Texas Instruments TPS65137ASDSCR

Overview

TPS65137ASDSCR from Texas Instruments is a dual-output AMOLED display power supply IC integrating a boost converter with LDO post-regulator (VPOS = 4.6 V / 250 mA) and an inverting buck-boost converter (VNEG = –4.9 V / 250 mA default), operating from 2.5 V to 4.8 V input, designed for battery-powered mobile displays.

For engineers reviewing the TPS65137ASDSCR datasheet, TPS65137ASDSCR pinout, TPS65137ASDSCR application, or TPS65137ASDSCR equivalent, key selection criteria include digitally programmable negative output (–2.2 V to –5.2 V), 0.8% VPOS voltage accuracy, short-circuit protection with latched shutdown, thermal shutdown at 145°C, and 3 mm × 3 mm 10-pin WSON package with exposed thermal pad.

Technical Context

The TPS65137ASDSCR implements two independent switching regulators: a boost stage feeding an LDO to generate stable 4.6 V positive rail, and a synchronous inverting buck-boost stage generating programmable negative rail. Its CTRL pin serves dual function-enable control and 6-bit digital programming of VNEG via pulse-counting interface.

Transition time of VNEG is externally adjustable via CT pin capacitor (RC time constant with ~325 kΩ internal impedance); soft-start limits inrush current; short-circuit detection uses voltage thresholds (VPOS < 3.7 V, VNEG deviation > 420 mV) with 3 ms timeout during operation and multi-stage validation during startup.

Key Specifications

Pinout & Package

TPS65137ASDSCR is housed in a 10-pin WSON (DSC) package with exposed thermal die pad (pin 11), requiring solder connection to PCB ground plane for thermal and electrical performance. Pin pitch is 0.5 mm; package outline conforms to JEDEC MO-229 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65137ASDSCR, TPS65136ASDSCR offers pin-compatible simplicity at the cost of VNEG flexibility, while MAX17135ETJ+ delivers broader voltage coverage and integration at the expense of footprint and design complexity - making TPS65137ASDSCR optimal for compact, programmable mobile AMOLED systems.

Availability

TPS65137ASDSCR is available at Aetrix Electronics and suitable for smartphone display power, tablet AMOLED bias supply, and wearable OLED power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS65137ASDSCR 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 architectures and mobile system-on-chip support.

The TPS65137ASDSCR belongs to TI's AMOLED Display Power Supply product line, engineered specifically for high-efficiency, space-constrained, battery-operated portable displays requiring precision dual-rail bias generation with programmable negative voltage.

FAQ

What is the default VNEG output voltage of the TPS65137ASDSCR?

The TPS65137ASDSCR defaults to –4.9 V on the VNEG output when powered up with CTRL held high and no programming pulses applied. This value is factory-trimmed and maintained across –40°C to 85°C ambient temperature, with ±1% regulation for –4.9 V output. The TPS65137ASDSCR achieves this using an internal 6-bit DAC referenced to its precision bandgap.

How does the CTRL pin function in the TPS65137ASDSCR?

The CTRL pin on the TPS65137ASDSCR serves two roles: it acts as an enable signal (HIGH = active, LOW = shutdown) and as a digital programming interface for VNEG. After enabling, each rising edge on CTRL increments the VNEG DAC code - 0 edges yields –4.9 V, 1 edge yields –5.2 V, and so on per Table 2 in the datasheet. The TPS65137ASDSCR validates pulse timing (t_HIGH, t_LOW, t_STORE) to reject noise.

What package type and thermal characteristics does the TPS65137ASDSCR use?

The TPS65137ASDSCR uses a 10-pin WSON (DSC) package measuring 3 mm × 3 mm × 0.8 mm with an exposed thermal pad (pin 11). Its thermal resistance is θ_JA = 56.5°C/W and θ_JB = 25.2°C/W, enabling reliable 250 mA dual-rail operation at 85°C ambient when the thermal pad is soldered to a ≥100 mm² copper pour. The TPS65137ASDSCR requires MSL Level-2 handling and peak reflow ≤260°C.

Does the TPS65137ASDSCR include short-circuit protection, and how does it behave?

Yes, the TPS65137ASDSCR includes latched short-circuit protection on both outputs. During operation, it detects VPOS falling below 3.7 V or VNEG exceeding its programmed value by >420 mV for >3 ms, then shuts down and latches. Recovery requires cycling VIN below UVLO (2.3 V) or toggling CTRL. Startup protection adds additional checks at 10 ms and 20 ms intervals. The TPS65137ASDSCR provides fail-safe behavior essential for display reliability.

Can the TPS65137ASDSCR operate from a single-cell lithium battery?

Yes, the TPS65137ASDSCR operates across 2.5 V to 4.8 V input, fully covering the discharge profile of a single-cell Li-ion or Li-poly battery (3.0 V–4.2 V nominal, down to 2.5 V cutoff). Its UVLO threshold (2.3 V rising) prevents malfunction during deep discharge, and its 1.6/1.7 MHz switching frequency maintains efficiency >85% at 2.9 V input with 250 mA load - confirmed in Figure 1 of the TPS65137ASDSCR datasheet.