MPS MP20045DN Low noise, 1a, linear regulator ev board Datasheet

EV20045DN-00A
Low Noise, 1A, Linear
Regulator EV Board
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The
EV20045DN-00A
evaluation
board
demonstrates the performance of MP20045, a
low noise and low dropout linear regulator. It
operates from a 2.5V to 5.5V input voltage and
the output voltage can be set externally which
ranges from 1.5V to 5V.
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•
•
•
•
•
•
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The EV20045DN-00A can supply up to 1A of
load current, and features current limiting, over
temperature protection and power-good status.
An internal PMOS pass element is used to
allow a low 110uA ground current, marking the
MP20045 suitable for battery-power devices.
ELECTRICAL SPECIFICATIONS
Parameter
Symbol
Value
Units
VIN
3.5 – 5.5
V
Output Voltage
VOUT
3
V
Load Current
IOUT
1
A
Input Voltage
Up to 1A Output Current
Low 140mV Dropout at 1A
Adjustable Output
56dB PSRR at 1kHz
13μVRMS Low Noise Output
Open Drain Power-Good Status Output
Very Fast Transient Responses
Current Limit and Thermal Protection
APPLICATIONS
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Notebook Computers
Cordless Telephones
Cellular Phones
Modems
Hand-Held Instruments
PDA and Palmtop Computers
MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
EV20045DN-00A EVALUATION BOARD
(L x W x H) 2.5” x 2.5” x 0.4”
(6.35cm x 6.35cm x 1.1cm)
EV20045DN-00A Rev. 1.0
11/3/2009
Board Number
MPS IC Number
EV20045DN-00A
MP20045DN
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
1
EV20045DN-00A – LOW NOISE, 1A LINEAR REGULATOR
EVALUATION BOARD SCHEMATIC
PG
U1
7,8
VIN
C1
NS
R3
100k
VOUT
1,2
EN
GND
4
VOUT
R1
10k
MP20045
6
EN
5
PG
VIN
R4
100k
FB
COUT
NS
3
R2
10k
EV20045DN-00A BILL OF MATERIALS
Qty
Ref
Value
1
CIN
10uF
1
C2
2.2uF
1
C3
100pF
0
C1,COUT
NS
2
R1, R2
10kΩ
2
R3, R4
100kΩ
1
U1
EV20045DN-00A Rev. 1.0
11/3/2009
Description
Ceramic
Capacitor,X7R,16V
Ceramic
Capacitor,X7R,16V
Ceramic
Capacitor,C0G,50V
Film Res, 1%
Film Res, 5%
LDO Regulator
Package
Manufacturer
1210
TDK
C3225X7R1C106M
0805
TDK
C2012X7R1C225K
0603
TDK
C1608C0G1H101J
0603
Any
0603
Any
SOIC8E
MPS
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
Part Number
MP20045DN
2
EV20045DN-00A – LOW NOISE, 1A LINEAR REGULATOR
PRINTED CIRCUIT BOARD LAYOUT
Figure 1—Top Layer
Figure 2—Bottom Layer
Figure 3—Top Silk Layer
EV20045DN-00A Rev. 1.0
11/3/2009
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
3
EV20045DN-00A – LOW NOISE, 1A LINEAR REGULATOR
QUICK START GUIDE (ADJUSTABLE OUTPUT)
The output voltage of this board is set externally which ranges from 1.5V to 5V by operating from +2.5V
to +5.5V input as the figure 4. The default output voltage of this board is set to 3.0V.
The board layout accommodates most commonly used resistors and capacitors.
1. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively.
2. Attach the Input Voltage (3.5V ≤ VIN ≤ 5.5V) and Input Ground to the VIN and GND pins,
respectively.
3. To enable the MP20045, apply a voltage, 1.5V ≤ VEN ≤ 5.5V, to the EN pin. To disable the MP20045,
apply a voltage, VEN < 0.4V, to the EN pin. The EN pin can be connected to VIN with a 100kΩ
resistor for automatic startup.
4. The Output Voltage VOUT can be changed by varying R2. Calculate the new value by formula:
R1
R2 =
(
VOUT
) −1
VFB
Where VFB = 1.5V and R1 = 10kΩ.
Example:
For VOUT = 3.0V:
R2 =
10kΩ
= 10kΩ
3.0
(
) −1
1.5
Therefore, use a 10kΩ standard 1% value.
VIN
R3
100k
VOUT
R1
PG
C3(optioanl)
0.1
MP20045 FB
R2
EN
COUT
2.2
VIN
R3
100k
VOUT
CIN
10
PG
MP20045 FB
EN
COUT
2.2
R1
VOUT =1.5 × (1+ R )Volts
2
Figure 4—Adjustable Version
EV20045DN-00A Rev. 1.0
11/3/2009
Figure 5—Fixed Version
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
4
EV20045DN-00A – LOW NOISE, 1A LINEAR REGULATOR
QUICK START GUIDE (MODIFICATION FOR FIXED OUTPUT)
For modifying the EV20045DN-00A to accommodate a fixed output voltage version of the MP20045 as
the figure 5:
1. Carefully remove the IC(U1) and replace it with the corresponding fixed output version of the
MP20045 chip.
2. Remove both R1 and R2.
3. Short R1 while leaving R2 open.
4. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively.
5. Attach the Input Voltage (3.5V ≤ VIN ≤ 5.5V) and Input Ground to the VIN and GND pins,
respectively.
6. To enable the MP20045, apply a voltage, 1.5V ≤ VEN ≤ 5.5V, to the EN pin. To disable the MP20045,
apply a voltage, VEN < 0.4V, to the EN pin. The EN pin can be connected to VIN with a 100kΩ
resistor for automatic startup.
Please refer to the datasheet for the detailed information of the different output voltage option of
MP20045.
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
EV20045DN-00A Rev. 1.0
11/3/2009
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
5
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