Texas Instruments TPS62736RGYT

Overview

TPS62736RGYT from Texas Instruments is an ultra-low-power synchronous buck converter optimized for 50-mA output current, featuring >90% efficiency at 15 µA load, 380-nA quiescent current in active mode, and resistor-programmable output voltage (1.3 V to VIN – 0.2 V) - deployed in energy harvesting systems powering wireless sensor nodes with intermittent input sources like TEGs or solar cells.

For engineers reviewing the TPS62736RGYT datasheet, TPS62736RGYT pinout, TPS62736RGYT application, or TPS62736RGYT equivalent, key selection criteria include its ship-mode 10-nA shutdown current, dual enable control (EN1/EN2) for hierarchical power states, VIN_OK programmable input power-good indication, and 14-pin VQFN (3.5 mm × 3.5 mm) package with thermal pad for low-thermal-resistance operation in space-constrained ultra-low-power designs.

Technical Context

The TPS62736RGYT implements a time-sampled hysteretic control architecture that minimizes average quiescent current across load ranges from 100 nA to 50 mA, enabling stable regulation without external compensation. Its integrated push-pull VIN_OK driver supports resistor-programmable threshold (2 V to 5.5 V) with ±2% accuracy and 40-mV hysteresis.

It features two independent power-off states: ship mode (EN1 = high, 10-nA IQ) and standby mode (EN1 = EN2 = low, 340-nA IQ), plus active regulation (EN1 = low, EN2 = high). The device uses internal high-side (2.4 Ω typ) and low-side (1.1 Ω typ) MOSFETs, supports 100% duty cycle for ultra-low dropout, and operates across –40°C to +85°C ambient.

Key Specifications

Pinout & Package

VQFN-14 (RGY) package with 3.5 mm × 3.5 mm body size, 0.5-mm lead pitch, and exposed thermal pad connected to VSS. Designed for reflow-compatible assembly and low-inductance PCB layout with dedicated ground plane under thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power buck converter applications.

Compared with TPS62736RGYT, TPS62737RGYT delivers higher current at marginally lower IQ but trades off design flexibility in programmability and thermal profile, while MAX17050G+T replaces analog configurability with digital telemetry - making TPS62736RGYT optimal for minimalist, resistor-tuned, ultra-low-IQ systems where every nanoamp and PCB mm² matters.

Availability

TPS62736RGYT is available at Aetrix Electronics and suitable for energy harvesting nodes, solar-powered sensors, and alkaline-powered remotes requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for TPS62736RGYT 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 ICs, with decades of expertise in ultra-low-power design for industrial, automotive, and IoT applications.

The TPS6273x product line was engineered specifically for energy-constrained systems - delivering industry-leading light-load efficiency, nanoscale quiescent current, and programmable power-good signaling to enable maintenance-free, batteryless operation in next-generation sensing infrastructure.

FAQ

What is the minimum input voltage required for TPS62736RGYT to regulate output?

The TPS62736RGYT has an input UVLO threshold of 1.95 V (typical), below which the device disables regulation. However, stable regulation requires VIN ≥ VOUT + dropout voltage - e.g., for 1.8 V output, VIN must be ≥ ~1.83 V (with 30 mV dropout at 10 mA). Full functionality (including VIN_OK assertion) begins at 2 V per datasheet recommended conditions.

How does TPS62736RGYT achieve >90% efficiency at only 15 µA output current?

The TPS62736RGYT achieves >90% efficiency at 15 µA via its time-sampled hysteretic control architecture, which reduces switching frequency and gate-drive losses at ultralight loads, combined with ultra-low 380-nA quiescent current and optimized internal FET RDS(on) - minimizing both static and dynamic losses simultaneously.

Can TPS62736RGYT be used with a 1.3-V output setting, and what is the accuracy?

Yes, TPS62736RGYT supports 1.3 V as the minimum resistor-programmable output voltage. Output regulation accuracy is ±2% (excluding external resistor tolerance), verified across 1.3 V–3.3 V and 100 µA–50 mA load range - confirmed in Electrical Characteristics Table 8.5 of the SLVSBO4C datasheet.

What is the purpose of the VRDIV pin on TPS62736RGYT, and how should it be used?

The VRDIV pin provides a buffered 1.21-V internal reference (±0.5% over temperature) to bias the external resistor dividers for VOUT_SET and VIN_OK_SET. It must be connected directly to those dividers - no capacitors or series resistors - to ensure accurate threshold programming and avoid regulation drift or instability.

Does TPS62736RGYT support 100% duty cycle operation, and under what conditions?

Yes, TPS62736RGYT supports 100% duty cycle (pass-through mode) when VIN drops near VOUT. At 10 mA load and VOUT = 2.5 V, dropout is 24 mV (typical); at 100 mA, it rises to 30 mV. This enables continued regulation during deep discharge of input sources like supercapacitors or aging batteries.