Texas Instruments TPS62000YZGT

Overview

TPS62000YZGT from Texas Instruments is an adjustable-output synchronous step-down DC-DC converter optimized for low-power portable systems powered by single-cell Li-ion or 2–3-cell alkaline/NiMH batteries. It delivers up to 600 mA output current, operates from 2 V to 5.5 V input, supports 0.8 V to VIN adjustable output, and achieves >95% efficiency at 3.6 V_IN/2.5 V_OUT/200 mA with 750 kHz fixed-frequency PWM or PFM/PWM hybrid mode.

For engineers reviewing the TPS62000YZGT datasheet, TPS62000YZGT pinout, TPS62000YZGT application, or TPS62000YZGT equivalent, key selection considerations include its 10-pin VSSOP package, pin-programmable current limit (600 mA/1.2 A), SYNC-controlled PFM/PWM mode selection, integrated antiringing switch (for fixed-output variants only), and 50 μA quiescent current in power-save mode.

Technical Context

The TPS62000YZGT employs current-mode control with internal slope compensation and a 750 kHz nominal oscillator frequency. Its synchronous rectification uses integrated P-channel high-side and N-channel low-side MOSFETs, enabling 100% duty-cycle operation near dropout and eliminating external diode losses.

It features dual-mode operation: forced PWM (SYNC = high) for noise-sensitive applications with fixed frequency, and automatic PFM/PWM transition (SYNC = low) to maintain high efficiency down to light loads. The internal error amplifier references a stable 0.45 V bandgap, and soft-start (≈1 ms) prevents output overshoot during enable.

Key Specifications

Pinout & Package

TPS62000YZGT is housed in a 10-pin VSSOP (DGS) package measuring 3.00 mm × 3.00 mm, optimized for high-density portable PCB layouts with thermal pad (PGND) on bottom.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62000YZGT, TPS62060DSGR offers higher density and current but sacrifices system-level monitoring and flexibility; MAX8640YETA+ simplifies BOM at the cost of configurability-TPS62000YZGT remains optimal for designs needing adjustable voltage, power-good status, and multi-mode efficiency optimization.

Availability

TPS62000YZGT is available at Aetrix Electronics and suitable for cellular phones, USB DSL modems, handheld PDAs, digital cameras, and MP3 players requiring stable component supply across long-lifecycle consumer electronics programs.

Supply support for TPS62000YZGT 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 high-efficiency DC-DC conversion for portable and industrial applications.

The TPS6200x product line was designed specifically for battery-powered portable electronics requiring high light-load efficiency, small solution size, and robust thermal performance in VSSOP packaging.

FAQ

What is the minimum input voltage required for TPS62000YZGT to regulate output?

The TPS62000YZGT specifies a minimum input voltage of 2 V under recommended operating conditions. However, it can operate down to approximately 1.8 V in practical applications-though undervoltage lockout (UVLO) activates below ~1.6 V, disabling regulation. For reliable operation across full battery discharge, design with VIN ≥2 V and verify start-up behavior at cold temperatures per the datasheet's –40°C to 85°C range. The TPS62000YZGT maintains regulation until VIN approaches VOUT plus dropout voltage, enabled by its 100% duty-cycle capability.

Can TPS62000YZGT be used with an output voltage lower than 0.8 V?

No, the TPS62000YZGT is not specified or guaranteed to operate below 0.8 V output. Its internal reference voltage is 0.45 V, and the feedback architecture requires VOUT = 0.45 V × (1 + R1/R2); achieving sub-0.8 V would demand impractically large resistor ratios that compromise noise immunity and stability. TI's datasheet explicitly defines the adjustable output range as 0.8 V to VIN. For sub-0.8 V requirements, consider purpose-built low-dropout regulators or newer buck controllers with extended reference ranges-TPS62000YZGT must be used within its validated 0.8 V minimum.

How does the ILIM pin affect current limiting in TPS62000YZGT?

The ILIM pin on the TPS62000YZGT selects between two factory-trimmed current-limit thresholds: tying ILIM to GND sets the switch current limit to typically 600 mA, while connecting it to VIN raises the limit to typically 1.2 A. This adjusts the peak inductor current threshold during PWM operation and determines the PFM-to-PWM transition point. The setting directly impacts maximum deliverable load current, thermal stress under overload, and inductor sizing-using the 1.2 A option requires verifying PCB copper area and thermal vias can dissipate the resulting power dissipation. The TPS62000YZGT does not provide overcurrent fault reporting; it relies on foldback or hiccup behavior inherent to current-mode control.

Is the antiringing switch active in TPS62000YZGT?

No, the antiringing switch is disabled in the TPS62000YZGT because it is the adjustable-output variant of the TPS6200x family. TI's datasheet explicitly states that the antiringing switch is implemented only in fixed-output versions (e.g., TPS62001–TPS62008) to suppress parasitic oscillations during discontinuous conduction mode. The TPS62000YZGT relies on standard synchronous rectification and external output capacitor selection (10 μF for VOUT ≥1.8 V, 47 μF for lower outputs) to manage EMI. This distinction is critical for noise-sensitive analog supplies where antiringing behavior could interfere with feedback stability-TPS62000YZGT avoids this by omitting the feature entirely.

What is the purpose of the FC pin on TPS62000YZGT, and how should it be decoupled?

The FC (Filter Capacitor) pin on the TPS62000YZGT is a dedicated high-frequency input bypass terminal-not a standard power pin-that must be decoupled with a 0.1 μF ceramic capacitor placed as close as possible to the pin. This capacitor stabilizes the internal bias circuitry and suppresses noise coupling from the noisy VIN rail into the control loop, directly impacting regulation accuracy and transient response. Unlike general-purpose input capacitors (CIN = 10 μF), the FC capacitor serves a unique noise-filtering role for the oscillator and reference circuits. Omitting or misplacing the FC capacitor risks increased output ripple, audible switching noise, or startup failure-making correct FC decoupling non-negotiable in every TPS62000YZGT design.