Texas Instruments TPS62693YFDR

Overview

TPS62693YFDR from Texas Instruments is a 3-MHz synchronous step-down DC-DC converter optimized for single-cell Li-ion battery-powered portable electronics. It delivers 2.85 V at up to 800 mA, achieves 95% peak efficiency, maintains ±2% DC output voltage accuracy, and operates with 21 µA quiescent current in power-save mode - enabling extended battery life in smartphones and memory cards.

For engineers reviewing the TPS62693YFDR datasheet, TPS62693YFDR pinout, TPS62693YFDR application, or TPS62693YFDR equivalent, key selection criteria include its spread-spectrum PWM dithering for EMI reduction, 6-pin NanoFree™ CSP package, automatic PFM/PWM mode transition, and support for ultra-compact <12 mm² total solution size with only three external components.

Technical Context

The TPS62693YFDR employs a frequency-locked ring oscillator architecture that eliminates traditional compensation loops, delivering instantaneous load/line transient response without requiring external stability components. Its non-linear control scheme enables stable operation across wide ranges of inductor (0.5–1.8 µH) and output capacitance (1–10 µF), while maintaining regulated 3 MHz switching frequency under most conditions.

It integrates active power-down sequencing with internal discharge resistor (120 Ω), supports both auto PFM/PWM mode switching (via MODE = LOW) and forced PWM with spread-spectrum dithering (MODE = HIGH), and features integrated soft-start (350 µs), undervoltage lockout (2.1 V), and thermal shutdown (140 °C) with 10 °C hysteresis.

Key Specifications

Pinout & Package

TPS62693YFDR uses a 6-pin NanoFree™ (CSP) package with 0.4 mm pitch and 1.2 mm × 0.8 mm body size. The die-side-up construction places all terminals on the bottom surface in a 2×3 array.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62692YFDR and TPS62694YFDR, the TPS62693YFDR provides optimal voltage alignment for 2.85 V LDO-replacement applications in baseband processors and RF transceivers, balancing headroom and efficiency without requiring PCB redesign.

Availability

TPS62693YFDR is available at Aetrix Electronics and suitable for smartphone power management, BLE peripheral design, and mobile camera module development requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for TPS62693YFDR 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 for portable electronics.

The TPS6269x product line was designed specifically for ultra-thin, battery-powered mobile devices requiring sub-1-mm component height, minimal external parts count, and best-in-class light-load efficiency - targeting smartphones, wearables, and wireless sensor nodes.

FAQ

What is the recommended inductor value for TPS62693YFDR in a typical smartphone application?

The TPS62693YFDR datasheet specifies an inductance range of 0.5 µH to 1.8 µH. For optimal balance of size, efficiency, and transient response in smartphone designs, TI recommends the TOKO MDT2012CR1R0 (1.0 µH, 2012 case, 0.8 mm height). This value ensures stable operation across 2.3–4.8 V input and 0–800 mA load while maintaining the 3 MHz switching frequency and supporting the <12 mm² total solution size requirement of the TPS62693YFDR.

Does TPS62693YFDR require external feedback resistors to set the output voltage?

No, the TPS62693YFDR does not require external feedback resistors. It is a fixed-output converter with an internally trimmed 2.85 V regulation point. The FB pin connects directly to the output capacitor node to complete the feedback loop, and the internal voltage divider (450 kΩ) is factory-calibrated to deliver ±2% DC accuracy across temperature and load. This eliminates resistor placement, routing, and tolerance errors - critical for space-constrained mobile PCB layouts.

How does the MODE pin affect EMI performance in TPS62693YFDR?

When the MODE pin is pulled HIGH, the TPS62693YFDR forces fixed-frequency PWM operation with ±10% spread-spectrum dithering, reducing peak conducted and radiated EMI by >10 dB compared to standard PWM. When MODE is LOW, the device automatically switches between PFM (light load) and PWM (heavy load), minimizing average quiescent current but producing narrowband harmonics. Thus, MODE = HIGH is preferred for noise-sensitive RF sections like cellular transceivers, while MODE = LOW maximizes battery life in background tasks.

What thermal derating applies to TPS62693YFDR at 800 mA continuous load?

At 800 mA continuous output current with VIN = 3.6 V and TA = 85 °C, the TPS62693YFDR junction temperature rises approximately 106 °C above ambient (calculated using θJA = 132.5 °C/W and PD ≈ 0.8 W), reaching ~191 °C - exceeding the 150 °C absolute maximum. Therefore, derating is required: at 85 °C ambient, max continuous load is ~550 mA. For full 800 mA operation, ambient must be ≤60 °C or PCB copper area/thermal vias must be increased to reduce effective θJA below 90 °C/W per TI's thermal guidelines.

Can TPS62693YFDR replace an LDO in a noise-sensitive analog rail?

Yes, the TPS62693YFDR is explicitly positioned as an LDO replacement in TI's documentation. With ≥40 dB PSRR from 1–10 kHz, <25 mVPP output ripple in PFM mode, and spread-spectrum PWM capability, it delivers superior power conversion efficiency versus LDOs while meeting noise requirements of analog/RF rails. Its 350 µs soft-start and seamless PFM/PWM transition prevent supply glitches during state changes - making it suitable for powering ADC references, PLL VCOs, or RF synthesizers previously served by inefficient LDOs.