Texas Instruments TPS7A1110PYKAR

Overview

TPS7A1110PYKAR from Texas Instruments is a 500-mA, ultra-low dropout linear regulator optimized for sub-1-V core supplies in battery-powered systems. It operates with input voltage as low as 0.75 V (via IN pin) and supports output voltages down to 0.5 V with ±1.5% accuracy over load, line, and temperature. Its dual-rail architecture uses separate IN and BIAS pins - the latter powered from 1.7–5.5 V - enabling high efficiency in low-input/low-output (LILO) configurations such as SSDs and camera modules.

For engineers reviewing the TPS7A1110PYKAR datasheet, TPS7A1110PYKAR pinout, TPS7A1110PYKAR application, or TPS7A1110PYKAR equivalent, key selection criteria include its 110-mV max dropout at 500 mA (YKA package), 1.6 µA typical IN-quiescent current, active output discharge, 64 dB PSRR at 1 kHz, and compatibility with 0.1–22 µF ceramic output capacitors.

Technical Context

The TPS7A1110PYKAR implements a dual-supply LDO architecture: the IN pin delivers power to the pass element while the BIAS pin powers internal control circuitry, decoupling regulation performance from ultra-low input rails. This enables stable operation when VIN is only 110 mV above VOUT - critical for powering modern MCU cores and analog sensors supplied by buck converters.

It integrates global UVLO (with independent rising/falling thresholds on IN and BIAS), thermal shutdown at 160°C, foldback current limiting (920 mA typical), and an active pulldown circuit (120 Ω) for controlled output discharge during disable. The device requires no external compensation and supports COUT values from 2.2 µF to 22 µF with ESR < 250 mΩ.

Key Specifications

Pinout & Package

TPS7A1110PYKAR is housed in a 0.74-mm × 1.09-mm, 5-pin DSBGA (YKA) package with 0.35-mm pitch and bottom-side solder terminals. Thermal performance is enhanced via direct die attachment to PCB copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A1110DRVR, the TPS7A1110PYKAR offers superior board-area efficiency (0.81 mm² vs 4.0 mm²) and lower thermal resistance to board (55.4°C/W), making it optimal for ultra-compact wearables; versus TPS7A0510PDBVR, it delivers 2.5× more current and 60% lower dropout under identical 1.0-V/500-mA conditions, enabling higher-performance subsystems.

Availability

TPS7A1110PYKAR is available at Aetrix Electronics and suitable for smart wearables, camera modules, portable SSDs, and low-power medical devices requiring stable component supply with guaranteed long-term sourcing.

Supply support for TPS7A1110PYKAR 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 for portable and industrial applications.

The TPS7A11 family was engineered specifically for ultra-low-voltage, ultra-low-power systems - targeting battery-operated devices needing sub-1-V core rails, minimal quiescent current, and robust transient response without external compensation.

FAQ

What is the minimum input voltage required for TPS7A1110PYKAR to regulate 1.0 V output?

The TPS7A1110PYKAR requires a minimum input voltage of 0.75 V on the IN pin. However, to maintain regulation at 1.0 V output with 500-mA load, VIN must exceed VOUT by at least the dropout voltage - 110 mV maximum - so practical minimum is 1.11 V. The BIAS pin (1.7–5.5 V) powers internal circuitry independently, enabling this ultra-low VIN operation.

Does TPS7A1110PYKAR support active output discharge, and how does it work?

Yes, TPS7A1110PYKAR includes active output discharge. When the EN pin is driven low or thermal shutdown activates, an internal 120-Ω pulldown resistor connects OUT to GND. Discharge time depends on output capacitance and parallel load resistance per t = 120·RL/(120+RL)·COUT. This ensures rapid, controlled VOUT collapse for reliable power sequencing.

Can TPS7A1110PYKAR operate without connecting the BIAS pin?

No. The BIAS pin is mandatory and must be connected to a 1.7–5.5 V supply with ≥0.1 µF ceramic capacitor to GND. It powers the internal reference, error amplifier, and control logic. Leaving BIAS unconnected or below 1.7 V prevents regulation, as confirmed by the global UVLO that ANDs both IN and BIAS enable conditions.

What is the recommended output capacitor range for stable operation of TPS7A1110PYKAR?

The TPS7A1110PYKAR is stable with ceramic output capacitors from 2.2 µF to 22 µF, provided ESR remains below 250 mΩ. TI recommends 2.2 µF as nominal value; larger values (e.g., 10–22 µF) improve load transient response and PSRR at higher frequencies. X5R or X7R dielectrics are preferred for temperature stability.

How does the dual-rail architecture of TPS7A1110PYKAR improve efficiency compared to single-rail LDOs?

The dual-rail architecture separates power delivery (IN) from control logic (BIAS), allowing the IN rail to operate at ultra-low voltages (e.g., 1.11 V for 1.0 V out) while BIAS runs at higher, more efficient voltage (e.g., 3.3 V). This avoids the quiescent current penalty of single-rail LDOs forced to derive control power from the same low VIN, improving overall system efficiency by up to 15% in LILO applications.