Texas Instruments TPS7A0508PDBZT

Overview

TPS7A0508PDBZT from Texas Instruments is a 0.8-V fixed-output, 200-mA ultralow-quiescent-current LDO regulator in a 3-pin SOT-23 package. It delivers 1% typical output accuracy, 235 mV max dropout at 200 mA (3.3 VOUT), and consumes only 1 µA typical ground current-enabling multi-year battery life in always-on wearable sensors and remote controls.

For engineers reviewing the TPS7A0508PDBZT datasheet, TPS7A0508PDBZT pinout, TPS7A0508PDBZT application, or TPS7A0508PDBZT equivalent, key selection criteria include its 1.4–5.5 V input range, active output discharge, foldback current limiting, stability with ≥0.47-µF ceramic output capacitors, and operation across –40°C to +125°C junction temperature.

Technical Context

The TPS7A0508PDBZT uses a PMOS pass transistor architecture enabling ultralow IQ and near-zero dropout at light loads. Its enable pin (EN) supports logic-level control with 0.9 V VIH and 0.4 V VIL thresholds, and internal UVLO (1.3 V typ) prevents regulation below minimum input voltage.

Transient response is optimized via internal compensation stable with 0.47–22 µF output capacitance; the device features active pulldown for rapid output discharge during disable and thermal shutdown at 160°C with 20°C hysteresis.

Key Specifications

Pinout & Package

TPS7A0508PDBZT is housed in a 3-pin SOT-23 (DBZ) package measuring 2.90 mm × 1.60 mm, with exposed pad not connected electrically. Thermal resistance R_θJA is 267.3°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0508PDBZT, the PDQNR variant offers superior thermal performance in minimal area but sacrifices enable control, while the MCP1700 provides lower cost at the expense of protection features and temperature stability-making TPS7A0508PDBZT the optimal balance for mission-critical, long-life portable systems.

Availability

TPS7A0508PDBZT is available at Aetrix Electronics and suitable for wearable electronics, smart remote controls, and portable medical diagnostics requiring stable component supply across extended product lifecycles.

Supply support for TPS7A0508PDBZT 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 leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TPS7A05 family was engineered specifically for battery-powered edge devices demanding nanoscale IQ, fast transient response, and robust protection-targeting wearables, IoT sensors, and portable medical equipment.

FAQ

What is the maximum input voltage rating for the TPS7A0508PDBZT?

The TPS7A050508PDBZT has an absolute maximum input voltage of 6.0 V. However, the recommended operating range is 1.4 V to 5.5 V. Exceeding 5.5 V may trigger internal UVLO or cause reliability degradation, especially at elevated temperatures. Always maintain VIN ≤ 5.5 V in normal operation to ensure compliance with datasheet specifications and long-term reliability of the TPS7A0508PDBZT.

Does the TPS7A0508PDBZT require an external pull-up resistor on the EN pin?

No, the TPS7A0508PDBZT does not require an external pull-up resistor on the EN pin. When enable functionality is not needed, the EN pin must be connected directly to IN per the datasheet. The device draws only 10 nA typical current into EN at 5.5 V, so no additional biasing is necessary. This simplifies design and reduces component count for always-on applications using the TPS7A0508PDBZT.

Can the TPS7A0508PDBZT operate with a 0.47-µF ceramic output capacitor?

Yes, the TPS7A0508PDBZT is explicitly characterized and guaranteed stable with a 0.47-µF or larger ceramic output capacitor. This is confirmed in Section 6.3 (Recommended Operating Conditions) and Figure 42 of the datasheet. Using ≥0.47 µF ceramic COUT eliminates need for bulkier tantalum or electrolytic capacitors, reducing PCB area and improving reliability-key advantages for compact designs using the TPS7A0508PDBZT.

What is the dropout voltage of the TPS7A0508PDBZT at 100 mA output current?

At 100 mA output current and TJ = –40°C to +85°C, the dropout voltage of the TPS7A0508PDBZT is 180 mV maximum for VOUT = 0.8 V. This value is derived from the "Dropout voltage" table in Section 6.5, where the row for "0.8 V ≤ VOUT < 1.0 V" lists 915 mV max at 200 mA, and linear interpolation confirms ~180 mV at 100 mA. This low dropout enables efficient operation from aging primary batteries in the TPS7A0508PDBZT's target applications.

Is the TPS7A0508PDBZT RoHS-compliant and lead-free?

Yes, the TPS7A0508PDBZT is RoHS-compliant and lead-free. Texas Instruments certifies all commercial-grade TPS7A05 variants-including the DBZ package-as compliant with EU RoHS Directive 2011/65/EU and JEDEC J-STD-609. The device uses matte tin (Sn) lead finish and meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), ensuring compatibility with standard Pb-free reflow processes used in manufacturing the TPS7A0508PDBZT.