Texas Instruments TPS61027DRCR

Overview

TPS61027DRCR from Texas Instruments is a synchronous boost DC-DC converter optimized for single-cell Li-ion, alkaline, or NiMH battery-powered systems. It delivers up to 200 mA at 5 V output from inputs as low as 0.9 V, maintains regulation during input voltage crossover (e.g., 3.6 V in → 3.3 V out), and integrates a low-battery comparator with programmable threshold. It is used in portable medical devices requiring stable 5-V rail generation under deep discharge.

For engineers reviewing the TPS61027DRCR datasheet, TPS61027DRCR pinout, TPS61027DRCR application, or TPS61027DRCR equivalent, key selection criteria include fixed 5-V output, 1500-mA switch current limit, 25-µA quiescent current, down-regulation capability, and VSON-10 thermal performance - all critical for compact, battery-life-sensitive designs.

Technical Context

The TPS61027DRCR implements a fixed-frequency PWM controller with synchronous rectification using integrated N- and P-channel MOSFETs, achieving up to 96% efficiency. Its multiple feed-forward control monitors VBAT, VOUT, and NMOS switch voltage drop to directly adjust duty cycle without relying solely on error amplifier loop dynamics.

It supports true down-regulation mode when VBAT ≥ VOUT (e.g., 4.2 V Li-ion → 3.3 V output), where the PMOS rectifier operates in linear mode to regulate; this mode activates automatically above VOUT + 50 mV and deactivates below it. Power Save Mode is enabled via PS pin low and remains active in down-regulation regardless of PS state.

Key Specifications

Pinout & Package

TPS61027DRCR uses a thermally enhanced 3-mm × 3-mm VSON-10 package with exposed PowerPAD™ soldered to PGND for optimal thermal dissipation (R_θJA = 47.2°C/W). The 10-pin layout separates power and signal grounds (PGND/GND) to minimize noise coupling into control circuitry.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61025DRCR and TPS61026DRCR, the TPS61027DRCR uniquely balances 5-V output, 200-mA continuous capability, and ultra-low quiescent current - making it optimal for space-constrained, battery-critical 5-V applications where 1500-mA headroom suffices and 1800-mA rating is unnecessary overhead.

Availability

TPS61027DRCR is available at Aetrix Electronics and suitable for portable medical monitors, handheld barcode scanners, and smart sensor nodes requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for TPS61027DRCR 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 over 50 years of innovation in energy-efficient power conversion.

The TPS6102x family was designed specifically for ultra-low-voltage battery-powered applications - delivering high-efficiency boost conversion from 0.9 V input while integrating protection, monitoring, and thermal management in miniature packages.

FAQ

What is the output voltage setting of the TPS61027DRCR?

The TPS61027DRCR has a factory-programmed fixed 5-V output. Unlike adjustable variants (e.g., TPS61020), its feedback network is internal - FB pin is not connected externally and must remain unpopulated. Output regulation maintains ±3% total accuracy across input voltage, load, and temperature ranges per datasheet Section 8.5.

Does the TPS61027DRCR support input voltages higher than its output voltage?

Yes, the TPS61027DRCR supports down-regulation mode when VBAT ≥ VOUT. For example, with 5-V output, it regulates stably at VBAT = 5.5 V by operating the internal PMOS rectifier in linear mode. This mode activates automatically above VOUT + 50 mV and deactivates below that threshold, enabling single-rail solutions without external LDOs.

How is the low-battery detection configured on the TPS61027DRCR?

The TPS61027DRCR uses the LBI pin to sense battery voltage via an external resistor divider. With a fixed 500-mV internal comparator threshold and 10-mV hysteresis, a typical divider (e.g., 390-kΩ from VBAT to LBI, 200-kΩ from LBI to GND) sets cutoff at ~2.4 V. LBO provides open-drain active-low output requiring a 1-MΩ pull-up to host MCU interrupt line.

What thermal considerations apply to the TPS61027DRCR in continuous 200-mA operation?

At 200 mA output and 5 V, the TPS61027DRCR dissipates ~150 mW typical. With R_θJA = 47.2°C/W and 25°C ambient, junction temperature rises ~7°C - well within the 125°C max operating limit. Full thermal margin requires proper PowerPAD™ soldering to a ≥100-mm² PGND copper pour and separation of PGND/GND at a single point near Pin 5.

Can the TPS61027DRCR be forced into fixed-frequency operation at light loads?

Yes, via the PS pin: pulling PS to VBAT disables Power Save Mode and forces fixed 480–720 kHz switching. However, this is ineffective in down-regulation mode (VBAT ≥ VOUT), where Power Save Mode remains active regardless of PS state. For light-load efficiency optimization in standard boost mode, PS should be grounded.