NXP Semiconductors TDA3606T/N1,112

Overview

TDA3606T/N1,112 from NXP Semiconductors (formerly Philips) is a monolithic multiple-voltage regulator IC with integrated battery detection, reset generation, and load dump protection-designed for automotive microprocessor power management in car radio systems. It delivers a stable 5.0 V ±2% output at up to 50 mA, operates across −18 V to +50 V supply range, and features dual Schmitt-triggered reset outputs (RES1/RES2) with programmable delay via external capacitor.

For engineers reviewing the TDA3606T/N1,112 datasheet, TDA3606T/N1,112 pinout, TDA3606T/N1,112 application, or TDA3606T/N1,112 equivalent, this page provides verified technical context, exact pin functions, real-world automotive use cases, and validated alternative options for microcontroller power sequencing and battery-status monitoring under harsh electrical conditions.

Technical Context

The TDA3606T/N1,112 integrates a foldback-current-limited 5 V linear regulator, two independent reset outputs with hysteresis, and a battery-detection buffer-all sharing a single VP supply input capable of surviving 50 V/50 ms load dump pulses and −18 V reverse polarity. Its start-up behavior is defined by a 7.5 V rising threshold and 2.4 V falling threshold on VP, ensuring controlled microprocessor initialization.

Each output (REG, RES1, RES2, VO(bat)) includes ESD protection and short-circuit safety; RES1 uses a 4.7 kΩ internal pull-up and activates after VC-delay, while RES2 asserts only when REG output remains within 4.35–4.6 V-providing voltage-valid confirmation. The device operates from −40 °C to +85 °C ambient and dissipates ≤0.81 W at 25 °C.

Key Specifications

Pinout & Package

Package: SO8 (SOT96-1), plastic small outline, 8-lead, 3.9 mm body width, lead pitch 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL7705ACDR and MAX6326US29D3+T, the TDA3606T/N1,112 uniquely integrates regulator, dual reset, and battery detection in one SO8 package rated for direct 12 V battery connection-making it irreplaceable for cost-sensitive, space-constrained automotive MCU power solutions requiring full electrical robustness.

Availability

TDA3606T/N1,112 is available at Aetrix Electronics and suitable for automotive infotainment, telematics modules, aftermarket audio systems, and vehicle control units requiring stable component supply under extended temperature and harsh electrical environments.

Supply support for TDA3606T/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 leader focused on automotive, industrial, and IoT applications, with heritage in Philips' analog and power management IC design.

The TDA3606T/N1,112 belongs to NXP's legacy automotive power management portfolio, engineered specifically for robust microprocessor power sequencing in 12 V vehicle electrical systems-including load dump, reverse battery, and wide-temperature operation.

FAQ

What is the minimum supply voltage required for the TDA3606T/N1,112 to activate its regulator output?

The TDA3606T/N1,112 regulator switches on when the VP supply voltage exceeds 7.5 V (typical), with a guaranteed turn-on threshold between 6.2 V and 8.2 V. Below 5.6 V, the device remains inactive and draws only standby quiescent current. This ensures reliable startup after engine cranking, where battery voltage may dip transiently.

How does the TDA3606T/N1,112 handle load dump events, and what protection mechanisms are built in?

The TDA3606T/N1,112 withstands 50 V load dump pulses for 50 ms (with rise time ≥2.5 ms) without damage or functional interruption. It achieves this through internal clamp structures, foldback current limiting on the REG output, and ESD protection on all pins-enabling direct connection to the vehicle battery rail without external TVS diodes in many designs.

Can the TDA3606T/N1,112 be used in systems requiring a 3.3 V output instead of 5 V?

No-the TDA3606T/N1,112 provides only a fixed 5.0 V output (4.8–5.2 V). It does not support adjustable or 3.3 V regulation. For 3.3 V applications, an external LDO or DC-DC converter must be used downstream of the TDA3606T/N1,112's REG output, with appropriate derating for power dissipation.

What is the function of the VO(bat) output on pin 2 of the TDA3606T/N1,112, and how is it electrically characterized?

The VO(bat) output on pin 2 of the TDA3606T/N1,112 is a buffered, open-drain logic signal that goes HIGH when the battery input voltage VI(bat) exceeds 2.05 V (rising threshold). It sources ≤1 mA at VOH ≥5.0 V and sinks ≥0.2 mA at VOL ≤0.8 V-enabling direct interface to MCU GPIO or discrete logic for battery-presence detection.

Is the TDA3606T/N1,112 pin-compatible with newer NXP automotive regulators such as the TDA3664 or UJA1069?

No-the TDA3606T/N1,112 is not pin-compatible with TDA3664 or UJA1069. Those devices use different pinouts, feature sets (e.g., CAN interface, LIN transceiver), and voltage configurations. Migration requires PCB layout revision and firmware adaptation; the TDA3606T/N1,112 remains a standalone solution for legacy 5 V microprocessor power with battery detection.