TPS73701DRBR

Texas Instruments TPS73701DRBR Adjustable 1-A LDO Regulator (1.2–5.5 V, WSON-8) — Datasheet & Specs

The Texas Instruments TPS73701DRBR is an adjustable, 1-A low-dropout (LDO) linear regulator in a compact 3 x 3 mm WSON-8 (DRB) package. Designed for point-of-load regulation and for post-regulation behind DC/DC converters, this device brings dependable regulation performance with enable control, current limit protection, and thermal shutdown for robust operation across demanding environments.

Product Overview

The TI TPS73701DRBR belongs to the TPS737 series of LDO regulators and offers a flexible output voltage range from 1.2 V to 5.5 V with up to 1 A load capability. Its small-footprint WSON-8 (DRB) package and surface-mount design make it a strong fit for dense layouts where board area and thermal performance both matter. The regulator includes an enable pin for power sequencing and low-power disable, and integrates standard protection features to help safeguard both the regulator and downstream circuitry.

Engineers use the Texas Instruments TPS73701DRBR to clean up rails from switching supplies, generate quiet analog/RF rails, and supply digital subsystems at the point of load. With a broad operating temperature range of -40°C to +125°C and RoHS compliance, the device is well-suited for industrial, communications, and general embedded applications.

Key Features and Benefits

• Adjustable output voltage: 1.2 V to 5.5 V
• Up to 1 A output current for powering moderate-load rails
• Low-dropout linear regulation suitable for post-regulation after switching converters
• Enable (EN) control for sequencing and power saving
• Integrated protection: current limit and thermal shutdown
• Compact WSON-8 (DRB) 3 x 3 mm footprint for dense designs
• Surface-mount package optimized for automated assembly (Tape & Reel option)
• Single regulator channel for straightforward design-in
• Industrial temperature range: -40°C to +125°C

Specifications

• Brand / Manufacturer: Texas Instruments (TI)
• Series: TPS737
• Category: PMIC – LDO Regulators
• MPN: TPS73701DRBR
• Output type: Adjustable
• Output voltage range: 1.2 V to 5.5 V
• Maximum output current: 1 A
• Number of regulators: 1
• Package: WSON-8 (DRB), 3 x 3 mm
• Package code suffix: DRBR (supplied Tape & Reel)
• Mounting type: Surface Mount
• Pin count: 8
• Operating temperature range: -40°C to +125°C
• Protections: Thermal shutdown, current limit
• RoHS status: RoHS Compliant

Not specified in datasheet excerpt provided here (refer to the linked datasheet for details): dropout voltage, quiescent current, PSRR, noise, start-up timing, output capacitor requirements, and detailed electrical characteristics.

Package, Pinout, and Handling

• Package family: WSON-8 (DRB)
• Body size: 3 x 3 mm
• Shipment: Tape & Reel (DRBR suffix)
• Assembly: Surface mount reflow

WSON packages deliver a small footprint and typically provide good thermal pathways through the exposed pad and board copper. While the TPS73701DRBR is compact, always refer to the TI layout guidance in the datasheet for thermal and electrical performance, including recommended copper areas, via stitching, and any pad design notes specific to the DRB package.

Applications

The Texas Instruments TPS73701DRBR is designed for:

• Point-of-load regulation for digital ICs and subsystems
• Post-regulation after DC/DC converters to reduce ripple and noise
• General-purpose power rail generation in embedded systems
• RF/analog circuits that benefit from linear regulation

Example use cases include powering microcontrollers and FPGAs at the point of load, providing clean rails to data converters and clocks, or stabilizing supply rails in communication equipment and test instruments.

Design Considerations

While the TPS73701DRBR is straightforward to integrate, a few best practices help ensure reliable results. For any values or component types not explicitly listed below, consult the official TI datasheet.

Output Voltage Selection

• As an adjustable LDO, VOUT is typically set using an external resistor divider from the output to the ADJ/FB pin (see datasheet for the recommended equation and component selection guidance).
• Choose precision resistors with appropriate temperature coefficients to maintain voltage accuracy across temperature.

Input and Output Decoupling

• Place input and output capacitors close to the device pins to minimize trace inductance and help ensure stability and transient response.
• The exact capacitor values, types, and ESR ranges should follow the recommendations in the TI datasheet for the TPS73701 variant.

Enable Control and Sequencing

• The enable pin allows the regulator to be disabled for power savings or to support power rail sequencing.
• Verify logic level thresholds and any required pull-ups/downs as specified in the datasheet.

Thermal and Current Protection

• Built-in current limit and thermal shutdown protect the device under overload and excessive temperature conditions.
• For 1-A operation in small packages, board-level thermal design is key. Provide adequate copper area and thermal vias beneath and around the device as recommended by TI.

Placement and Layout

• Keep the high-current path (IN pin, OUT pin, and associated capacitors) short and wide for reduced impedance.
• Separate sensitive analog/RF loads from noisy switching nodes and route the feedback/adjust pin away from high-current traces to minimize coupling.

Lifecycle, Availability, and Sourcing

• Lifecycle status: Active (per provided data)
• Manufacturer: Texas Instruments (OCM source: TI)
• Replacements: None specified in the available data
• Packaging: Tape & Reel (DRBR) for automated assembly

For pricing and lead time, check authorized TI distributors and the TI product page. Pricing varies by distributor and order quantity; see distributor listings for current stock and volume breaks. If your approved vendor list requires formal documentation, pair the TI datasheet with distributor certificates and RoHS declarations as applicable.

Sourcing tips:

• Confirm the full part number “TPS73701DRBR” (including DRBR suffix) to ensure the WSON-8, Tape & Reel variant.
• Validate environmental and operating temperature requirements (this device supports -40°C to +125°C) against your project specifications.
• For second-source planning, remain within the same package footprint and ensure equal or better electrical specs. No direct replacements are specified in the provided data; consult TI if a pin-compatible alternative is required.

Compliance and Environmental

• RoHS status: RoHS Compliant
• Operating temperature: -40°C to +125°C
• Additional environmental/compliance documents: Not specified in datasheet excerpt provided here

If your application demands specific environmental certifications or material declarations (such as REACH), refer to TI’s product page resources or request documentation through authorized channels.

Why Choose the Texas Instruments TPS73701DRBR?

• Flexibility: Adjustable output across 1.2–5.5 V supports many popular rails.
• Power density: Delivers up to 1 A in a compact 3 x 3 mm WSON-8 footprint.
• Robustness: Integrated current limit and thermal shutdown enhance system resilience.
• Ease of integration: Enable pin simplifies sequencing and power management.
• Vendor confidence: Backed by Texas Instruments with broad ecosystem support and documentation.

These strengths make the TPS73701DRBR a versatile option when you need clean, regulated power close to your load, especially after a switching regulator where an LDO can attenuate ripple and switching artifacts.

Practical Application Examples

• FPGA and MCU rails: Post-regulate down to a precise core or I/O voltage while enabling independent start-up and shutdown.
• Data converters and clocks: Provide cleaner, lower-noise supply rails for ADCs, DACs, PLLs, and oscillators compared to direct DC/DC outputs.
• Communications equipment: Generate stable local rails for transceivers, PHYs, and analog front ends.
• Test and measurement: Power sensitive analog stages and references where linear regulation can improve measurement fidelity.

Always double-check thermal budgets and dropout headroom for your chosen input/output conditions using TI’s datasheet guidance.

Frequently Asked Questions (FAQs)

• Q: What is the output voltage range of the TPS73701DRBR?
  A: Adjustable from 1.2 V to 5.5 V.

• Q: What is the maximum load current?
  A: Up to 1 A.

• Q: Which package does the Texas Instruments TPS73701DRBR use?
  A: WSON-8 (DRB) in a 3 x 3 mm body, supplied as Tape & Reel for the DRBR ordering code.

• Q: Is the device RoHS compliant?
  A: Yes, it is listed as RoHS Compliant.

• Q: What protections are integrated?
  A: Current limit and thermal shutdown.

• Q: Does it have an enable pin?
  A: Yes. The enable function supports power sequencing and low-power disable.

• Q: How many regulators are integrated?
  A: One.

• Q: What is the operating temperature range?
  A: -40°C to +125°C.

• Q: Is the part active and in production?
  A: Lifecycle status is Active per the provided data.

• Q: Are there specified drop-out voltage or noise figures here?
  A: Not specified in this summary. Refer to the official TI datasheet for detailed electrical characteristics.

Resources and Documentation

• Texas Instruments product page: https://www.ti.com/product/TPS737
• Datasheet (TPS73701): https://www.ti.com/lit/ds/symlink/tps73701.pdf

For design reviews, layout recommendations, and application-specific guidance, consult the TI datasheet and application resources. If particular parameters are critical to your design—such as dropout voltage at your load current, output noise, or capacitor ESR compatibility—use the official datasheet values and characterization curves.

Summary

The Texas Instruments TPS73701DRBR is an adjustable 1-A LDO regulator in a small WSON-8 (DRB) 3 x 3 mm package, prepared for high-density layouts and industrial temperature environments. It spans 1.2–5.5 V on the output, supports enable-based sequencing, and includes current limit and thermal shutdown for built-in resilience. These characteristics make the TI TPS73701DRBR an excellent choice for point-of-load regulation, post-regulation behind DC/DC converters, and general-purpose embedded power rails where clean, dependable linear regulation is required.