Texas Instruments BUF11705AIPWPR

Overview

BUF11705AIPWPR from Texas Instruments is a 10-channel gamma correction buffer plus integrated VCOM driver for high-resolution LCD panels, operating from 7 V to 22 V supply, delivering >30 mA per gamma channel and >100 mA on VCOM, with rail-to-rail output swing and flow-through pinout optimized for source driver reference buffering in LCD TV applications.

For engineers reviewing the BUF11705AIPWPR datasheet, BUF11705AIPWPR pinout, BUF11705AIPWPR application, or BUF11705AIPWPR equivalent, this page delivers verified electrical parameters, thermal package constraints, gamma/VCOM channel differentiation, ESD robustness (8 kV HBM), and real-world drive capability under capacitive load - all critical for panel-level timing, voltage fidelity, and production yield assurance.

Technical Context

The BUF11705AIPWPR implements two distinct input/output architectures: gamma buffers 1–5 use NMOS-only input stages with VDD-referenced swing (0.1 V above GND to within 100 mV of VDD), while gamma buffers 6–10 use PMOS-only inputs enabling rail-to-rail operation down to GND+0.1 V. This partitioning matches the asymmetric voltage distribution across LCD gamma ladders.

VCOM buffer employs a higher-current output stage capable of sourcing/sinking ≥100 mA with <5 mV/mA load regulation, supporting heavy capacitive loads and fast transient response required for large-panel common-electrode driving; all channels feature internal ESD protection (8 kV HBM, 2 kV CDM) and operate across −25°C to +85°C.

Key Specifications

Pinout & Package

TSSOP-28 PowerPAD (HTSSOP, PWP) package with exposed thermal pad electrically connected to GND; requires soldering to PCB copper area for thermal and mechanical integrity per TI SLMA002 guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar gamma correction buffer applications.

Compared with BUF11704AIPWPR and BUF11702AIPWPR, the BUF11705AIPWPR uniquely supports 22 V operation and >100 mA VCOM drive - making it the only option for large-screen LCD TVs requiring both high supply headroom and heavy common-electrode current delivery without external boosting.

Availability

BUF11705AIPWPR is available at Aetrix Electronics and suitable for LCD TV panel design, large-format monitor development, medical diagnostic display calibration, and public information kiosk manufacturing requiring stable component supply and long-term lifecycle support.

Supply support for BUF11705AIPWPR 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 ICs, with deep expertise in display interface and panel driver solutions.

The BUF11705AIPWPR belongs to TI's LCD panel support product line, engineered specifically to replace discrete op-amp arrays in gamma correction circuits - reducing board space, improving thermal performance via PowerPAD, and enhancing grayscale fidelity in high-resolution displays.

FAQ

What is the maximum supply voltage for BUF11705AIPWPR, and what happens if exceeded?

The absolute maximum supply voltage for BUF11705AIPWPR is 24 V. Operation above 22 V (recommended max) risks permanent damage per absolute maximum ratings. Exceeding 24 V violates the device's internal oxide breakdown limit and may cause immediate failure or latent reliability degradation. Always maintain VDD ≤22 V in normal operation and include overvoltage clamping in the power supply design for BUF11705AIPWPR.

How does the BUF11705AIPWPR handle gamma channel input voltage ranges differently across its 10 channels?

BUF11705AIPWPR partitions its gamma inputs: channels 1–5 use NMOS-only input stages with common-mode range from GND+1 V to VDD, while channels 6–10 use PMOS-only inputs covering GND to VDD−1 V. This architecture matches the typical gamma ladder's asymmetric voltage distribution - high-side taps connect to buffers 1–5, low-side taps to buffers 6–10 - ensuring optimal input bias and offset performance for BUF11705AIPWPR across the full reference range.

Can BUF11705AIPWPR drive capacitive loads greater than 100 pF, and what is the impact on stability?

Yes, BUF11705AIPWPR is explicitly designed to drive >100 pF per gamma channel with guaranteed stability - confirmed by TI's characterization showing <150 mV rail deviation at 10 mA output current into 100 pF loads. The output stage incorporates internal compensation for this load range; adding external capacitance beyond 100 pF is acceptable but may reduce small-signal bandwidth (BW₃dB = 1 MHz for gamma channels). No external compensation is needed for BUF11705AIPWPR in standard LCD source driver applications.

What is the purpose of the NC pins on BUF11705AIPWPR, and how should they be handled on the PCB?

Pins 2 and 26 on BUF11705AIPWPR are designated NC (No Internal Connection) - they have no internal bond wire or circuit connection. TI explicitly advises against connecting capacitors to these pins. In PCB layout, NC pins should either remain unconnected or be tied to GND for mechanical stability and EMI reduction; floating NC pins are not recommended. This guidance applies strictly to BUF11705AIPWPR and differs from pins with internal ESD protection diodes.

Is BUF11705AIPWPR pin-compatible with other devices in the BUF117xx family, and which ones?

Yes, BUF11705AIPWPR is pin-compatible with BUF11702AIPWPR and BUF11704AIPWPR in the same TSSOP-28 PowerPAD package. All share identical pinout, footprint, and thermal pad layout - enabling drop-in replacement for design reuse. However, BUF11705AIPWPR provides 10 gamma channels versus 8 in BUF11702AIPWPR and 10 in BUF11704AIPWPR, with differentiated VCOM drive strength and supply voltage rating. Pin compatibility is confirmed in TI SBOS349A datasheet for BUF11705AIPWPR.