Texas Instruments TPS62770YFPT

Overview

TPS62770 from Texas Instruments is an ultra-low-power multi-rail DC/DC converter integrating a 370 nA quiescent current step-down regulator (1.0–3.0 V, 300 mA), a slew-rate-controlled load switch, and a dual-mode step-up converter (12 V fixed or up to 15 V adjustable, 30 mA). It targets wearable systems requiring simultaneous low-voltage MCU core supply and high-voltage PMOLED bias.

For engineers reviewing the TPS62770 datasheet, TPS62770 pinout, TPS62770 application, or TPS62770 equivalent, this device delivers verified sub-μA I_Q, dynamic VSEL-based output voltage scaling, integrated load disconnect, and PWM-to-current conversion for LED drive - all in a 1.58 × 1.58 mm WCSP package.

Technical Context

The TPS62770 implements TI's DCS-Control™ topology for the step-down converter, enabling seamless PFM/PWM transition, <2.5% output voltage accuracy, and 225 ns minimum on-time for stable light-load regulation. Its step-up stage uses an internal 0.8 V reference (voltage mode) or 200 mV reference (current mode), with BM pin selection locking the operating mode before enable.

Three independent power domains are isolated: GND1 supports the 370 nA step-down regulator and load switch; GND2 serves the step-up converter; and FB, EN2/PWM, and BM pins jointly configure constant-voltage or constant-current operation with overvoltage protection (17.7 V) and load disconnect functionality.

Key Specifications

Pinout & Package

TPS62770 uses a 16-pin wafer-chip-scale package (DSBGA, YFP) with 0.4 mm pitch and 1.58 mm × 1.58 mm body size. Thermal resistance R_θJA = 90.6 °C/W supports operation up to 85°C ambient in compact wearable enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail power management applications.

Compared with TPS62770, TPS62740DSSR omits critical dual-rail functionality, while MAX77650 trades ultra-low I_Q and pin-strapped flexibility for digital configurability - making TPS62770 uniquely suited for cost- and size-constrained wearables needing hardware-defined, zero-software power rails.

Availability

TPS62770 is available at Aetrix Electronics and suitable for wearable electronics, fitness accessories, and health monitoring devices requiring stable component supply across long product lifecycles and low-volume production ramps.

Supply support for TPS62770 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TPS62770 belongs to TI's ultra-low-power DC/DC converter product line, engineered specifically for battery-operated wearables where micropower efficiency, miniature packaging, and multi-rail integration reduce bill-of-materials and board space.

FAQ

What is the minimum input voltage required for TPS62770 to regulate its 1.8 V step-down output?

The TPS62770 enters auto 100% duty-cycle mode when VIN falls within 85–310 mV above VO1 (depending on temperature), allowing regulation down to ~1.9 V input. Below 1.9 V, undervoltage lockout (UVLO) disables the device. For reliable 1.8 V operation, VIN must remain ≥2.1 V (typical UVLO turn-on threshold).

Can TPS62770 simultaneously power a 1.8 V MCU and a 12 V PMOLED display?

Yes. The TPS62770 integrates independent step-down (VO1) and step-up (VO2) regulators. With VSEL1–VSEL3 set for 1.8 V and FB tied to VIN, it delivers regulated 1.8 V at up to 300 mA and fixed 12 V at up to 30 mA concurrently - verified in TI's SLVSCX0B datasheet Figure 18 typical application schematic.

How does the load switch in TPS62770 prevent output voltage droop during subsystem turn-on?

The TPS62770 load switch features slew-rate control on the CTRL pin: V_LOAD rises in 315–800 μs (depending on load), limiting di/dt and preventing sudden current demand from disturbing the VO1 rail. This ensures stable MCU operation during peripheral activation without requiring additional bulk capacitance.

What happens to the VO1 and LOAD outputs when TPS62770 is disabled?

When EN1 = low, the TPS62770 activates internal discharge switches on both VO1 and LOAD pins, pulling them to GND. When CTRL = low (with EN1 high), only LOAD is discharged. This eliminates residual charge that could cause latch-up or improper reset in downstream circuitry - a key requirement for medical-grade wearables.

Is TPS62770 suitable for driving LEDs with PWM brightness control?

Yes. With BM = high, the TPS62770 operates in constant-current mode; applying a PWM signal to EN2/PWM scales the 200 mV reference proportionally (e.g., 50% duty cycle → 100 mV effective reference). This enables precise analog current control without external DAC or op-amp circuitry - confirmed in Section 7.3.2.7 of the SLVSCX0B datasheet.