EV2174C-G-00A MPS | Alldatasheet
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4A, 5.5V, 1.1MHz Synchronous Step-Down Switcher Evaluation Board EV2174CGG-00A Rev.1.0 www.MonolithicPower.com 1 2/25/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved.
DESCRIPTION
The EV2174C-G-00A is used for demonstrating the performance of MPS’s MP2174C, a low voltage high switching frequency step-down switcher with built in power MOSFETs. MP2174C provides up to 4A highly efficient output with constant-on-time control for fast loop response.The output voltage can be regulated as low as 0.6V. High power efficiency over a wide load range is achieved by scaling down the switching frequency at light load to reduce the switching related loss by constant on time control. Short circuit and thermal shutdown provides reliable, fault-tolerant operation. MP2174C is available in QFN12 (2x2mm) package. ELECTRICAL SPECIFICATION Parameter Symbol Value Units Input Voltage V IN 2.7– 5.5 V Output Voltage V OUT 1.2 V Output Current I OUT 4 A
FEATURES
Forced PWM Mode Operation Wide 2.7V to 5.5V Operating Input Range Output Voltage as Low as 0.6V 4A Output Current 35m Ω and 18mΩ Internal Power MOSFET 1.1MHz Frequency 100% Duty cycle in Dropout 0.5ms Internal Soft-Start Time EN and Power Good for Power Sequencing Auto Discharge at Power-off Short Circuit Protection with Hiccup Mode Available in a QFN12 (2x2mm) Package
APPLICATIONS
Storage Drives Portable/Handheld Devices PDAs DVD Drives Wireless/Networking Cards Low Voltage I/O System Power All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV2174C-G-00A EVALUATION BOARD I Board Number MPS IC Number EV2174C-G-00A MP2174CGG Efficiency vs. Output Current VIN=5V, DCR=27mΩ 100 EFFICI ENC Y (%) OUTPUT CURRENT (A) Vout=1.2V Vout=1.8V Vout=2.5V Vout=3.3V
EV2174C-G-00A – 4A, 5.5V, 1.1MHZ, SYNC STEP-DOWN SWITCHER EV2174CGG-00A Rev.1.0 www.MonolithicPower.com 2 2/25/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC EV2174C-G-00A BILL OF MATERIALS Qty RefDes Value Description Package Manufacturer Manufacturer P/N C1A,C2A, C3,C4 NS 1 C1 22 μF Ceramic Cap., 10V, 20%, X5R 0805 Taiyo Yuden LMK212BJ226MG-T 1 C2 10 μF Ceramic Cap., 6.3V, 10%, X5R 0805 muRata GRM21BR70J106KE76L 1 L1 1.0 μH Inductor, I S= 9A, DCR=27mΩ SMD Wurth 74437324010 R1 NS 1 R2 100k Film Res., 5% 0603 Yageo RC0603JR-07100KL R3 NS 2 R4,R5 200k Film Res., 5% 0603 Yageo RC0603JR-07200KL
1 U1 MP2174C Synchronous Step-Down
EV2174C-G-00A – 4A, 5.5V, 1.1MHZ, SYNC STEP-DOWN SWITCHER EV2174CGG-00A Rev.1.0 www.MonolithicPower.com 3 2/25/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS VIN = 5V, VOUT = 1.2V, L =1µH, TA = +25ºC, unless otherwise noted. Output Ripple VIN=3.6V, VOUT=3.3V, IOUT=0A Output Ripple VIN=5V, VOUT=1.2V, IOUT=0A CH1: VOUT/AC 10mV/div. CH2: VIN 2V/div. CH3: VSW 2V/div. CH4: IL 500mA/div. CH1: VOUT/AC 10mV/div. CH2: VIN 5V/div. CH3: VSW 2V/div. CH4: IL 2A/div. 4μs/div. 1μs/div. Output Ripple VIN=5V, VOUT=1.2V, IOUT=4A Transient IOUT=2A to 4A, 2.5A/μs CH1: VOUT/AC 5mV/div. CH2: VIN 5V/div. CH3: VSW 2V/div. CH4: IL 2A/div. CH1: VOUT/AC 50mV/div. CH3: VSW 5V/div. CH4: IOUT 2A/div. 1μs/div. 100μs/div. VIN Start-Up IOUT=0A VIN Start-Up IOUT=4A CH1: VOUT 1V/div. CH2: VIN 5V/div. CH3: VSW 5V/div. CH4: IL 1A/div. CH1: VOUT 1V/div. CH2: VIN 5V/div. CH3: VSW 5V/div. CH4: IL 5A/div. 1ms/div. 1ms/div.
EV2174C-G-00A – 4A, 5.5V, 1.1MHZ, SYNC STEP-DOWN SWITCHER EV2174CGG-00A Rev.1.0 www.MonolithicPower.com 4 2/25/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L =1µH, TA = +25ºC, unless otherwise noted. VIN Shutdown IOUT=0A VIN Shutdown IOUT=4A CH1: VOUT 1V/div. CH2: VIN 5V/div. CH3: VSW 5V/div. CH4: IL 1A/div. CH1: VOUT 1V/div. CH2: VIN 5V/div. CH3: VSW 5V/div. CH4: IL 5A/div. 40ms/div. 20ms/div. EN Start-Up IOUT=0A EN Start-Up IOUT=4A CH1: VOUT 1V/div. CH2: VEN 5V/div. CH3: VSW 5V/div. CH4: IL 1A/div. CH1: VOUT 1V/div. CH2: VEN 5V/div. CH3: VSW 5V/div. CH4: IL 5A/div. 1ms/div. 1ms/div. EN Shutdown IOUT=0A EN Shutdown IOUT=4A CH1: VOUT 1V/div. CH2: VEN 5V/div. CH3: VSW 5V/div. CH4: IL 1A/div. CH1: VOUT 1V/div. CH2: VEN 5V/div. CH3: VSW 5V/div. CH4: IL 5A/div. 100μs/div. 100μs/div.
EV2174C-G-00A – 4A, 5.5V, 1.1MHZ, SYNC STEP-DOWN SWITCHER EV2174CGG-00A Rev.1.0 www.MonolithicPower.com 5 2/25/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L =1µH, TA = +25ºC, unless otherwise noted. SCP Entry IOUT=4A SCP Recovery IOUT=4A CH1: VOUT 1V/div. CH2: VIN 5V/div. CH3: VSW 5V/div. CH4: IL 5A/div. CH1: VOUT 1V/div. CH2: VIN 5V/div. CH3: VSW 5V/div. CH4: IL 5A/div. 400μs/div. 400μs/div. SCP State IOUT=4A SCP Entry IOUT=0A CH1: VOUT 1V/div. CH2: VIN 5V/div. CH3: VSW 5V/div. CH4: IL 5A/div. CH1: VOUT 1V/div. CH2: VIN 5V/div. CH3: VSW 5V/div. CH4: IL 5A/div. 400μs/div. 1ms/div. SCP Recovery IOUT=0A CH1: VOUT 1V/div. CH2: VIN 5V/div. CH3: VSW 5V/div. CH4: IL 5A/div. 1ms/div.
EV2174C-G-00A – 4A, 5.5V, 1.1MHZ, SYNC STEP-DOWN SWITCHER NOTICE: The information in this document is subject to change wi thout notice. Please contact MP S 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. EV2174CGG-00A Rev.1.0 www.MonolithicPower.com 7 2/25/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. QUICK START GUIDE 1. Connect the positive and negative terminals of the load to the VOUT and GND pins, respectively. 2. Preset the power supply output between 2.7V and 5.5V, and then turn off the power supply. 3. Connect the positive and negative terminals of the power supply output to the VIN and GND pins, respectively. 4. Turn the power supply on. The board will automatically start up. 5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.2V to turn on the regulator or less than 0.4V to turn it off. LAYOUT RECOMMENDATION OF MP2174C Proper layout of the switching power supplies is very important, and sometimes critical to make it work properly. Especially, for the high switching converter, if the layout is not carefully done, the regulator could show poor line or load regulation, stability issues. For MP2174C, the high speed step-down regulator, the input capacitor should be placed as close as possible to the IC pins. As shown in Figure 6, the 0805 size ceramic capacitor is used, please make sure the two ends of the ceramic capacitor be directly connected to PIN1 (the Power Input Pin) and PIN 3 (the Power GND Pin). Figure 6: Two ends of Input decoupling Capacitor close to Pin 1 and Pin 3