Texas Instruments TPS7A11105PYKAR

Overview

TPS7A11105PYKAR from Texas Instruments is a 500-mA, ultra-low dropout linear regulator (LDO) with dual-supply architecture (IN + BIAS), fixed 1.05-V output, 0.75-V minimum input voltage, 110-mV max dropout at 500 mA (YKA package), and 1.5% output accuracy over load/line/temperature - designed for powering low-voltage cores in space-constrained portable electronics.

For engineers reviewing the TPS7A11105PYKAR datasheet, TPS7A11105PYKAR pinout, TPS7A11105PYKAR application, or TPS7A11105PYKAR equivalent, this page delivers verified package mapping (DSBGA-5), confirmed pin functions (IN/OUT/GND/BIAS/EN), thermal performance data (RθJA = 169.4°C/W), active discharge capability, and real-world selection guidance against comparable LDOs for battery-powered wearables and sensor subsystems.

Technical Context

The TPS7A11105PYKAR implements a dual-rail architecture where the IN pin supplies power to the pass element while the BIAS pin powers internal control circuitry - enabling stable regulation down to 0.75 V input and 1.05 V output. Its global UVLO combines independent IN and BIAS undervoltage detection (675 mV rising, 600 mV falling on IN; 1.54 V rising, 1.44 V falling on BIAS) via an AND gate to ensure safe startup.

This device uses a foldback current-limit protection scheme (920 mA typical short-circuit limit), thermal shutdown at 160°C, and an active pulldown circuit (120-Ω internal resistor) activated on EN deassertion or thermal fault - delivering known-state shutdown and fast output discharge without external components.

Key Specifications

Pinout & Package

TPS7A11105PYKAR is housed in a 0.74-mm × 1.09-mm, 5-pin DSBGA (YKA) package with 0.35-mm pitch and bottom-side solder pads. Thermal performance relies on proper PCB pad layout per TI SLLA323.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B102MR-G and ADP125ARHZ-1.05-R7, TPS7A11105PYKAR uniquely supports true LILO (low-input, low-output) operation via its BIAS rail, delivers superior dropout performance in the smallest footprint, and integrates coordinated UVLO and active discharge - making it the only viable option for next-gen wearables requiring >10-year shelf life and sub-3-V battery cutoff.

Availability

TPS7A11105PYKAR is available at Aetrix Electronics and suitable for smart wearables, camera modules, wireless earbuds, portable medical devices, and solid-state drives requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for TPS7A11105PYKAR 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 power management ICs for portable and industrial applications.

The TPS7A11 family was engineered specifically for ultra-low-voltage, ultra-low-power battery-operated systems - targeting applications where input voltage may dip below 1 V while maintaining precise, noise-free core regulation.

FAQ

What is the exact output voltage tolerance of the TPS7A11105PYKAR over temperature and load?

The TPS7A11105PYKAR guarantees ±1.5% output voltage accuracy over –40°C to +125°C junction temperature, full load range (1–500 mA), and line variation (0.75–3.3 V input). This specification is validated per TI's SBVS316B datasheet Section 6.5, with worst-case deviation measured at –40°C to +125°C under maximum load and minimum input conditions. The TPS7A11105PYKAR does not require external trimming to meet this spec.

Does the TPS7A11105PYKAR require both IN and BIAS supplies to be present simultaneously?

No - the TPS7A11105PYKAR incorporates a global UVLO that independently monitors IN and BIAS rails. Regulation begins only when both voltages exceed their respective thresholds (≥675 mV on IN, ≥1.54 V on BIAS). If one rail is absent or below threshold, the device remains disabled. This behavior is confirmed in Figure 7-1 and Section 7.3.1.1 of the TPS7A11105PYKAR datasheet.

Can the TPS7A11105PYKAR be used without connecting the EN pin?

Yes - the EN pin can be tied directly to the IN or BIAS rail if enable functionality is not required. However, TI specifies that connecting EN to IN is only acceptable when VIN > 0.9 V. For robustness in low-VIN scenarios, tying EN to BIAS (≥1.7 V) is preferred. This configuration is documented in Table 5-2 and Section 7.3.3 of the official TPS7A11105PYKAR datasheet.

What is the maximum output capacitance supported by the TPS7A11105PYKAR?

The TPS7A11105PYKAR supports output capacitors from 2.2 µF to 22 µF, provided the capacitor's ESR remains below 250 mΩ. Larger values improve transient response but may increase start-up time and risk instability if ESR is too low. TI validates stability with 2.2-µF and 22-µF X7R ceramics in SBVS316B Section 6.3 and Figure 8-3 - confirming compatibility with standard MLCCs used in portable designs.

Is the active discharge feature of the TPS7A11105PYKAR enabled by default?

Yes - the active discharge circuit in the TPS7A11105PYKAR is integrated and automatically activated whenever the device is disabled (EN < 0.4 V) or enters thermal shutdown. It uses an internal 120-Ω pulldown resistor connected to GND, as specified in Section 7.3.2 and electrical table parameter RPULLDOWN. No external components or configuration bits are needed to enable this function on the TPS7A11105PYKAR.