V | See datasheet | See datasheet |
VDDIO | 1.8V to 3.6V | 1.9V |
STM32L4P5CE
Power Rail | Voltage Range | Voltage Typ | Voltage Ripple | Current |
|---|---|---|---|---|
VDD | 1.71V to 3.6V | Not specified | Not specified | Max 200mA into all VDD rails. Max 100mA into any individual VDD rail. |
VDD12 | 1.14V to 1.32V | |||
VDDIO2 | 1.08V to 3.6V | |||
VDDA | 2.4V to 3.6V | |||
VBAT | 1.55V to 3.6V | |||
VDDUSB | 3.0V to 3.6V | |||
VIN | -0.3V to MIN(VDD, VDDA, VDDIO2, VDDUSB)+3.6 V and 5.5V |
Required Voltage Levels
8.5V @ 18mA
https://www.digikey.ca/en/products/detail/microchip-technology/MIC2619YD6-TR/2242454
3.3V @ ~200mA
https://www.digikey.ca/en/products/detail/analog-devices-inc/ADP323ACPZ-R7/2507288
1.9V @ ~100mA
https://www.digikey.ca/en/products/detail/analog-devices-inc/ADP323ACPZ-R7/2507288
1.8V @ ~200mA
https://www.digikey.ca/en/products/detail/analog-devices-inc/ADP323ACPZ-R7/2507288
-11V @ 2mA
https://www.digikey.ca/en/products/detail/texas-instruments/TPS63700DRCR/1672393
MIC2619YD6-TR 8.5V
Choose R4 = 154k, R5 = 27k
Choose R1 = 110k, R2 = 18k
Choose L = 22uH
https://www.digikey.ca/en/products/detail/taiyo-yuden/CBL2012T220M/957989
Use SL03 diode from Vishay for switching Schottky diode
For Inductor, use https://www.ti.com/lit/an/slva372d/slva372d.pdf?ts=1720241540731 for calculations
TPS63700DRCR -11V
Vout = -11V
Vref = 1.213V
R2 = 127kOhm
R3 = 1150kOhm
Vin = 5V
Vout = -11V
f = 1.4MHz
L = 10uH
deltaI = 245mA pk-pk
For input capacitor:
Use 2*10uF, 1uF and 100nF
For output capacitor
f = 1.4MHz, deltaV = 15mV, Iout = 10mA, Vin = 5V, Vout = -11V
Cmin = 0.33uF
Use one 10uF + 1uF to be safe
Add 10pF feedforward cap with 100kOhm in series to boost controller speed
Add 4.7nF cap to comp pin
Use SL03 diode from Vishay for switching Schottky diode
ADP323ACPZ-R7 3V3, 1V9, 1V8
Concern with 200mA rated current of LDO for MCU + 100mA from Radar.
Tj = 25C + ((0.34W+0.32W)*49.5C/W) = 57.67C
Junction temp limit is 125C, other sources consume minimal current. Thermal is not a concern for this regulator.
Datasheet recommends at 1uF effective CIN and COUT
For feedback divider:
For Vout1, set R1 to 56kOhm and R2 to 10kOhm
For Vout2, set R3 to 133kOhm and R4 to 51kOhm
For Vout3, set R5 to 56kOhm and R6 to 20kOhm