Texas Instruments TPS62700YZFR

Overview

TPS62700YZFR from Texas Instruments is a 2 MHz, 650 mA synchronous step-down DC-DC converter in an 8-pin WCSP package, optimized for RF power amplifier supply. It supports 2.5–6.0 V input, delivers 1.3–3.09 V output via dynamic analog voltage control (VCON), and achieves up to 95% efficiency at 400 mA with 3.09 V output - enabling precise RF output power tuning in battery-powered handsets.

For engineers reviewing the TPS62700YZFR datasheet, TPS62700YZFR pinout, TPS62700YZFR application, or TPS62700YZFR equivalent, key selection criteria include its 2.0-MHz fixed-frequency PWM operation minimizing RF interference, fast 20 µs VOUT settling time across 1.3–3.09 V, integrated overload/thermal/UVLO protection, and WCSP-8 footprint compatibility with space-constrained mobile RF front-end designs.

Technical Context

The TPS62700YZFR employs voltage-mode PWM control with a 2.0-MHz oscillator and internal gain of 2.5 between VCON and VOUT, enabling real-time RF-PA bias adjustment. Its dual MOSFET power stage features 100–270 mΩ high-side and 180–430 mΩ low-side R_DS(ON) over temperature, supporting up to 650 mA continuous output with 935–1200 mA current limiting.

It operates in 100% duty-cycle low-dropout mode near V_IN ≈ V_OUT, extending battery life in Li-ion systems. The device integrates soft-start (190–300 µs), fast transient response (<50 mVpk load/line transients), and separate analog (AGND) and power (PGND) ground pins to maintain regulation accuracy under RF switching noise.

Key Specifications

Pinout & Package

TPS62700YZFR uses an 8-pin Wafer Chip Scale Package (WCSP), measuring 1.5 mm × 1.5 mm with 0.5 mm pitch and bottom-solder ball termination. The package supports high-density RF layout with minimal parasitic inductance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF power amplifier supply applications.

Compared with TPS62701YZFR, TPS62700YZFR omits clock dithering but matches all core regulation, efficiency, and settling performance - making it optimal for cost-sensitive RF PA supplies where dithering isn't mandated. Against TPS62825YKAR, TPS62700YZFR provides unique analog VCON control in a smaller WCSP package but lower current rating.

Availability

TPS62700YZFR is available at Aetrix Electronics and suitable for cellular handset design, battery-powered IoT transmitter development, and portable medical wireless sensor production requiring stable component supply with guaranteed long-term availability.

Supply support for TPS62700YZFR 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 digital signal technologies with broad industrial, automotive, and communications product portfolios.

The TPS6270x family was designed specifically for RF power amplifier dynamic voltage scaling in space-constrained mobile devices, emphasizing ultra-small WCSP packaging, fast transient response, and analog-controlled output flexibility.

FAQ

What is the minimum input voltage required for TPS62700YZFR to regulate 3.09 V output at 650 mA?

The minimum input voltage depends on load current, inductor DCR, and MOSFET R_DS(ON). Using the datasheet equation V_IN(MIN) = V_OUT(MAX) + I_OUT(MAX) × (R_L + R_{DS(ON)_MAX}), with V_OUT = 3.09 V, I_OUT = 650 mA, R_L = 70 mΩ, and R_{DS(ON)_MAX} = 270 mΩ (high-side, –40°C to 85°C), V_IN(MIN) ≈ 3.33 V. Thus, TPS62700YZFR requires ≥3.33 V input to sustain 3.09 V/650 mA regulation.

Can TPS62700YZFR operate with VCON grounded or tied to AVIN for fixed-output operation?

Yes. When VCON is grounded (0 V), TPS62700YZFR regulates to its minimum output voltage of 1.3 V. When VCON is tied to AVIN (e.g., 3.6 V), the internal clamp limits VCON to ≤1.24 V, resulting in VOUT ≈ 3.09 V - the maximum regulated output. This allows fixed-output use without external DAC, though VCON must still be terminated per datasheet guidelines.

How does the separate AGND and PGND routing affect TPS62700YZFR performance?

Separating AGND (analog ground) and PGND (power ground) prevents high di/dt switching currents from injecting noise into the feedback and control circuitry. Routing AGND directly to the FB and VCON pins while connecting PGND to the SW and inductor return path ensures <1% output voltage error and stable regulation under RF switching loads - critical for maintaining PA linearity and ACLR performance.

What external components are mandatory for basic TPS62700YZFR operation?

Three components are mandatory: a 10 µF input capacitor (X5R/X7R, 0603) between PVIN and PGND; a 3.3 µH shielded inductor (DCR ≤100 mΩ) between SW and VOUT; and a 4.7 µF output capacitor (X5R/X7R, 0603) between VOUT and PGND. The FB pin must connect directly to the output capacitor's PGND side, and AGND must be shorted to PGND at a single point near the IC.

Does TPS62700YZFR support forced PWM mode or automatic PFM/PWM transition?

TPS62700YZFR operates exclusively in fixed-frequency PWM mode across the entire load range - no PFM mode or frequency folding. This eliminates audible noise and ensures consistent EMI profile, but results in higher light-load quiescent current (0.1–0.3 mA) compared to PFM-capable converters. The 2.0-MHz PWM operation is inherent to the device architecture and cannot be disabled or altered.