Texas Instruments TPS65137ADSCR

Overview

TPS65137ADSCR from Texas Instruments is a dual-output AMOLED display power supply IC integrating a boost converter with LDO post-regulation for VPOS and a digitally programmable buck-boost converter for VNEG. It delivers fixed +4.63 V / 200 mA and adjustable –2.2 V to –5.23 V / 200 mA from a 2.3–5.5 V input, enabling high-fidelity pixel voltage control in mobile phone displays.

For engineers reviewing the TPS65137ADSCR datasheet, TPS65137ADSCR pinout, TPS65137ADSCR application, or TPS65137ADSCR equivalent, this page provides verified electrical parameters, validated pin functions, confirmed AMOLED-specific timing behavior, and real-world alternative selection guidance for display power design.

Technical Context

The TPS65137ADSCR employs a two-stage architecture: a peak-current-mode boost converter feeds an integrated LDO to generate low-ripple +4.63 V output, while a DCM-operating buck-boost converter generates the negative rail. Its digital CTRL interface implements a 5-bit DAC for precise OUTN programming via rising-edge counting.

Line transient regulation is enhanced by LDO post-regulation of VPOS, decoupling output ripple from input disturbances. The device enters advanced power-save mode at light loads by reducing switching frequency via an internal VCO, maintaining >70% efficiency down to 10 mA per rail.

Key Specifications

Pinout & Package

TPS65137ADSCR uses a 3×3 mm, 10-pin WSON package (TI package code DSC) with an exposed thermal die pad that must be connected to analog ground for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-rail AMOLED power supply applications.

Compared with TPS65137ADSCR, TPS65132A2YFFR offers simpler implementation but sacrifices programmability, while RTQ2132BWGE provides greater sequencing freedom at the cost of increased external component count and reduced VPOS ripple performance.

Availability

TPS65137ADSCR is available at Aetrix Electronics and suitable for smartphone display modules, wearable OLED interfaces, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS65137ADSCR 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 and embedded processing technologies, with leadership in power management ICs for portable electronics.

The TPS65137 product line was designed specifically for high-resolution AMOLED display biasing in space-constrained mobile devices, emphasizing low noise, digital programmability, and thermal resilience.

FAQ

What is the default negative output voltage of the TPS65137ADSCR?

The TPS65137ADSCR defaults to –4.93 V on the OUTN pin when the CTRL pin is pulled high without any additional rising-edge pulses. This value is factory-trimmed and specified across –40 °C to +85 °C ambient temperature. The TPS65137ADSCR achieves this using its internal 5-bit DAC and requires no external components to operate at this setting.

How does the CTRL pin function in the TPS65137ADSCR?

The CTRL pin on the TPS65137ADSCR serves dual roles: it acts as the device enable signal and as a digital interface for programming the negative output voltage. A logic-high level enables the IC, and subsequent rising edges (minimum 2 µs wide, spaced ≥2 µs apart) increment the DAC code to select one of 31 possible VNEG values. The TPS65137ADSCR ignores falling edges and only counts valid rising transitions after initial enable.

What is the purpose of the CT pin on the TPS65137ADSCR?

On the TPS65137ADSCR, the CT pin sets the transition time (t_set) for OUTN voltage changes between programmed levels. Connecting an external capacitor (e.g., 100 nF) forms an RC network with the pin's ~250 kΩ output impedance, yielding ~25 ms for 70% settling. Leaving CT open minimizes t_set for rapid reconfiguration. This feature prevents display artifacts during dynamic gamma tuning in the TPS65137ADSCR.

Does the TPS65137ADSCR include short-circuit protection?

Yes, the TPS65137ADSCR integrates short-circuit protection for both output rails. When VPOS and VNEG are shorted, the device cycles between zero and 100 mA output current to limit power dissipation. It also monitors switch current limits (1.1 A for SWN, 0.9 A for SWP) and triggers thermal shutdown at 145 °C. These protections are active during normal operation and startup sequences in the TPS65137ADSCR.

What package type and thermal characteristics does the TPS65137ADSCR use?

The TPS65137ADSCR uses a 3×3 mm WSON-10 package (TI code DSC) with an exposed thermal die pad. Its junction-to-board thermal resistance is 25.2 °C/W, and junction-to-ambient is 56.5 °C/W under JEDEC-standard conditions. The exposed pad must be soldered to a dedicated PCB thermal plane connected to analog ground to achieve rated 200 mA per rail performance and prevent thermal shutdown in the TPS65137ADSCR.