Texas Instruments TPS61027DRCRSY

Overview

TPS61027DRCRSY 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 a 0.9–6.5 V input, features 96% peak efficiency, integrated low-battery comparator (LBI/LBO), and operates in down-regulation mode when input exceeds output voltage.

For engineers reviewing the TPS61027DRCRSY datasheet, TPS61027DRCRSY pinout, TPS61027DRCRSY application, or TPS61027DRCRSY equivalent, key selection criteria include fixed 5-V output, 1500-mA switch current limit, 480–720-kHz switching frequency, Power Save Mode enable/disable via PS pin, and thermal performance in the 3-mm × 3-mm VSON-10 package with PowerPAD™.

Technical Context

The TPS61027DRCRSY implements a fixed-frequency PWM controller with synchronous rectification using integrated N- and P-channel MOSFETs. Input voltage, output voltage, and NMOS switch voltage drop are fed forward directly to the regulator-bypassing slow error-amplifier loop dynamics-to enable rapid duty-cycle response across load and input transients.

It supports true down-regulation: when V_IN ≥ V_OUT, the PMOS rectifier operates as a linear pass element to maintain regulation, with automatic exit at ~50 mV below V_OUT. The device also integrates anti-ringing circuitry on the SW node and load disconnect during shutdown via backgate control of the high-side PMOS.

Key Specifications

Pinout & Package

TPS61027DRCRSY is housed in a thermally enhanced 3-mm × 3-mm VSON-10 package with exposed PowerPAD™ (pin 0) that must be soldered to PGND for optimal thermal dissipation and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61025DRCR and TPS61026DRCR, the TPS61027DRCRSY uniquely delivers fixed 5-V output with 1500-mA current capability-matching common USB-peripheral and white LED flash requirements without overdesigning thermal margin or sacrificing light-load efficiency.

Availability

TPS61027DRCRSY is available at Aetrix Electronics and suitable for portable medical sensors, wireless remote controls, handheld barcode scanners, and wearable fitness trackers requiring stable component supply across design-in, prototyping, and volume production phases.

Supply support for TPS61027DRCRSY 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 battery-operated and energy-efficient systems.

The TPS6102x family-including TPS61027DRCRSY-is designed specifically for ultra-low-voltage, high-efficiency boost conversion in space-constrained portable electronics, emphasizing deep-discharge support, integrated supervision, and thermal robustness.

FAQ

What is the output voltage of the TPS61027DRCRSY?

The TPS61027DRCRSY provides a fixed 5-V output voltage. This is internally programmed and does not require external feedback resistors. The FB pin is unused and should be left unconnected. Output regulation remains stable across the full 0.9–6.5-V input range and during down-regulation when input exceeds 5 V, as confirmed in the SLVS451G datasheet Section 6 and Table 6.

Does the TPS61027DRCRSY support operation below 1 V input?

Yes, the TPS61027DRCRSY supports start-up from as low as 0.9 V and continues operation down to 0.9 V after start-up. This enables full utilization of single-cell alkaline, NiMH, or NiCd batteries. The device incorporates undervoltage lockout that disables operation below ~0.8 V to prevent malfunction, as specified in Section 8.3 and 8.5 of the SLVS451G datasheet.

How does the low-battery detection work on the TPS61027DRCRSY?

The TPS61027DRCRSY uses the LBI pin to sense a scaled-down battery voltage via an external resistor divider, comparing it to an internal 500-mV threshold. When the divided voltage falls below this level, the open-drain LBO pin pulls low. The LBI pin has 10-mV hysteresis and must never be left floating-it should be tied to GND or VBAT if unused. Configuration details are in Section 10.5.2 of SLVS451G.

Can the TPS61027DRCRSY regulate output when input voltage exceeds 5 V?

Yes, the TPS61027DRCRSY supports down-regulation: when V_IN ≥ V_OUT, it actively controls the PMOS rectifier as a linear pass element to maintain 5-V regulation. Operation exits this mode automatically when V_IN drops ~50 mV below 5 V. Thermal design must account for increased losses in this mode, as described in Section 10.3.3 of SLVS451G.

What package type and thermal characteristics does the TPS61027DRCRSY have?

The TPS61027DRCRSY uses the VSON-10 (DRC) package: 3.0 mm × 3.0 mm body with exposed PowerPAD™ thermal pad. Its junction-to-ambient thermal resistance (R_θJA) is 47.2°C/W, and junction-to-board (R_θJB) is 21.6°C/W. The PowerPAD™ must be soldered and connected to PGND for effective heat dissipation, as documented in Section 8.4 and Mechanical Information of SLVS451G.