Texas Instruments TPS781250200DDCR

Overview

TPS781250200DDCR from Texas Instruments is a 150mA ultralow-power LDO regulator in TSOT-23-5 package, featuring pin-selectable dual output voltages (2.5V HIGH / 2.0V LOW), 1µA quiescent current, and 200mV dropout at full load. It serves as a system-level power rail for microcontroller sleep/wake mode switching in battery-powered handheld devices.

For engineers reviewing the TPS781250200DDCR datasheet, TPS781250200DDCR pinout, TPS781250200DDCR application, or TPS781250200DDCR equivalent, key selection criteria include dual-voltage dynamic scaling capability, CMOS-compatible enable/VSET logic thresholds, thermal shutdown behavior, and stability with 1.0µF ceramic output capacitance.

Technical Context

This device implements a factory-programmed EPROM-based voltage selection architecture that fixes VOUT(HIGH) = 2.5V and VOUT(LOW) = 2.0V. The VSET pin toggles between levels using standard CMOS logic thresholds (VSET < 0.4V selects 2.5V; VSET > 1.2V selects 2.0V), with internal active pull-down ensuring fast low-to-high transitions.

It integrates bandgap reference, current-limit protection (230mA typ), thermal shutdown (+140°C reset), and operates across –40°C to +125°C junction temperature. Input voltage range is 2.2V–5.5V, and it achieves ±2% DC output accuracy over line/load/temperature.

Key Specifications

Pinout & Package

TPS781250200DDCR uses the TSOT-23-5 package (2.9mm × 1.6mm × 1.0mm height), optimized for space-constrained portable designs. Thermal performance is characterized with RθJA = 200°C/W on standard JEDEC high-K board.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-level LDO applications.

Compared with TPS781250200DDCR, TPS781220250DDCR offers inverted voltage sequencing for different power-state hierarchies, while TPS780330220DRV delivers superior thermal efficiency and nanoamp-level IQ at the cost of larger package size and different pin count.

Availability

TPS781250200DDCR is available at Aetrix Electronics and suitable for wireless handsets, portable medical sensors, and smoke detector designs requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for TPS781250200DDCR 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies.

The TPS781 series was designed specifically for battery-powered applications needing ultralow IQ and hardware-selectable dual output voltages-targeting MSP430-based systems, memory cards, and safety-critical portable electronics.

FAQ

What are the factory-programmed output voltages of the TPS781250200DDCR?

The TPS781250200DDCR is factory-programmed with two fixed output voltages: VOUT(HIGH) = 2.5V (selected when VSET ≤ 0.4V) and VOUT(LOW) = 2.0V (selected when VSET ≥ 1.2V). These values are permanently set using EPROM technology and cannot be altered in-circuit. Both voltages maintain ±2% accuracy across –40°C to +125°C junction temperature and full 0–150mA load range.

Can the TPS781250200DDCR operate with an input voltage below 2.5V?

Yes, the TPS781250200DDCR supports input voltages as low as 2.2V. When regulating to 2.0V output, its 200mV dropout allows operation down to VIN = 2.2V. At 2.5V output, minimum VIN is 2.7V (2.5V + 200mV). Operation below 2.2V violates absolute maximum ratings and may cause undefined behavior or damage.

How does the VSET pin toggle between output voltages on the TPS781250200DDCR?

The VSET pin on the TPS781250200DDCR acts as a logic-select input: driving it to ≤0.4V selects 2.5V output; driving it to ≥1.2V selects 2.0V output. The internal circuitry includes hysteresis to prevent chatter near threshold. Transition time is 800µs under 150mA load, and VSET draws only 70nA, making it compatible with weak GPIOs like those on MSP430 LPM3.

Is the TPS781250200DDCR stable with less than 1.0µF output capacitance?

No-the TPS781250200DDCR requires a minimum 1.0µF ceramic output capacitor for guaranteed stability across all operating conditions. Using smaller values risks oscillation or poor transient response. The capacitor must be X5R/X7R dielectric, placed adjacent to the OUT and GND pins with short, low-inductance traces.

Does the TPS781250200DDCR include overcurrent and thermal protection?

Yes, the TPS781250200DDCR integrates both current-limit protection (trip point 230mA typical) and thermal shutdown (activate at +160°C, reset at +140°C). These functions operate independently of EN and VSET states. During fault conditions, the device limits output current and shuts down safely without latch-up, resuming normal operation once temperature and load normalize.