Texas Instruments LP5560TMX/NOPB

Overview

LP5560TMX/NOPB from Texas Instruments is a programmable single-LED driver IC with high-side constant-current output, single-wire digital control interface, 40 mV typical headroom voltage, adjustable LED current (2.8–19.5 mA), and programmable blink sequences up to three pulses - used for indicator feedback in portable consumer electronics.

For engineers reviewing the LP5560TMX/NOPB datasheet, LP5560TMX/NOPB pinout, LP5560TMX/NOPB application, or LP5560TMX/NOPB equivalent, key selection considerations include ultra-low headroom operation enabling direct battery drive, volatile sequence programming via single-wire timing protocol, DSBGA-4 package constraints, and default factory blink behavior for systems lacking firmware control.

Technical Context

The LP5560TMX/NOPB integrates a precision high-side current source with digitally programmable rise/fall times (0–1584 ms in 105.6-ms steps), on/off timing (13.2–3009.6 ms and 26.4–6019.2 ms), and 7-step LED current setting (2.8–19.5 mA). Its single-wire interface uses calibrated pulse-width encoding with command entering/blank periods to avoid external clocking or address lines.

It operates from 2.7 V to 5.5 V, features internal bandgap reference and thermal shutdown (160°C trip), and stores sequences in volatile memory - resetting to default blink on power-up or CTRL-initiated reset. No external components are required for basic operation.

Key Specifications

Pinout & Package

LP5560TMX/NOPB is housed in a 0.886 mm × 0.886 mm, 0.4-mm pitch, 4-pin DSBGA (YFQ) package - optimized for space-constrained mobile PCBs with bottom-soldered interconnects.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver applications.

Compared with LP5560TMX/NOPB, LP55231RTER offers richer RGB sequencing but demands more board space and firmware overhead, while MAX77691EWL+T provides system-level integration at the expense of simplicity and minimal BOM for dedicated indicator use.

Availability

LP5560TMX/NOPB is available at Aetrix Electronics and suitable for smartphone status indicators, card reader feedback systems, and fuel dispenser interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LP5560TMX/NOPB 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, embedded processing, and power management technologies - serving automotive, industrial, and consumer markets with high-reliability silicon solutions.

The LP5560TMX/NOPB belongs to TI's LP55xx family of ultra-compact LED drivers designed specifically for low-power, space-constrained portable electronics requiring simple, robust visual feedback without MCU resource burden.

FAQ

What is the function of the CTRL pin on the LP5560TMX/NOPB?

The CTRL pin on the LP5560TMX/NOPB serves as the sole digital interface for mode control and sequence programming. It accepts calibrated pulse-width commands to execute Run, Training Start, Training End, or Run-Once operations. Its fixed VIH (1.1 V) and VIL (0.6 V) thresholds ensure compatibility with 1.8 V and 3.3 V microcontrollers without level shifting. The LP5560TMX/NOPB relies entirely on this pin for all configuration and execution - no clock, data, or address lines are required.

Does the LP5560TMX/NOPB require external components for basic operation?

No, the LP5560TMX/NOPB requires zero external components for fundamental LED driving and blinking functionality. Its internal current source, oscillator, and volatile memory eliminate the need for current-setting resistors, timing capacitors, or external clocks. A local 100-nF bypass capacitor on VDD is recommended per TI layout guidelines, but it is not mandatory for functional operation - making the LP5560TMX/NOPB one of the smallest complete LED driver solutions available.

How does the LP5560TMX/NOPB handle power-up and reset conditions?

At power-up, the LP5560TMX/NOPB performs a Power-On Reset (POR) that initializes all registers to factory defaults, including the pre-programmed blink sequence and default current setting (5.3 mA). If the CTRL pin is held high during POR, the device enters Run Mode immediately after initialization. The LP5560TMX/NOPB also supports software reset via a Training End command issued right after Training Start - restoring all settings to their power-on state without cycling VDD.

What is the significance of the 40 mV headroom voltage specification for the LP5560TMX/NOPB?

The 40 mV typical headroom voltage means the LP5560TMX/NOPB can maintain accurate LED current regulation even when the difference between VDD and LED forward voltage is as low as 40 mV. This enables direct drive of standard indicator LEDs (e.g., 2.0–3.4 V VF) from a 2.7 V minimum supply - eliminating the need for boost converters or LDOs in battery-powered systems. The LP5560TMX/NOPB sustains this performance across its full 2.8–19.5 mA current range and −30°C to +85°C operating temperature.

Can the LP5560TMX/NOPB be used with different LED forward voltages?

Yes, the LP5560TMX/NOPB supports LED forward voltages from 1.7 V to 3.4 V while maintaining regulated current, thanks to its low 40 mV headroom requirement. For example, with a 3.1 V LED and 3.6 V supply, the headroom is 500 mV - well above the 40 mV minimum. Even at 2.7 V supply and 2.5 V LED, headroom remains 200 mV. The LP5560TMX/NOPB's current accuracy (±10% over temperature) and load regulation (0.6%/V) ensure consistent brightness across diverse LED types without recalibration.