Texas Instruments TPS7A0312PYCHR

Overview

TPS7A0312PYCHR from Texas Instruments is an ultra-low-quiescent-current (200nA typ) 200mA low-dropout linear regulator with fixed 1.2V output, 1.5% accuracy over –40°C to +125°C, <10µs transient settling time, and stable operation with ≥1µF output capacitance. It serves as a primary power supply for battery-powered sensing nodes in smart meters and medical wearables.

For engineers reviewing the TPS7A0312PYCHR datasheet, TPS7A0312PYCHR pinout, TPS7A0312PYCHR application, or TPS7A0312PYCHR equivalent, this page delivers verified package mapping (YCH/DSBGA, 0.64mm × 0.64mm, 4-pin), confirmed smart-enable pulldown behavior (500kΩ typ), dropout voltage (310mV max at 200mA, VOUT = 3.3V), shutdown current (3nA typ), and thermal performance (RθJB = 67.3°C/W).

Technical Context

The TPS7A0312PYCHR implements a nanopower LDO architecture optimized for ultra-long battery life in intermittent-load applications. Its internal smart enable circuit integrates a temperature-stable pulldown resistor (500kΩ typ at 25°C) that ensures reliable disable state when EN floats, eliminating external pull-down components.

It maintains 200nA quiescent current across full input range (1.5V–6.0V) and even in dropout, while delivering fast transient response (<10µs, 80mV undershoot) via high-gain error amplifier and optimized internal compensation - requiring no external compensation network due to inherent stability with 1µF ceramic output capacitors.

Key Specifications

Pinout & Package

TPS7A0312PYCHR uses the YCH package: 4-pin DSBGA, 0.637mm × 0.637mm, 0.35mm pitch, bottom-side thermal pad internally connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0312PYCHR, TPS7A0212PYCHR offers deeper nanopower savings but less current headroom, while MCP1703T-1202E/MB trades significant IQ penalty for broader distributor availability and legacy design compatibility - neither is pin-compatible, requiring layout revision.

Availability

TPS7A0312PYCHR is available at Aetrix Electronics and suitable for gas meters, wearable medical monitors, residential circuit breakers, smoke detectors, and smart thermostats requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS7A0312PYCHR 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 connectivity technologies, with decades of LDO design expertise and automotive-grade reliability validation.

The TPS7A03 family was engineered specifically for ultra-low-power, battery-constrained applications such as utility meters and portable diagnostics - prioritizing nanoscale IQ, thermal resilience, and minimal external component count.

FAQ

What is the maximum output current capability of the TPS7A0312PYCHR?

The TPS7A0312PYCHR delivers up to 200mA continuous output current while maintaining regulation and specified accuracy. Its current limit is internally set at 240–750mA depending on output voltage and input conditions, providing robust short-circuit protection without external foldback circuitry. This makes the TPS7A0312PYCHR suitable for driving mixed-signal SoCs and multiple low-power peripherals simultaneously.

Does the TPS7A0312PYCHR require an external pull-down resistor on the EN pin?

No - the TPS7A0312PYCHR features an integrated smart enable pulldown resistor (500kΩ typical at 25°C) that actively disables the device when EN is left floating. This eliminates the need for an external resistor, saves PCB space, and reduces standby current by avoiding leakage through discrete pull-down networks. The internal pulldown disconnects automatically when EN is driven high, minimizing enable-state current draw.

Can the TPS7A0312PYCHR operate with a 1µF output capacitor?

Yes - the TPS7A0312PYCHR is explicitly designed to be stable with a minimum 1µF ceramic output capacitor, as confirmed in TI's SBVS375D datasheet Section 5.3 and Figure 5-51–5-53. Using ≥1µF X7R/X5R 0402 or 0201 ceramics ensures phase margin >60°, eliminates need for ESR-tuned capacitors, and supports ultra-compact layouts required in wearables and smart meters.

What is the dropout voltage of the TPS7A0312PYCHR at full load?

At 200mA output current and VOUT = 3.3V, the TPS7A0312PYCHR has a maximum dropout voltage of 270mV (typical 220mV). For its configured 1.2V output, dropout is 310mV max at 200mA and –40°C to +125°C. This allows operation from as low as 1.51V input - critical for extending runtime in aging primary batteries and energy-harvesting systems.

Is the TPS7A0312PYCHR qualified for industrial temperature operation?

Yes - the TPS7A0312PYCHR is fully specified and tested over TJ = –40°C to +125°C, with electrical characteristics (accuracy, dropout, IQ) guaranteed across this range. It includes thermal shutdown (170°C) and hysteresis reset (145°C), making it suitable for deployment in unventilated enclosures such as smart meters, HVAC controllers, and building security sensors.