Texas Instruments LMS33460MG

Overview

LMS33460MG from Texas Instruments is a micropower 3-V undervoltage detector IC with open-drain output, designed for precision supply monitoring in battery-powered systems. It features a 3.0 V ±150 mV detection threshold, 1 µA typical quiescent current at 2.87 V input, built-in 150 mV hysteresis, and operates across –40°C to 85°C. It serves as a reset generator for microcontrollers in handheld instruments and low-power embedded devices.

For engineers reviewing the LMS33460MG datasheet, LMS33460MG pinout, LMS33460MG application, or LMS33460MG equivalent, this page delivers verified technical context, real-world design meaning of key specs, SC70 package layout guidance, functional alternatives, and supply-chain support tailored for OEM and industrial design programs.

Technical Context

The LMS33460MG uses an on-chip precision voltage reference and comparator to monitor VIN continuously. Its active-low open-drain output requires an external pull-up resistor (e.g., 470 kΩ) and transitions low when VIN falls below 2.85 V (min), returning high only after VIN rises above 3.15 V due to 150 mV hysteresis.

This architecture prevents chatter during slow-rising or noisy supply conditions. The device draws ≤2.2 µA at 25°C and 2.87 V input, supports input voltages from 0.7 V to 7 V, and delivers 0.6 mA sink capability at VOUT = 0.05 V - enabling direct interface with logic inputs or reset pins without buffering.

Key Specifications

Pinout & Package

Package: SC70-5 (DCK), 2.00 mm × 1.25 mm body size, 1.1 mm max height, JEDEC MO-203 compliant. Pin 1 marked with index area; pin 1 quadrant Q3 in tape.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar undervoltage detector applications.

Compared with TLV809E33DBZR and MAX809SEUR+T, the LMS33460MG offers the lowest quiescent current (1 µA) and true 3.0 V threshold with hysteresis - making it optimal for long-life, precision brownout detection where open-drain flexibility and minimal loading are critical.

Availability

LMS33460MG is available at Aetrix Electronics and suitable for battery-operated equipment, handheld instruments, and microcontroller reset generation requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for LMS33460MG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in power management, signal chain, and high-reliability ICs.

The LMS33460MG belongs to TI's precision voltage supervisor product line, engineered specifically for ultra-low-power undervoltage detection in portable and battery-critical systems where accuracy, size, and current efficiency are primary design constraints.

FAQ

What is the exact detection threshold voltage of the LMS33460MG?

The LMS33460MG has a nominal detection threshold of 3.0 V with a guaranteed range of 2.85 V to 3.15 V under standard test conditions (TJ = 25°C). This threshold applies when VIN is falling; the rising threshold is 3.0 V plus built-in hysteresis (150 mV typical), resulting in a release point of 3.15 V. The device's ±120 PPM/°C temperature coefficient ensures stable performance across –40°C to 85°C.

Does the LMS33460MG require an external pull-up resistor, and why?

Yes, the LMS33460MG requires an external pull-up resistor on its open-drain VOUT pin because it cannot drive high actively. TI recommends a 470 kΩ resistor to the appropriate logic rail (e.g., 3.3 V or 5 V), which sets the rise time and ensures compatible voltage levels for downstream logic inputs. Without this resistor, VOUT remains floating and cannot assert a valid high state - a fundamental requirement for proper reset or indicator functionality.

Can the LMS33460MG monitor input voltages below 1 V?

No - the LMS33460MG has a minimum operating input voltage of 0.7 V (typical) but a guaranteed minimum of 1.1 V per electrical characteristics. Below ~1.1 V, the internal reference and comparator may not function reliably, and detection behavior is not specified. For sub-1-V monitoring, alternative supervisors such as the TPS3839 series (with 0.9 V thresholds) should be considered instead of the LMS33460MG.

What is the maximum sink current capability of the LMS33460MG's VOUT pin?

The LMS33460MG's VOUT pin can sink up to 0.6 mA while maintaining VOUT ≤ 0.05 V at VIN = 1.1 V, and up to 11 mA while holding VOUT ≤ 0.5 V at VIN = 1.5 V. This sink strength allows direct driving of LEDs or logic inputs without additional transistors, though sustained loads above 1 mA should consider thermal derating in the SC70 package. The absolute maximum continuous output current is rated at 30 mA.

Is the LMS33460MG RoHS-compliant and lead-free?

Yes, the LMS33460MG/NOPB.A is RoHS-compliant and lead-free, with Sn (tin) lead finish and Level-1 moisture sensitivity rating (260°C peak reflow). The "NOPB" suffix explicitly denotes lead-free packaging, and TI's official packaging addendum confirms full compliance with EU RoHS Directive 2011/65/EU and China RoHS. All units shipped by Aetrix Electronics meet these environmental specifications.