NXP Semiconductors TDA3616SF/N1,112

Overview

TDA3616SF/N1,112 from NXP Semiconductors (formerly Philips) is a monolithic multiple-voltage regulator IC with integrated battery detection, load dump protection, and dual reset outputs-designed for automotive microprocessor power supply in car radio systems. It delivers a stable 5.0 V ±2.5% output at up to 150 mA, operates across −18 V to +50 V supply range, and maintains regulation during 50 ms/50 V load dump pulses.

For engineers reviewing the TDA3616SF/N1,112 datasheet, TDA3616SF/N1,112 pinout, TDA3616SF/N1,112 application, or TDA3616SF/N1,112 equivalent, key selection criteria include its VP-state-controlled startup (7.5 V turn-on), dual Schmitt-triggered reset outputs with adjustable delay, reverse polarity safety down to −18 V, foldback current limiting, and SIL9MP package thermal performance (R_th(j-p) = 12 K/W).

Technical Context

The TDA3616SF/N1,112 integrates a low-dropout linear regulator with built-in backup switch, battery voltage monitoring via dedicated VI(bat)/VO(bat) pins, and two synchronized reset outputs (RES1 and RES2) triggered by an internal bandgap reference shared with the regulator-ensuring voltage tracking within ±65 mV. Its VP input withstands jump-start (30 V/10 min) and load dump (50 V/50 ms) transients without shutdown.

Startup behavior is defined by a hysteresis Schmitt trigger (7.5 V rise, 2.4 V fall) on VP, while reset timing is externally programmable via capacitor on VC pin (2.6 ms typical with 100 nF). The IC uses a single bandgap reference for regulator, reset thresholds, and battery detection-enabling correlated voltage tracking and predictable sequencing during brownout.

Key Specifications

Pinout & Package

SOT110-1 (SIL9MP): plastic single in-line medium power package with fin; 9 leads; body length 21.4 mm, width 6.2 mm, height 3.4 mm; thermal pad connected to pins 1, 10, 11, 20 (i.c.) for heatsinking.

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 TDA3616SF/N1,112 uniquely integrates regulator, dual reset, battery detection, and 50 V load dump survival in one SIL9MP package-eliminating need for 3+ discrete ICs and external protection circuitry in automotive power sequencing.

Availability

TDA3616SF/N1,112 is available at Aetrix Electronics and suitable for automotive infotainment, telematics control units, and engine management auxiliary supply requiring stable component supply across extended temperature and harsh electrical environments.

Supply support for TDA3616SF/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 deep heritage in automotive analog power management from its Philips Semiconductors roots.

The TDA3616SF/N1,112 belongs to NXP's legacy automotive voltage regulator family, designed specifically for cost-sensitive, high-reliability car radio and infotainment power systems requiring integrated reset, battery monitoring, and transient resilience.

FAQ

What is the minimum supply voltage required to activate the regulator in TDA3616SF/N1,112?

The TDA3616SF/N1,112 regulator switches on only when the VP supply voltage exceeds 7.5 V (rising threshold), with hysteresis ensuring it remains on until VP drops below 2.4 V. This behavior is defined by an internal Schmitt trigger and applies regardless of load or temperature-ensuring clean startup in automotive battery systems where voltage ramps slowly after ignition.

How does the TDA3616SF/N1,112 handle load dump events, and what protection features are active during such transients?

During load dump (≤50 ms, ≤50 V), the TDA3616SF/N1,112 continues regulating its 5.0 V output, keeps both RES1 and RES2 active, and maintains full battery detection functionality on VI(bat)/VO(bat). Its internal foldback current limit, DC short-circuit safety, and 50 V-rated VP pin ensure uninterrupted operation without latch-up or damage-critical for automotive alternator disconnect scenarios.

Can the reset delay time of the TDA3616SF/N1,112 be adjusted, and what capacitor value yields a 5 ms delay?

Yes-the reset delay is set by an external capacitor on the VC pin. Using the formula t_d = R_pu(int) × C_d × ln[(V_REG − V_th(r))/(V_REG − V_th(f))], a 5 ms delay requires ≈190 nF (based on typical 47 kΩ internal resistor and 5.0 V regulator output). The datasheet confirms 100 nF gives 2.6 ms, so scaling linearly yields ~190 nF for 5 ms.

What is the purpose of the BU (backup) pin on the TDA3616SF/N1,112, and what capacitor value is recommended?

The BU pin connects to an external backup capacitor that sustains the TDA3616SF/N1,112's regulator and reset outputs during main supply loss. A minimum of 150 nF is required for stability, but typical designs use ≥1000 µF to extend hold-up time-enabling the microcontroller to save state or initiate safe shutdown before power collapse.

Does the TDA3616SF/N1,112 support reverse battery connection, and what is its safe reverse voltage limit?

Yes-the TDA3616SF/N1,112 is reverse polarity safe down to −18 V on the VP pin without drawing excessive reverse current. This eliminates the need for an external series diode in battery-reversal-prone automotive installations, reducing voltage drop and heat generation while maintaining full functionality during reverse connection.