Texas Instruments TPS62090RGTT

Overview

TPS62090RGTT from Texas Instruments is a 3-A synchronous step-down DC-DC converter with DCS-Control™ topology, operating from 2.5 V to 6 V input and delivering adjustable output voltage (0.8 V to VIN) in a 3 mm × 3 mm QFN-16 package. It achieves up to 95% efficiency at 3 A load, features 2.8 MHz/1.4 MHz selectable switching frequency, 20 µA quiescent current in power save mode, and supports output voltage tracking and discharge.

For engineers reviewing the TPS62090RGTT datasheet, TPS62090RGTT pinout, TPS62090RGTT application, or TPS62090RGTT equivalent, key selection criteria include its DCS-Control™ transient response, dual-frequency flexibility, softstart programmability via SS pin, hiccup-mode short-circuit protection, and thermal performance with R_θJA = 47 °C/W.

Technical Context

The TPS62090RGTT implements DCS-Control™ - a hybrid regulation architecture combining hysteretic and voltage-mode control - enabling seamless PWM-to-power-save-mode transition without output disturbance. It uses an internal 0.8 V reference, supports external softstart timing via constant-current (7.5 µA) charging of the SS capacitor, and integrates charge pump circuitry (CP/CN pins) for high-side FET gate drive.

Its functional modes include full PWM operation at 2.8 MHz (FREQ = GND) or 1.4 MHz (FREQ = VIN), automatic entry into power save mode below discontinuous conduction threshold, and 100% duty cycle low-dropout operation. Output voltage accuracy is ±1.4% over load and temperature in PWM mode, with dedicated hiccup-mode current limiting (32-cycle lockout) and thermal shutdown at 150 °C.

Key Specifications

Pinout & Package

TPS62090RGTT is housed in a thermally enhanced 16-pin QFN package (3.00 mm × 3.00 mm, 0.4 mm pitch) with exposed thermal pad connected to AGND. The package supports reflow soldering and requires proper thermal vias under the pad for reliable operation at 3 A.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down converter applications.

Compared with TPS62093RGTT, the TPS62090RGTT offers design flexibility via adjustable output but requires two external resistors; compared with TPS62130ARGTR, it delivers superior light-load efficiency and advanced system integration features at the cost of narrower input range and higher pin count.

Availability

TPS62090RGTT is available at Aetrix Electronics and suitable for notebook computers, solid-state drives, and battery-powered IoT hubs requiring stable component supply, consistent parametric performance, and long-term production support.

Supply support for TPS62090RGTT 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 decades of expertise in high-efficiency DC-DC conversion.

The TPS6209x product line was designed specifically for space-constrained, battery-sensitive applications demanding high efficiency across full load range, fast transient response, and flexible power sequencing - targeting portable computing and storage systems.

FAQ

What is the recommended inductor value for TPS62090RGTT at 2.8 MHz operation?

The TPS62090RGTT datasheet specifies a 0.47 µH inductor for 2.8 MHz operation with 22 µF output capacitance. This value balances ripple current (≈30% of I_OUT), size, and efficiency. Using a 0.4 µH inductor - as shown in typical application schematics - is also validated and maintains stability with standard ceramic capacitors. Inductor DCR must be minimized to preserve efficiency at 3 A.

Does TPS62090RGTT support remote sensing, and how is it implemented?

Yes, TPS62090RGTT supports remote sensing via the VOS pin, which connects directly to the load-side output node. This compensates for IR drop across PCB traces and improves regulation accuracy under dynamic load conditions. The VOS pin also enables controlled output discharge (200 Ω path) during shutdown, ensuring predictable reset behavior in multi-rail systems.

How does the FREQ pin affect efficiency and component selection in TPS62090RGTT?

The FREQ pin selects between 2.8 MHz (higher efficiency at light loads, smaller L/C) and 1.4 MHz (higher peak efficiency at medium loads, lower switching loss). At 1.4 MHz, the on-time doubles, allowing use of larger inductors (e.g., 1 µH) to reduce ripple current and EMI, while maintaining same output capacitor size. Efficiency gains at 1.4 MHz are most pronounced above 500 mA.

Can TPS62090RGTT be used without connecting the CP and CN pins?

No - the CP and CN pins must be connected with a 10 nF capacitor rated for full input voltage. This capacitor forms the flying capacitor for the internal charge pump, which generates the gate drive voltage for the high-side MOSFET. Omitting it disables the high-side switch, preventing regulation and likely causing device failure or unregulated output.

What is the minimum softstart time for TPS62090RGTT when the SS pin is left floating?

When the SS pin is left floating, the TPS62090RGTT achieves a minimum softstart time of approximately 50 µs. This is due to internal leakage and parasitic capacitance forming a minimal RC time constant. For precise timing control or to avoid hiccup-mode triggering during startup with large output capacitors, an external SS capacitor (e.g., 10 nF → ~1.3 ms) is strongly recommended.