NCV891234: Step-Down Regulator, Dual-Mode, 2 MHz Low-IQ
The NCV891x34 is a Dual Mode regulator intended for Automotive, battery−connected applications that must operate with up to a 45 V input supply. Hybrid Low Power Mode allows the NCV891x34 to operate either as a PWM Buck Converter or as a Low Drop−Out Linear Regulator, and the NCV891x34 is suitable for systems with Low Noise and Low Quiescent Current requirements often encountered in automotive driver information systems. A reset (with fixed delay) and a fault pin (flagging low input voltage and high temperature warnings) simplify interfacing with a microcontroller.
Two pins are provided to synchronize switching to a clock, or to another NCV891x34. The NCV891x34 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- 40 µA Iq in Light Load Condition
- 2.0 A Maximum Output Current in PWM Mode in NCV891234
- Internal N−channel Power Switch
- VIN Operating Range 3.7 V to 36 V, Withstands Load Dump to 45 V
- Logic Level Enable Pin can be Tied to Battery
- Fixed Output Voltage of 5.0 V or 3.3 V with ±2% Accuracy
- 2 MHz Free−running Switching Frequency
- Input and Output Synchronization Pins
- NCV Prefix for Automotive Requiring Site and Control Changes
- Wettable Flanks DFN (pin edge plating)
- These Devices are Pb−Free and are RoHS Compliant
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Applications- Safety−Vision Systems
- Audio, Infotainment
- Instrumentation
- Telematics
| End Products |
Data Sheets (1)
Evaluation Board Documents (9)
Package Drawings (1)
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description |
|---|
| NCV891234MW33GEVB | Active | Pb-free | Step-Down Regulator, Dual-Mode Evaluation Board |
| NCV891234MW50GEVB | Active | Pb-free | Step-Down Regulator, Dual-Mode Evaluation Board |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCV891234MW33R2G | Active | AEC Qualified
PPAP Capable
Pb-free
Halide free | DFN-12 | 506CE | 1 | Tape and Reel | 3000 | $2.4999 |
| NCV891234MW50R2G | Active | AEC Qualified
PPAP Capable
Pb-free
Halide free | DFN-12 | 506CE | 1 | Tape and Reel | 3000 | $2.4999 |
Specifications
| Product | Topology | Control Mode | VCC Min (V) | VCC Max (V) | VO Typ (V) | IO Typ (A) | Efficiency (%) | fSW Typ (kHz) |
|---|
| NCV891234MW33R2G | Step-Down | Current Mode | 3.7 | 45 | 3.3 | 2 | | 2000 |
| NCV891234MW50R2G | Step-Down | Current Mode | 3.7 | 45 | 5 | 2 | | 2000 |
