NXP Semiconductors TDA3617J/N1,112

Overview

TDA3617J/N1,112 from NXP Semiconductors (formerly Philips) is a triple-output automotive-grade voltage regulator IC with independent enable control for each regulator, delivering fixed 9.0 V/1.3 A, 5.0 V/600 mA, and 3.3 V/300 mA outputs. It features load dump protection up to 50 V, reverse polarity safety down to −18 V, and open-collector HOLD output for microprocessor interface in engine control units and body electronics.

For engineers reviewing the TDA3617J/N1,112 datasheet, TDA3617J/N1,112 pinout, TDA3617J/N1,112 application, or TDA3617J/N1,112 equivalent, key selection criteria include its triple-regulator architecture with foldback current limiting, VP supply range (−18 V to +50 V), thermal protection, and Schmitt-triggered enable inputs with hysteresis for battery voltage monitoring.

Technical Context

The TDA3617J/N1,112 integrates three independent linear regulators with dedicated enable pins (Ven1, Ven2, Ven3), each featuring foldback current limiting and individual out-of-regulation detection feeding a shared open-collector HOLD output. Its VP supply input withstands automotive transients including load dump (50 V/50 ms) and reverse battery (−18 V).

Regulator 1 operates at 9.0 V ±5% with 1.3 A current limit and 0.5–1.0 V dropout; Regulator 2 delivers 5.0 V ±5% at 600 mA with 1.0–1.5 V dropout; Regulator 3 provides 3.3 V ±5% at 300 mA. All regulators include short-circuit protection, thermal shutdown, and >60 dB ripple rejection at 3 kHz.

Key Specifications

Pinout & Package

Package: DBS9P - plastic DIL-bent-SIL power package with 9 leads (lead length 12 mm), SOT157-2 variant, designed for through-hole mounting and high-power dissipation (R_th(j-c) = 2 K/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-output automotive voltage regulator applications.

Compared with NCP1022DR2G and TPS7H3301-SP, the TDA3617J/N1,112 uniquely combines triple-rail regulation, automotive-grade transient protection, and system-level HOLD signaling in a single DBS9P package-enabling full ECU power management without supplemental ICs or protection circuitry.

Availability

TDA3617J/N1,112 is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply across automotive production lifecycles.

Supply support for TDA3617J/N1,112 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

NXP Semiconductors is a global semiconductor company formed from Philips' semiconductor division, specializing in automotive, industrial, and IoT solutions with emphasis on functional safety and reliability.

The TDA3617J/N1,112 belongs to NXP's automotive power management product line, designed specifically for centralized voltage regulation in engine, transmission, and body electronics where robustness against battery transients and reverse polarity is mandatory.

FAQ

What is the maximum load dump voltage the TDA3617J/N1,112 can withstand?

The TDA3617J/N1,112 withstands load dump transients up to 50 V for 50 ms with rise time ≥2.5 ms, automatically disabling regulators when VP exceeds 20 V. This meets ISO 7637-2 Pulse 5a requirements for 12 V automotive systems without external clamping components. The device resumes normal operation once VP falls below the hysteresis threshold.

Does the TDA3617J/N1,112 support reverse battery connection?

Yes, the TDA3617J/N1,112 is reverse polarity safe down to −18 V at the VP pin with no high reverse current flow, eliminating the need for an external series protection diode. This feature reduces power loss and thermal stress in vehicle battery disconnect/reconnect scenarios, directly supporting ISO 16750-2 Section 4.8 requirements.

How does the HOLD output function in the TDA3617J/N1,112?

The HOLD output of the TDA3617J/N1,112 is an open-collector signal that goes LOW when any of the three regulators is out-of-regulation or when at least one enable input is HIGH and its corresponding output is unstable. When all enable inputs are LOW (standby), HOLD enters high-impedance state, allowing wired-OR connection with other regulators like TDA3618 for system-level power-good monitoring.

What are the dropout voltages for each regulator in the TDA3617J/N1,112?

Regulator 1 has a dropout voltage of 0.5–1.0 V at 1.3 A; Regulator 2 has 1.0–1.5 V at 600 mA with VP = 6 V; Regulator 3 does not specify a dropout value but maintains regulation down to VP = 5 V. These values define minimum VP headroom required to sustain nominal output under full load, critical for cold-crank operation where VP may dip to 6 V.

Can the TDA3617J/N1,112 be used in systems requiring functional safety compliance?

The TDA3617J/N1,112 includes multiple safety features relevant to ASIL-B systems: thermal shutdown at 175 °C, foldback current limiting, reverse polarity protection, and out-of-regulation detection via HOLD. While it lacks formal ASIL certification documentation, its design aligns with failure-mitigation strategies for power supply monitoring in automotive ECUs per ISO 26262 Part 5 Annex D.