Specifications

L506 Hardware Design

NO.

Manufacturer

Part Number

Power

Package

On semi

MMSZ5231BT1G

500mW

SOD123

Prisemi

PZ3D4V2H

500mW

SOD123

Vishay

MMSZ4689-V

500mW

SOD123

Crownpo

CDZ55C5V1SM

500mW

0805

3.4.4 Recommended Power supply circuit

If the voltage difference is not big,We recommend DCDC or LDO is used for the power supply of the

module, make sure that the peak current of power components can rise up to more than 2A. The

following figure is the reference design of +5V input linear regulator power supply. The designed

output for the power supply is 3.8V.

Figure 3-4 Reference circuit of the LDO power supply

If there is a big difference between the input voltage and the desired output (VBAT) or better

efficiency ismore important, a switching converter power supply will be preferable. The following

figure is thereference circuit.

Figure 3-5 Reference circuit of the DCDC power supply

Note: DCDC may deprave RF performance because of ripple current intrinsically.

3.4.5 Power Supply Layout guide

The layout of the power supply section and the related components is of vital importance in the power

module design. If processes this part layout is not good, will lead to various effects, such as bad EMC,