Texas Instruments TPS7A1308PYCKR

Overview

TPS7A1308PYCKR from Texas Instruments is a 300-mA ultra-low-dropout linear regulator (LDO) designed for low-voltage, high-efficiency power delivery in space-constrained portable electronics. It operates with input voltage as low as 0.7 V, delivers fixed 0.8-V output with ±1% accuracy over load/line/temperature, and achieves only 65 mV dropout at 300 mA - enabling use directly after high-efficiency DC/DC converters in battery-powered systems.

For engineers reviewing the TPS7A1308PYCKR datasheet, TPS7A1308PYCKR pinout, TPS7A1308PYCKR application, or TPS7A1308PYCKR equivalent, key selection considerations include its dual-rail architecture (IN + BIAS), active output discharge, 20-μs load transient response (20 mV deviation), and DSBGA-6 package compatibility with sub-1-mm² layouts in wearables and camera modules.

Technical Context

The TPS7A1308PYCKR uses a dual-supply architecture: the IN pin carries the main power path (0.7–2.2 V), while the BIAS pin (2.2–5.5 V) independently powers internal reference and control circuitry - decoupling regulation stability from ultra-low VIN constraints. This enables operation with VIN as low as VOUT + 100 mV while maintaining full PSRR (80 dB @ 1 kHz) and accuracy.

It integrates foldback current limiting (ICL = 320–750 mA, ISC = 177 mA), global UVLO on both IN (603 mV typ.) and BIAS (1.42 V typ.), thermal shutdown (165°C), and an active pulldown circuit (RPULLDOWN = 36 Ω) for controlled output discharge during disable. The SENSE pin supports remote feedback to compensate for PCB trace resistance.

Key Specifications

Pinout & Package

TPS7A1308PYCKR is housed in a 6-bump, 0.35-mm pitch wafer-chip-scale package (DSBGA-6, YCK), measuring 0.71 mm × 1.0 mm with bottom-side solder bumps. The package is optimized for minimal footprint and thermal performance in thin-profile portable devices.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-VIN, low-VOUT LDO applications.

Compared with XC6216D082MR-G and RT9080ALGQW, the TPS7A1308PYCKR uniquely supports sub-1-V input with full specification compliance (accuracy, PSRR, transient) due to its dedicated BIAS rail - making it the only option among the three viable for LILO (low-input, low-output) architectures where VIN ≤ VOUT + 100 mV.

Availability

TPS7A1308PYCKR is available at Aetrix Electronics and suitable for camera modules, wireless earbuds, and smart watches requiring stable component supply, long-term lifecycle support, and consistent DSBGA-6 packaging for automated assembly.

Supply support for TPS7A1308PYCKR 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 specializing in analog, embedded processing, and power management technologies, with decades of LDO design expertise and broad automotive/industrial qualification.

The TPS7A13 family was engineered specifically for ultra-low-voltage, high-transient-performance power delivery in battery-constrained portable electronics - addressing the need for LILO regulation without sacrificing accuracy, noise, or thermal behavior.

FAQ

What is the minimum input voltage required for TPS7A1308PYCKR to regulate at 0.8 V?

The TPS7A1308PYCKR requires VIN ≥ VOUT + 100 mV for full specification compliance, meaning 0.9 V minimum input under recommended conditions. Its absolute minimum operating VIN is 0.7 V, but regulation accuracy, PSRR, and transient response are only guaranteed at VIN ≥ 0.9 V. The BIAS pin (≥2.2 V) must also be powered for stable operation.

Does TPS7A1308PYCKR support remote voltage sensing, and how is it implemented?

Yes, TPS7A1308PYCKR supports remote sensing via the SENSE pin (B1). To implement, connect SENSE directly to the load side of the output trace - not to the OUT pin - to compensate for IR drop across PCB copper. This configuration improves output voltage accuracy at the point-of-load, especially critical for high-current, low-voltage rails in camera sensors and SoCs.

What is the purpose of the BIAS pin on TPS7A1308PYCKR, and what happens if it's unpowered?

The BIAS pin powers internal reference, error amplifier, and control circuitry independently of the main IN rail. If unpowered (VBIAS < 1.15 V), the global UVLO disables the device - no output regulation occurs, even if VIN is valid. BIAS must be ≥2.2 V (or VOUT + 1.4 V) for guaranteed operation; typical bias current is 5 mA at 300 mA load.

How does the active output discharge function work in TPS7A1308PYCKR, and what is its resistance value?

The TPS7A1308PYCKR uses an internal MOSFET pulldown circuit activated during disable (EN low), thermal shutdown, or UVLO. It connects a 36-Ω resistor between OUT and GND to actively discharge output capacitance. Discharge time depends on COUT and parallel load resistance; for example, a 10-µF capacitor discharges to 10% in ~0.8 ms with no external load.

Can TPS7A1308PYCKR be used without the EN pin, and what is the recommended connection?

Yes, the EN pin is optional. If enable functionality is not needed, connect EN directly to either the IN pin or the BIAS pin - both provide sufficient voltage (>0.6 V) to maintain active operation. Leaving EN floating is not allowed; it must be tied to a valid logic-high source to prevent unintended disable events due to noise or leakage.