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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

NXP Semiconductors TDA3683SD/N2S,112

Name: TDA3683SD/N2S,112
Brand: NXP Semiconductors
SKU: TDA3683SD/N2S,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA3683SD/N2S,112

Manufacturer:: NXP Semiconductors

Category:: Power Management - Specialized

Package:: 23-SIP Formed Leads

Datasheet:: TDA3683SD/N2S,112.pdf

Description:: IC REG MULTIPLE VOLTAGE RDBS23P

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Product details

Overview

TDA3683SD/N2S,112 from NXP Semiconductors (formerly Philips) is a 23-pin automotive-grade multiple-output voltage regulator IC with integrated power switch and ignition buffer, designed for car radio power management. It delivers seven regulated outputs (5 V/600 mA, 3.3 V/200 mA, 1.9 V/150 mA, 8.5 V/350 mA, 5 V/1.8 A, 3.3 V/1.2 A, and adjustable 2.4–10 V/2 A), supports load dump protection up to 50 V, and operates across −40 °C to +150 °C junction temperature - enabling robust digital core, CAN bus, DSP, tuner, and display supply in automotive infotainment systems.

For engineers reviewing the TDA3683SD/N2S,112 datasheet, TDA3683SD/N2S,112 pinout, TDA3683SD/N2S,112 application, or TDA3683SD/N2S,112 equivalent, key selection considerations include its dual-supply architecture (VP1/VP2), three-mode operation (Sleep/Standby/On), hold output diagnostics, reset delay capacitor timing control, and RDBS23P package thermal performance for high-reliability automotive PCB layouts.

Technical Context

The TDA3683SD/N2S,112 integrates three enable-controlled standby regulators (REG1–REG3) and four mode-controlled switched regulators (REG4–REG7), each with foldback current protection and independent out-of-regulation detection (except REG7). Its ignition buffer provides inverted open-collector logic output with input transient protection and low-voltage latch for cold-crank reliability.

Operation is governed by three logic inputs: EN1 (REG1 only), EN2/3 (REG2/REG3 shared), and MODE (enables REG4–REG7 and PSW). The HOLD pin delivers 3-state diagnostic signaling (LOW/MID/HIGH) for thermal pre-warning, load dump, low-battery, or regulator fault conditions - with hysteresis on all Schmitt-triggered thresholds including VP1/VP2 (7.0 V rising / 4.5 V falling) and reset delay capacitors.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Count	7 regulated outputs + 1 power switch + 1 ignition buffer + 1 hold diagnostic output
Supply Voltage Range	VP1: 9–18 V operating; withstands 50 V load dump (t ≤50 ms) and −18 V reverse polarity
Quiescent Current	5 µA typical in Sleep mode; 300–450 µA in Standby mode with EN1/EN2/3 active
Thermal Protection	Thermal shutdown at T_j = +150 °C; thermal pre-warning at +140 °C signaled via HOLD MID-level
Reset Delay Timing	RDC1/RDC2/3 charge/discharge enables programmable reset pulse delay (e.g., 35 ms typ. with 47 nF)
Power Switch Rating	2.2 A continuous / 3 A surge; internal 16 V clamp; foldback current limiting with RDC1-based delay
Adjustable Output	REG7: 2.4–10 V via external resistor divider on ADJ7; includes built-in flyback clamp

Pinout & Package

RDBS23P plastic rectangular DIL-bent-SIL (reverse bent) power package with 23 leads, row spacing 2.54 mm, low thermal resistance (R_th(j-c) = 1 K/W), and heat tab internally connected to GND (pin 23).

Pin/Terminal	Circuit Role	Design Meaning
VP1 (1)	Main supply input	Primary battery connection; powers bandgaps, standby regulators, and ignition buffer; withstands 50 V load dump
IGNIN (2)	Ignition signal input	Inverting Schmitt-trigger input for crank detection; includes RC filter recommendation and negative spike protection
PSW (3)	Power switch output	2.2 A continuous switch for antenna/display/CD drives; 16 V internal clamp; foldback current limit with RDC1 timing
IGNOUT (4)	Ignition buffer output	Inverted open-collector output; pulls LOW during engine crank to mute audio amplifiers
HOLD (5)	Diagnostic status output	3-state output: LOW (no fault), MID (+140 °C pre-warning), HIGH (load dump, low VP1, or REG4–REG6 OOR)
MODE (6)	Switched regulator enable	Active-HIGH logic input enabling REG4–REG7 and PSW; requires prior standby regulator activation
REG5 (7)	5 V / 1.8 A output	High-current supply for logic/sound processor; protected by foldback current limiting
RST2/3 (8)	Combined reset output	Push-pull 3.3 V reset signal for REG2/REG3; OR-combined trigger with hysteresis
VP2 (9)	Secondary supply input	Supplies REG5/REG6; can connect to external DC-DC to reduce dissipation; withstands same transients as VP1
RDC2/3 (10)	Reset delay capacitor	Charged by 4 µA current source; sets reset pulse delay time for REG2/REG3 (e.g., 35 ms with 47 nF)
REG6 (11)	3.3 V / 1.2 A output	Medium-current supply for digital subsystems; foldback-protected and OOR-monitored
REG3 (12)	1.9 V / 150 mA output	Low-voltage supply for DSP core; enabled with REG2 via shared EN2/3; short-circuit proof
REG2 (13)	3.3 V / 200 mA output	Standby supply for microcontroller peripherals; shares EN2/3 and RST2/3 with REG3
STC (14)	Storage capacitor node	Backup supply for standby regulators during engine start; not for external loading
REG1 (15)	5 V / 600 mA output	Dedicated microcontroller supply; independently enabled by EN1; includes RST1 and RDC1
RST1 (16)	Independent reset output	5 V push-pull reset for REG1; timing controlled by RDC1; hysteresis prevents oscillation
REG4 (17)	8.5 V / 350 mA output	Tuner supply; monitored for out-of-regulation; disables on load dump or thermal shutdown
RDC1 (18)	Reset delay capacitor	Sets reset delay for REG1 and also controls PSW foldback delay time (e.g., 17.5 ms typ. with 47 nF)
EN1 (19)	REG1 enable input	Active-HIGH CMOS input; enables REG1, RST1, and RDC1 charging; 3.3 V/5 V compatible
EN2/3 (20)	REG2/REG3 enable input	Shared active-HIGH enable for REG2/REG3; triggers combined RST2/3 and RDC2/3
REG7 (21)	Adjustable output (2.4–10 V)	2 A capable; voltage set by external resistor divider on ADJ7; includes flyback clamp
ADJ7 (22)	REG7 feedback input	Connects to resistor divider midpoint; enables precise output voltage programming and stability
GND (23)	Ground / substrate	Common reference; heat tab internally tied to this pin for thermal conduction

Key Features

Feature	Design Value
Dual-supply architecture	VP1 powers critical circuits (bandgaps, standby, ignition); VP2 supplies high-current REG5/REG6 - enabling external DC-DC integration to cut thermal dissipation
Three operational modes	Sleep (5 µA), Standby (300–450 µA), and On - with strict enable sequencing (standby before MODE) to prevent uncontrolled startup
Intelligent reset sequencing	Independent RDC1 (for REG1) and shared RDC2/3 (for REG2/REG3) provide programmable, hysteresis-stabilized reset pulses aligned to actual output regulation
Comprehensive fault diagnostics	HOLD pin delivers three distinct logic levels: LOW (normal), MID (+140 °C pre-warning), HIGH (OOR, load dump, low VP1, or PSW short)
Automotive transient resilience	Withstands 50 V load dump (50 ms), −18 V reverse polarity, and jump-start up to 30 V - with internal clamps and protection on all supply pins

Applications

Infotainment Head Unit Power Management	Automotive CAN Node Supply
Use Scenario: Central car radio unit requiring simultaneous 5 V (MCU), 3.3 V (CAN transceiver), 1.9 V (DSP), 8.5 V (tuner), and 5 V/3.3 V (logic/sound processor) rails with engine-crank resilience. IC Role / Device Role / Timing Role: Primary multi-rail power manager; provides sequenced startup via RDC1/RDC2/3, backup via STC during cranking, and ignition-synchronized mute via IGNOUT. Use Value: Eliminates need for six discrete LDOs and external protection circuitry; reduces BOM count and improves cold-crank reliability through low-V_th ignition latch and storage capacitor hold-up.	Use Scenario: Always-on CAN node (e.g., gateway module) needing permanent 5 V and 3.3 V supply with watchdog reset and battery-drop immunity. IC Role / Device Role / Timing Role: Standby regulator hub; REG1 (5 V) and REG2 (3.3 V) remain active in Sleep/Standby modes; RST1/RST2/3 ensure clean MCU/CAN controller reset after brownout. Use Value: Maintains CAN communication during stop-start cycles; STC backup sustains REG1/REG2 for >100 ms during 0 V battery dips; low 5 µA Sleep current extends battery life.
CD/Tape Drive Power Control	Display Backlight & Antenna Switching
Use Scenario: CD/tape mechanism requiring controlled 5 V/1.8 A power delivery with overcurrent protection and thermal derating during extended play. IC Role / Device Role / Timing Role: REG5 output driver with foldback current limiting; PSW pin directly switches motor loads; HOLD signals overload or thermal pre-warning to host MCU. Use Value: Prevents nuisance shutdowns during motor inrush via RDC1-timed foldback delay; internal 16 V clamp protects drive electronics from inductive kickback.	Use Scenario: LCD display unit and electrically powered antenna requiring logic-level switching synchronized to ignition state. IC Role / Device Role / Timing Role: PSW pin drives display backlight/antenna; IGNIN→IGNOUT path provides crank-synchronized mute signal; MODE pin enables PSW only after valid standby rails are established. Use Value: Enables automatic display blanking and antenna disable during engine crank - reducing EMI and power demand at critical startup moment.

Infotainment Head Unit Power Management

Automotive CAN Node Supply

Use Scenario: Central car radio unit requiring simultaneous 5 V (MCU), 3.3 V (CAN transceiver), 1.9 V (DSP), 8.5 V (tuner), and 5 V/3.3 V (logic/sound processor) rails with engine-crank resilience.

IC Role / Device Role / Timing Role: Primary multi-rail power manager; provides sequenced startup via RDC1/RDC2/3, backup via STC during cranking, and ignition-synchronized mute via IGNOUT.

Use Value: Eliminates need for six discrete LDOs and external protection circuitry; reduces BOM count and improves cold-crank reliability through low-V_th ignition latch and storage capacitor hold-up.

Use Scenario: Always-on CAN node (e.g., gateway module) needing permanent 5 V and 3.3 V supply with watchdog reset and battery-drop immunity.

IC Role / Device Role / Timing Role: Standby regulator hub; REG1 (5 V) and REG2 (3.3 V) remain active in Sleep/Standby modes; RST1/RST2/3 ensure clean MCU/CAN controller reset after brownout.

Use Value: Maintains CAN communication during stop-start cycles; STC backup sustains REG1/REG2 for >100 ms during 0 V battery dips; low 5 µA Sleep current extends battery life.

CD/Tape Drive Power Control

Display Backlight & Antenna Switching

Use Scenario: CD/tape mechanism requiring controlled 5 V/1.8 A power delivery with overcurrent protection and thermal derating during extended play.

IC Role / Device Role / Timing Role: REG5 output driver with foldback current limiting; PSW pin directly switches motor loads; HOLD signals overload or thermal pre-warning to host MCU.

Use Value: Prevents nuisance shutdowns during motor inrush via RDC1-timed foldback delay; internal 16 V clamp protects drive electronics from inductive kickback.

Use Scenario: LCD display unit and electrically powered antenna requiring logic-level switching synchronized to ignition state.

IC Role / Device Role / Timing Role: PSW pin drives display backlight/antenna; IGNIN→IGNOUT path provides crank-synchronized mute signal; MODE pin enables PSW only after valid standby rails are established.

Use Value: Enables automatic display blanking and antenna disable during engine crank - reducing EMI and power demand at critical startup moment.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-output automotive power management applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLF35584QVVS1	4-channel LDO + watchdog + SPI interface; no integrated power switch or ignition buffer; 40 V max input	Requires external switch for antenna/display; lacks crank-synchronized mute; suited for distributed power architectures	Select when system needs SPI-configurable monitoring and separate high-side switching is preferred
MAX16922ATP+T	3-output regulator (5 V/300 mA, 3.3 V/300 mA, 5 V/2.5 A) + watchdog; no REG7 adjustability or IGN buffer; 40 V max input	No adjustable output or ignition interface; simpler feature set; lower pin count (20-pin TQFN)	Select for cost-sensitive head units without tuner or adjustable rail requirements

Compared with TLF35584QVVS1 and MAX16922ATP+T, the TDA3683SD/N2S,112 uniquely integrates ignition buffering, an adjustable 2.4–10 V output, and a 3 A power switch - making it optimal for full-featured car radios where crank synchronization, flexible voltage rails, and direct load control are mandatory.

Availability

TDA3683SD/N2S,112 is available at Aetrix Electronics and suitable for automotive infotainment head units, CAN gateway modules, CD/tape drive controllers, and display/antenna power systems requiring stable component supply, long lifecycle support, and AEC-Q100-compliant performance.

Supply support for TDA3683SD/N2S,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, delivering secure, energy-efficient, and highly integrated solutions.

The TDA3683SD/N2S,112 belongs to NXP's automotive power management IC portfolio, engineered specifically for centralized car radio power architectures requiring multi-rail sequencing, crank resilience, and integrated diagnostics.

FAQ

What is the maximum load dump voltage the TDA3683SD/N2S,112 can withstand?

The TDA3683SD/N2S,112 withstands load dump transients up to 50 V for durations ≤50 ms with rise time ≥2.5 ms on both VP1 and VP2 pins. This rating is validated per IEC 61000-4-5 and aligns with ISO 7637-2 Pulse 5a requirements for automotive electronics. The device remains functional during such events, with standby regulators and ignition buffer continuing operation while switched regulators and PSW are disabled.

How does the TDA3683SD/N2S,112 handle engine cranking voltage drops?

The TDA3683SD/N2S,112 maintains standby regulator operation during cranking via the STC (storage capacitor) pin, which provides backup supply when VP1/VP2 dip below regulation. Its ignition buffer includes a low-supply latch that ensures reliable IGNOUT LOW assertion even if battery voltage momentarily falls to 3 V. REG1, REG2, and REG3 remain active in Sleep/Standby modes, supporting CAN and MCU functionality throughout cranking.

Can the TDA3683SD/N2S,112's REG7 output be set to exactly 7.5 V?

Yes, the TDA3683SD/N2S,112's REG7 output is adjustable from 2.4 V to 10 V using an external resistor divider connected between REG7, ADJ7, and GND. To achieve 7.5 V, select resistors satisfying V_OUT = 1.25 V × (1 + R1/R2), where the ADJ7 reference is 1.25 V. Typical designs use R2 = 10 kΩ and R1 ≈ 50 kΩ, verified in Figure 10 of the datasheet. Output accuracy is ±5 % across load and temperature.

What happens to the TDA3683SD/N2S,112's outputs during thermal shutdown?

During thermal shutdown (>150 °C), the TDA3683SD/N2S,112 disables all switched regulators (REG4–REG7) and the power switch (PSW), but keeps standby regulators (REG1–REG3), ignition buffer (IGNOUT), and reset functions fully operational. The HOLD pin asserts HIGH to signal thermal fault. Once junction temperature falls below hysteresis threshold (~145 °C), normal operation resumes automatically - ensuring CAN bus and MCU remain powered while high-power sections are safely shut down.

Is the TDA3683SD/N2S,112 pin-compatible with the TDA3683J variant?

No, the TDA3683SD/N2S,112 is not pin-compatible with the TDA3683J. While both share identical electrical functionality and pin numbering, the TDA3683SD uses the RDBS23P package (reverse-bent leads), whereas the TDA3683J uses DBS23P (straight leads). Mechanical layout, lead pitch, and solder footprint differ - requiring separate PCB footprints. Thermal performance also varies slightly due to package geometry, though R_th(j-c) remains 1 K/W for both.

TDA3683SD/N2S,112 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 23-SIP Formed Leads

Packaging:: Tube

Product Status:: Obsolete

Applications:: Ignition Buffer, Regulator

Current - Supply:: 300µA

Voltage - Supply:: 9V ~ 18V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 23-DBS

TDA3683SD/N2S,112 FAQ

1.How can I place an order for TDA3683SD/N2S,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA3683SD/N2S,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TDA3683SD/N2S,112 reliable?

The price and inventory of TDA3683SD/N2S,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA3683SD/N2S,112 is usually 5 days.

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TDA3683SD/N2S,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA3683SD/N2S,112 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TDA3683SD/N2S,112?

For technical support, including TDA3683SD/N2S,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA3683SD/N2S,112 requirements.

6.How does Aetrix verify that TDA3683SD/N2S,112 is sourced from the original manufacturer or authorized distributors?

All TDA3683SD/N2S,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TDA3683SD/N2S,112 meets industry standards.

7.What is the process for return or replacement of TDA3683SD/N2S,112?

All TDA3683SD/N2S,112 units undergo pre-shipment inspection (PSI). If there is an issue with TDA3683SD/N2S,112, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TDA3683SD/N2S,112 part is unused and in its original packaging.

Return procedure for TDA3683SD/N2S,112:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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