EV2101DQ-00A [MPS]
1.6MHz, 800mA Synchronous Step-Down Converter plus 200mA LDO; 为1.6MHz ， 800毫安同步降压型转换器加200毫安LDO
| 型号： | EV2101DQ-00A |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | 1.6MHz, 800mA Synchronous Step-Down Converter plus 200mA LDO |
| 文件： | 总5页 (文件大小：222K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TM
EV2101DQ-00A
1.6MHz, 800mA Synchronous
Step-Down Converter plus 200mA LDO
TM
The Future of Analog IC Technology
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.
•
•
•
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
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.
•
•
•
•
Small Solution Size
APPLICATIONS
•
•
•
•
•
DVD+/-RW drive
Smart phones
PDAs
Digital Cameras
Portable Instruments
The MP2101 is available in a space-saving
3mm x 3mm QFN10 package with an exposed
pad.
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
ELECTRICAL SPECIFICATIONS
Parameter
Symbol
Value
2.5 – 6.0
1.8
Units
Input Voltage Range
VIN
V
VOUT1
VOUT2
IOUT1
V
Output Voltage
Load Max
1.2
V
800
mA
mA
IOUT2
200
EV2101DQ-00A EVALUATION BOARD
Efficiency vs
Load Current
100
95
V
=3.3V
IN
90
85
80
75
70
65
60
55
50
45
40
35
V
=4.2V
IN
V
=5.0V
IN
(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
10
100
1000
LOAD CURRENT (mA)
EV2101DQ-00A
MP2101DQ
EV2101DQ-00A Rev. 1.1
8/18/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
1
EV2101DQ-00A – 1.6MHz, 800mA SYNCHRONOUS STEP-DOWN PLUS 200mA LDO
EVALUATION BOARD
EVALUATION BOARD SCHEMATIC
VIN
JP3
VIN
U1
JP2
2
3
9
8
EN1
IN1
EN2
EN1
EN2
VIN1
2.5V - 6V
PWROK
PWROK
VIN2
GND
MP2101
6
JP1
IN2
VOUT1
VOUT2
1.8V/800mA
1.2V/200mA
4
1
7
SW
OUT2
FB2
10
GND
GND
FB1
GND
5
EV2101DQ-00A BILL OF MATERIALS
Qty
1
Ref
C1
Value Description
Package Manufacturer Manufacturer P/N
4.7µF Ceramic Cap., 16V, X7R
10µF Ceramic Cap., 10V, X5R
1206
1210
1206
1206
TDK
C3216X7R1C475K
C3225X5R1A106M
C3216X7R1C105K
C3216X7R1C225K
PTC03SAAN
1
C2
TDK
1
C3
1µF
Ceramic Cap., 16V, X7R
TDK
1
C4
2.2µF Ceramic Cap., 16V, X7R
3-Pin Header, 0.1"
TDK
1
JP1
Sullins
TOKO
Sumida
Yageo
Panasonic
Panasonic
Panasonic
D52LC Inductor, 1.63A
2.2µH
SMD
SMD
603
A914BYW-2R2M
CR32-2R2MC
1
L1
CR32 Inductor, 1.28A
2
1
2
2
1
R1, R7 300kΩ Film Res., 1%
R2 150kΩ Film Res., 1%
9C06031A3003FKHFT
ERJ-3EKF1503V
ERJ-3EKF6042V
ERJ-3GEYJ104V
MP2101DQ
603
R3, R4 60.4kΩ Film Res., 1%
R5, R6 100kΩ Film Res., 5%
603
603
U1
DC-DC Converter
QFN10 MPS
EV2101DQ-00A Rev. 1.1
8/18/2006
www.MonolithicPower.com
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
V
V
I
= V
= 3.6V, V
= 1.8V,
= 1.2V, EN1 = EN2 = 3.6V
V
V
I
= V
= 3.6V, V
= 1.8V,
= 1.2V, EN1 = EN2 = 3.6V
IN1
IN2
OUT1
IN1
IN2
OUT1
OUT2
OUT2
= 0.3A, I
= 0.1A
= 0.3A, I
= 0.1A
LOAD1
LOAD2
LOAD1
LOAD2
with Resistive Load
with Resistive Load
V
EN
5V/div.
V
EN
2V/div.
PWROK
2V/div.
PWROK
5V/div.
V
OUT1
1V/div.
V
OUT1
V
OUT2
1V/div.
1V/div.
V
OUT2
1V/div.
Input Ramp Down
Input Ramp Up
V
V
I
= V
= 3.6V, V
= 1.8V,
= 1.2V, EN1 = EN2 = 3.6V
V
V
I
= V
= 3.6V, V
= 1.8V,
IN1
IN2
OUT1
IN1
IN2
= 1.2V, EN1 = EN2 = 3.6V
OUT1
OUT2
OUT2
=0.3A, I
= 0.1A
= 0.3A, I
= 0.1A
LOAD1
LOAD2
LOAD1
LOAD2
with Resistive Load
with Resistive Load
V
IN
2V/div.
V
IN
2V/div.
V
OUT1
2V/div.
V
OUT1
2V/div.
V
OUT2
1V/div.
V
OUT2
1V/div.
1ms/div.
1ms/div.
Load Transient of
Synchronous Buck
LDO Load Transient
V
I
= V
IN2
= 3.6V, V = 1.2V
OUT2
IN
V
I
= 3.6V, V
= 1.8V
= 0.02A to 0.15A
IN
OUT1
= 0.8A with Resistive Load
LOAD2
with Resistive Load
LOAD1
V
OUT1
V
OUT2
0.1V/div.
50mV/div.
I
I
L2
L1
0.1A/div.
0.5A/div.
EV2101DQ-00A Rev. 1.1
8/18/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
3
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:
R1
R2 =
⎛
⎞
VOUT1
VFB1
⎜
⎜
⎟
⎟
− 1
⎝
⎠
R3
VOUT2
VFB2
R4 =
⎛
⎞
⎜
⎜
⎟
⎟
− 1
⎝
⎠
Where VFB1 = VFB2 = 0.6V, R1 = 300kΩ, and R4 = 60.4kΩ
Example:
For VOUT1 = 2.5V:
300kΩ
R2 =
= 94.7kΩ
2.5V
0.6V
⎛
⎞
− 1
⎜
⎟
⎝
⎠
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.
5
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