Data Sheet Rev. 1.00 / September 2013 ZSPM4022-12 12V/12A Synchronous DC/DC Buck Regulator Analog ICs Powerful and Determined ZSPM4022-12 12V/12A Synchronous DC/DC Buck Regulator Brief Description Benefits The ZSPM4022-12 is a constant-frequency, syn- Ultra-light load efficiency up to 80% at 10mA chronous DC/DC buck regulator featuring adaptive Up to 95% efficiency on-time control architecture. The ZSPM4022-12 Feedback reference accuracy as high as 1% operates over a 4.5V to 19V supply range (12V typi- cal). It has an internal linear regulator that provides a regulated 5V to power the internal control circuitry. Features The ZSPM4022-12 operates at a constant 600kHz Rapid-control architecture enables operation with (typical) switching frequency in continuous- a high input/output voltage ratio (e.g., V = 19V IN conduction mode and can be used to provide up to and V = 0.8V) and small output capacitance OUT 12A of output current. The output voltage is adjust- Adjustable output voltage from 0.8V to 5.5V able from 5.5V down to 0.8V. Universally compatible with most output Under medium to heavy loads, the ZSPM4022-12 capacitorsstable with zero to high ESR provides high efficiency and ultra-fast transient res- Power good (PG) output ponse via its rapid-control architecture. Under light Foldback current limiting and hiccup mode load conditions, it maintains high efficiency and a short-circuit protection superior transient response by transitioning to Safe start-up into pre-biased loads variable-frequency, discontinuous mode operation with its ultra-light-load architecture. The ZSPM4022-12 offers a full suite of protection Available Support features to ensure protection of the IC during fault Evaluation Kit conditions. These include under-voltage lockout to Support documentation ensure proper operation under power-sag con- ditions thermal shutdown internal soft-start to reduce inrush current foldback current limiting and Physical Characteristics hiccup mode short-circuit protection. The Input voltage range: 4.5V to 19V ZSPM4022-12 includes a power good (PG) output to Output current: up to 12A allow simple sequencing. Switching frequency: 600kHz Junction temperature: 40 C to +125 C 28-pin 5mm 6mm QFN package ZSPM4022-12 Typical Application Efficiency (VIN = 12V) vs. Output Current 100 95 5.0V 90 3.3V 2.5V 85 1.8V 1.5V 80 1.2V 1.0V 75 0.9V 0.8V 70 65 60 55 VIN = 12V 50 0 3 6 9 12 15 OUTPUT CURRENT (A) For more information, contact ZMDI via Analog zmdi.com. 2013 Zentrum Mikroelektronik Dresden AG Rev. 1.00 September 17, 2013. 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. EFFICIENCY (%)