Infineon Technologies TLE6363G

Overview

TLE6363G from Infineon is a multifunctional automotive power management IC integrating a 24–31 V boost converter, a 5.0 V ±2% buck regulator (250 mA), digital window watchdog, power-on/off reset generator, and system enable output - all in a single P-DSO-14-2 package for engine control units and body electronics.

For engineers reviewing the TLE6363G datasheet, TLE6363G pinout, TLE6363G application, or TLE6363G equivalent, key selection criteria include its dual-converter architecture, integrated watchdog timing window, over/under-voltage lockout thresholds (e.g., VBOOST UVON = 4.5 V, OVON = 33 V), and -40 °C to 125 °C ambient operation range.

Technical Context

The TLE6363G implements two independent switching regulators: a boost stage with programmable output (24–31 V typ.) using external feedback at BOFB and internal 2.7 V reference, and a synchronous buck stage delivering regulated 5.0 V ±2% at up to 250 mA with short-circuit protection and 0.5 Ω typical R_BUON. Both converters feature hysteresis-based UV/OV lockout with distinct turn-on/turn-off thresholds.

Its digital window watchdog monitors WDI pulse timing (programmable via external resistor R_R), asserts SEN on timeout/fault, and integrates with RO (open-drain reset) and OVL (boost status) for coordinated system supervision - all operating under SPT® technology enabling bipolar-CMOS-DMOS co-integration on one die.

Key Specifications

Pinout & Package

P-DSO-14-2: 14-lead plastic dual small-outline package with exposed thermal pad, optimized for automotive PCB layout and thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multifunctional automotive power management applications.

Compared with TLF35584QVVS1 and MAX16922ATP+, the TLE6363G offers optimal balance of integration (dual converters + watchdog + reset), automotive qualification (-40 °C to 125 °C), and minimal external component count - making it ideal for cost-sensitive, non-ASIL ECU designs where robustness and simplicity are prioritized.

Availability

TLE6363G is available at Aetrix Electronics and suitable for engine control units, body control modules, transmission control units, and ADAS camera ECUs requiring stable component supply across automotive production lifecycles.

Supply support for TLE6363G 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 industrial control solutions, with leadership in high-reliability analog and mixed-signal devices.

The TLE6363G belongs to Infineon's TLE automotive power system family, designed specifically for integrated power supply and supervision in engine, transmission, and chassis control units operating under harsh electrical and thermal conditions.

FAQ

What is the recommended external resistor value for configuring the watchdog window?

The datasheet specifies a 47 kΩ resistor between pin R and GND for standard operation, setting the watchdog window to approximately 1.2 seconds. This value is confirmed in the Electrical Characteristics table under test condition "RR = 47 kΩ" and aligns with typical ECU reset timing requirements. Deviations require recalculation using the oscillator frequency formula provided in Section 3.2.

How does the TLE6363G handle battery voltage transients such as load dump?

The TLE6363G withstands load dump transients up to 46 V on VBOI and VBOOST pins, per Absolute Maximum Ratings. Its boost OV lockout activates at 37 V (rising), disabling the boost stage before damage occurs, and re-enables at 33 V (falling) once voltage stabilizes - ensuring graceful recovery without latch-up or manual reset.

Can the buck and boost converters operate independently?

No - the buck converter requires VBOOST ≥ 5 V to function, as VBOOST supplies both the buck driver stage (BDS) and the buck power switch. If VBOOST drops below 4.5 V (UV lockout), the buck stage shuts down. The boost stage, however, operates independently down to VBOI = –0.3 V, enabling start-stop functionality during cranking.

Is an external bootstrap capacitor required for the buck stage?

No - the TLE6363G integrates internal charge pump circuitry for the buck high-side gate driver. Pin BDS is supplied directly from VBOOST, eliminating the need for external bootstrap components. This simplifies layout and improves reliability compared to discrete buck controllers requiring external bootstrap networks.