Infineon Technologies IRS9100CXTSA1

Overview

IRS9100CXTSA1 from Infineon Technologies is a high-speed laser diode driver IC designed for indirect Time-of-Flight (iToF) image sensor illumination systems. It delivers up to 6 A peak current to VCSELs or LEDs, achieves <0.8 ns rise/fall times, features <60 mΩ on-resistance, and integrates LVDS input monitoring, thermal shutdown (>155 °C), and under-voltage lockout (2.2 V typ) in a TSNP-10-4 package.

For engineers reviewing the IRS9100CXTSA1 datasheet, IRS9100CXTSA1 pinout, IRS9100CXTSA1 application, or IRS9100CXTSA1 equivalent, key selection criteria include fast optical pulse fidelity (<0.8 ns edge control), integrated safety timing (3.75 µs ON-time limit), LVDS-compatible modulation interface, and compatibility with REAL3™ iToF sensors in mobile AR/VR and robotics LDS systems.

Technical Context

The IRS9100CXTSA1 implements a low-side NMOS gate driver architecture with integrated clamping protection (14 V max transient clamp), enabling direct connection to laser diode cathodes. Its LVDS input stage supports 10–150 MHz modulation frequencies with 100 mV differential threshold and 25 mV hysteresis, ensuring robust noise immunity in high-speed illumination control loops.

Three operational modes-Power Down (EN = low), Idle (EN = high + static LVDS low), and Active (EN = high + dynamic LVDS)-are managed by internal state logic that enforces a 3.75 µs maximum ON-time safety timeout. Thermal shutdown releases at 140 °C (typ), and under-voltage detection triggers below 2.2 V (typ) on VDD.

Key Specifications

Pinout & Package

IRS9100CXTSA1 is housed in a TSNP-10-4 package (1.1 × 1.5 × 0.37 mm), featuring three VSS pins (2, 7, 8) for low-inductance ground return, dual LD pins (1, 9, 10) for parallel cathode connection, and dedicated LVDS differential inputs (ON_P/ON_N) with EN enable control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DRV595RGER and NCP51530DR2G, IRS9100CXTSA1 uniquely integrates LVDS reception, sub-nanosecond edge control, and hardware-enforced safety timing in a 1.1 mm × 1.5 mm package - reducing total solution size by >60% and eliminating four external components required by alternatives.

Availability

IRS9100CXTSA1 is available at Aetrix Electronics and suitable for mobile AR/VR depth sensing, robotics LDS modules, and smart home security cameras requiring stable component supply, RoHS-compliant packaging, and qualified automotive-grade reliability per JEDEC20/22 test conditions.

Supply support for IRS9100CXTSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, sensor solutions, and automotive electronics, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949 standards.

The IRS9100CXTSA1 belongs to Infineon's REAL3™ laser driver product line, engineered specifically to support high-accuracy indirect Time-of-Flight imaging systems in consumer and industrial 3D sensing applications.

FAQ

Does IRS9100CXTSA1 support direct connection to VCSEL anodes?

No. IRS9100CXTSA1 is a low-side laser driver: its LD pins connect exclusively to the cathode of the laser diode. The VCSEL anode must be connected to the positive supply rail (e.g., VDD or a higher bias voltage). This architecture simplifies thermal management and enables precise current sinking during fast turn-off.

What is the purpose of the three LD pins (1, 9, 10) and three VSS pins (2, 7, 8)?

The three LD and three VSS pins provide parallel current paths to reduce package and PCB trace inductance. This layout preserves <0.8 ns rise/fall times under 6 A load conditions and minimizes ground bounce that could destabilize LVDS input thresholds or cause false triggering in high-density layouts.

Can IRS9100CXTSA1 be used with non-REAL3™ iToF sensors?

Yes. While optimized for Infineon's REAL3™ family, IRS9100CXTSA1 functions with any iToF or dToF sensor providing LVDS-compatible modulation signals (10–150 MHz, 100 mV differential swing). Its 2.5–3.7 V supply range and 3.75 µs safety timeout make it compatible with third-party ToF ASICs requiring robust, integrated laser drive.

How does the 3.75 µs ON-time safety timeout interact with EN and LVDS signals?

The timeout is triggered only during Active mode (EN = high + valid LVDS toggling). It resets on each rising edge of the LVDS signal and forces LD disable if no new edge occurs within 3.75 µs. This prevents latch-up due to frozen LVDS data while allowing continuous 150 MHz operation - unlike EN-based shutdown, which introduces 5 µs startup delay.