Texas Instruments TPS63710DRRR

Overview

TPS63710DRRR from Texas Instruments is a low-noise synchronous inverting buck converter generating regulated negative output voltages from +3.1 V to +14 V input. It delivers up to 1 A output current, achieves up to 91% efficiency at -1.8 V output, maintains ±1.5% output voltage accuracy, and features 22 µV_RMS (10 Hz–100 kHz) noise performance - enabling use in high-precision ADC/DAC biasing and optical laser diode supplies.

For engineers reviewing the TPS63710DRRR datasheet, TPS63710DRRR pinout, TPS63710DRRR application, or TPS63710DRRR equivalent, key selection criteria include its fixed 1.5-MHz PWM operation, -1 V to -5.5 V programmable output range, 3-mm × 3-mm WSON-12 package with exposed thermal pad, and integrated low-1/f-noise reference architecture requiring external CAP and CCP filtering.

Technical Context

The TPS63710DRRR implements an inverting buck topology with synchronous rectification, using a fixed-frequency PWM controller and internal current sensing on the low-side switch (LSD). Its duty cycle is constrained to ≤70% to ensure adequate CCP capacitor charging during off-time, limiting |V_OUT| to less than 0.7 × V_IN.

It integrates a low-noise bandgap reference (VBG), gain stage (gain = 1/0.9), and external RC filter on the CAP pin to suppress 1/f noise below ~100 kHz. The VAUX pin supplies internal circuitry and supports ≤100 µA external load, while PG provides open-drain power-good signaling with 10-µs de-glitch timing.

Key Specifications

Pinout & Package

TPS63710DRRR uses a 12-pin 3-mm × 3-mm WSON package with exposed thermal pad soldered to GND for optimal thermal performance (R_θJB = 18.9 °C/W). Pin numbering follows top-view orientation with pin 1 at top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar inverting buck converter applications.

Compared with TPS63710DRRR, the DRRT offers identical performance in tape-and-reel form for volume manufacturing, while the LM27762DSGR trades inductor-free simplicity for significantly lower output current capability and higher noise - making it unsuitable as a functional replacement in precision or high-power negative rail designs.

Availability

TPS63710DRRR is available at Aetrix Electronics and suitable for telecom infrastructure, optical module design, and high-precision analog systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TPS63710DRRR 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-reliability power conversion ICs.

The TPS63710 product line was designed specifically for noise-sensitive applications requiring high-efficiency, programmable negative voltage generation in space-constrained environments - targeting telecom, test equipment, and precision instrumentation markets.

FAQ

What is the minimum input voltage required for TPS63710DRRR to regulate -1.8 V output?

The TPS63710DRRR requires a minimum input voltage of 4.5 V to regulate -1.8 V output while maintaining ≤70% duty cycle and full 1-A capability. This is derived from the |V_OUT| < 0.7 × V_IN constraint - 1.8 V ÷ 0.7 ≈ 2.57 V - but practical startup and regulation margins raise the validated minimum to 4.5 V per TI's typical application circuit and Figure 37 in the datasheet. Below this, output current derating occurs.

Can TPS63710DRRR generate -5.5 V output from a 9 V input?

No - TPS63710DRRR cannot reliably generate -5.5 V from 9 V input. The datasheet specifies |V_OUT| < 0.7 × V_IN for stable operation. At 9 V input, maximum supported |V_OUT| is 6.3 V, but thermal and current-limit constraints reduce practical capability. Figure 39 shows -5.5 V is only supported at V_IN ≥ 12 V with significant current derating. Attempting -5.5 V at 9 V risks instability, excessive duty cycle, and thermal shutdown.

How does the CAP pin capacitor affect TPS63710DRRR performance?

The CAP pin capacitor directly sets both soft-start ramp time and 1/f noise suppression bandwidth. A 47-nF capacitor yields ~1 ms ramp time (per Equation 2), while its RC time constant with the internal 100-kΩ resistor defines the low-frequency noise corner - e.g., 47 nF gives ~34 Hz corner. Larger values extend ramp time and lower the corner frequency, improving noise rejection but increasing startup delay. Layout must keep CAP traces short and away from noisy nodes to preserve low-noise integrity.

Is TPS63710DRRR pin-compatible with any other Texas Instruments inverting converters?

No - TPS63710DRRR is not pin-compatible with other TI inverting converters such as the LM2776x series or TPS6040x family. Its 12-pin WSON layout, unique pin functions (e.g., VAUX, CP, CAP), and inverting buck architecture differ fundamentally from charge-pump or flyback-based alternatives. Substitution requires complete schematic and layout revision. Only the TPS63710DRRT shares identical pinout and functionality as a packaging variant.

What is the role of the CCP capacitor in TPS63710DRRR operation?

The CCP capacitor (connected between CP and SW pins) enables the inverting buck operation by storing charge during the off-time and inverting the input voltage onto the SW node during on-time. Its value (4–20 µF) determines maximum achievable output current at given V_IN/V_OUT ratios - undersized CCP causes duty cycle violation and current limiting. It must be rated for ≥V_IN, placed adjacent to CP/SW pins, and selected for low ESR to sustain 50-mA precharge current during startup.