TLV751: TLV751 : Review Request

Jefin George

Part Number: TLV751

Tool/software:

We are designing a dual LDO circuit for the camera module that incorporates the CMOS sensor OV5640. For this purpose, we are using the TLV751. The output requirements are 1.8V and 2.8V. V_OUT_CAM_1P8 should be enabled first, followed by V_OUT_CAM_2P8 after a delay of a few microseconds.

Could you please review the attached schematic? Additionally, the camera connector image is included for your reference.

over 1 year ago

+1 Jaime Flores over 1 year ago

TI__Intellectual 860 points

Jefin,

Give me until EOD tomorrow to have this reviewed.

Best,

Jaime

0 Jaime Flores over 1 year ago

TI__Intellectual 860 points

Jefin,

There is no immediate issues seen in the schematic.

CIN/COUT values are sized correctly per the datasheet
FB resistor values are sized correctly per the VFB values listed in the schematic

I don't see any immediate issue's with implementing the delay for V_OUT_CAM_2P8 by using V_OUT_CAM_1P8 as the enable signal. Alternatively, you can increase startup time for VOUT2 through the use of a CFF cap as discussed in Pros and Cons of Using a Feedforward Capacitor with a Low-Dropout Regulator. Section 2.1 discusses how using a larger CFF can increase startup time.

Best,
Jaime

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TLV751: TLV751 : Review Request