Data Sheet Rev. 1.03 / September 2012 ZSPM4012 High Efficiency 2A Synchronous Buck Converter Power and Precision ZSPM4012 High Efficiency 2A Synchronous Buck Converter Brief Description Benefits The ZSPM4012 is a DC/DC synchronous switching Increased battery life regulator with fully integrated power switches, Minimal external component count internal compensation, and full fault protection. (3 capacitors, 1 inductor) The 1MHz switching frequency enables using Inherent fault protection and reporting small filter components, resulting in reduced board space and reduced bill-of-materials costs. Available Support The ZSPM4012 utilizes current mode feedback in Evaluation Kit normal regulation pulse-width modulation (PWM) Documentation mode. When the regulator is disabled (EN pin is low), the ZSPM4012 draws less than 10A quies- Physical Characteristics cent current. Junction operating temperature -40C to 125C The ZSPM4012 integrates a wide range of Packaged in a 16pin QFN (3x3mm) protection circuitry, including input supply under- voltage lockout, output voltage soft start, current limit, V over-voltage, and thermal shutdown. OUT Related ZMDI Products The ZSPM4012 includes supervisory reporting ZSPM4011/ZSPM4013: 1A/3A synchronous through the PG (Power Good) open drain output to buck converters, available with adjustable out- interface other components in the system. put from 0.9 to 5V or fixed output voltages at 1.5V, 1.8V, 2.5V, 3.3V, 5.0V (16-pin 3x3 QFN) ZSPM1000: >5A single-phase, single-rail, true Features digital PWM controller (24-pin 4x4mm QFN) Output voltage options depending on order code: ZSPM4012 Application Circuits Fixed output voltages: 1.5V, 1.8V, 2.5V, Adjustable Output 3.3V, or 5V with +/- 2% output tolerance BST C BST VCC VCC Adjustable output voltage range: 0.9V to 5V VSW VOUT with +/- 1.5% reference C BYPASS L OUT R TOP COUT Wide input voltage range: R BOT 6V to 24V FB VOUT 1MHz +/- 10% fixed switching frequency 10 k EN EN (optional) 2A continuous output current High efficiency up to 95% PG PG Current mode PWM control with pulse- frequency modulation (PFM) mode for Fixed Output improved light load efficiency BST VCC VCC Voltage supervisor for V reported at the PG CBST OUT pin CBYPASS VOUT VSW L OUT Input supply under voltage lockout C OUT Soft start for controlled startup with no FB VOUT overshoot 10k EN EN Full protection for over-current, over- (optional) temperature, and V over-voltage OUT PG PG Less than 10A in Disabled Mode Low external component count For more information, contact ZMDI via analog zmdi.com. 2012 Zentrum Mikroelektronik Dresden AG Rev.1.03 September 21, 2012. 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. GND GND ZSPM4012 ZSPM4012 PGND PGND