STMicroelectronics STP16CPS05PTR

Overview

STP16CPS05PTR from STMicroelectronics is a 16-bit constant-current LED sink driver in QSOP-24 package, designed for serially controlled LED panel displays. It delivers precise 5–100 mA per channel with ±1.5% typical current matching between outputs, supports 30 MHz clock input, and features auto power-saving that reduces quiescent current to 120–200 μA when latched data is inactive - enabling energy-efficient signage and industrial status indicators.

For engineers reviewing the STP16CPS05PTR datasheet, STP16CPS05PTR pinout, STP16CPS05PTR application, or STP16CPS05PTR equivalent, key selection criteria include output current adjustability via R-EXT (e.g., 20 mA @ 970 Ω), 20 V output voltage capability for multi-LED series strings, 40 ns typical current setup time, and compatibility with 3.3 V microcontrollers without level shifting.

Technical Context

The device integrates a 16-bit serial-in/parallel-out shift register cascaded with a 16-bit D-type storage latch, enabling synchronous data loading and independent output enable control. Its output stage comprises sixteen matched, thermally stable current sources with programmable full-scale range via single external resistor (R-EXT).

Auto power management operates autonomously: the IC enters shutdown mode when no new data is latched, reducing supply current by >98% versus active operation; it resumes normal drive within one clock cycle upon detection of valid latch activity - eliminating need for host-side power sequencing logic.

Key Specifications

Pinout & Package

STP16CPS05PTR is housed in a 24-pin QSOP (Quarter-Shrink Small Outline Package) with 0.635 mm pitch, 8.56–8.76 mm body length, and 5.80–6.20 mm width. The exposed pad variant is not used in this order code; thermal resistance is 55 °C/W (junction-to-ambient).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59283RTJR and MAX7219CWG+, STP16CPS05PTR offers unique R-EXT-based current tuning and autonomous power gating - making it optimal for scalable, low-quiescent LED systems where per-channel flexibility and energy efficiency are design-critical.

Availability

STP16CPS05PTR is available at Aetrix Electronics and suitable for architectural signage, industrial HMIs, automotive interior lighting, and test equipment front panels requiring stable component supply and long-term manufacturing continuity.

Supply support for STP16CPS05PTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.

The STP16CPS05 belongs to ST's LED driver product line, engineered specifically for high-accuracy, low-voltage constant-current sinking in serially controlled display and indication systems - emphasizing thermal stability, current matching, and system-level power efficiency.

FAQ

What is the minimum supply voltage required for reliable operation of STP16CPS05PTR?

The STP16CPS05PTR operates reliably from 3.0 V to 5.5 V. At 3.0 V, it maintains full functionality including 30 MHz clock support, 5–100 mA output current range, and auto power-saving activation. Output voltage compliance remains at 20 V regardless of VDD, enabling consistent LED string drive across the entire supply range.

How does the auto power-saving feature behave during intermittent data transmission?

The IC monitors latch activity: if no rising edge is detected on the LE pin for >100 µs (typ.), it enters shutdown mode, reducing supply current to 120–200 μA. Upon the next LE high pulse, it wakes instantly - output current stabilizes within 40 ns, with no reset or initialization delay required.

Can STP16CPS05PTR drive multiple LEDs in series per channel, and what limits the maximum count?

Yes - each OUTx channel supports up to 20 V output compliance. With typical white LEDs at 3.2 V VF, up to six can be driven in series per channel. The limit is determined solely by VO(max) = 20 V minus total forward voltage and any series resistor drop; no internal voltage boosting is used.

Is the QSOP-24 package of STP16CPS05PTR RoHS-compliant and lead-free?

Yes - STP16CPS05PTR is manufactured in ST's ECOPACK®-compliant QSOP-24 package, meeting RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 (MSL3). Full environmental compliance documentation is available via ST's official product page under ECOPACK® grade "ECOPACK2".