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. • • • 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) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 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 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 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. 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: 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. 5