Texas Instruments TPS65140PWPR

Overview

TPS65140PWPR from Texas Instruments is a triple-output LCD power supply IC integrating a 1.6-MHz boost converter (VO1 up to 15 V / 400 mA), regulated negative charge pump (VO2 down to –12 V / 20 mA), positive charge pump (VO3 up to 30 V / 20 mA), and a 3.3-V linear regulator controller (VO4), all in a single 24-pin HTSSOP package. It delivers precise, sequenced bias rails for TFT LCD source/gate drivers in portable displays.

For engineers reviewing the TPS65140PWPR datasheet, TPS65140PWPR pinout, TPS65140PWPR application, or TPS65140PWPR equivalent, this page provides verified functional identity, confirmed pin roles, validated fault-protection behavior (shutdown on any output fault), real-world thermal metrics (RθJA = 37.2°C/W), and direct alternative part comparisons - all extracted from TI's production-grade SLVS497F datasheet.

Technical Context

The TPS65140PWPR implements Virtual Synchronous Converter Technology in its main boost stage, enabling continuous conduction mode across full load range using an integrated P-MOSFET (rDS(on) = 9–22 Ω) and external Schottky diode. Its 1.6-MHz fixed-frequency operation allows use of small 4.7-µH inductors and 220-nF flying capacitors.

All three regulated outputs - VO1 (boost), VO2 (negative charge pump), and VO3 (positive charge pump) - feature independent feedback loops with dedicated FB pins (FB1, FB2, FB3), while VO4 uses FB4 for 3.3-V regulation via external BJT. Fault detection triggers full shutdown only in TPS65140/TPS65145 variants - confirmed by datasheet Section 7.3.8 and Electrical Characteristics Table.

Key Specifications

Pinout & Package

TPS65140PWPR is housed in a 24-pin HTSSOP (PWP) package measuring 7.80 mm × 4.40 mm with exposed PowerPAD™ thermal pad connected to PGND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LCD bias supply applications.

Compared with TPS65141PWPR, the TPS65140PWPR adds fail-safe shutdown for mission-critical displays; compared with TPS65145PWPR, it supports higher VO1 load current and wider panel compatibility - making it the default choice for general-purpose notebook and monitor designs.

Availability

TPS65140PWPR is available at Aetrix Electronics and suitable for TFT LCD notebooks, automotive navigation systems, and industrial display modules requiring stable component supply across multi-year production cycles.

Supply support for TPS65140PWPR 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 and embedded processing technologies, with decades of expertise in power management ICs for display and portable electronics.

The TPS6514x product line was designed specifically to consolidate multiple discrete bias supplies into a single IC for TFT LCD panels - targeting space, cost, and reliability improvements in consumer and automotive displays.

FAQ

What is the key functional difference between TPS65140PWPR and TPS65141PWPR?

The TPS65140PWPR enters full shutdown when any of its three main outputs (VO1, VO2, VO3) falls outside regulation, while the TPS65141PWPR continues operating without shutdown. This makes TPS65140PWPR appropriate for safety-critical or high-reliability displays where fault containment is required. Both share identical pinout, package, and basic regulation architecture - only fault response differs.

Does TPS65140PWPR support both voltage doubler and tripler modes for VO3?

Yes, TPS65140PWPR supports both modes via the C2–/MODE pin. When connected to GND, it operates as a voltage doubler; when a flying capacitor is connected, it functions as a tripler. The datasheet confirms this behavior in Pin Functions (Section 5) and Feature Description (Section 7.3.4), and specifies that C2+ must be left open in doubler mode.

What external components are mandatory for basic TPS65140PWPR operation?

Mandatory components include: one 4.7-µH inductor on SW/VIN, two 220-nF flying capacitors (C1+, C1– and C2+, C2–), output capacitors (22 µF on VO1, 4.7 µF on VO4), feedback resistors for VO1/VO2/VO3, and an external BCP68 transistor for the 3.3-V linear regulator. The COMP pin also requires a 10-nF compensation capacitor per Figure 12 in the datasheet.

How does the power good (PG) signal behave during startup and fault conditions?

The PG pin is open-drain and goes high only after all three outputs (VO1, VO2, VO3) reach and stabilize within ±10% of their nominal values - confirmed in Electrical Characteristics (Section 6.5). If any output drops below its threshold (e.g., VO2 < –9.5% of nominal), PG immediately pulls low and the TPS65140PWPR enters shutdown. Recovery requires toggling EN or cycling VIN.

Is the 3.3-V linear regulator output (VO4) internally fixed or adjustable?

The VO4 output is fixed at 3.3 V, as confirmed by FB4 description in Pin Functions (Section 5) and Electrical Characteristics (Section 6.5), which states "linear regulator controller is set to a fixed output voltage of 3.3 V". No external resistor programming is required - the 3.3-V regulation is achieved through internal reference and feedback loop design.