Texas Instruments TPS65111RGERG4

Overview

TPS65111RGERG4 from Texas Instruments is a triple-output charge pump IC designed for LTPS-LCD bias generation, delivering fixed 5.0 V (16 mA), 9.0 V (2 mA), and −3.0 V (1 mA) outputs from a 2.4–5.5 V input. It features autonomous VCC boost control, ultra-low 5 mV ripple on VCC, 1.5% output voltage accuracy, and integrated sequential power-up/down control. It is used in compact portable displays requiring precise, low-noise analog and negative supply rails.

For engineers reviewing the TPS65111RGERG4 datasheet, TPS65111RGERG4 pinout, TPS65111RGERG4 application, or TPS65111RGERG4 equivalent, key selection criteria include verified triple-output regulation stability, confirmed 24-pin QFN (4×4 mm) package compatibility, validated VCC/VDD/VSS load capability under real LTPS-LCD timing constraints, and documented sequential power sequencing behavior during VIN transients.

Technical Context

The TPS65111RGERG4 implements three independent regulated charge pump stages: VCC uses autonomous x1/x1.33/x1.5/x2 boost ratio selection based on VIN–VCC delta; VDD employs fixed x2 boost from VCC to deliver 9.0 V; VSS uses fixed x−1 inversion from VCC to generate −3.0 V. All outputs are internally sequenced with 75% VCC→75% VSS→100% VDD power-up and reverse-order shutdown.

It integrates I²C-compatible serial interface pins (CLK/DATA), EEPROM power (VROM), enable logic (EN), and dedicated flying capacitor terminals per channel (CCP/CCN for VCC; CDP/CDN for VDD; CSP/CSN for VSS). Thermal pad (Pin 25) and dual ground domains (AGND/PGND) support noise isolation in high-density LCD bias layouts.

Key Specifications

Pinout & Package

TPS65111RGERG4 is housed in a 24-pin VQFN package (RGE drawing), 4 mm × 4 mm × 0.9 mm, with exposed thermal pad (Pin 25) for PCB-level heat dissipation. The package is RoHS-compliant, green (no Sb/Br), and moisture sensitivity level 2 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-output LCD bias applications.

Compared with TPS65111RGERG4, TPS65111RGER offers identical performance in volume production but lacks G4-level traceability; TPS65110RGERG4 provides compatible pinout and sequencing but delivers lower output voltages incompatible with 5.0 V–based LTPS timing architectures.

Availability

TPS65111RGERG4 is available at Aetrix Electronics and suitable for smartphone display subsystems, portable medical monitor screens, PDA display modules, and LTPS-LCD evaluation platforms requiring stable component supply with full lifecycle traceability.

Supply support for TPS65111RGERG4 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 over 50 years of innovation in energy-efficient power conversion and precision analog solutions.

The TPS6511x product line was engineered specifically for compact LTPS-LCD bias applications in portable electronics, integrating triple charge pumps, sequencing logic, and low-noise regulation into minimal footprint packages to replace multi-component discrete solutions.

FAQ

What is the exact output voltage tolerance of the VCC rail on the TPS65111RGERG4?

The TPS65111RGERG4 guarantees a VCC output voltage of 5.0 V with ±1.5% accuracy under recommended operating conditions (VI = 3.6 V, IVCC = 5 mA, TA = 25°C). This is confirmed in the Electrical Characteristics table on page 4 of SLVS495, where VCC output DC voltage range is specified as 4.925 V to 5.075 V. The 1.5% tolerance ensures compatibility with LTPS display driver ICs requiring tight analog supply regulation.

Does the TPS65111RGERG4 support I²C communication for dynamic configuration?

The TPS65111RGERG4 includes dedicated CLK and DATA pins that implement a standard-mode I²C interface, as documented in the PIN ASSIGNMENTS and FUNCTIONAL BLOCK DIAGRAM sections of SLVS495. However, the datasheet confirms these pins interface with internal EEPROM (powered by VROM) for factory-programmed settings-not user-writable registers. No runtime reconfiguration or address selection is supported; the interface is read-only for status verification.

How does the TPS65111RGERG4 handle input voltage drops during operation?

The TPS65111RGERG4 incorporates under-voltage lockout (UVLO) with 2.2 V to 2.4 V threshold hysteresis and maintains guaranteed power-down sequencing even during sudden VIN collapse. As described in the DETAILED DESCRIPTION section, when VIN drops abnormally, the device executes VDD→VSS→VCC shutdown order regardless of EN state-preventing latch-up in connected LTPS display ICs. This behavior is validated in Figure 10 of SLVS495.

What external capacitors are mandatory for stable operation of the TPS65111RGERG4?

Four capacitor types are mandatory: (1) 4.7 µF input capacitor (Ci) on VIN, (2) 2.2 µF VCC output capacitor (CCO), (3) 1.0 µF VDD output capacitor (CDO), and (4) 2.2 µF VSS output capacitor (CSO). Additionally, three 0.22 µF flying capacitors (CC1–CC3) for VCC and two 0.1 µF flying capacitors (CD1, CS) for VDD/VSS are required per the RECOMMENDED OPERATING CONDITIONS table on page 2 of SLVS495. Omission of any violates minimum stability criteria.

Is the TPS65111RGERG4 pin-compatible with other members of the TPS6511x family?

Yes-the TPS65111RGERG4 shares identical pinout, package (RGE), and terminal functions with TPS65110RGERG4, TPS65111RGE, and all RGE-suffixed variants. Pin assignments on page 5 of SLVS495 confirm identical mapping for all 24 signals including CSP1, VCC, CCP3, VIN, DATA, EN, AGND, VROM, VDD, PGND, VSS, and CSN1. This enables direct PCB reuse across voltage variants when layout accommodates both 3.3 V/7.5 V/−2.7 V and 5.0 V/9.0 V/−3.0 V configurations.