Texas Instruments TPS62175DQCT

Overview

TPS62175DQCT from Texas Instruments is an adjustable-output, 0.5-A synchronous step-down DC/DC converter in a 2-mm × 3-mm WSON-10 package, featuring DCS-Control™ topology, 4.75–28 V input range, 1–6 V output range, and 1 MHz nominal switching frequency. It delivers high efficiency across load range via seamless PWM-to-power-save mode transition and supports ultra-low-power systems via dedicated sleep mode (4.8 µA IQ).

For engineers reviewing the TPS62175DQCT datasheet, TPS62175DQCT pinout, TPS62175DQCT application, or TPS62175DQCT equivalent, key selection criteria include its adjustable feedback architecture, active output discharge, power good signal with open-drain output, and thermal/UVLO protection - all critical for battery-powered microcontroller supply rails and industrial point-of-load designs.

Technical Context

The TPS62175DQCT implements DCS-Control™, combining voltage-mode feedback with direct output-voltage sensing to achieve fast transient response and stable regulation using small ceramic capacitors. Its control loop maintains constant switching frequency in PWM mode and reduces frequency linearly in power save mode without output disturbance.

It integrates dual MOSFETs (850 mΩ high-side, 320 mΩ low-side), internal 0.8-V reference, soft-start (10 mV/µs ramp), and 100% duty-cycle operation for minimal VIN–VOUT dropout. Sleep mode disables switching while retaining regulation via fixed on-time pulses, enabling sub-mA load support with 4.8 µA quiescent current.

Key Specifications

Pinout & Package

TPS62175DQCT uses a 2-mm × 3-mm, 10-pin WSON package with exposed thermal pad soldered to AGND/PGND for thermal and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62175DQCT, TPS62177DQCT offers identical performance with reduced external component count for 3.3-V use cases, while TPS62840DLCR provides orders-of-magnitude lower quiescent current at the expense of input voltage range and cost - making TPS62175DQCT optimal for general-purpose 1–6 V, 4.75–28 V industrial and battery-fed applications.

Availability

TPS62175DQCT is available at Aetrix Electronics and suitable for industrial sensor nodes, ultra-low-power MCU supplies, 12 V point-of-load converters, embedded PC power rails, and battery-powered portable electronics requiring stable component supply and long-term manufacturability.

Supply support for TPS62175DQCT 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 delivering analog and embedded processing solutions, with decades of expertise in power management ICs and high-reliability industrial components.

The TPS6217x product line was designed specifically for space-constrained, battery-sensitive applications requiring high light-load efficiency, seamless mode transitions, and robust protection - targeting portable instrumentation, IoT edge nodes, and industrial automation.

FAQ

What is the minimum input voltage required for TPS62175DQCT to maintain regulation at 3.3 V output?

The minimum input voltage depends on load current and component losses. Using the datasheet equation, VIN(min) ≈ VOUT + IOUT × (RDS(on_HS) + RL). With typical 850 mΩ high-side FET resistance and a 10 µH inductor (DCR ≈ 30 mΩ), TPS62175DQCT sustains 3.3 V regulation down to ~3.8 V at 500 mA. Below that, it enters 100% duty cycle mode until dropout occurs.

Can TPS62175DQCT operate with a 2.2 µF input capacitor and 22 µF output capacitor as shown in the typical application?

Yes - the TPS62175DQCT is explicitly characterized and validated with a 2.2 µF X5R 0805 input capacitor and 22 µF X5R 0805 output capacitor. These values ensure stable DCS-Control™ loop operation, adequate ripple suppression, and EMI compliance. Larger capacitance improves hold-up time but is not required for basic functionality.

How does the SLEEP pin function in TPS62175DQCT, and what happens if left unconnected?

The SLEEP pin is active-low and internally pulled down to AGND via a resistor, so leaving it unconnected defaults TPS62175DQCT to sleep mode (4.8 µA IQ). To enable normal operation, drive SLEEP high (≥0.9×VIN) - but never exceed 7 V. If interfacing with a microcontroller GPIO that floats high-impedance during reset, add a 100-kΩ external pulldown to guarantee reliable startup.

Is TPS62175DQCT pin-compatible with TPS62177DQCT, and can they share the same PCB layout?

Yes - TPS62175DQCT and TPS62177DQCT share identical WSON-10 package dimensions, pinout, and footprint. They differ only in internal feedback configuration: TPS62175DQCT requires external FB resistors, while TPS62177DQCT fixes VOUT to 3.3 V. Layout reuse is fully supported; simply omit the FB divider for TPS62177DQCT or tie FB to AGND per TI guidance.

Does TPS62175DQCT provide reverse current blocking during shutdown or UVLO?

No - TPS62175DQCT does not integrate reverse current blocking. When EN is low or UVLO triggers, the high-side FET turns off but the low-side FET remains conductive during active discharge via VOS, allowing potential backfeed from the output capacitor into the input rail. For strict reverse-blocking requirements, an external Schottky diode or ideal diode controller must be added in series with VIN.