ZSPM4012B High Efficiency 2A Synchronous Buck Converter Brief Description Benefits The ZSPM4012B is a DC/DC synchronous switching regulator with fully integrated power switches, internal compensation, and full fault protection. The 1MHz switching frequency enables using small filter components, resulting in reduced board space and reduced bill-of-materials costs. The ZSPM4012B utilizes current mode feedback in normal regulation pulse-width modulation (PWM) mode. When the regulator is disabled (EN pin is low), the ZSPM4012B draws less than 10µA quiescent current. Junction operating temperature -40°C to 125°C Packaged in a 16pin QFN (3x3mm) Related ZMDI Products ZSPM4011B/ZSPM4013B: 1A/3A synchronous buck converters, available with adjustable output from 0.9 to 5.5V or fixed output voltages at 1.5V, 1.8V, 2.5V, 3.3V, 5.0V (16-lead 3x3mm QFN) ZSPM1000: >5A single-phase, single-rail, true digital PWM controller (24-pin 4x4mm QFN) ZSPM4012B Application Circuits Adjustable Output BST VCC VCC CBYPASS EN CBST VSW EN VOUT LOUT RTOP COUT RBOT FB VOUT 10 kΩ (optional) PG PG Fixed Output VCC BST VCC CBYPASS EN EN GND Physical Characteristics ZSPM4012B Evaluation Kit Documentation PGND Output voltage options (depends on order code): Fixed output voltages: 1.5V, 1.8V, 2.5V, 3.3V, or 5V with +/- 2% output tolerance Adjustable output voltage range: 0.9V to 5.5V with +/- 1.5% reference Wide input voltage range: 4.5V to 24V 1MHz +/- 10% fixed switching frequency 2A continuous output current High efficiency – up to 95% Current mode PWM control with pulsefrequency modulation (PFM) mode for improved light load efficiency Voltage supervisor for VOUT reported at the PG pin Input supply under voltage lockout Soft start for controlled startup with no overshoot Full protection for over-current, overtemperature, and VOUT over-voltage Less than 10µA in Disabled Mode Low external component count Available Support GND ZSPM4012B Features PGND The ZSPM4012B integrates a wide range of protection circuitry, including input supply undervoltage lockout, output voltage soft start, current limit, VOUT over-voltage, and thermal shutdown. The ZSPM4012B includes supervisory reporting through the PG (Power Good) open drain output to interface other components in the system. Increased battery life Minimal external component count (3 capacitors, 1 inductor) Inherent fault protection and reporting VSW CBST VOUT LOUT COUT FB VOUT 10kΩ (optional) PG PG For more information, contact ZMDI via [email protected] © 2014 Zentrum Mikroelektronik Dresden AG — Rev.1.20 — February 18, 2014. All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. ZSPM4012B High Efficiency 2A Synchronous Buck Converter ZSPM4012B Block Diagram PG EN VCC 4.2V VCC VCC MONITOR & CONTROL Oscillator Typical Applications Wireless access points, cable modems Set-top boxes DVD, LCD, LED supplies Portable products, including GPS, smart phones, tablet PCs Printers VCC Over-Voltage Protection FB Bootstrap Voltage Thermal Protection Ramp Generator Vref & Soft Start Under-Voltage Protection BST Over Current Protection VCC Gate Drive Gate Drive Control Comparator Gate Drive Error Amp Compensation Network VSW High-Side Switch Vref PGND Low-Side Switch FB PFM Mode Comparator GND Ordering Information Ordering Code Description ZSPM4012BA1W00 ZSPM4012BA1W15 ZSPM4012BA1W18 ZSPM4012BA1W25 ZSPM4012BA1W33 ZSPM4012BA1W50 ZSPM4012BKIT 2A Synchronous Buck Converter: adjustable output, 0.9V to 5.5V, 16-pin 3x3mm QFN 2A Synchronous Buck Converter: fixed output, 1.5V,16-pin 3x3mm QFN 2A Synchronous Buck Converter: fixed output, 1.8V,16-pin 3x3mm QFN 2A Synchronous Buck Converter: fixed output, 2.5V,16-pin 3x3mm QFN 2A Synchronous Buck Converter: fixed output, 3.3V,16-pin 3x3mm QFN 2A Synchronous Buck Converter: fixed output, 5.0V,16-pin 3x3mm QFN ZSPM4012B Evaluation Kit for 2A Synchronous Buck Converter Sales and Further Information Package www.zmdi.com 7” reel with 1000 ICs 7” reel with 1000 ICs 7” reel with 1000 ICs 7” reel with 1000 ICs 7” reel with 1000 ICs 7” reel with 1000 ICs Kit [email protected] Zentrum Mikroelektronik Dresden AG Global Headquarters Grenzstrasse 28 01109 Dresden, Germany ZMD America, Inc. 1525 McCarthy Blvd., #212 Milpitas, CA 95035-7453 USA Central Office: Phone +49.351.8822.306 Fax +49.351.8822.337 USA Phone 1.855.275.9634 Phone +1.408.883.6310 Fax +1.408.883.6358 European Technical Support Phone +49.351.8822.7.772 Fax +49.351.8822.87.772 DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. 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European Sales (Stuttgart) Phone +49.711.674517.55 Fax +49.711.674517.87955 Zentrum Mikroelektronik Dresden AG, Japan Office 2nd Floor, Shinbashi Tokyu Bldg. 4-21-3, Shinbashi, Minato-ku Tokyo, 105-0004 Japan ZMD FAR EAST, Ltd. 3F, No. 51, Sec. 2, Keelung Road 11052 Taipei Taiwan Phone +81.3.6895.7410 Fax +81.3.6895.7301 Phone +886.2.2377.8189 Fax +886.2.2377.8199 Zentrum Mikroelektronik Dresden AG, Korea Office U-space 1 Building 11th Floor, Unit JA-1102 670 Sampyeong-dong Bundang-gu, Seongnam-si Gyeonggi-do, 463-400 Korea Phone +82.31.950.7679 Fax +82.504.841.3026 © 2014 Zentrum Mikroelektronik Dresden AG — Rev.1.20 — February 18, 2014 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.