NXP Semiconductors TDA3606AT/N1,118

Overview

TDA3606AT/N1,118 from NXP Semiconductors (formerly Philips) is a multiple-voltage regulator IC with integrated battery detection and dual reset outputs, designed for automotive microprocessor power management. It delivers a stable 5.0 V ±2% output at up to 150 mA, operates across −18 V to +50 V supply range, features load dump protection, and enables controlled microprocessor startup in car radio systems.

For engineers reviewing the TDA3606AT/N1,118 datasheet, TDA3606AT/N1,118 pinout, TDA3606AT/N1,118 application, or TDA3606AT/N1,118 equivalent, key selection criteria include its 7.6 V turn-on threshold, 2.4 V regulator shutdown point, dual Schmitt-triggered reset outputs with external delay capacitor control, and reverse-polarity safety down to −18 V.

Technical Context

The TDA3606AT/N1,118 integrates a foldback-current-limited 5 V linear regulator, two independent reset outputs (RES1 with internal 4.7 kΩ pull-up, RES2 gated by regulator voltage), and three dedicated Schmitt-trigger comparators-for VP startup/shutdown, battery input monitoring (VI(bat)), and regulator output validation (VREG). All outputs remain functional during load dump transients up to 50 V for 50 ms.

Its thermal design relies on SO20 package pins 1–3, 8–13, and 18–20 as heat spreaders (n.c.), achieving R_th(j-p) = 20 K/W. The device uses an external timing capacitor at VC (pin 6) to set reset delay, and includes ESD protection on all pins plus DC short-circuit safety to ground and VP.

Key Specifications

Pinout & Package

Package: SO20 (SOT163-1), plastic small outline, 20 leads, 7.5 mm body width; pins 1–3, 8–13, and 18–20 serve as thermal heat spreaders (n.c.).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL7705ACDR and MAX6326US31D3+, the TDA3606AT/N1,118 uniquely integrates regulation, dual reset, and battery detection in one SO20 package with full load dump resilience-reducing BOM count and PCB area in space-constrained automotive ECUs.

Availability

TDA3606AT/N1,118 is available at Aetrix Electronics and suitable for car audio systems, body control modules, instrument clusters, and telematics control units requiring stable component supply across extended temperature and voltage stress conditions.

Supply support for TDA3606AT/N1,118 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 deep expertise in high-reliability analog and mixed-signal ICs.

The TDA3606AT/N1,118 belongs to NXP's legacy automotive power management portfolio, engineered specifically for 12 V vehicle systems needing integrated regulation, reset, and battery interface functions without external components.

FAQ

What is the minimum supply voltage required for the TDA3606AT/N1,118 to enable its regulator output?

The TDA3606AT/N1,118 regulator switches on when the VP supply voltage exceeds 7.6 V (typical), with a hysteresis of 5.1 V ensuring stable turn-on. Below this threshold, the REG output remains off and both RES1 and RES2 stay LOW. This behavior prevents erratic MCU operation during low-battery cranking. The TDA3606AT/N1,118 maintains this defined startup behavior across −40 °C to +85 °C ambient temperatures.

How does the TDA3606AT/N1,118 handle load dump transients, and what protection mechanisms are built-in?

The TDA3606AT/N1,118 withstands load dump pulses up to 50 V for 50 ms without external protection, thanks to internal clamp structures and foldback current limiting on the REG output. Its VP pin is rated for −18 V reverse polarity, and all outputs remain functional during the transient. The TDA3606AT/N1,118 continues regulating and asserting reset signals throughout the event, ensuring uninterrupted MCU supervision. No external TVS diode is required for compliance with ISO 7637-2 Pulse 5a.

Can the TDA3606AT/N1,118 be used in systems requiring battery voltage monitoring without a microcontroller ADC?

Yes-the TDA3606AT/N1,118 provides dedicated VI(bat) and VO(bat) pins for battery presence detection. When VI(bat) exceeds 2.05 V (rising threshold), VO(bat) goes HIGH; it falls LOW when VI(bat) drops below 1.95 V. This Schmitt-triggered logic-level output eliminates the need for MCU ADC sampling or external comparators. The TDA3606AT/N1,118 thus enables simple, low-cost battery status signaling in resource-constrained automotive modules.

What is the purpose of the dual reset outputs (RES1 and RES2) in the TDA3606AT/N1,118, and how do they differ?

RES1 provides a standard power-on reset with internal 4.7 kΩ pull-up, asserting HIGH after the VC capacitor delay once the regulator is enabled. RES2 is gated-it only goes HIGH when the REG output voltage exceeds 4.45 V, confirming regulator stability before releasing the MCU. This two-stage reset prevents execution on marginal VREG. In the TDA3606AT/N1,118, RES2 cannot assert unless RES1 is already HIGH, enforcing strict sequencing integrity.

Is the TDA3606AT/N1,118 compatible with standard SO20 reflow soldering processes, and what thermal considerations apply?

Yes-the TDA3606AT/N1,118 in SO20 (SOT163-1) package is qualified for reflow soldering with peak temperatures of 215–250 °C and dwell times of 50–300 seconds. Its thermal design leverages pins 1–3, 8–13, and 18–20 as heat spreaders, achieving R_th(j-p) = 20 K/W. For continuous 150 mA operation at 85 °C ambient, derating to 138 mA is required per the thermal equation in the datasheet. The TDA3606AT/N1,118 must be mounted on PCB copper areas connected to these n.c. pins for optimal thermal performance.