User Guide for
FEBFAN25800_MPSLDO1
FEBFAN25800_MPSLDO2
FEBFAN25801_MPSLDO1
Evaluation Board
500 mA Low-I
Q
, Low-Noise,
LDO Regulator
Featured Fairchild Product:
FAN25800, FAN25801
(FAN2580x)
Direct questions or comments
about this evaluation board to:
“Worldwide Direct Support”
Fairchild Semiconductor.com
© 2014 Fairchild Semiconductor Corporation
FEBFAN2580x_MPSLDOx • Rev. 1.2
Table of Contents
1.
Introduction ............................................................................................................................... 3
2.
Board Configuration ................................................................................................................. 3
3.
Schematic .................................................................................................................................. 4
4.
Bill of Materials ........................................................................................................................ 5
5.
Measurements ........................................................................................................................... 6
6.
Post Regulation ......................................................................................................................... 7
7.
Revision History ....................................................................................................................... 8
© 2014 Fairchild Semiconductor Corporation
2
FEBFAN2580x_MPSLDOx • Rev. 1.2
This user guide supports the evaluation kit for FAN2580x. It should be used in
conjunction with the product datasheet as well as Fairchild’s application notes and
technical support team. Please visit Fairchild’s website at
www.fairchildsemi.com
1.
Introduction
FAN2580x is a linear low-dropout (LDO) regulator with high PSRR and low output
noise supported with controlled soft-start, thermal shutdown protection, and short-circuit
protection. The enable-control pin can shutdown the device and disconnect the output
load from the input. During shutdown, the supply current drops below 1 μA. The LDO is
designed to be stable with space-saving ceramic capacitors as small as 0201 case size.
Board Part Number
FEBFAN25800_MPSLDO1
FEBFAN25800_MPSLDO2
FEBFAN25801_MPSLDO1
LDO Part Number
FAN25800AUC33X
FAN25800AUC28X
FAN25801AUC514X
V
IN
Range
2.3 V - 5.5 V
2.3 V - 5.5 V
2.3 V - 5.5 V
V
OUT
3.30 V
2.80 V
5.14 V
I
OUT
(Max.)
500 mA
250 mA
250 mA
2.
Board Configuration
The FAN2580xUCX (WLCSP) evaluation board is shown in Figure 1.
Output Noise
Measurement
Enable
Figure 1.
Top Layer
© 2014 Fairchild Semiconductor Corporation
3
FEBFAN2580x_MPSLDOx • Rev. 1.2
3.
Schematic
Figure 2.
Evaluation Board Schematic
The input capacitor (C
3
) is 1.5 µF and the two output capacitors (C
4
and C
5
) are 2x1.5 µF
(option for additional capacitors are available on the PCB.) The FAN2580x can be stable
with C
3
= C
4
= C
5
= 1 µF (0201). C1 is available to place a 100 µF ceramic capacitor
(1210), recommended to reduce noise from the inductance from long wires in a setup.
© 2014 Fairchild Semiconductor Corporation
4
FEBFAN2580x_MPSLDOx • Rev. 1.2
4.
Bill of Materials
REF
U1
QTY
1
Description
IC, FAN2580x, WLCSP-4
Manufacturer / Part Number
Fairchild / FAN25800AUC33X
Fairchild / FAN25800AUC28X
Fairchild / FAN25801UC514X
Murata / GRM033R60J155M
C3
1
1.5 µf, 6.3 V, 20%, X5R, 0201
C4, C5
2
1.5 µf, 6.3 V, 20%, X5R, 0201
Murata / GRM033R60J155M
TDK / C3225X5R0J107M250AC
C1
J1
J2
Turret
Black Banana
Connector
Red Banana Connector
1
1
1
4
2
2
100 µf, 6.3 V, 20%, X5R, 1210
3x1 Header Strip, 125C
Conn, SMA
VIN, VOUT, PGND, PGND
PGND, PGND
VIN, VOUT
Taiyo Yuden /
JMK325ABJ107MM-T
Digi-Key / SAM1098-03
Amphenol / 132255
Digi-Key / ACX1424
Digi-Key / 1502-2K-ND
Digi-Key / J152-ND
Digi-Key / J151-ND
TOTAL
15
© 2014 Fairchild Semiconductor Corporation
5
FEBFAN2580x_MPSLDOx • Rev. 1.2
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