UCD90160A: [Consultation] UCD90160ARGCR Schematic review request

By the way, here are some details of my circuit design:

1. VMON is about 1.6V divided voltage into UCD90160A for voltage sensing

2. GPIO for ENABLING external power IC has pull-down to GND with 100K ohm

3. Brownout circuit has 517uF CAP + 2200uF bulk CAP to sustain VDD (2.9V --> 2.6V)

4. GPI like below signals have over 2.2V voltage level into UCD90160A

- PGD_P50V_1_PVRM123_CS (2.2V)

- PGD_P50V_2_PVRM456_CS (2.2V)

- PGD_P50V_1_PVRM123_SEQ_R (2.47V)

- PGD_P50V_1_PVRM123_SEQ_R (2.47V)

Hi Yihe,

Can you also help to check HW design of decoupling capacitors at VDD (V33DIO1 / V33DIO2 / V33D / V33A / BPCAP) related pins ?

Please check my feedback for your questions as below:

1.Voltage devider resistors:

12V:

3V3:

50V:

2.TRST has pull-down resistor with 10K ohm to GND:

3.FPWM pins for power IC EN are all ACTIVE "high" enable function

Best Regards,

Paul Lei

Hi Yihe,

I have checked the "SLVUB50C" document for my HW SCH/layout design in previous, but I have two questions want to confirm with you as below items at last.

Thanks.

#1 If I have applied brownout circuit in my HW design, could I connect UCD90160A power supply with after Schottky diode, not directly to 3V3 power supply like file described?

SLVUB50C:

Brownout circuit in datasheet:

#2 Is it correct with my HW schematic design in comparison with SLVUB50C described (4.99ohm connect with V33D and V33A)?

Please regard my HW schematic screenshot as stuffed components, not empty parts.

SLVUB50C:

My HW design: