Texas Instruments TPS780330220DDCT

Overview

TPS780330220DDCT from Texas Instruments is a 150-mA ultralow-power LDO regulator with pin-selectable dual-level output voltage (3.3 V / 2.2 V), 500 nA quiescent current, and 200 mV dropout at full load - designed for battery-powered MSP430™-based systems requiring dynamic voltage scaling during sleep/active modes.

For engineers reviewing the TPS780330220DDCT datasheet, TPS780330220DDCT pinout, TPS780330220DDCT application, or TPS780330220DDCT equivalent, key selection criteria include dual-voltage toggle via VSET pin, ±3% output accuracy over temperature/load, stability with 1.0-μF ceramic output capacitor, and TSOT23-5 package compatibility with space-constrained portable designs.

Technical Context

The TPS780330220DDCT implements factory-programmed EPROM-based dual-output voltage selection: driving VSET < 0.4 V selects 3.3 V (VOUT(HI)), while driving VSET > 1.2 V selects 2.2 V (VOUT(LO)). Its CMOS-compatible EN pin enables shutdown with 18 nA typical ground current, and internal current limiting (230 mA typ) plus thermal shutdown (160°C trip) ensure fault robustness.

This device operates across VIN = 2.2 V to 5.5 V and supports junction temperatures from –40°C to 125°C. It achieves 86 μVRMS output noise (100 Hz–100 kHz) and maintains 3% DC accuracy over line, load, and temperature - critical for precision analog and low-power MCU rails where supply ripple and drift directly impact system wake-up latency and ADC performance.

Key Specifications

Pinout & Package

TPS780330220DDCT is housed in a 5-pin TSOT23-5 (DDC) package measuring 2.90 mm × 1.60 mm, with exposed pad not present. Thermal design requires minimal copper area due to low power dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS780330220DDCT, TPS781330220DDCR trades 2× higher IQ for lower cost and identical functionality except thermal shutdown, while TPS7A0533PDBVR abandons DVS entirely to achieve 250 nA IQ - making TPS780330220DDCT the sole option balancing 500 nA IQ, hardware-toggled dual voltage, and integrated thermal protection.

Availability

TPS780330220DDCT is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical devices, and MSP430™-based embedded systems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS780330220DDCT 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 specializing in analog and embedded processing technologies, with leadership in low-power design and precision power management ICs.

The TPS780 family was engineered specifically for ultralow-power battery-operated applications - targeting dynamic voltage scaling in MSP430™ and similar ultra-low-IQ microcontrollers where milliampere-level standby currents are unacceptable.

FAQ

What output voltages does the TPS780330220DDCT support, and how are they selected?

The TPS780330220DDCT supports two factory-programmed output voltages: 3.3 V (VOUT(HI)) and 2.2 V (VOUT(LO)). Selection is performed via the VSET pin: drive VSET < 0.4 V to enable 3.3 V output, or >1.2 V to enable 2.2 V output. No external resistors or configuration registers are required - the toggle is purely hardware-based and immediate.

What is the minimum input voltage required for the TPS780330220DDCT to regulate 3.3 V output at 150 mA?

The TPS780330220DDCT requires a minimum input voltage of 3.5 V to regulate 3.3 V at 150 mA, based on its 200 mV typical dropout voltage specification. At higher temperatures or worst-case process corners, dropout may reach 250 mV, so 3.55 V is recommended for robust design margin across –40°C to 125°C operation.

Can the TPS780330220DDCT be used with a 0.47-μF output capacitor?

No - the TPS780330220DDCT requires a minimum 1.0-μF ceramic output capacitor for guaranteed stability across all operating conditions. Using 0.47 μF risks oscillation, degraded PSRR, and poor transient response. The datasheet explicitly specifies ≥1.0 μF, and TI's characterization confirms stability only within this range.

How does the TPS780330220DDCT behave during thermal shutdown?

When junction temperature exceeds 160°C, the TPS780330220DDCT activates thermal shutdown, disabling the pass element and forcing VOUT to drop. Output resumes automatically once TJ falls below 140°C (hysteresis = 20°C). During shutdown, ground current remains at 18 nA typical - preserving battery energy while protecting the device from permanent damage.

Is the TPS780330220DDCT pin-compatible with other devices in the TPS780xx family?

Yes - all TPS780xx variants in the DDC (TSOT23-5) package share identical pinout: IN, GND, EN, VSET/FB, OUT. This includes TPS780330220DDCT, TPS780180250DDCT, and TPS780300285DDCT. Layout reuse is fully supported, enabling voltage variant swaps without PCB revision.