CS5231-3
Application Circuit Characteristics: continued
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.
The graph provided below show typical R
DS(ON)
perfor-
mance for the PFET. The data is provided as V
DS
vs I
OUT
for different values of V
AUX
.
160
140
120
100
80
Vds (mV)
V
AUX
= 3.135V
V
AUX
= 3.300V
V
AUX
= 3.465V
60
40
20
0
0
100
200
I
OUT
(mA)
300
400
500
55
50
Package Temperature (C)
Figure 8: PFET Vds vs I
OUT
45
40
35
30
25
20
0
50
100
150
200 250 300 350
Load Current (mA)
400
450
500
Figure 7: Package Temperature vs Load Current (V
IN
= 5V, T
A
=23 C°)
PFET R
DS(ON)
Performance
Application Circuit Bill of Materials
Refdes
C1, C2
Q1
U1
T1-T6
Description
33µF, 16V tantalum capacitors
p-channel FET transistor
Linear regulator with auxiliary
Turret pins
Part Number
TAJ336K016
MGSF1P02ELT1
CS5231-3DPS
40F6023
Manufacturer
AVX Corp
Motorola
Cherry Semiconductor
Newark Electronics
Contact Information
www.avxcorp.com
1-843-448-9411
www.mot-sps.com
www.cherry-sem.com
1-800-272-3601
www.newark.com
1-800-463-9275
10
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
