9 Power Supply Recommendations

The TLVM13630 is designed to operate from an input voltage supply range between 3 V and 36 V. This input

supply must be able to provide the maximum input current and maintain a voltage above the set UVLO voltage.

Ensure that the resistance of the input supply rail is low enough that an input current transient does not cause a

high enough drop at the TLVM13630 supply rail to cause a false UVLO fault triggering and system reset. If the

input supply is located more than a few inches from the TLVM13630, additional bulk capacitance can be required

in addition to the ceramic input capacitance. A 47-μF electrolytic capacitor is a typical choice for this function,

whereby the capacitor ESR provides a level of damping against input filter resonances. A typical ESR of 0.5 Ω

provides enough damping for most input circuit configurations.

10 Layout

The performance of any switching power supply depends as much upon the layout of the PCB as the component

selection. Use the following guidelines to design a PCB with the best power conversion performance, optimal

thermal performance, and minimal generation of unwanted EMI.

10.1 Layout Guidelines

To achieve optimal electrical and thermal performance, an optimized PCB layout is required. Figure 10-1 and

Figure 10-2 show a typical PCB layout. Some considerations for an optimized layout are:

• Use large copper areas for power planes (VIN, VOUT, and GND) to minimize conduction loss and thermal

stress.

• Place ceramic input and output capacitors close to the device pins to minimize high-frequency noise.

• Locate additional output capacitors between the ceramic capacitors and the load.

• Connect AGND to PGND at a single point.

• Use multiple vias to connect the power planes to internal layers.

10.2 Layout Example

Figure 10-1. Typical Top-Layer Layout

Figure 10-2. Typical Top Layer

10.2.1 Package Specifications

Table 10-1. Package Specifications Table

TLVM13630

VALUE

UNIT

Weight

123

mg

Flammability

Meets UL 94 V-0

MTBF Calculated Reliability

tbd

MHrs

www.ti.com

TLVM13630

SLVSFT6 – MAY 2021

Copyright © 2021 Texas Instruments Incorporated

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Product Folder Links: TLVM13630