Texas Instruments TPS7A1008PDSET

Overview

TPS7A1008PDSET from Texas Instruments is a 300-mA ultra-low-dropout linear regulator with dual-rail operation (VIN and VBIAS), fixed 0.8-V output, 70-mV max dropout at 300 mA (YKA package), ±1.5% output accuracy over –40°C to +125°C, and 1.6-µA typical VIN quiescent current. It powers ultra-low-voltage cores in space-constrained wearable devices.

For engineers reviewing the TPS7A1008PDSET datasheet, TPS7A1008PDSET pinout, TPS7A1008PDSET application, or TPS7A1008PDSET equivalent, key selection factors include its 0.75-V minimum input voltage, BIAS-assisted LILO operation, active output discharge (P-version), thermal shutdown at 160°C, and WSON-6 (DSE) package compatibility with high-density PCB layouts.

Technical Context

The TPS7A1008PDSET uses a dual-supply architecture: VIN supplies the pass element while VBIAS (1.7–5.5 V) powers internal control circuitry, enabling stable regulation down to 0.5 V output from inputs as low as 0.75 V. Its global UVLO requires both VIN > 675 mV (rising) and VBIAS > 1.54 V (rising) to enable operation.

It features an internal pulldown resistor (120 Ω) for active output discharge upon disable or thermal shutdown - a P-version-specific function confirmed in the datasheet's "Active Discharge" section and Pin Functions table. Startup time is 525–1200 µs with monotonic VOUT rise.

Key Specifications

Pinout & Package

TPS7A1008PDSET is packaged in a 1.50-mm × 1.50-mm WSON-6 (DSE) package with wettable flanks, optimized for automated optical inspection and high-density routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-dropout LDO applications.

Compared with TPS7A1108PDSET and MCP1804T-0802E/MB, the TPS7A1008PDSET uniquely supports 300-mA loads with dual-rail LILO operation, active discharge, and full –40°C to +125°C accuracy - making it the only option for high-current, ultra-low-input wearable power rails.

Availability

TPS7A1008PDSET is available at Aetrix Electronics and suitable for smart watches, wireless earbuds, camera modules, and portable medical devices requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for TPS7A1008PDSET 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TPS7A10 family is engineered for ultra-portable, battery-powered systems demanding sub-1-V operation, ultra-low quiescent current, and high accuracy - targeting wearables, hearables, and miniaturized IoT edge nodes.

FAQ

What is the minimum input voltage required for TPS7A1008PDSET to regulate 0.8 V?

The TPS7A1008PDSET requires a minimum VIN of 0.75 V, enabled by its LILO architecture using the BIAS pin. With VBIAS ≥1.7 V, it maintains regulation even when VIN is only 70 mV above VOUT (i.e., 0.87 V), but can start up and operate stably at VIN as low as 0.75 V per absolute specifications. This is confirmed in Section 6.3 (Recommended Operating Conditions) of the SBVS314B datasheet.

Does TPS7A1008PDSET support active output discharge, and how is it triggered?

Yes, TPS7A1008PDSET (P-version) includes active output discharge via an internal 120-Ω pulldown resistor connected to GND. It activates automatically when the EN pin is driven low (≤0.4 V) or when thermal shutdown occurs at 160°C. Discharge time depends on COUT and parallel load resistance, per Equation 1 in the datasheet's Section 7.3.3. This functionality is explicitly documented for the P-version in Pin Function descriptions and Feature Description.

What is the output voltage accuracy of TPS7A1008PDSET over temperature and load?

The TPS7A1008PDSET guarantees ±1.5% output voltage accuracy over the full operating junction temperature range (–40°C to +125°C), load current (0–300 mA), and input line variation (0.75–3.3 V). This is specified in Section 6.5 Electrical Characteristics under "Accuracy over temperature" for DSE and YKA packages. Typical accuracy at 25°C is ±0.5%, and load regulation is 0.2%/A.

Can TPS7A1008PDSET be used without connecting the BIAS pin?

No - the BIAS pin is mandatory for operation. The TPS7A1008PDSET requires VBIAS between 1.7 V and 5.5 V to power internal control circuitry. Leaving BIAS unconnected or below 1.46 V (UVLO rising threshold) prevents enablement, as confirmed by the global UVLO AND-gate logic in Figure 38 and Section 7.3.2. BIAS must be decoupled with ≥0.1 µF ceramic capacitor.

What package type and dimensions does TPS7A1008PDSET use?

TPS7A1008PDSET uses the WSON-6 (DSE) package: 1.50 mm × 1.50 mm body size with 0.5-mm pitch, wettable flanks, and exposed thermal pad. This is confirmed in the "Device Information" table (page 2) and Pin Configuration diagrams (page 3) of the SBVS314B datasheet. It is distinct from the 5-pin DSBGA (YKA) variant.