TLV62565

2.7V to 5.5V

V

IN

FB

VIN

GND

EN

SW

C2

10µF

V

OUT

1.2V

L1

2.2µH

C1

4.7µF

R1

120k

R2

120k

TLV62565, TLV62566

www.ti.com

SLVSBC1C – OCTOBER 2013 – REVISED JULY 2015

11 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

11.1 Application Information

The TLV6256x devices are synchronous step-down converters optimized for small solution size and high

efficiency. The devices integrate switches capable of delivering an output current up to 1.5 A.

11.2 Typical Application

TLV62565 2.7-V to 5.5-V input, 1.2-V output converter.

Figure 15. TLV62565 1.2-V Output Application

11.2.1 Design Requirements

11.2.1.1 Output Filter Design

The inductor and output capacitor together provide a low-pass frequency filter. To simplify this process, Table 3

outlines possible inductor and capacitor value combinations.

Table 3. Matrix of Output Capacitor and Inductor Combinations

(2) (3)

4.7

10

22

47

100

1

2.2

4.7

(1)

Inductor tolerance and current de-rating is anticipated. The effective inductance can vary by +20% and

-30%.

(2)

Capacitance tolerance and bias voltage de-rating is anticipated. The effective capacitance can vary by

+20% and -50%.

(3)

For low output voltage applications (

≤ 1.2 V), more output capacitance is recommended (usually ≥ 22

µF) for smaller ripple.

(4)

Typical application configuration. '+' indicates recommended filter combinations.

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