Under-Voltage Load Switch for
Smart Battery Management
ZSPM4121
Datasheet
Brief Description
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 (V
THRESH
) can be programmed
at manufacturing to a customer-selected set point in
the voltage range of 1.2V to 4.2V in 100mV incre-
ments to support a wide range of applications in con-
sumer, 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-chan-
nel 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 over-
current limit protects the device in case of an
overload, short-circuit, or ground fault event.
Features
•
•
•
•
•
•
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 IDT 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
•
•
•
•
VCC
VOUT
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
Regulated
V
THRESH
NPG
GND
© 2016 Integrated Device Technology, Inc.
1
January 29, 2016
Under-Voltage Load Switch for
Smart Battery Management
ZSPM4121
Datasheet
Typical Application Circuit
ZSPM4121
Charger
Typical Applications
•
•
•
•
•
VOUT
VCC
NPG
GND
Load
Portable batteries
Industrial
Medical
Smart cards
RFID
Ordering Information
Ordering Code*
ZSPM4121AI1W17
ZSPM4121AI1W21
ZSPM4121AI1W23
ZSPM4121AI1W24
ZSPM4121AI1W25
ZSPM4121AI1W26
ZSPM4121AI1W28
ZSPM4121AI1W30
ZSPM4121KIT
Description
ZSPM4121 Under-Voltage Load Switch—V
THRESH
factory set to 1.7V
ZSPM4121 Under-Voltage Load Switch—V
THRESH
factory set to 2.1V
ZSPM4121 Under-Voltage Load Switch—V
THRESH
factory set to 2.3V
ZSPM4121 Under-Voltage Load Switch—V
THRESH
factory set to 2.4V
ZSPM4121 Under-Voltage Load Switch—V
THRESH
factory set to 2.5V
ZSPM4121 Under-Voltage Load Switch—V
THRESH
factory set to 2.6V
ZSPM4121 Under-Voltage Load Switch—V
THRESH
factory set to 2.8V
ZSPM4121 Under-Voltage Load Switch—V
THRESH
factory set to 3.0V
ZSPM4121 Evaluation Kit
Package
8-pin DFN / 7” Reel (2500)
8-pin DFN / 7” Reel (2500)
8-pin DFN / 7” Reel (2500)
8-pin DFN / 7” Reel (2500)
8-pin DFN / 7” Reel (2500)
8-pin DFN / 7” Reel (2500)
8-pin DFN / 7” Reel (2500)
8-pin DFN / 7” Reel (2500)
* For a 13” reel (3300 parts), replace the W in the ordering code with an R. Custom V
THRESH
values are also available: 1.2V to 4.2V (typical) in 100mV increments.
Corporate Headquarters
6024 Silver Creek Valley Road
San Jose, CA 95138
www.IDT.com
Sales
1-800-345-7015 or 408-284-8200
Fax: 408-284-2775
www.IDT.com/go/sales
Tech Support
www.IDT.com/go/support
DISCLAIMER Integrated Device Technology, Inc. (IDT) reserves the right to modify the products and/or specifications described herein at any time, without notice, at IDT's sole discretion. Performance
specifications and operating parameters of the described products are determined in an independent state and are not guaranteed to perform the same way when installed in customer products. The
information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of IDT's products for any particular purpose, an
implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property
rights of IDT or any third parties.
IDT's products are not intended for use in applications involving extreme environmental conditions or in life support systems or similar devices where the failure or malfunction of an IDT product can be
reasonably expected to significantly affect the health or safety of users. Anyone using an IDT product in such a manner does so at their own risk, absent an express, written agreement by IDT.
Integrated Device Technology, IDT and the IDT logo are trademarks or registered trademarks of IDT and its subsidiaries in the United States and other countries. Other trademarks used herein are the
property of IDT or their respective third party owners. For datasheet type definitions and a glossary of common terms, visit
www.idt.com/go/glossary.
All contents of this document are copyright of Integrated
Device Technology, Inc. All rights reserved.
© 2016 Integrated Device Technology, Inc.
2
January 29, 2016
ZSPM4121 Datasheet
Contents
ZSPM4121 Characteristics.................................................................................................................................. 5
1.1. Absolute Maximum Ratings .......................................................................................................................... 5
1.2. Thermal Characteristics ................................................................................................................................ 5
1.3. Recommended Operating Conditions .......................................................................................................... 5
1.4. Electrical Characteristics .............................................................................................................................. 6
2 Typical Performance Characteristics .................................................................................................................. 7
3 Description of Circuit ........................................................................................................................................... 8
4 Application Circuit ................................................................................................................................................ 9
4.1. Typical Application Circuit ............................................................................................................................ 9
5 Pin Configuration and Package ......................................................................................................................... 10
5.1. Package Dimensions and Marking Diagram .............................................................................................. 10
5.2. Pin Description for 8-Pin DFN (2x2 mm) .................................................................................................... 11
6 Layout and Soldering Requirements ................................................................................................................. 12
6.1. Recommended Landing Pattern for PCBs ................................................................................................. 12
6.2. Multi-Layer PCB Layout .............................................................................................................................. 13
6.3. Single-Layer PCB Layout ........................................................................................................................... 14
7 Ordering Information ......................................................................................................................................... 15
8 Related Documents ........................................................................................................................................... 15
9 Glossary ............................................................................................................................................................ 16
10 Document Revision History ............................................................................................................................... 16
1
List of Figures
Figure 2.1
Figure 2.2
Figure 2.3
Figure 2.4
Figure 2.5
Figure 2.6
Figure 3.1
Figure 4.1
Figure 5.1
Figure 5.2
Figure 6.1
Figure 6.2
Figure 6.3
Figure 6.4
Figure 6.5
On Mode / Off Mode Characteristics ..................................................................................................... 7
On Mode Switching Behavior ................................................................................................................ 7
On Mode / Off Mode Quiescent Current I
q
............................................................................................. 7
Off Mode V
THRESH
Temperature Performance........................................................................................ 7
On Mode / Off Mode Transition Delay ................................................................................................... 8
Over-Current Retry Performance........................................................................................................... 8
ZSPM4121 Block Diagram .................................................................................................................... 8
Application Circuit for Disconnecting the Load ...................................................................................... 9
ZSPM4121 Package Drawing.............................................................................................................. 10
ZSPM4121 Pin Assignments (top view) .............................................................................................. 11
Recommended Landing Pattern for 8-Pin DFN ................................................................................... 12
Package and PCB Land Configuration for Multi-Layer PCB .............................................................. 13
JEDEC Standard FR4 Multi-Layer Board – Cross-Sectional View...................................................... 13
Conducting Heat Away from the Die using an Exposed Pad Package ............................................... 14
Application Using a Single-Layer PCB ................................................................................................ 14
© 2016 Integrated Device Technology, Inc.
3
January 29, 2016
ZSPM4121 Datasheet
List of Tables
Table 1.1
Table 1.2
Table 1.3
Table 1.4
Table 5.1
Absolute Maximum Ratings ................................................................................................................... 5
Thermal Characteristics for 8-Pin DFN (2mm x 2mm) Package ........................................................... 5
Recommended Operating Conditions ................................................................................................... 5
Electrical Characteristics ....................................................................................................................... 6
Pin Description, 8-Pin DFN (2x2)......................................................................................................... 11
© 2016 Integrated Device Technology, Inc.
4
January 29, 2016
ZSPM4121 Datasheet
1
ZSPM4121 Characteristics
Stresses beyond those listed under “Absolute Maximum Ratings” (section 1.1) may cause permanent damage to
the device. These are stress ratings only. Functional operation of the device at these or any other conditions
beyond those recommended under “Recommended Operating Conditions” (section 1.3) is not implied. Exposure
to absolute–maximum conditions for extended periods may affect device reliability.
1.1.
Absolute Maximum Ratings
Over operating free–air temperature range unless otherwise noted. All voltage values are with respect to network
ground terminal.
Table 1.1
Absolute Maximum Ratings
Parameter
Maximum voltage applied to the VCC, VOUT,and NPG pins
Electrostatic Discharge – Human Body Model, according to
the respective JESD22 JEDEC standard
Electrostatic Discharge – Charged Device Model, according to
the respective JESD22-C101 JEDEC standard
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10 seconds)
Symbol
Value
-0.3 to 6.0
2
500
Unit
V
kV
V
°C
°C
°C
T
J
T
stg
-20 to 85
-65 to 150
260
1.2.
Thermal Characteristics
Thermal Characteristics for 8-Pin DFN (2mm x 2mm) Package
Table 1.2
θ
JA
(°C/W)
73.1
1)
2)
1)
θ
JC
(°C/W)
10.7
2)
This rating assumes a FR4 board only.
This rating assumes a 1oz. copper JEDEC standard board with thermal vias. See section 6.1 for more information.
1.3.
Recommended Operating Conditions
Recommended Operating Conditions
Table 1.3
Parameter
Unregulated Supply Input at VCC Pin
Operating Ambient Temperature
Operating Junction Temperature
1)
1)
Symbol
V
CC
T
A
T
J
Min
1.2
-20
-20
Typ
Max
5.5
55
85
Unit
V
°C
°C
Operating ambient temperature is only intended as a guideline. The operating junction temperature requirements must not be
exceeded.
© 2016 Integrated Device Technology, Inc.
5
January 29, 2016
京公网安备 11010802033920号
EEWORLD
