NCV890131: Automotive Buck Switching Regulator, 1.2 A, 2 MHz, 45 V Load Dump, Sync In and Sync Out
The NCV890131 is a fixed-frequency, monolithic, Buck switching regulator intended for Automotive, battery-connected applications that must operate with up to a 32 V input supply. The regulator is suitable for systems with low noise and small form factor requirements often encountered in automotive driver information systems. The NCV890131 is capable of converting the typical 4.5 V to 18 V automotive input voltage range to outputs as low as 3.3 V at a constant switching frequency above the sensitive AM band, eliminating the need for costly filters and EMI countermeasures. Two pins are provided to synchronize switching to a clock, or to another NCV890131. The NCV890131 also provides several protection features expected in Automotive power supply systems such as current limit, short circuit protection, and thermal shutdown. In addition, the high switching frequency produces low output voltage ripple even when using small inductor values and an all-ceramic output filter capacitor - forming a space-efficient switching regulator solution.
Features- 2 MHz Free-running Switching Frequency
- Internal N-Channel Power Switch
- Low VIN Operation Down to 4.5 V
- High VIN Operation to 32 V
- Withstands Load Dump to 45 V
- Logic level Enable Input Can be Directly Tied to Battery
- 1.4 A (min) Cycle-by-Cycle Peak Current Limit
- Short-Circuit Protection enhanced by Frequency Foldback
- ±1.75% Output Voltage Tolerance
- Output Voltage Adjustable Down to 0.8 V
- 1.4 ms Internal Soft-Start
- Thermal Shutdown (TSD)
- Auto-synchronizes with Other NCV890101 or to an External Clock
| Benefits- Enables to use small size, low cost inductor and EMC filter
- Fewer external components
- Maintains operation during battery transients
- Maintains operation during battery transients
- Protects the load from load dump
- Flexable enable
- Protects against over current faults
- Protects against short circuits on the output
- Highly accurate regulation.
- Suitable for a wide range of applications
- Limits inrush current
- Thermally protects IC
- Tailored EMC Response
|
Applications- Audio
- Infotainment
- Safety - Vision Systems
- Instrumentation
| End Products |
Design & Development Tools (1)
Package Drawings (1)
Simulation Models (4)
Data Sheets (1)
Evaluation Board Documents (5)
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description |
|---|
| NV890131MWTXGEVB | Active | Pb-free | High Frequency Buck Converter Evaluation Board |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCV890131MWTXG | Active | AEC Qualified
PPAP Capable
Pb-free | DFN-10 | 485C | 1 | Tape and Reel | 3000 | $1.2 |
Specifications
| Product | Topology | Control Mode | VCC Min (V) | VCC Max (V) | VO Typ (V) | IO Typ (A) | Efficiency (%) | fSW Typ (kHz) |
|---|
| NCV890131MWTXG | Step-Down | Current Mode | 4.5 | 45 | Adjustable | 1.2 | | 2200 |
