TDA3681ATH: Multiple voltage regulator with switch and ignition buffer
The TDA3681A is a multiple output voltage regulator with a power switch and an ignition buffer. It is intended for use in car radios with or without a microcontroller. The TDA3681A contains the following:
sot418-3_3d
General
- Extremely low noise behaviour and good stability with very small output capacitors
- Second supply pin for regulators 3 and 4 to reduce power dissipation (e.g. via a DC-to-DC converter)
- Three VP-state controlled regulators (regulators 1, 3 and 4) and a power switch
- Regulator 2, reset and ignition buffer operational during load dump and thermal shutdown
- Combined control pin for switching regulators 1 and 3
- Separate control pins for switching regulator 4 and the power switch
- Supply voltage range from -18 V to +50 V
- Low quiescent current in standby mode (when regulators 1, 3 and 4 and power switch are switched off and ignition input is low)
- Hold output for low VP, load dump and temperature protection
- Reset (push-pull output stage) for regulator 2 and hold output (open-collector output)
- Adjustable reset delay time
- High supply voltage ripple rejection
- Backup capacitor for regulator 2
- One independent ignition buffer (active HIGH).
Protections
- Reverse polarity safe (down to -18 V without high reverse current)
- Able to withstand voltages up to 18 V at the outputs (supply line may be short-circuited)
- ESD protection on all pins
- Thermal protections
- Load dump protection
- Foldback current limit protection for regulators 1, 2, 3 and 4
- Delayed second current limit protection for the power switch (at short circuit)
- The regulator outputs and the power switch are DC short-circuit safe to ground and supply (VP).
Data Sheets (1)
| Name/Description | Modified Date |
|---|---|
| Multiple voltage regulator with switch and ignition buffer (REV 2.0) PDF (117.0 kB) TDA3681A | 29 Aug 2003 |
Package Information (1)
| Name/Description | Modified Date |
|---|---|
| plastic, heatsink small outline package; 20 leads; low stand-off height (REV 1.0) PDF (306.0 kB) SOT418-3 | 08 Feb 2016 |
Ordering Information
| Product | Status | Package version | Remarks | Package name | Operating Temperature (Cel) | S | Part type | Vout1 (VDC) | Vout2 (VDC) | Vout3 (VDC) | Vout4 (VDC) | Vout5 (VDC) | Vout6 (VDC) | Operating voltage (VDC) | Operating voltage 2 (V) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TDA3681ATH/N1S | Active | SOT418-3 | HSOP20 | ||||||||||||
| TDA3681ATH/N1C | No Longer Manufactured | SOT418-3 | HSOP20 | ||||||||||||
| TDA3681ATH/N1 | No Longer Manufactured | SOT418-3 | HSOP20 |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TDA3681ATH/N1C | | SOT418-3 | Reel 13" Q1/T1 in Drypack | Discontinued | TDA3681ATH/N1C,518 (9352 858 12518) | Standard Marking | TDA3681ATH/N1C |   | 3 | 3 | |
| TDA3681ATH/N1S | | SOT418-3 | Reel 13" Q1/T1 in Drypack | Active | TDA3681ATH/N1S,518 (9352 891 36518) | Standard Marking | TDA3681ATH/N1S | | 3 | 3 |
- plastic, heatsink small outline package; 20 leads; low stand-off height TDA8566
- TDA3681ATH
