Texas Instruments TPS65138ADRCR

Overview

TPS65138ADRCR from Texas Instruments is a dual-output AMOLED display power supply IC integrating a boost converter (4.62 V / 300 mA positive output) and digitally programmable inverting buck-boost converter (–2.2 V to –5.2 V / 300 mA negative output), operating from 2.9 V to 4.5 V input, with 0.8% VPOS regulation accuracy and 6-bit digital VNEG programming via CTRL pin - used in mobile phone AMOLED bias rails.

For engineers reviewing the TPS65138ADRCR datasheet, TPS65138ADRCR pinout, TPS65138ADRCR application, or TPS65138ADRCR equivalent, this page delivers verified functional identity, confirmed QFN-10 package mapping, validated pin roles, exact VNEG programming range (–2.2 V to –5.2 V), thermal shutdown (145 °C), and real-world soft-start and short-circuit protection behavior per TI SLVSAV3C Rev C.

Technical Context

The TPS65138ADRCR implements two independent switching regulators: a fixed 4.62 V boost converter (SWP/OUTP path) and a digitally programmable inverting buck-boost converter (SWN/OUTN path), both sharing GND and PGND separation for noise isolation. Its CTRL pin serves dual role - enable control and 6-bit DAC-based VNEG voltage selection using pulse-counting timing.

Internal architecture includes dedicated current-sense circuits for SWP (0.8–1 A limit) and SWN (1.8–2.2 A limit), separate soft-start sequences (8 ms staggered startup), CT-pin-adjustable VNEG transition time (via external capacitor), and latched short-circuit protection triggered by VPOS < 3.7 V or VNEG > –1 V for ≥3 ms during operation.

Key Specifications

Pinout & Package

TPS65138ADRCR uses a 10-pin VSON (DRC) package with 3 mm × 3 mm footprint, 0.5 mm pitch, and exposed thermal pad (connected to analog GND). Pin 1 index located at top-left corner (Q2 quadrant in tape); thermal pad must be soldered for thermal and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65138DRCR, the TPS65138ADRCR provides a narrower but more thermally optimized VNEG range (–5.2 V vs –6.2 V), while TPS65132ARSLR omits negative output entirely - making TPS65138ADRCR the sole drop-in solution for space-constrained, digitally programmable dual-rail AMOLED bias in commercial handhelds.

Availability

TPS65138ADRCR is available at Aetrix Electronics and suitable for smartphone AMOLED display bias, wearable OLED power management, and industrial handheld HMI applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS65138ADRCR 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 decades of expertise in display power solutions and high-reliability automotive/industrial products.

The TPS65138A product line delivers integrated dual-rail AMOLED power supplies optimized for battery-powered mobile devices - combining high efficiency, programmable flexibility, and robust protection in minimal footprint.

FAQ

What is the VNEG programming range for TPS65138ADRCR?

The TPS65138ADRCR supports a digitally programmable negative output voltage range of –2.2 V to –5.2 V in 41 discrete steps via CTRL pin pulse counting, with –4.9 V as the default value at power-up. This range is confirmed in TI's SLVSAV3C Rev C datasheet Table 4 and applies exclusively to the "A" variant (TPS65138A), distinguishing it from the base TPS65138 (–2.2 V to –6.2 V).

Does TPS65138ADRCR require external components for basic operation?

Yes, TPS65138ADRCR requires external components: two 4.7 µH inductors (L1, L2), five capacitors (C1–C5 including 10 µF and 100 nF ceramics), and optionally a CT capacitor for VNEG transition control. The bill of materials in TI's SLVSAV3C Rev C specifies Murata GRM21BR70J106KE76 (10 µF) and Coilcraft XFL4020-472M (4.7 µH) as validated parts - no internal compensation or power FETs are omitted.

How does the CTRL pin function in TPS65138ADRCR?

The CTRL pin on TPS65138ADRCR serves dual roles: enabling the device (HIGH = active, LOW = shutdown) and programming VNEG voltage via rising-edge counting (0–41 pulses). After power-up, it defaults to –4.9 V; each rising edge increments the 6-bit DAC. Timing parameters - tHIGH/tLOW (2–25 µs), tSTORE (30–80 µs), and tINIT (300–400 µs) - are specified in the Electrical Characteristics table and must be met for reliable programming.

What thermal performance can be expected from TPS65138ADRCR in a standard PCB layout?

With proper layout - including soldered exposed thermal pad, 2 oz copper, and 4 thermal vias - TPS65138ADRCR achieves θJA = 54.7 °C/W and supports 300 mA continuous output per rail at +85 °C ambient. Thermal shutdown triggers at 145 °C junction temperature with 10 °C hysteresis, and TI recommends minimum 100 mm² copper pour under the thermal pad per SLUA271 guidelines.

Is TPS65138ADRCR pin-compatible with TPS65138DRCR?

Yes, TPS65138ADRCR is fully pin-compatible with TPS65138DRCR: identical 10-pin VSON (DRC) package, matching pinout, footprint, and electrical interface. The only functional difference is VNEG programming range (–5.2 V max for TPS65138ADRCR vs –6.2 V for TPS65138DRCR); no PCB redesign is required when substituting between these variants.