Data Sheet

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.