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TPS386596L33DGKR

4-ch voltage supervisor, 2.9V fixed + 3x adj, 0.25% accuracy, 7uA Iq, manual reset, VSSOP-8

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Manufacturer Part：

TPS386596L33DGKR

Package：

VSSOP-8 (3.00 x 3.00 x 0.95 mm)

Brand：

Product Categories：

Low Dropout Regulators (LDO)

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Description

Product Overview

The TPS386596L33DGKR from Texas Instruments is a quad-channel voltage supervisor with manual reset input in an 8-pin VSSOP package. SVS-1 monitors a fixed 2.9V threshold for 3.3V rails, while SVS-2/3/4 are adjustable down to 0.4V with 0.25% typical threshold accuracy.

Key Specifications

Monitored Voltages	4 channels
SVS-1 Threshold	2.9V fixed (for 3.3V rail)
SVS-2/3/4 Threshold	Adjustable down to 0.4V
Threshold Accuracy	0.25% typical
Reset Delay	50 ms fixed
Manual Reset	Active-low MR input
Quiescent Current	7 uA typical
Supply Voltage	1.8 V to 6.5 V
Reset Output	Open-drain, active-low
Operating Temperature	-40°C to +125°C
Package	VSSOP-8 (3.0mm x 3.0mm)

Features

Four-channel voltage monitoring with one fixed 2.9V and three adjustable thresholds
0.25% typical threshold accuracy for precise voltage monitoring
Ultra-low 7uA quiescent current for battery-powered applications
Active-low manual reset input with internal 100k pull-up
Fixed 50ms reset timeout with open-drain active-low RESET output

Applications

FPGA and processor multi-rail power monitoring
Multi-voltage system supervision in industrial equipment
Power supply sequencing and reset generation

Product Introduction:TPS386596L33DGKR Product Introduction

The TPS386596L33DGKR from Texas Instruments is a quad-channel voltage supervisor that monitors four power rails and asserts the RESET signal when any SENSE input drops below its respective threshold. SVS-1 monitors a 3.3V nominal power supply with a fixed 2.9V threshold, requiring no external components. SVS-2, SVS-3, and SVS-4 are adjustable using external resistor dividers and can monitor any supply voltage higher than 0.4V. All SENSE inputs feature 0.25% typical threshold accuracy. The device includes an active-low manual reset (MR) input with an internal 100k pull-up to VDD and a 50ns deglitch circuit. The open-drain active-low RESET output deasserts after a fixed 50ms delay, suitable for connecting to processor reset inputs or regulator enable pins. The ultra-low 7uA quiescent current makes it ideal for battery-powered applications.

Working Principle:TPS386596L33DGKR Working Principle

The TPS386596L33DGKR monitors four power supply rails using precision comparators. (1) Fixed Threshold (SVS-1): An internal resistor divider sets the SENSE1 threshold at 2.9V for monitoring 3.3V rails. When SENSE1 drops below 2.9V, the comparator output asserts RESET. (2) Adjustable Threshold (SVS-2/3/4): External resistor dividers scale the monitored voltage down to the internal 0.4V reference. The target trip voltage is calculated as V_target = (1 + RSnH/RSnL) x 0.4V. (3) Reset Logic: A NOR gate combines all four comparator outputs and the MR input. If any input indicates a fault, RESET is asserted low. RESET is released only when all SENSE inputs are above their thresholds and MR is high, after a fixed 50ms timeout. (4) Manual Reset: The MR pin allows firmware or external logic to initiate a reset. An internal 100k pull-up holds MR high when unconnected. A 50ns deglitch filter prevents noise from triggering false resets.

Pin Description:TPS386596L33DGKR Pin Definition and Functions

Pin	Name	Function
1	VDD	Supply voltage (1.8-6.5V)
2	SENSE1	Fixed 2.9V threshold input (3.3V rail)
3	SENSE2	Adjustable threshold input
4	GND	Ground
5	RESET	Open-drain reset output (active low)
6	MR	Manual reset input (active low, internal pull-up)
7	SENSE4	Adjustable threshold input
8	SENSE3	Adjustable threshold input