DS1232+

Series:	MicroMonitor™
Packaging:	Tube
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain, Push-Pull
Reset:	Active High/Active Low
Reset Timeout:	Adjustable/Selectable
Voltage - Threshold:	4.37V, 4.62V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Through Hole
Package / Case:	8-DIP (0.300", 7.62mm)
Supplier Device Package:	8-PDIP
Base Part Number:	DS1232

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Introduction

PMIC (Power Management Integrated Circuits) are gaining more attention from the industry due to their significant role in managing and conserving power in a wide range of electronic equipments such as laptops, mobile phones, and other battery-powered electronic devices. A PMIC supervisor is an example of a PMIC, and is responsible for controlling circuitry to improve system performance. One such example is the DS1232+ PMIC Supervisor. This article will outline and explain the application field and working principle of this device.

Application Field

Designs for electronic devices must consider the minutiae associated with managing individual blocks within the system\'s power architecture. DS1232+ PMIC Supervisor is designed to simplify the power management design process and help engineers to optimize the architecture and components.DS1232+ PMIC Supervisor is ideal for designs benefiting from:

• Battery and supercapacitor charging
• Meeting numerous power system requirements
• Active power control
• Reducing the number of discrete components and PCB area

Designs located in the market, where power saving and lightness are important, are the perfect application for the DS1232+. Examples of power saving and lightness include but are not limited to, laptop, mobile phone and IoT (Internet of Things) designs.

Working Principle

The DS1232+ PMIC Supervisor integrates five management functions which include an LDO, a supervisor, a charge pump, a trickle charger and a low dropout linear regulator. The functions are all controlled by the integrated controller and the following Working Principle will explain in detail how each function operates:

LDO (Low Drop Out Regulator)

The LDO regulator is designed to maintain the output current level under different load conditions. It is also integrated with an over-current protection feature that protects the system and allows it to be used in applications involving high current levels. The operating range of the LDO is 2.2V to 5.5V, depending on the design.

Supervisor

The integrated supervisor is designed to monitor the voltage levels of the system. It is capable of generating reset pulses, which allows the system to be rebooted whenever a fault occurs. It also supports overvoltage and undervoltage protection, helping improve system stability. The operating threshold range for the supervisor is 0.8V to 5.5V, and it is programmed with a 6V detection margin.

Charge Pump

The underlying technology of the charge pump is a two-stage process. In the first stage, power is transferred from the input voltage to the output voltage. The second stage reduces the output voltage further, allowing the output current required for powering various system components to be safely achieved. It has an operating range from 2V to 6V and it can deliver up to 25mA of peak current.

Trickle Charger

The trickle charger is designed to charge a supercapacitor without any external components. It is capable of charging a 2.7-volt supercapacitor in both 18 and 36 minutes. It has an operating range of 5V to 6V, and it supports 2.7V to 4.2V supercapacitor charging.

Low Dropout Linear Regulator

The low dropout linear regulator is designed to maintain a stable output voltage with minimal power loss. It also has an integrated overcurrent protection feature, as well as overvoltage and undervoltage protection. The operating range of the LDO linear regulator is 2.2V to 6V, and it supports up to 300mA.

Conclusion

The DS1232+ PMIC supervisor offers time-saving and power-saving advantages over traditional designs. By integrating five different functions into a single package, the DS1232+ helps reduce size, cost and power. It is especially suitable for laptop, mobile phone and IoT designs, where the main goal is to maximize power efficiency and reduce the size of the board. The DS1232+ also supports numerous components, making it the perfect choice for any power management application.

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