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NXP Semiconductors TDA3682ST/N1C,112
- Part No.:
- TDA3682ST/N1C,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 13-SIP Formed Leads
- Datasheet:
-
TDA3682ST/N1C,112.pdf
- Description:
- IC VOLT REG W/SW & IGNIT 13-SIL
- Quantity:
- Payment:
- Shipping:
Inventory:2,944
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Product details
Overview
TDA3682ST/N1C,112 from NXP Semiconductors (formerly Philips) is a 13-pin automotive-grade multiple-output voltage regulator IC with integrated power switches, designed for car radio systems. It delivers five regulated outputs - including permanent 5 V (REG2), switchable 10.3 V (REG1), and three 8.2 V rails (REG3–REG5) - plus two protected power switches (PANT/SW1 and PCON/SW2), all operating from 10–18 V supply with 120 µA standby current.
For engineers reviewing the TDA3682ST/N1C,112 datasheet, TDA3682ST/N1C,112 pinout, TDA3682ST/N1C,112 application, or TDA3682ST/N1C,112 equivalent, key selection criteria include its five-rail regulation architecture, loss-of-ground-protected power switches, three-state enable control logic (EN1/EN2/EN3), load dump tolerance up to 50 V, and thermal protection in RDBS13P plastic DIL package.
Technical Context
The TDA3682ST/N1C,112 implements five independent linear regulators using PNP output stages for low dropout performance, with REG2 permanently active and REG1–REG5 controlled via three enable pins. Its mode selector logic interprets EN1/EN2/EN3 as L/M/H states to activate specific regulator combinations and power switches without microprocessor intervention.
Protection architecture includes foldback current limiting on all regulators, ESD protection on all pins, reverse polarity safety down to −18 V, and dedicated loss-of-ground protection for both SW1 and SW2. The backup function uses STCP pin to sustain REG2 during VP2 interruption via external capacitor discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulator outputs | Five rails: REG2 = 5.0 V (permanent), REG1 = 10.3 V, REG3–REG5 = 8.2 V (all switchable) |
| Supply voltage range | 10–18 V continuous; withstands 50 V load dump (t ≤ 50 ms) and 30 V jump start (t ≤ 10 min) |
| Quiescent current | 120 µA typical in standby mode (all enables LOW), enabling ultra-low-power head unit sleep states |
| Power switches | SW1 (PANT) and SW2 (PCON), each with 0.6 V typical dropout at 200 mA and loss-of-ground protection |
| Enable interface | Three 3-state inputs (EN1/EN2/EN3): L ≤1 V, M = 2–3 V, H ≥4 V; no external pull-ups required (50 kΩ input resistance) |
| Thermal limits | Junction temperature −40 °C to +150 °C; Rth(j-c) = 7 K/W enables high-power dissipation with minimal heatsinking |
| Output stability | Stable with wide-range capacitors (1–100 µF); low noise (95–170 µV RMS, 20 Hz–20 kHz) and 60–70 dB ripple rejection |
Pinout & Package
RDBS13P plastic rectangular-DIL-bent-SIL power package (SOT528-2), 13 leads, through-hole mount, with 17.7 mm × 24.0 mm footprint and 3.4 mm height; optimized for automotive PCB thermal management and wave soldering (max 260 °C, 5 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW2) | Power control switch 2 output | PCON rail; 0.6 V dropout at 200 mA; loss-of-ground protected; driven by EN3 |
| 2 (EN2) | Enable control input 2 | Selects REG3 (audio), REG4 (AM), or REG5 (FM) via L/M/H logic per Table 2 |
| 3 (SW1) | Power antenna switch 1 output | PANT rail; 0.6 V dropout at 200 mA; loss-of-ground protected; driven by EN3 |
| 4 (EN3) | Enable control input 3 | Controls SW1/SW2 activation: L = both OFF, M = SW2 ON, H = both ON (Table 3) |
| 5 (REG5) | FM band regulator output | 8.2 V ±0.33 V, 50 mA max; low-noise rail for FM tuner section |
| 6 (VP2) | Main supply voltage input | 10–18 V nominal; supports load dump up to 50 V; powers all regulators and switches |
| 7 (REG4) | AM band regulator output | 8.2 V ±0.33 V, 50 mA max; isolated rail for AM tuner section |
| 8 (GND) | Ground reference | Common return for all regulators, switches, and enables; loss-of-ground detection reference |
| 9 (REG3) | Audio regulator output | 8.2 V ±0.33 V, 200 mA max; supplies audio preamp and signal processing stages |
| 10 (EN1) | Enable control input 1 | Controls REG1 (illumination): L = OFF, H = ON (Table 1); no MID state |
| 11 (REG1) | Illumination regulator output | 10.3 V ±0.41 V, 250 mA max; powers display backlight and panel LEDs |
| 12 (STCP) | Storage capacitor connection | Backup node for REG2; sustains 5 V output during VP2 interruption via external capacitor discharge |
| 13 (REG2) | Permanent 5 V regulator output | 5.0 V ±0.2 V, 300 mA max; always active; powers MCU, memory, and logic even in standby |
Key Features
| Feature | Design Value |
|---|---|
| Five-rail regulation architecture | Dedicated, isolated outputs for illumination (10.3 V), BU5V (5 V permanent), audio (8.2 V), AM (8.2 V), and FM (8.2 V) minimize crosstalk in sensitive radio front-ends |
| Loss-of-ground protected switches | SW1 and SW2 remain functional and safe even if GND pin disconnects - critical for automotive harness fault resilience |
| Three-state enable logic | EN1/EN2/EN3 accept L/M/H voltage levels to select regulator/switch combinations without external decoding logic or MCU firmware overhead |
| Load dump immunity | Withstands 50 V transients (t ≤ 50 ms, tr ≥ 2.5 ms) without latch-up or damage - meets ISO 7637-2 Pulse 5a requirements |
| Backup power function | STCP pin enables capacitor-based hold-up for REG2 during VP2 interruption, supporting graceful MCU shutdown or EEPROM save operations |
| Ultra-low standby current | 120 µA total quiescent current with only REG2 active allows >1-year battery life in parked vehicle scenarios |
Applications
| Car Radio Illumination Control | AM/FM Tuner Power Management |
|---|---|
Use Scenario: Controlling LED backlight brightness and panel illumination in OEM car radios based on vehicle lighting state. IC Role / Device Role / Timing Role: TDA3682ST/N1C,112 provides regulated 10.3 V (REG1) to illumination circuitry, enabled/disabled via EN1 pin under microcontroller or discrete logic control. Use Value: Eliminates need for separate illumination regulator; 250 mA output supports multi-LED arrays; low dropout ensures operation during cranking (VP2 ≥11.4 V). | Use Scenario: Supplying isolated, low-noise power to AM and FM tuner modules in analog/digital hybrid car radios. IC Role / Device Role / Timing Role: TDA3682ST/N1C,112 delivers dedicated 8.2 V rails (REG4 for AM, REG5 for FM) with 70 dB ripple rejection and <140 µV noise, selected independently via EN2 pin states. Use Value: Prevents tuner crosstalk and sensitivity degradation; foldback current limiting protects against antenna short circuits. |
| Automotive Audio Preamp Supply | Microcontroller Backup Power |
Use Scenario: Powering analog audio preamplifier stages and signal conditioning circuits in car audio head units. IC Role / Device Role / Timing Role: TDA3682ST/N1C,112 supplies stable 8.2 V (REG3) to audio circuitry with 200 mA capability and 70 dB supply ripple rejection, activated via EN2 pin. Use Value: Low noise (<140 µV) and high PSRR preserve SNR in sensitive audio paths; thermal protection prevents failure during extended high-volume operation. | Use Scenario: Maintaining power to MCU, real-time clock, and non-volatile memory during engine cranking or battery disconnection events. IC Role / Device Role / Timing Role: TDA3682ST/N1C,112's permanent 5 V (REG2) output is sustained via STCP backup capacitor when VP2 drops, enabling safe system state retention. Use Value: Supports >170 ms hold-up time (e.g., 100 µF capacitor, 1 kΩ load); overvoltage clamping on STCP limits to ~18 V during recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiple-output automotive regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8853BDTR2G | Four-output regulator (3.3 V/5 V/8.5 V/12 V); no integrated power switches; requires external enable logic | Lacks PANT/PCON switches and STCP backup function; suited for simpler radio architectures without antenna control | Choose when only regulation is needed and switch control is handled externally. |
| TPS7H1101AQPWPRQ1 | Single 5 V/3 A LDO with adjustable tracking; no multi-rail or switch integration; higher IQ (50 µA vs 120 µA standby) | Cannot replace TDA3682ST/N1C,112's five-rail + dual-switch functionality; used as supplemental 5 V source only | Use only as supplementary 5 V supply where REG2 capacity is insufficient. |
Compared with NCV8853BDTR2G and TPS7H1101AQPWPRQ1, the TDA3682ST/N1C,112 uniquely integrates five precision rails, two protected power switches, and capacitor-backed standby power in one automotive-qualified package - eliminating six discrete regulators/switches and reducing BOM count and PCB area.
Availability
TDA3682ST/N1C,112 is available at Aetrix Electronics and suitable for automotive infotainment systems, OEM car radio designs, and industrial vehicle communication terminals requiring stable component supply across extended temperature ranges (−40 °C to +85 °C) and long lifecycle support.
Supply support for TDA3682ST/N1C,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 and power management ICs inherited from Philips Semiconductors.
The TDA3682ST/N1C,112 belongs to NXP's legacy automotive power management portfolio, specifically engineered for cost-sensitive, high-reliability car radio systems requiring integrated multi-rail regulation and antenna/power control without microprocessor dependency.
FAQ
What is the maximum load dump voltage the TDA3682ST/N1C,112 can withstand?
The TDA3682ST/N1C,112 withstands load dump transients up to 50 V for durations ≤50 ms with rise time ≥2.5 ms, as specified in the Limiting Values table. During such events, all regulator outputs except REG2 (BU5V) go low to protect downstream circuitry while maintaining MCU power integrity.
How does the STCP pin function in the TDA3682ST/N1C,112?
The STCP pin in the TDA3682ST/N1C,112 enables backup power for REG2 by connecting an external capacitor. When VP2 is present, the capacitor charges to VP2 −0.3 V; when VP2 drops, the stored charge sustains REG2 output, providing hold-up time calculable via tdelay = Cbackup × RL × (VP2 − VREG2) / 0.5 V.
Can the TDA3682ST/N1C,112 be used without a microcontroller?
Yes - the TDA3682ST/N1C,112 is designed for standalone operation. Its three enable pins (EN1/EN2/EN3) accept direct L/M/H voltage levels to configure regulator and switch states without firmware; Table 1–3 define all valid combinations for illumination, audio, AM/FM, PANT, and PCON control.
What is the dropout voltage specification for REG2 in the TDA3682ST/N1C,112?
REG2 dropout voltage in the TDA3682ST/N1C,112 depends on operating condition: 0.7 V typical between VSTCP and Vo(REG2) at 300 mA (note 4), or 1.3 V typical between VP2 and Vo(REG2) at 300 mA when VP2 = 6 V (note 5). This dual-path design enables efficient backup operation via STCP.
Does the TDA3682ST/N1C,112 support reverse polarity protection?
Yes - the TDA3682ST/N1C,112 is reverse polarity safe down to −18 V without drawing high reverse current, as confirmed in the Features and Limiting Values sections. This protects the device and connected circuitry during battery installation errors or jumper cable misconnections in automotive environments.
TDA3682ST/N1C,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 13-SIP Formed Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- -
- Current - Supply:
- 120µA
- Voltage - Supply:
- 11.4V ~ 18V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 13-PRDBS
TDA3682ST/N1C,112 FAQ
1.How can I place an order for TDA3682ST/N1C,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA3682ST/N1C,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 TDA3682ST/N1C,112 reliable?
The price and inventory of TDA3682ST/N1C,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA3682ST/N1C,112 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA3682ST/N1C,112 transactions.
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TDA3682ST/N1C,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA3682ST/N1C,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 TDA3682ST/N1C,112?
For technical support, including TDA3682ST/N1C,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA3682ST/N1C,112 requirements.
6.How does Aetrix verify that TDA3682ST/N1C,112 is sourced from the original manufacturer or authorized distributors?
All TDA3682ST/N1C,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 TDA3682ST/N1C,112 meets industry standards.
7.What is the process for return or replacement of TDA3682ST/N1C,112?
All TDA3682ST/N1C,112 units undergo pre-shipment inspection (PSI). If there is an issue with TDA3682ST/N1C,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 TDA3682ST/N1C,112 part is unused and in its original packaging.
Return procedure for TDA3682ST/N1C,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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