EV9442-J-00A

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High Efficiency 2A, 36V, 600kHz Sync. Step-Down Switch Evaluation Board With Power Good EV9442-J-00A Rev. 1.0 www.MonolithicPower.com 1 12/3/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. The Future of Analog IC Technology

DESCRIPTION

The MP9442 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with built-in power MOSFETs. It offers a very compact solution to achieve a 2A continuous output current with excellent load and line regulation over a wide input supply range. The MP9442 has synchronous mode operation for higher efficiency over the output current load range. Current-mode operation provides fast transient response and eases loop stabilization. Full protection features include over-current protection and thermal shut down. The MP9442 requires a minimal number of readily-available standard external components, and is available in a space-saving 8-pin TSOT23 package. ELECTRICAL SPECIFICATIONS (1) Parameter Symbol Value Units Input Voltage V IN 12 V Output Voltage V OUT 3.3 V Output Current I OUT 0-2 A Notes: 1) For different Input/output voltage specs and different output capacitor/inductor may need cha nge the application circuit parameters.

FEATURES

 Wide 4V to 36V Continuous Operating Input Range  90m Ω/55mΩ Low RDS(ON) Internal Power MOSFETs  High-Efficiency Synchronous Mode Operation  600kHz Switching Frequency  Synchronizes from 200kHz to 2.2MHz External Clock  High Duty Cycle for Automotive Cold-crank  Internal Power-Save Mode  Internal Soft-Start  Power Good Indicator  Over-Current Protection with Hiccup  Thermal Shutdown  Output Adjustable from 0.8V  Available in an 8-Pin TSOT23 Package PACKAGEAPPLICATIONS  Automotive  Industrial Control System  Distributed Power Systems All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Qualit y Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION (L x W x H) 6.3cm x 4.9cm x 1.3cm Board Number MPS IC Number EV9442-J-00A MP9442GJ 0 100 LOAD CURRENT(mA) Efficiency vs. Load Current VOUT=3.3V 1 10 100 1000 10000 VIN=12V VIN=24V VIN=30V

EV9442-J-00A –2A, 36V HIGH EFFICIENCY SYNCHRONOUS STEP DOWN CONVERTER EV9442-J-00A Rev. 1.0 www.MonolithicPower.com 2 12/3/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC 10uF C1A 50V 0.1uF 50V NS 0.1uF 10uH 22uF C2A 41.2K 3.3V/2A NS 13k R10 51KR9 NS 16V VIN EN VOUT GND 10uF C1B 50V 0.1uF 100K PG 22uF 16V GND SW6 EN/SYNC 3 IN FB1 VCC

2 BST

4 GND

EV9442-J-00A –2A, 36V HIGH EFFICIENCY SYNCHRONOUS STEP DOWN CONVERTER EV9442-J-00A Rev. 1.0 www.MonolithicPower.com 3 12/3/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. EV9442 BILL OF MATERIALS Qty Ref Value Description Package Manufacturer Manufacturer P/N

2 C1A,

C1B 10μF Ceramic Cap., 50V, X5R 1210 muRata GRM32ER61H106KA12L 1 C8 0.1 μF Ceramic Cap., 50V, X7R 0603 muRata GRM188R71H104KA93D 2 C2,C2A 22 μF Ceramic Cap., 16V, X5R 1206 muRata GRM31CR61C226ME15L

1 C3 NS

2 C4,C6 0.1 μF Ceramic Cap., 25V, X7R 0603 muRata GRM188R71E104KA01D 1 R1 41.2k Thick Film Res., 1% 0603 Yageo RC0603FR-0741K2L 1 R2 13k Thick Film Res., 1% 0603 Yageo RC0603FR-0713KL

1 R3 NS

1 R4 20 Ω Thick Film Res., 1% 0603 Yageo RC0603FR-0720RL 1 R5 1M Thick Film Res., 1% 0603 Yageo RC0603FR-071ML

0 R6 NS

1 R7 100k Thick Film Res., 1% 0603 Yageo RC0603FR-07100KL 1 R9 51k Thick Film Res., 1% 0603 Yageo RC0603FR-0751KL 1 R10 10 Ω Thick Film Res., 1% 0603 Yageo RC0603FR-0710RL

1 L1 10 μH Inductor, DCR=33mΩ,

Is=4A SMD Wurth 744314101

1 U1 MP9442GJ Synchronous Step-

8 MPS MP9442GJ

EV9442-J-00A –2A, 36V HIGH EFFICIENCY SYNCHRONOUS STEP DOWN CONVERTER EV9442-J-00A Rev. 1.0 www.MonolithicPower.com 4 12/3/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. EVB TEST RESULTS Performance waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, L = 10µH, RBST=20Ω, TA = +25°C, unless otherwise noted. VOUT/AC 10mV/div. VSW 5V/div. IL 200mA/div. VOUT/AC 10mV/div. VSW 5V/div. IL 500mA/div. VOUT/AC 10mV/div. VSW 5V/div. IL 1A/div. VOUT 2V/div. VIN 5V/div. VSW 10V/div. IL 200mA/div. VOUT 2V/div. VIN 5V/div. VSW 10V/div. IL 200mA/div. VOUT 2V/div. VIN 5V/div. VSW 10V/div. IL 1A/div. VOUT 2V/div. VIN 5V/div. VSW 5V/div. IL 1A/div. VOUT 2V/div. VEN 2V/div. VSW 5V/div. IL 200mA/div. VOUT 2V/div. VEN 2V/div. VSW 10V/div. IL 1A/div. Steady State IOUT=0A Steady State IOUT = 0.1A Steady State IOUT=2A Startup through VIN IOUT=0A Startup through VIN IOUT=2A Shutdown through VIN IOUT=0A Shutdown through VIN IOUT=2A Startup Through EN IOUT=0A Startup Through EN IOUT=2A

EV9442-J-00A –2A, 36V HIGH EFFICIENCY SYNCHRONOUS STEP DOWN CONVERTER EV9442-J-00A Rev. 1.0 www.MonolithicPower.com 5 12/3/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. EVB TEST RESULTS (continued) Performance waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, L = 10µH, RBST=20Ω, TA = +25°C, unless otherwise noted.

EV9442-J-00A –2A, 36V HIGH EFFICIENCY SYNCHRONOUS STEP DOWN CONVERTER EV9442-J-00A Rev. 1.0 www.MonolithicPower.com 6 12/3/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. EVB TEST RESULTS (continued) Performance waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, L = 10µH, RBST=20Ω, TA = +25°C, unless otherwise noted.

EV9442-J-00A –2A, 36V HIGH EFFICIENCY SYNCHRONOUS STEP DOWN CONVERTER NOTICE: The information in this document is subject to change wi thout notice. Please contact M PS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights ar e not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV9442-J-00A Rev. 1.0 www.MonolithicPower.com 8 12/3/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 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 12V, 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 MP9442 will automatically startup. 5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.4V to turn on the regulator or less than 1.25V to turn it off. 6. To use the external synchronous function to adjust the switching frequency, apply an external clock signal to EN/SYNC pin.