Texas Instruments TPS76701QPWP

Overview

TPS76701QPWP from Texas Instruments is an adjustable low-dropout linear regulator delivering 1 A output current with 230 mV dropout at 1 A (for 5-V output), 85 µA typical quiescent current, ±2% output voltage accuracy over line/load/temperature, and integrated open-drain power-on reset with 200-ms delay. It operates from 2.7 V to 10 V input and regulates output from 1.5 V to 5.5 V via external resistor divider, serving in battery-powered microcontroller power rails where fast transient response and ultra-low standby current are critical.

For engineers reviewing the TPS76701QPWP datasheet, TPS76701QPWP pinout, TPS76701QPWP application, or TPS76701QPWP equivalent, key selection considerations include its PMOS pass element enabling load-independent quiescent current, stability with 10 µF low-ESR output capacitors, thermal shutdown at 150°C, and RESET assertion when output falls to 92–98% of nominal - all validated for automotive-grade (-40°C to 125°C) operation in the 20-pin HTSSOP PowerPAD™ package.

Technical Context

The TPS76701QPWP employs a PMOS pass transistor architecture, eliminating base-drive current dependency and ensuring quiescent current remains stable (85 µA typ) across 0–1 A load range. Its internal 1.1834 V reference feeds a high-impedance feedback amplifier connected to the FB pin, enabling precise output programming via external R1/R2 divider.

It integrates an undervoltage-monitoring comparator that drives the open-drain RESET output low when regulated output drops below 92–98% of nominal, with 200-ms delay. Protection includes foldback current limiting (~1.7 A peak), thermal shutdown at 150°C, and reverse-current conduction via the PMOS body diode - requiring external mitigation if sustained reverse bias is expected.

Key Specifications

Pinout & Package

TPS76701QPWP is housed in a 20-pin HTSSOP PowerPAD™ (PWP) package measuring 6.50 mm × 4.40 mm, featuring eight exposed GND/HSINK pins (1, 2, 9, 10, 11, 12, 19, 20) for enhanced thermal performance and low-inductance grounding.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable LDO regulator applications.

Compared with TPS76701QPWP, TPS7A4700RGWR trades integrated RESET and automotive qualification for superior noise/PSRR, while MCP1826T-ADJE/OT sacrifices thermal robustness and system-level supervision to reduce cost - making TPS76701QPWP optimal for safety-aware, thermally demanding, and reset-critical embedded designs.

Availability

TPS76701QPWP is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and portable medical device applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.

Supply support for TPS76701QPWP 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 connectivity technologies, with decades of expertise in power management IC design and automotive-grade reliability validation.

The TPS767xx family was engineered for high-reliability, low-power embedded systems - delivering fast transient response, ultra-low quiescent current, and integrated supervision in thermally enhanced packages for harsh-environment applications.

FAQ

What is the minimum input voltage required for TPS76701QPWP to maintain regulation at 3.3 V output?

The minimum input voltage for TPS76701QPWP to regulate 3.3 V output is determined by dropout voltage: at 1 A load and 25°C, dropout is 350 mV, so VI(min) = 3.3 V + 0.35 V = 3.65 V. At −40°C to 125°C, worst-case dropout rises to 575 mV, requiring VI ≥ 3.875 V. The TPS76701QPWP datasheet specifies VI must exceed VO + VDO across temperature and load - never drop below 2.7 V regardless of output setting.

How do I calculate the resistor values to set TPS76701QPWP to 2.5 V output?

To set TPS76701QPWP to 2.5 V, use the formula VO = VREF × (1 + R1/R2), where VREF = 1.1834 V. Select R2 = 30.1 kΩ for ~50-µA divider current, then solve R1 = R2 × (VO/VREF − 1) = 30.1 kΩ × (2.5/1.1834 − 1) ≈ 33.2 kΩ. Standard 1% values: R1 = 33.2 kΩ, R2 = 30.1 kΩ - verified in TI's TPS76701 application guide for 2.5-V output.

Does TPS76701QPWP require a minimum load for stability?

No, TPS76701QPWP is stable at zero load - no minimum output current is required. The datasheet explicitly states "The TPS767xx family is stable even at zero load" (Section 9.4.1). This allows use in intermittent-sensing applications like wireless sensor nodes where the downstream circuit draws current only during brief active periods.

Can TPS76701QPWP be used with ceramic output capacitors?

Yes, TPS76701QPWP is stable with ceramic output capacitors ≥10 µF and ESR between 50 mΩ and 1.5 Ω - confirmed in Section 10.1.1. Most commercial 10-µF X7R/X5R SMD ceramics meet this; avoid ultra-low-ESR types (<20 mΩ) unless compensated per TI's stability guidelines. Ceramic caps enable smaller footprint and better transient response than tantalum alternatives.

What happens to TPS76701QPWP during thermal shutdown?

When TPS76701QPWP junction temperature reaches ~150°C, thermal protection disables the pass transistor, halting output current and reducing power dissipation. Once die cools to ~130°C, regulation automatically resumes. During shutdown, RESET remains asserted (low) if output has collapsed, providing fail-safe indication to the host microcontroller - a behavior documented in Section 9.3.3.