Texas Instruments TPS65101PWP

Overview

TPS65101PWP from Texas Instruments is a triple-output LCD power supply IC integrating a 1.6-MHz boost converter (VO1 up to 15 V / 350 mA), a negative charge pump (VO2 down to –12 V / 20 mA), a positive charge pump (VO3 up to 30 V / 20 mA), an integrated VCOM buffer, and a 3.3-V linear regulator controller - all in a single HTSSOP-24 package for TFT LCD biasing in portable displays.

For engineers reviewing the TPS65101PWP datasheet, TPS65101PWP pinout, TPS65101PWP application, or TPS65101PWP equivalent, key selection criteria include input voltage range (2.7–5.8 V), absence of fault shutdown on output undervoltage (distinguishing it from TPS65100/05), soft-start sequencing behavior, and compatibility with external NPN/PNP pass transistors for the 3.3-V LDO rail.

Technical Context

The TPS65101PWP implements a fixed-frequency (1.6 MHz) PWM boost converter with virtual synchronous operation using an internal P-MOSFET (rDS(on) ≈15 Ω) and external Schottky diode, enabling continuous conduction mode across full load range. Its three regulated outputs are hierarchically sequenced: VO1 powers SUP, which feeds both charge pumps and the VCOM buffer.

Unlike TPS65100/05, the TPS65101PWP omits output fault detection - VO2/VO3/VO1 remain active even if one falls below regulation threshold. The linear regulator controller (FB4 = 3.3 V) operates independently via ENR and drives an external transistor through BASE, while VCOMIN must be ≥1.0 V to enable the VCOM buffer.

Key Specifications

Pinout & Package

TPS65101PWP is housed in a 24-pin HTSSOP (PWP) package measuring 7.80 mm × 4.40 mm with exposed PowerPAD™ thermal die connected to PGND pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65100PWP, TPS65101PWP trades fault protection for operational continuity; compared with TPS65136RGER, it offers analog configurability and integrated VCOM/LDO control at the cost of programmability and higher external component count.

Availability

TPS65101PWP is available at Aetrix Electronics and suitable for TFT LCD notebook displays, automotive infotainment panels, and industrial HMI touchscreen applications requiring stable component supply, long-term lifecycle support, and consistent electrical performance across temperature.

Supply support for TPS65101PWP 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 company specializing in analog, embedded processing, and power management technologies, with over 50 years of leadership in precision power conversion and display interface solutions.

The TPS6510x product line was designed specifically for compact, high-efficiency bias power in TFT LCD systems - delivering integrated gate drive, VCOM, and logic rails in minimal board space for portable and automotive displays.

FAQ

What is the key functional difference between TPS65101PWP and TPS65100PWP?

The TPS65101PWP lacks output fault detection circuitry present in the TPS65100PWP. When any output (VO1, VO2, or VO3) falls below its regulation threshold, TPS65101PWP continues operating, whereas TPS65100PWP enters full shutdown. This makes TPS65101PWP suitable for applications requiring graceful degradation rather than fail-safe interruption. All other electrical and pinout characteristics of the TPS65101PWP match the TPS65100PWP.

Does TPS65101PWP support both voltage doubler and tripler modes for VO3?

Yes, the TPS65101PWP supports both modes via the C2-/MODE pin. Connecting the flying capacitor to C2-/MODE configures the positive charge pump for tripler operation (VO3 ≈ 3×VO1); grounding C2-/MODE selects doubler mode (VO3 ≈ 2×VO1). The mode selection directly affects maximum achievable VO3 - e.g., with VO1 = 10 V, doubler yields ~20 V and tripler yields ~30 V - both rated for 20 mA continuous output.

How is the 3.3-V linear regulator implemented in TPS65101PWP?

The TPS65101PWP does not integrate a complete LDO but provides a linear regulator controller: FB4 sets a 3.3-V reference, ENR enables/disables the function, and BASE delivers base drive current (up to 27 mA) to an external NPN transistor. An external resistor divider on FB4 adjusts output voltage, and the pass transistor's gain determines max load current. This architecture allows high-current, low-noise 3.3-V generation while minimizing die size and thermal load on the TPS65101PWP itself.

What thermal management provisions exist for TPS65101PWP in HTSSOP-24 (PWP) package?

The TPS65101PWP in PWP package features an exposed PowerPAD™ thermal die that must be soldered to a PGND copper plane for effective heat dissipation. With RθJA = 37.2°C/W, it delivers 1.32 W max power at 85°C ambient. Layout best practices include connecting all PGND pins (7,8,10,11) and the PowerPAD to a solid inner-layer ground plane, using ≥6 thermal vias under the pad, and avoiding signal traces beneath the IC to maintain thermal path integrity.

Can VCOM buffer operation be disabled to reduce quiescent current in TPS65101PWP?

Yes, the VCOM buffer in TPS65101PWP can be fully disabled to reduce system quiescent current. Tie VCOMIN to GND - this forces the buffer into shutdown, and the VCOM pin may be left unconnected. Doing so eliminates VCOM-related quiescent draw (typically 750–1300 µA from SUP) and is recommended when the LCD panel does not require active backplane driving, such as in static or segmented display configurations.