MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES

MP2155 Rev. 1.0

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16

1/26/2014

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3. FB resistor divider should be very close to FB

pin, and keep FB trace far away from noise.

Figure 3 shows an example of PCB layout for

which the reference schematic is shown on

Figure 4.

Cin

Cout

L1

R1

R2

EN

MODE

Top Layer

L1

Bottom Layer

Figure 3—PCB Layout

MP 2155

VIN

5

Vcc

8

VOUT

1

FB

10

MODE / SYNC

7

EN

6

U1

L 1

Cin

Cout

Cout

GND

GND

R2

R1

GND

GND

VIN

GND

VOUT

GND

Figure 4—Reference Circuit for PCB Guide

Design Example

Below is a design example following the

application guidelines for the specifications:

Table 1: Design Example

2-5.5

3.3V

The detailed application schematic is shown in

Figure 5 and its performance can be found in

TPC section.