Infineon Technologies TLF2931GV50

Overview

TLF2931GV50 from Infineon Technologies is an AEC-Q100 qualified automotive-grade low-dropout linear voltage regulator delivering a fixed 5.0 V output with ≤100 mA load capability, dropout voltage as low as 50 mV at 10 mA, quiescent current ≤1 mA, and reverse battery protection. It serves as the primary standby power supply in vehicle body control modules requiring ultra-low static current and robust fault tolerance.

For engineers reviewing the TLF2931GV50 datasheet, TLF2931GV50 pinout, TLF2931GV50 application, or TLF2931GV50 equivalent, key selection criteria include its 5 V fixed output accuracy (±5% over temperature), 0.05–0.2 V dropout range, PG-DSO-8 thermal performance (R_thJA = 96 K/W), reverse polarity survival to −30 V, and mirror-image insertion immunity.

Technical Context

The TLF2931GV50 integrates bandgap reference, error amplifier, saturation control, and thermal shutdown circuitry in a single monolithic IC. Its architecture enables stable regulation under wide input variation (6–28 V) while maintaining <500 µV_rms output noise (100 Hz–10 kHz) and 80 dB ripple rejection at 120 Hz.

Protection logic includes foldback current limiting triggered at ~150 mA, thermal shutdown activation at T_j ≥ 150 °C (hysteresis ~15 °C), and internal clamp diodes enabling reverse-battery survival down to −30 V without external components.

Key Specifications

Pinout & Package

TLF2931GV50 is housed in a PG-DSO-8 surface-mount package (8-pin, exposed thermal pad, RoHS-compliant). The package supports reflow soldering per J-STD-020 and provides enhanced thermal dissipation via pins 2, 3, 6, and 7 tied to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO regulator applications.

Compared with TLV73350PDBVR and NCP1117ST50T3G, the TLF2931GV50 uniquely combines reverse-battery survival, mirror-insertion immunity, and AEC-Q100 qualification-making it the only choice for front-end power domains in OEM body electronics.

Availability

TLF2931GV50 is available at Aetrix Electronics and suitable for body control modules, door modules, instrument clusters, and telematics control units requiring stable component supply across extended automotive product lifecycles.

Supply support for TLF2931GV50 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, automotive ICs, and security solutions, with global manufacturing and automotive qualification infrastructure.

The TLF2931 series belongs to Infineon's automotive linear regulator product line, engineered specifically for low-power, high-reliability standby domains in 12 V vehicle electrical systems.

FAQ

What is the minimum input voltage required for regulation at full 100 mA load?

The TLF2931GV50 maintains regulation down to VI = VOUT + VDR = 5.0 V + 0.6 V = 5.6 V at 100 mA load, per datasheet Section 5.1.11–5.1.12. Input must remain ≥6 V across temperature and tolerance to ensure margin; operation below 6 V risks dropout and output collapse.

Can the TLF2931GV50 replace a 3.3 V regulator in the same footprint?

No-the TLF2931GV50 is a fixed 5.0 V device and is not pin-compatible with 3.3 V variants like TLF2931GV33. Although both use PG-DSO-8, their output voltage is laser-trimmed during test and cannot be altered; substituting without circuit redesign will overvoltage downstream 3.3 V logic.

Is an input capacitor mandatory for stable operation?

Yes-an input capacitor of ≥100 nF ceramic is required between IN (pin 8) and GND (pins 2/3/6/7) per datasheet Figure 2 layout recommendation. It suppresses high-frequency noise from upstream converters and prevents oscillation during fast load transients.

Does the TLF2931GV50 support adjustable output voltage via external resistors?

No-it is a fixed-output regulator with internal feedback divider. The "GV50" suffix denotes factory-trimmed 5.0 V output; no external resistor network can modify the setpoint. For adjustable versions, consider Infineon's TLF2931-ADJ family, which uses different pinout and package marking.