RT9819D-13GV

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	292 ms Minimum
Voltage - Threshold:	1.3V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3

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Introduction

The RT9819D-13GV is an integrated circuit that is used for PMIC (Power Management Integrated Circuit) supervisors. It is derived from Richtek’s ‘System Supervisor IC’ product family and is made to specifically perform tasks related to the power management of microprocessor systems.

Features

The RT9819D-13GV is capable of providing low power supervision for battery-powered, portable computing systems. Its slew rate control and low quiescent current noise suppression make it ideal for applications such as laptops, cellular phones and PDAs. Its integrated watchdog timer and power supply reset circuitry can be used to mitigate the effects of system hang and other power irregularities. For automation, the device provides programmable delay periods, voltages and thresholds.

Functionality

The RT9819D-13GV is able to provide comprehensive power management features such as system reset, soft reset, power supply sequencing, power good indication and power-fail warning. It also features temperature indication and voltage regulation. Additionally, its in-system programmability enables automatic switching between input supplies and sequencing of power domains. The device’s wide operating voltage range of 4.5V to 20V makes it suitable for use in applications such as audio power amplifiers and embedded systems.

Technical Specifications

The RT9819D-13GV has specifications of a junction temperature range of -40°C to 85°C and a supply voltage range of 4.5V to 20V. It also has number of features such as programmable delay periods and thresholds, thermal warnings and a 1.2V internal reference voltage. The device also has a power supply reset window that has a ±15% accuracy and a power-on reset with a minimum pulse width of 10ms.

Application Fields

The RT9819D-13GV is suitable for use in a wide range of applications which include computers, cell phones, PDAs, digital cameras, gaming devices and audio power amplifiers. It can also be used in embedded systems and automotive applications. It has a wide range of operational voltages and its device reduction, low power consumption, slew rate and noise suppression make it a highly efficient choice for many application fields.

Working Principle

The RT9819D-13GV works by monitoring the input supply voltage and generating an internal reset signal based on a preset threshold. It then offers features such as window comparators and detection of power supply rising and falling times. The device also provides an adjustable delay timer which helps ensure proper sequencing of power sources. Furthermore, the device also provides thermal warning indication and over-temperature protection.

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