CS5231-3GDPR5 datasheet(10/11 Pages) CHERRY

10 / 11 page

Application Circuit Bill of Materials

Application Circuit Characteristics: continued

Refdes

Description

Part Number

Manufacturer

Contact Information

C1, C2

33µF, 16V tantalum capacitors

TAJ336K016

AVX Corp

www.avxcorp.com

1-843-448-9411

p-channel FET transistor

MGSF1P02ELT1

Motorola

www.mot-sps.com

Linear regulator with auxiliary

CS5231-3DPS

Cherry Semiconductor

www.cherry-sem.com

1-800-272-3601

T1-T6

Turret pins

40F6023

Newark Electronics

www.newark.com

1-800-463-9275

Test Descriptions

The startup and supply transition waveforms shown in fig-

ures 1 through 4b were obtained using the application cir-

cuit board with a resistive load of 8.8Ω. This provides a DC

load of 375mA when the regulated output voltage is 3.3V.

A standard 2A bench supply was used to provide power to

the application circuit. The transient response waveforms

shown in the Typical Performance Characteristics section

were obtained by switching a 6.3Ω resistor across the out-

put.

Temperature Performance

The graph below shows thermal performance for the

CS5231-3 across the normal operating output current range.

Figure 7: Package Temperature vs Load Current (VIN = 5V, TA =23 C°)

PFET RDS(ON) Performance

The graph provided below show typical RDS(ON) perfor-

mance for the PFET. The data is provided as VDS vs IOUT

for different values of VAUX.

Figure 8: PFET Vds vs IOUT

140

120

100

200

300

400

500

IOUT (mA)

160

VAUX = 3.465V

VAUX = 3.135V

VAUX = 3.300V

100

150

200

250

300

350

400

450

500

Load Current (mA)

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