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TM
EV2101DQ-00A
1.6MHz, 800mA Synchronous Step-Down Converter plus 200mA LDO
EVALUATION BOARD
The Future of Analog IC Technology
TM
DESCRIPTION
The EV2101DQ-00A is the evaluation board for the MP2101 step-down converter. It is designed for high efficiency, step-down applications. 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.
FEATURES
* * * * * * * * * * * * 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 DVD+/-RW drive Smart phones PDAs Digital Cameras Portable Instruments
APPLICATIONS
"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 VIN VOUT1 VOUT2 IOUT1 IOUT2 Value 2.5 - 6.0 1.8 1.2 800 200 Units V V V mA mA
EV2101DQ-00A EVALUATION BOARD
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)
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 EV2101DQ-00A
EV2101DQ-00A Rev. 1.1 8/18/2006
MPS IC Number MP2101DQ
EFFICIENCY (%)
1000
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EV2101DQ-00A - 1.6MHz, 800mA SYNCHRONOUS STEP-DOWN PLUS 200mA LDO EVALUATION BOARD
EVALUATION BOARD SCHEMATIC
VIN JP2 EN1 VIN1 2.5V - 6V GND JP1 VOUT1 1.8V/800mA VIN2
6 IN2 U1 2 EN1 EN2 9
VIN JP3 EN2
3
IN1
PWROK
8
PWROK
MP2101
4
SW
OUT2
7
VOUT2 1.2V/200mA
GND
1 FB1 GND 5 FB2
10
GND
EV2101DQ-00A BILL OF MATERIALS
Qty 1 1 1 1 1 1 2 1 2 2 1 Ref C1 C2 C3 C4 JP1 L1 R1, R7 R2 R3, R4 R5, R6 U1 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 2.2H CR32 Inductor, 1.28A 300k Film Res., 1% 150k Film Res., 1% 60.4k Film Res., 1% 100k Film Res., 5% DC-DC Converter Value 4.7F 10F 1F 2.2F 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
EV2101DQ-00A Rev. 1.1 8/18/2006
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EV2101DQ-00A - 1.6MHz, 800mA SYNCHRONOUS STEP-DOWN PLUS 200mA LDO EVALUATION BOARD
TYPICAL PERFORMANCE CHARACTERISTICS
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
VEN 5V/div. PWROK 5V/div. VOUT1 1V/div. VOUT1 1V/div. VOUT2 1V/div. VOUT2 1V/div.
Enable Turn Off
VIN1 = VIN2 = 3.6V, VOUT1 = 1.8V, VOUT2 = 1.2V, EN1 = EN2 = 3.6V ILOAD1 = 0.3A, ILOAD2 = 0.1A with Resistive Load
VEN 2V/div. PWROK 2V/div.
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
VIN 2V/div. VIN 2V/div. VOUT1 2V/div. VOUT2 1V/div.
Input Ramp Down
VIN1 = VIN2 = 3.6V, VOUT1 = 1.8V, VOUT2 = 1.2V, EN1 = EN2 = 3.6V ILOAD1 =0.3A, ILOAD2 = 0.1A with Resistive Load
VOUT1 2V/div. VOUT2 1V/div.
1ms/div.
1ms/div.
Load Transient of Synchronous Buck
VIN = 3.6V, VOUT1 = 1.8V ILOAD1 = 0.8A with Resistive Load
LDO Load Transient
VIN = VIN2 = 3.6V, VOUT2 = 1.2V ILOAD2 = 0.02A to 0.15A with Resistive Load
VOUT1 0.1V/div.
VOUT2 50mV/div.
IL1 0.5A/div.
IL2 0.1A/div.
EV2101DQ-00A Rev. 1.1 8/18/2006
www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 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. (c) 2006 MPS. All Rights Reserved.
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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 = R1 VOUT1 -1 V FB1 R3 VOUT 2 V FB2 -1
R4 =
Where VFB1 = VFB2 = 0.6V, R1 = 300k, and R4 = 60.4k Example: For VOUT1 = 2.5V:
R2 = 300k = 94.7k 2. 5 V -1 0 .6 V
Therefore, use a 95.3k 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. (c) 2006 MPS. All Rights Reserved.
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