Texas Instruments TPS65140PWPRG4

Overview

TPS65140PWPRG4 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), regulated 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 gate/source drive voltages for TFT LCD panels in portable displays.

For engineers reviewing the TPS65140PWPRG4 datasheet, TPS65140PWPRG4 pinout, TPS65140PWPRG4 application, or TPS65140PWPRG4 equivalent, key selection criteria include its fault-detection shutdown behavior (TPS65140 enters shutdown on any output undervoltage), 1.6-MHz fixed-frequency operation enabling compact magnetics, integrated soft-start and power-on sequencing, and system-level power good signaling with ±10% regulation monitoring across all three main outputs.

Technical Context

The TPS65140PWPRG4 implements a voltage-mode PWM boost converter with input feedforward and virtual synchronous operation using an external Schottky diode and internal P-MOSFET (Q2, r_DS(on) = 9–22 Ω) to sustain continuous conduction mode across load range. Its 1.6-MHz oscillator enables 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) - are independently monitored for regulation; failure triggers full device shutdown (unlike TPS65141). The linear regulator controller (VO4) operates independently via ENR and drives an external BJT (e.g., BCP68) to deliver 3.3 V at up to 500 mA with 0.064%/A load regulation.

Key Specifications

Pinout & Package

TPS65140PWPRG4 is packaged in a 24-pin HTSSOP (PWP) with exposed thermal PowerPAD™ (7.80 mm × 4.40 mm), requiring connection of the thermal pad to PGND for thermal performance and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65141PWPR and TPS65145RGER, the TPS65140PWPRG4 uniquely combines full fault-triggered shutdown, 2.3-A switch capability, and HTSSOP packaging with PowerPAD™ - making it the only option qualified for designs requiring guaranteed safe shutdown on any output fault.

Availability

TPS65140PWPRG4 is available at Aetrix Electronics and suitable for TFT LCD notebook displays, automotive navigation systems, portable DVD players, and industrial HMI panels requiring stable component supply and long-term production continuity.

Supply support for TPS65140PWPRG4 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 display power solutions.

The TPS6514x product line was designed specifically to consolidate multi-rail LCD bias generation into a single IC for portable and automotive TFT displays - emphasizing integration, regulation accuracy, and fault resilience.

FAQ

What is the key safety distinction of TPS65140PWPRG4 versus other TPS6514x variants?

The TPS65140PWPRG4 features fault-detection shutdown: if VO1, VO2, or VO3 falls outside ±10% regulation, the device fully shuts down - a behavior absent in TPS65141PWPR and differentiated from TPS65145RGER's lower current limit. This makes TPS65140PWPRG4 the only variant qualified for safety-critical LCD biasing where unregulated outputs could damage panel circuitry.

Can TPS65140PWPRG4 operate from a 3.3-V input to generate 15-V VO1?

Yes - TPS65140PWPRG4 supports input voltages from 2.7 V to 5.8 V, and its 1.6-MHz boost converter efficiently generates VO1 up to 15 V from 3.3 V. With VI = 3.3 V, VO1 = 15 V requires ~4.5× step-up ratio; TI's reference design confirms stable operation using a 4.7-µH inductor and appropriate output capacitor, delivering 400 mA with <1% accuracy.

How does the C2–/MODE pin configure TPS65140PWPRG4 charge pump operation?

The C2–/MODE pin on TPS65140PWPRG4 selects charge pump topology: grounding it configures VO3 as a voltage doubler (e.g., VO1 = 12 V → VO3 = 24 V); connecting a flying capacitor between C2–/MODE and C2+ configures it as a tripler (VO1 = 12 V → VO3 = 36 V). This pin must never float - incorrect termination causes undefined VO3 regulation.

Does TPS65140PWPRG4 require external compensation components?

Yes - TPS65140PWPRG4 uses external loop compensation via the COMP pin. A typical network includes a series RC (e.g., 10-kΩ resistor + 10-nF capacitor) from COMP to GND, as specified in TI's SLVS497F datasheet Figure 19. This allows designers to optimize transient response and phase margin for their specific inductor and output capacitor values.

What thermal management is required for TPS65140PWPRG4 in continuous 400-mA VO1 operation?

At 400 mA VO1 output with 5-V input, TPS65140PWPRG4 dissipates ~1.1 W. Its HTSSOP package has R_θJA = 37.2°C/W; with proper PCB copper pour tied to the PowerPAD™ and PGND, junction temperature stays below 125°C at 85°C ambient. TI recommends ≥200 mm² of 2-oz copper connected to the thermal pad for reliable operation.