ZSPM4121 Under-Voltage Load Switch for Smart Battery Management Brief Description Features The ZSPM4121 battery management load switch can be used to protect a battery from excessive discharge. It actively monitors the battery voltage and disconnects the battery from the load if the battery drops below a set voltage threshold. When the input battery voltage reaches 500mV above the set voltage threshold, the load switch turns on and connects the battery to the load. The 500mV hysteresis between the Off Mode and the On Mode prevents intermittent operation. The voltage threshold (VTHRESH) can be programmed at manufacturing to a customer-selected set point in the voltage range of 1.2V to 4.2V in 100mV increments to support a wide range of applications in consumer, medical, portable, and industrial applications. This device has ultra-low quiescent current, which makes it ideal for battery-powered applications. Typical quiescent current is 100pA in the Off Mode and 70nA in the On Mode. The ZSPM4121 includes a slew rate control P-channel load switch, over-current protection, and an open-drain power indicator pin (NPG). The slew-rate controlled turn-on characteristic prevents inrush current and voltage droop on the voltage. The overcurrent limit protects the device in case of an overload, short-circuit, or ground fault event. Threshold voltage options of 1.2V to 4.2V in 100mV steps (factory programmed) Wide input voltage range: 1.2V to 5.5V Supervisory over-current limit shutdown: (3A) Low drop-out disconnect from VCC to loads Controlled turn-on slew rate 500mV Off Mode to On Mode hysteresis Related ZMDI Smart Power Products ZSPM4141 Ultra-Low-Power Linear Regulator Available Support Evaluation Kit Support Documentation Physical Characteristics Package: 8-pin DFN (2mm x 2mm) ZSPM4121 Block Diagram ZSPM4121 Benefits Best-in-class ultra-low quiescent current in Off Mode: 100pA (typical) Ultra-low quiescent current in On Mode: 70nA (typical) Accurate on/off voltage threshold Low Rds(on): 175mΩ (typical) @ 5V VCC VOUT Regulated VTHRESH NPG GND For more information, contact ZMDI via [email protected] © 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.01 — February 7, 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. ZSPM4121 Under-Voltage Load Switch for Smart Battery Management Typical Application Circuit ZSPM4121 Load VOUT Charger VCC NPG Typical Applications Portable batteries Industrial Medical Smart cards RFID GND Ordering Information Ordering Code* Description Package ZSPM4121AI1W17 ZSPM4121 Under-Voltage Load Switch—VTHRESH factory set to 1.7V 8-pin DFN / 7” Reel (2500) ZSPM4121AI1W21 ZSPM4121 Under-Voltage Load Switch—VTHRESH factory set to 2.1V 8-pin DFN / 7” Reel (2500) ZSPM4121AI1W23 ZSPM4121 Under-Voltage Load Switch—VTHRESH factory set to 2.3V 8-pin DFN / 7” Reel (2500) ZSPM4121AI1W24 ZSPM4121 Under-Voltage Load Switch—VTHRESH factory set to 2.4V 8-pin DFN / 7” Reel (2500) ZSPM4121AI1W25 ZSPM4121 Under-Voltage Load Switch—VTHRESH factory set to 2.5V 8-pin DFN / 7” Reel (2500) ZSPM4121AI1W26 ZSPM4121 Under-Voltage Load Switch—VTHRESH factory set to 2.6V 8-pin DFN / 7” Reel (2500) ZSPM4121AI1W28 ZSPM4121 Under-Voltage Load Switch—VTHRESH factory set to 2.8V 8-pin DFN / 7” Reel (2500) ZSPM4121AI1W30 ZSPM4121 Under-Voltage Load Switch—VTHRESH factory set to 3.0V 8-pin DFN / 7” Reel (2500) ZSPM4121KIT ZSPM4121 Evaluation Kit * For a 13” reel (3300 parts), replace the W in the ordering code with an R. Custom VTHRESH values are also available: 1.2V to 4.2V (typical) in 100mV increments. Sales and Further Information www.zmdi.com [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. ZMD AG hereby expressly disclaims any liability of ZMD AG to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise. 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 © 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.01 — February 7, 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.