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Texas Instruments BUF05703PWG4
- Part No.:
- BUF05703PWG4
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BUF05703PWG4.pdf
- Description:
- IC AMP TFT-LCD 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
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Product details
Overview
BUF05703PWG4 from Texas Instruments is a 4-channel gamma correction buffer with integrated VCOM driver, designed for high-resolution LCD panel timing and voltage reference distribution. It delivers >10mA per gamma channel and >100mA typical for VCOM, supports 4.5V–16V supply, operates from –40°C to +85°C, and features rail-to-rail output and 4kV HBM ESD protection - deployed in LCD TV and flat-panel display source driver interfaces.
For engineers reviewing the BUF05703PWG4 datasheet, BUF05703PWG4 pinout, BUF05703PWG4 application, or BUF05703PWG4 equivalent, this page provides verified electrical specifications, TSSOP-14 package layout, gamma/VCOM channel mapping, load regulation performance under capacitive loads up to 10nF, and real-world selection guidance against BUF06703 and BUF07703 for multi-channel LCD biasing systems.
Technical Context
The BUF05703PWG4 implements four matched gamma buffers (Channels 1–4) and one high-current VCOM buffer in a single TSSOP-14 IC. Gamma channels 1–2 use NMOS-input stages with common-mode input range of 1V to VDD; Channels 3–4 use PMOS-input stages covering 0V to VDD–1V - enabling precise voltage follower operation across the full gamma ladder swing.
Its VCOM buffer employs enhanced output stage design delivering >100mA sink/source capability and stable drive into ≥10nF capacitive loads, with load regulation of ≤1mV/mA (sinking/sourcing). All channels maintain <15mV input offset voltage over temperature and support fast settling (≤6ms at 0.1% for gamma, ≤5.8ms for VCOM) under 10mA transient loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gamma Channels | 4 independent high-precision voltage followers for LCD gamma reference nodes |
| VCOM Channel | 1 dedicated high-current buffer (≥100mA typ) for LCD panel common electrode drive |
| Supply Range | 4.5V to 16V - compatible with standard LCD panel power rails and simplifies system-level voltage domain planning |
| Rail-to-Rail Output | Enables full-swing gamma voltage replication (e.g., 0.2V to 15.8V at VDD=16V) without headroom loss |
| Capacitive Load Drive | Stable with ≥10nF loads - eliminates need for external isolation resistors in high-CL LCD source driver interfaces |
| ESD Rating | 4kV HBM / 1.5kV CDM - meets industrial handling requirements for panel manufacturing environments |
| Operating Temp | –40°C to +85°C - qualified for consumer and commercial LCD display applications |
Pinout & Package
TSSOP-14 package (4.4mm × 5.0mm body, 0.65mm pitch), thermally optimized for LCD panel PCB space constraints and compatible with standard reflow profiles.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Main power supply input (4.5V–16V); powers all gamma and VCOM buffers |
| 2 | IN1 | Input for Gamma Channel 1 - connects to top-of-ladder gamma reference (e.g., GMA1) |
| 3 | IN2 | Input for Gamma Channel 2 - connects to second gamma node (e.g., GMA2) |
| 4 | IN3 | Input for Gamma Channel 3 - connects to mid-ladder gamma node (e.g., GMA3) |
| 5 | IN4 | Input for Gamma Channel 4 - connects to near-ground gamma node (e.g., GMA4) |
| 6 | INCOM | VCOM reference input - accepts DC bias voltage for common electrode control |
| 7 | GND | Analog ground return for all buffers and internal circuitry |
| 8 | VDD | Second VDD connection - improves power delivery integrity and reduces PSRR sensitivity |
| 9 | OUT1 | Output of Gamma Channel 1 - drives first gamma reference input of LCD source driver |
| 10 | OUT2 | Output of Gamma Channel 2 - drives second gamma reference input |
| 11 | OUT3 | Output of Gamma Channel 3 - drives third gamma reference input |
| 12 | OUT4 | Output of Gamma Channel 4 - drives fourth gamma reference input |
| 13 | OUTCOM | VCOM buffer output - directly drives LCD panel common electrode (VCOM) node |
| 14 | GND | Second ground connection - enhances noise immunity and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Matched gamma channel architecture | Buffers 1–2 (NMOS input) and 3–4 (PMOS input) optimized for full gamma ladder voltage range coverage |
| VCOM current drive | ≥100mA typical sink/source enables direct drive of large-area LCD panels without external amplification |
| Capacitive load stability | Phase margin >50° maintained with 10nF load - eliminates need for external compensation networks |
| Low quiescent current | <250µA per channel - minimizes standby power in always-on display subsystems |
| Flow-through pinout | Input-output alignment (e.g., IN1→OUT1, IN2→OUT2) simplifies PCB routing and reduces trace crosstalk |
Applications
| LCD Television Panels | LCD Monitor Modules |
|---|---|
|
Use Scenario: Driving gamma reference inputs and VCOM node in 32–65-inch LCD TVs with 6+ bit grayscale precision. IC Role / Device Role / Timing Role: Voltage follower for 4-point gamma correction ladder and high-current VCOM bias generator. Use Value: Enables accurate grayscale reproduction and reduced vertical banding by maintaining <15mV offset across temperature and driving 10nF+ panel capacitance without oscillation. |
Use Scenario: Biasing gamma and common electrode in commercial-grade desktop monitors with dual-scan or IPS panels. IC Role / Device Role / Timing Role: Reference buffer for source driver gamma inputs and active VCOM level shifter. Use Value: Delivers <6ms 0.1% settling on gamma channels and <5.8ms on VCOM, ensuring clean transitions during dynamic image updates. |
| Industrial HMI Displays | Medical Diagnostic Monitors |
|
Use Scenario: Providing stable gamma and VCOM references in fanless, sealed industrial HMIs operating in extended temperature ranges. IC Role / Device Role / Timing Role: Precision analog buffer with –40°C to +85°C qualification and 4kV HBM ESD robustness. Use Value: Maintains <1mV/mA load regulation under 30mA VCOM transients - critical for flicker-free operation in vibration-prone environments. |
Use Scenario: Supporting DICOM-compliant grayscale rendering in diagnostic imaging displays requiring strict luminance uniformity. IC Role / Device Role / Timing Role: Low-noise (<45nV/√Hz) gamma buffer ensuring minimal signal degradation in critical reference paths. Use Value: Achieves <0.25V low-level output voltage at 10mA load (VOL4), preserving contrast ratio integrity across clinical viewing angles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gamma correction buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BUF06703PW | 6 gamma channels, no VCOM buffer; TSSOP-16 package; identical supply range and temp grade | Used where >4 gamma points required but VCOM is driven separately (e.g., discrete op-amp or dedicated VCOM IC) | Select BUF06703PW when panel design requires six gamma references and VCOM is sourced externally |
| BUF07703PWG4 | 6 gamma + 1 VCOM channel; HTSSOP-20 PowerPAD™ package; higher thermal dissipation (3.83W vs 1.11W) | Deployed in high-power, high-channel-count panels (e.g., 4K UHD TVs) needing both 6 gamma refs and integrated VCOM | Choose BUF07703PWG4 for designs scaling beyond 4 gamma points while retaining single-chip VCOM integration |
Compared with BUF06703PW and BUF07703PWG4, the BUF05703PWG4 offers optimal cost and board space for 4-gamma + VCOM LCD architectures - delivering identical VCOM drive strength and thermal specs as BUF07703PWG4 in a smaller TSSOP-14 footprint, but with two fewer gamma channels than either alternative.
Availability
BUF05703PWG4 is available at Aetrix Electronics and suitable for LCD television displays, industrial HMI panels, and medical diagnostic monitors requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for BUF05703PWG4 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 display interface and power management ICs.
The BUFxx703 product line was engineered specifically for LCD gamma correction and VCOM biasing - balancing high current drive, capacitive load stability, and multi-channel matching to replace discrete op-amp solutions in cost-sensitive display modules.
FAQ
What is the function of the INCOM and OUTCOM pins on the BUF05703PWG4?
The INCOM pin accepts the DC reference voltage applied to the LCD panel's common electrode (VCOM), while OUTCOM delivers the buffered, high-current version of that signal - capable of sourcing or sinking ≥100mA to drive large panel capacitances directly. This eliminates the need for external amplification in the VCOM path of the BUF05703PWG4-based design.
Can the BUF05703PWG4 drive 10nF capacitive loads without instability?
Yes - the BUF05703PWG4 maintains >50° phase margin with 10nF loads, as confirmed in Figure 37 and Figure 38 of the SBOS269C datasheet. Its output stage is specifically tuned for LCD source driver interfaces where gamma and VCOM outputs connect to heavy capacitive nodes, eliminating need for series isolation resistors or external compensation.
How does the BUF05703PWG4 handle input voltage range across its four gamma channels?
Gamma Channels 1–2 feature NMOS-input stages supporting 1V to VDD input range, ideal for top-of-ladder voltages; Channels 3–4 use PMOS-input stages covering 0V to VDD–1V, optimized for lower-voltage gamma nodes. This matched architecture ensures full-rail operation across the entire gamma correction curve without clipping in the BUF05703PWG4.
What is the maximum continuous output current capability of the BUF05703PWG4's VCOM channel?
The VCOM channel of the BUF05703PWG4 is specified for >100mA typical continuous output current in both sourcing and sinking directions, with load regulation of ≤1mV/mA. This is validated across the full operating temperature range (–40°C to +85°C) and enables direct drive of large-format LCD panels without thermal derating concerns.
Is the BUF05703PWG4 pin-compatible with other devices in the BUFxx703 family?
No - the BUF05703PWG4 uses a TSSOP-14 package with 14 pins, while BUF06703PW uses TSSOP-16 and BUF07703PWG4 uses HTSSOP-20 PowerPAD™. Pin counts, layouts, and channel allocations differ; PCB redesign is required when substituting between BUFxx703 variants. The BUF05703PWG4 pinout is unique to its 4+1 channel configuration.
BUF05703PWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- TFT-LCD Panels: Gamma Buffer, VCOM Driver
- Output Type:
- Rail-to-Rail
- Number of Circuits:
- 4
- -3db Bandwidth:
- 800 kHz
- Slew Rate:
- 1V/µs
- Current - Supply:
- 1.7 mA
- Current - Output / Channel:
- -
- Voltage - Supply, Single/Dual (±):
- 4.5V ~ 16V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-TSSOP
BUF05703PWG4 FAQ
1.How can I place an order for BUF05703PWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUF05703PWG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BUF05703PWG4 reliable?
The price and inventory of BUF05703PWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUF05703PWG4 is usually 5 days.
3.What payment methods are accepted for BUF05703PWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUF05703PWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUF05703PWG4?
BUF05703PWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUF05703PWG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BUF05703PWG4?
For technical support, including BUF05703PWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUF05703PWG4 requirements.
6.How does Aetrix verify that BUF05703PWG4 is sourced from the original manufacturer or authorized distributors?
All BUF05703PWG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BUF05703PWG4 meets industry standards.
7.What is the process for return or replacement of BUF05703PWG4?
All BUF05703PWG4 units undergo pre-shipment inspection (PSI). If there is an issue with BUF05703PWG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BUF05703PWG4 part is unused and in its original packaging.
Return procedure for BUF05703PWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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