My Inquiry
My Account
NXP Semiconductors TDA3683SD/N2C,112
- Part No.:
- TDA3683SD/N2C,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 23-SIP Formed Leads
- Datasheet:
-
TDA3683SD/N2C,112.pdf
- Description:
- IC VOLT REG W/SW & IGNIT
- Quantity:
- Payment:
- Shipping:
Inventory:2,525
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TDA3683SD/N2C,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.
For engineers reviewing the TDA3683SD/N2C,112 datasheet, TDA3683SD/N2C,112 pinout, TDA3683SD/N2C,112 application, or TDA3683SD/N2C,112 equivalent, this device serves as a system-level power manager for infotainment ECUs-providing sequenced reset generation, thermal pre-warning via HOLD output, battery-backed standby regulation, and robust ignition signal conditioning in harsh automotive environments.
Technical Context
The TDA3683SD/N2C,112 implements three operational modes-Sleep (5 µA quiescent current), Standby (enabled standby regulators only), and On (full output activation)-controlled by EN1, EN2/3, and MODE pins with CMOS-compatible thresholds and hysteresis. Its architecture separates low-power standby regulation (REG1–REG3) from high-current switched regulation (REG4–REG7), with independent fault handling: standby regulators remain active during load dump and thermal shutdown, while switched regulators and PSW disable under those conditions.
Core protection logic includes foldback current limiting on all regulators except REG3 and the 2.2 A continuous / 3 A surge power switch, dual supply inputs (VP1 and VP2) rated for 50 V load dump transients, and an open-collector inverted ignition buffer (IGNIN→IGNOUT) with low-supply latch for cold-crank reliability. The HOLD pin provides 3-state diagnostic signaling (LOW/MID/HIGH) for thermal pre-warning, out-of-regulation detection (REG4–REG6), power switch foldback, and low-battery indication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VP1: 9–18 V operating; withstands 50 V load dump (≤50 ms); VP2: 6.5–18 V, supports external DC-DC input for efficiency |
| Standby Regulators | REG1: 5 V ±2.5% @ 600 mA; REG2: 3.3 V ±150 mV @ 200 mA; REG3: 1.9 V ±120 mV @ 150 mA |
| Switched Regulators | REG5: 5 V @ 1.8 A; REG6: 3.3 V @ 1.2 A; REG7: adjustable 2.4–10 V @ 2 A with external resistor divider |
| Power Switch | PSW: 2.2 A continuous / 3 A surge; 0.45 V dropout @ 1 A; internal 16 V clamp protects connected loads |
| Thermal & Fault Protection | Junction temp range: −40 °C to +150 °C; thermal pre-warning at >140 °C; HOLD output signals faults with 3-state logic levels |
| Reset & Timing | RST1: 5 V push-pull reset with 20–70 ms delay (47 nF RDC1); RST2/3: 3.3 V push-pull reset with same delay profile |
| Quiescent Current | 5 µA in Sleep mode (all enables < 0.8 V); 300–450 µA in Standby/On mode depending on enable configuration |
Pinout & Package
RDBS23P package: plastic rectangular DIL-bent-SIL (reverse bent), 23 leads, row spacing 2.54 mm, heat tab internally connected to GND (pin 23) for low thermal resistance (Rth(j-c) = 1 K/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VP1 (1) | Main supply input | Primary battery connection; powers bandgaps, standby regulators, and enables full functionality; withstands 50 V load dump |
| IGNIN (2) | Ignition signal input | Inverting Schmitt-trigger input for crank detection; latched low down to 3 V battery for cold-start reliability |
| PSW (3) | Power switch output | 2.2 A continuous switch for antenna/display/CD drives; includes flyback clamp and delayed foldback current limiting |
| IGNOUT (4) | Ignition buffer output | Open-collector inverted output; pulls low during engine crank to mute audio amplifiers immediately |
| HOLD (5) | Fault diagnostic output | 3-state output: LOW = no fault; MID = thermal pre-warning (>140 °C); HIGH = REG4/5/6 OOR, PSW foldback, or low VP1 |
| MODE (6) | Switched regulator enable | Active-HIGH control for REG4–REG7 and PSW; requires prior activation of EN1 or EN2/3 to transition from Standby to On |
| REG5 (7) | 5 V high-current output | 1.8 A supply for tuner/logic; short-circuit protected with foldback; disabled during load dump/thermal shutdown |
| RST2/3 (8) | Combined reset output | 3.3 V push-pull reset for REG2 and REG3; OR-combined trigger ensures either regulator can assert reset |
| VP2 (9) | Secondary supply input | Feeds REG5 and REG6; may be supplied from external DC-DC to reduce dissipation and improve efficiency |
| RDC2/3 (10) | Reset delay capacitor | Sets reset timing for REG2/REG3; charged at 2–8 µA; falling threshold at 1.0–1.4 V triggers RST2/3 assertion |
| REG6 (11) | 3.3 V high-current output | 1.2 A supply for sound processor; identical protection and disable behavior as REG5 |
| REG3 (12) | 1.9 V low-noise output | 150 mA supply for DSP core; no foldback protection; remains active during thermal shutdown/load dump |
| REG2 (13) | 3.3 V standby output | 200 mA supply for microcontroller peripherals; tracks REG3 during power-up/down; shares RDC2/3 and RST2/3 |
| STC (14) | Storage capacitor node | Backup supply for standby regulators during engine cranking; not for external loading-internal charge pump maintains REG1–REG3 |
| REG1 (15) | 5 V primary standby output | 600 mA supply for CAN bus/microcontroller; independently enabled by EN1; includes dedicated RDC1/RST1 |
| RST1 (16) | Independent reset output | 5 V push-pull reset for REG1; rising threshold at 4.43 V ensures clean MCU boot after stable 5 V rail |
| REG4 (17) | 8.5 V medium-current output | 350 mA supply for tuner section; out-of-regulation detection feeds HOLD output; disabled during fault conditions |
| RDC1 (18) | Reset delay capacitor | Sets RST1 timing and also controls PSW foldback delay (8–40 ms); charged at 2–8 µA; threshold 2.5–3.5 V |
| EN1 (19) | REG1 enable input | CMOS-compatible active-HIGH enable; 1.4–2.4 V rising threshold; controls REG1, RST1, and RDC1 charging |
| EN2/3 (20) | Shared enable input | Active-HIGH enable for REG2 and REG3; 1.4–2.4 V rising threshold; synchronizes their power-up/down sequencing |
| REG7 (21) | Adjustable output | 2.4–10 V @ 2 A; set via external resistor divider on ADJ7; includes built-in flyback clamp for inductive loads |
| ADJ7 (22) | Feedback input | Resistor divider connects REG7 output → ADJ7 → GND; sets output voltage with ±5% tolerance over load/temp |
| GND (23) | Ground / substrate | Reference for all regulators, switches, and logic; heat tab internally bonded to this pin for thermal conduction |
Key Features
| Feature | Design Value |
|---|---|
| Seven independent regulated outputs | Enables single-chip power architecture for car radios: three always-on standby rails (CAN/micro/DSP), four switched supplies (tuner/logic/sound/CD), eliminating discrete LDOs and DC-DCs |
| Integrated ignition buffer with latch | Provides reliable crank detection down to 3 V battery; inverted open-collector output directly interfaces with audio mute circuits without external logic |
| Back-up storage capacitor support | STC pin maintains REG1–REG3 during engine start-up voltage dips (e.g., <6 V), ensuring uninterrupted CAN/microcontroller operation without external supercaps |
| 3-state HOLD diagnostic output | Single-pin fault reporting (LOW/MID/HIGH) replaces multiple status lines-reduces MCU GPIO count and simplifies failure response in infotainment systems |
| Load dump and reverse polarity protection | Withstands 50 V transients (≤50 ms) and −18 V reverse battery on both VP1 and VP2, meeting ISO 7637-2 Pulse 5a requirements without external TVS diodes |
| Sequenced reset generation | Dual independent reset paths (RST1 for REG1; RST2/3 for REG2+REG3) with programmable delay ensure deterministic MCU boot order and prevent race conditions |
Applications
| Automotive Infotainment Head Unit | Car Radio Control Module |
|---|---|
Use Scenario: Central power management unit in OEM head units integrating tuner, CD player, display, and Bluetooth connectivity. IC Role / Device Role / Timing Role: Provides seven regulated rails, ignition-synchronized mute control, and fault diagnostics for full system power sequencing and crash-safe operation. Use Value: Eliminates 12+ discrete regulators and protection components; reduces BOM cost by ~35% and PCB area by 40% versus discrete solutions. | Use Scenario: Power subsystem for legacy AM/FM/CD radio modules requiring CAN interface persistence during engine start. IC Role / Device Role / Timing Role: Supplies 5 V CAN transceiver, 3.3 V microcontroller, and 1.9 V DSP core continuously-even during 50 V load dump events-while enabling tuner supplies only when needed. Use Value: STC-backed standby regulation sustains CAN communication through cranking; RST1/RST2/3 delays guarantee glitch-free MCU initialization. |
| Telematics Control Unit (TCU) | Aftermarket Display Interface |
Use Scenario: Power management for cellular/V2X modules where persistent low-power wake-up capability and LTE modem supply stability are critical. IC Role / Device Role / Timing Role: REG1 (5 V/600 mA) powers CAN/LIN interface; REG2 (3.3 V/200 mA) supplies MCU; REG3 (1.9 V/150 mA) feeds baseband processor-all active in Standby mode. Use Value: 5 µA Sleep current extends battery backup runtime; HOLD output alerts host MCU of thermal stress before shutdown, enabling graceful data save. | Use Scenario: Power solution for aftermarket LCD displays and touch controllers added to factory radios. IC Role / Device Role / Timing Role: PSW (pin 3) switches 12 V display backlight and USB-C power delivery; IGNOUT (pin 4) mutes audio during crank; REG5 (5 V/1.8 A) powers display logic. Use Value: Integrated 2.2 A power switch replaces external MOSFET + driver; ignition buffer eliminates need for external RC filter and comparator circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail automotive power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLF35584QVVS1 | 4-channel LDO + watchdog + ASIL-B safety monitor; no integrated power switch or ignition buffer; lower total output current (max 1.5 A aggregate) | Targeted at ADAS domain controllers requiring functional safety certification; lacks car radio-specific features like STC backup and crank detection | Select when ISO 26262 ASIL-B compliance is mandatory and ignition buffering is handled externally |
| MAX20090ATPA/VY+ | 6-output PMIC with SPI interface, spread-spectrum clocking, and higher integration (integrated FETs for all regulators); no standalone ignition buffer or STC pin | Designed for next-gen digital cockpits with dynamic voltage scaling; requires MCU firmware for configuration; no native crank-mute function | Select for scalable, software-configurable power trees where external ignition signal conditioning is acceptable |
Compared with TLF35584QVVS1 and MAX20090ATPA/VY+, the TDA3683SD/N2C,112 offers unique hardware-integrated ignition buffering and battery-backed standby regulation-critical for cost-sensitive, firmware-light car radio designs where crank-induced audio noise must be eliminated without MCU intervention.
Availability
TDA3683SD/N2C,112 is available at Aetrix Electronics and suitable for automotive infotainment head units, telematics control units, aftermarket display interfaces, and car radio control modules requiring stable component supply across extended temperature and transient-voltage environments.
Supply support for TDA3683SD/N2C,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 secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in automotive analog and power management IP.
The TDA3683SD/N2C,112 belongs to NXP's legacy automotive power management portfolio, specifically engineered to consolidate car radio power architecture-reducing system complexity, improving transient resilience, and enabling seamless engine-crank operation without external protection or sequencing components.
FAQ
What is the maximum load dump voltage the TDA3683SD/N2C,112 can withstand?
The TDA3683SD/N2C,112 withstands 50 V load dump transients on both VP1 and VP2 pins for durations up to 50 ms with rise time ≥2.5 ms, per ISO 7637-2 Pulse 5a. This rating applies in all operating modes-including Sleep, Standby, and On-and does not require external TVS diodes, making it suitable for direct battery connection in harsh automotive environments.
How does the TDA3683SD/N2C,112 handle engine cranking voltage drops?
The TDA3683SD/N2C,112 maintains operation of standby regulators (REG1–REG3) during cranking via the STC (pin 14) storage capacitor node, which acts as a backup supply when VP1/VP2 falls below regulation thresholds. The ignition buffer (IGNIN→IGNOUT) also incorporates a low-supply latch, ensuring reliable crank detection even if battery voltage dips to 3 V-enabling immediate audio muting without MCU involvement.
Can the TDA3683SD/N2C,112's REG7 output be used for DDR memory termination?
Yes-the TDA3683SD/N2C,112's REG7 output is adjustable from 2.4 V to 10 V at up to 2 A and supports DDR termination voltages (e.g., VTT = 0.9 V, VREF = 0.75 V) when configured with appropriate external resistor dividers on ADJ7 (pin 22). Its ±5% output tolerance, fast transient response, and built-in flyback clamp make it suitable for powering DDR I/O rails in automotive infotainment memory subsystems.
What is the purpose of the HOLD pin on the TDA3683SD/N2C,112?
The HOLD pin (pin 5) on the TDA3683SD/N2C,112 is a 3-state diagnostic output that signals fault conditions: LOW indicates normal operation; MID level (≈2.15 V) indicates thermal pre-warning (>140 °C); HIGH indicates out-of-regulation (REG4–REG6), power switch foldback, or low VP1. It consolidates multiple fault indicators into one pin, reducing MCU GPIO usage and simplifying failure response in automotive ECUs.
Does the TDA3683SD/N2C,112 support independent enable control for all standby regulators?
No-the TDA3683SD/N2C,112 provides independent enable control only for REG1 via EN1 (pin 19); REG2 and REG3 share a common enable input EN2/3 (pin 20). This design enforces synchronized power-up/down of the 3.3 V and 1.9 V rails, ensuring proper voltage tracking between microcontroller I/O and DSP core domains-a requirement for many automotive SoCs.
TDA3683SD/N2C,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/N2C,112 FAQ
1.How can I place an order for TDA3683SD/N2C,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA3683SD/N2C,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/N2C,112 reliable?
The price and inventory of TDA3683SD/N2C,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/N2C,112 is usually 5 days.
3.What payment methods are accepted for TDA3683SD/N2C,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA3683SD/N2C,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA3683SD/N2C,112?
TDA3683SD/N2C,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA3683SD/N2C,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/N2C,112?
For technical support, including TDA3683SD/N2C,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA3683SD/N2C,112 requirements.
6.How does Aetrix verify that TDA3683SD/N2C,112 is sourced from the original manufacturer or authorized distributors?
All TDA3683SD/N2C,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/N2C,112 meets industry standards.
7.What is the process for return or replacement of TDA3683SD/N2C,112?
All TDA3683SD/N2C,112 units undergo pre-shipment inspection (PSI). If there is an issue with TDA3683SD/N2C,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/N2C,112 part is unused and in its original packaging.
Return procedure for TDA3683SD/N2C,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDA3683SD/N2C,112 Tags
-
TPS2511DGNR
Texas Instruments
-
UTC2000/MG
Microchip Technology
-
TUSB320HAIRWBR
Texas Instruments
-
TPS61252DSGR
Texas Instruments
-
PI5USB30216CXUAEX
Diodes Incorporated
-
SN6501DBVR
Texas Instruments
-
CYPD3177-24LQXQT
Infineon Technologies
-
SN6501QDBVRQ1
Texas Instruments
-
STUSB1600AQTR
STMicroelectronics
-
SN6505BDBVR
Texas Instruments
-
SN6501DBVT
Texas Instruments
-
TPS65150PWPR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
