MPS EV2101DQ-00A

TM
EV2101DQ-00A
1.6MHz, 800mA Synchronous
Step-Down Converter plus 200mA LDO
The Future of Analog IC Technology
TM
EVALUATION BOARD
DESCRIPTION
FEATURES
The EV2101DQ-00A is the evaluation board for
the MP2101 step-down converter. It is designed
for high efficiency, step-down applications.
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•
•
The MP2101 is a 1.6MHz current mode
synchronous buck converter plus LDO, which
provides two regulated output rails. Both control
loops are internally compensated, and all power
devices are integrated. Channel 1 is a
synchronous buck providing up to 92% efficiency
and 800mA output current from a 2.5V to 6V
input voltage. Channel 2 is an LDO that can
supply up to 200mA of load current from either
the power input or the output of channel 1 to
minimize the overall power loss and output
noises.
The MP2101 is available in a space-saving
3mm x 3mm QFN10 package with an exposed
pad.
•
•
•
•
0.8A and 0.2A Outputs
2.5V to 6V Operating Input Range
Independently Adjustable Outputs from 0.6V
to VIN
Independently External Enable Control
PWROK Pin Monitors Output Regulation
±3% Output Voltage Reference Over
Temperature
Small Solution Size
APPLICATIONS
•
•
•
•
•
DVD+/-RW drive
Smart phones
PDAs
Digital Cameras
Portable Instruments
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage Range
Output Voltage
Load Max
Symbol
Value
Units
VIN
VOUT1
VOUT2
IOUT1
IOUT2
2.5 – 6.0
1.8
1.2
800
200
V
V
V
mA
mA
EV2101DQ-00A EVALUATION BOARD
EFFICIENCY (%)
Efficiency vs
Load Current
(L x W x H) 2.3” x 2.0” x 0.4”
(5.8cm x 5.1cm x 1.0cm)
Board Number
MPS IC Number
EV2101DQ-00A
MP2101DQ
EV2101DQ-00A Rev. 1.1
8/18/2006
100
95
90 VIN=3.3V
85
80
VIN=4.2V
75
70
65
VIN=5.0V
60
55
50
45
40
35
10
100
LOAD CURRENT (mA)
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1000
1
EV2101DQ-00A – 1.6MHz, 800mA SYNCHRONOUS STEP-DOWN PLUS 200mA LDO
EVALUATION BOARD
EVALUATION BOARD SCHEMATIC
VIN
VIN
U1
JP2
2
EN1
VIN1
2.5V - 6V
3
EN1
IN1
VIN2
GND
JP1
VOUT1
1.8V/800mA
EN2
PWROK
9
EN2
8
PWROK
MP2101
6
4
IN2
SW
OUT2
FB1
FB2
1
GND
JP3
VOUT2
1.2V/200mA
7
10
GND
GND
5
EV2101DQ-00A BILL OF MATERIALS
Qty
1
1
1
1
1
Ref
C1
C2
C3
C4
JP1
1
L1
2
1
2
2
1
R1, R7
R2
R3, R4
R5, R6
U1
Value
4.7µF
10µF
1µF
2.2µF
Description
Ceramic Cap., 16V, X7R
Ceramic Cap., 10V, X5R
Ceramic Cap., 16V, X7R
Ceramic Cap., 16V, X7R
3-Pin Header, 0.1"
D52LC Inductor, 1.63A
2.2µH
CR32 Inductor, 1.28A
300kΩ Film Res., 1%
150kΩ Film Res., 1%
60.4kΩ Film Res., 1%
100kΩ Film Res., 5%
DC-DC Converter
EV2101DQ-00A Rev. 1.1
8/18/2006
Package
1206
1210
1206
1206
SMD
SMD
603
603
603
603
QFN10
Manufacturer
TDK
TDK
TDK
TDK
Sullins
TOKO
Sumida
Yageo
Panasonic
Panasonic
Panasonic
MPS
Manufacturer P/N
C3216X7R1C475K
C3225X5R1A106M
C3216X7R1C105K
C3216X7R1C225K
PTC03SAAN
A914BYW-2R2M
CR32-2R2MC
9C06031A3003FKHFT
ERJ-3EKF1503V
ERJ-3EKF6042V
ERJ-3GEYJ104V
MP2101DQ
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MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
2
EV2101DQ-00A – 1.6MHz, 800mA SYNCHRONOUS STEP-DOWN PLUS 200mA LDO
EVALUATION BOARD
TYPICAL PERFORMANCE CHARACTERISTICS
Enable Turn Off
Enable Turn On
VIN1 = VIN2 = 3.6V, VOUT1 = 1.8V,
VOUT2 = 1.2V, EN1 = EN2 = 3.6V
ILOAD1 = 0.3A, ILOAD2 = 0.1A
with Resistive Load
VIN1 = VIN2 = 3.6V, VOUT1 = 1.8V,
VOUT2 = 1.2V, EN1 = EN2 = 3.6V
ILOAD1 = 0.3A, ILOAD2 = 0.1A
with Resistive Load
VEN
5V/div.
VEN
2V/div.
PWROK
2V/div.
PWROK
5V/div.
VOUT1
1V/div.
VOUT1
1V/div.
VOUT2
1V/div.
VOUT2
1V/div.
Input Ramp Down
Input Ramp Up
VIN1 = VIN2 = 3.6V, VOUT1 = 1.8V,
VOUT2 = 1.2V, EN1 = EN2 = 3.6V
ILOAD1 =0.3A, ILOAD2 = 0.1A
with Resistive Load
VIN1 = VIN2 = 3.6V, VOUT1 = 1.8V,
VOUT2 = 1.2V, EN1 = EN2 = 3.6V
ILOAD1 = 0.3A, ILOAD2 = 0.1A
with Resistive Load
VIN
2V/div.
VIN
2V/div.
VOUT1
2V/div.
VOUT1
2V/div.
VOUT2
1V/div.
VOUT2
1V/div.
1ms/div.
1ms/div.
Load Transient of
Synchronous Buck
LDO Load Transient
VIN = VIN2 = 3.6V, VOUT2 = 1.2V
ILOAD2 = 0.02A to 0.15A
with Resistive Load
VIN = 3.6V, VOUT1 = 1.8V
ILOAD1 = 0.8A with Resistive Load
VOUT1
0.1V/div.
IL1
0.5A/div.
EV2101DQ-00A Rev. 1.1
8/18/2006
VOUT2
50mV/div.
IL2
0.1A/div.
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© 2006 MPS. All Rights Reserved.
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EV2101DQ-00A – 1.6MHz, 800mA SYNCHRONOUS STEP-DOWN PLUS 200mA LDO
EVALUATION BOARD
PRINTED CIRCUIT BOARD LAYOUT
Figure 1—Top Silk Layer
Figure 2—Top Layer
Figure 3—Bottom Layer
EV2101DQ-00A Rev. 1.1
8/18/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
4
EV2101DQ-00A – 1.6MHz, 800mA SYNCHRONOUS STEP-DOWN PLUS 200mA LDO
EVALUATION BOARD
QUICK START GUIDE
The output voltages on this board are set to 1.8V and 1.2V. The board layout accommodates most
commonly used inductors and output capacitors.
1. Attach the positive and negative ends of the load to the VOUT1/VOUT2 and GND pins,
respectively.
2. With the input supply off, attach the input voltage, 2.5V ≤ VIN ≤ 6V, and the input ground to the
VIN and GND pins, respectively. Then turn on the power supply.
3. To enable the MP2101, apply a voltage, 1.5V ≤ VEN ≤ 6V, to the EN1/EN2 pin. To disable the
MP2101, apply a voltage, VEN < 0.3V, to the EN1/EN2 pin. The default setting for the jumper on
the board connects VIN to the EN1/EN2 pin. In this configuration, the part will operate without
applying any external voltage to the EN1/EN2 pin.
4. The output voltages VOUT1 and VOUT2 can be changed by varying R2 and R4, respectively.
Calculate the new value by the formula:
R2 =
R4 =
R1
⎛ VOUT1 ⎞
⎜⎜
⎟⎟ − 1
⎝ VFB1 ⎠
R3
⎛ VOUT 2
⎜⎜
⎝ VFB2
⎞
⎟⎟ − 1
⎠
Where VFB1 = VFB2 = 0.6V, R1 = 300kΩ, and R4 = 60.4kΩ
Example:
For VOUT1 = 2.5V:
R2 =
300kΩ
= 94.7kΩ
⎛ 2. 5 V ⎞
⎜
⎟ −1
⎝ 0 .6 V ⎠
Therefore, use a 95.3kΩ standard 1% value.
5. The JP1 Setting:
The JP1 can set the LDO input voltage from VIN1 or VOUT1.
6. EN1/EN2 Setting: JP2 and JP3
The EN1/EN2 signals can be turned on by connecting to the input voltage VIN1 or an external
signal.
NOTICE: The information in this document is subject to change without notice. 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.
EV2101DQ-00A Rev. 1.1
8/18/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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