NCP81147: Low Voltage Synchronous Buck Controller
The NCP81147 is a single phase solution with differential phase current sensing, synchronization input, remote ground power saving operation, and gate drivers to provide accurately regulated power. The adaptive non overlap gate drive and power saving operation circuit provide a low switching loss and high efficiency solution for server, notebook, and desktop systems. A high performance operational error amplifier is provided to simplify compensation of the system. The NCP81147 features also include softstart sequence, accurate overvoltage and over current protection, UVLO for power supply rails, and thermal shutdown.
Features- Internal High Performance Operational Amplifier
- Integrated MOSFET drivers
- Thermal shutdown protection
- Overvoltage and over current protection
- Power Saving Mode
- Supports 5.0 V to 19 V input
- 5.0 V to 12 v operation
- Chip enable feature through the OSC pin
- Guaranteed startup into pre-charged loads
- Internal softstart / stop
- Oscillator frequency range of 100 kHz to 1000 kHz
- OCP accuracy, Four re-entry times before latch
- Lossless differential inductor current sensing
- Internal High precision current sensing amplifier
- 20ns Adaptive FET non-overlap time of internal Gate Driver
- Vout from 0.8V to 3.3V (5V with 12V VCC)
- Thermally compensated current monitoring
- Integrated Boost diode with internal Rbst=2.2
- Load Operation
- Sync Function
- Remote Ground Sensing
| Benefits- Simplifies compensation of the system
- Saves space and simplifies design
- Ensures robust design
- Ensures robust design
- Maximizes efficiency during light load operation
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Applications- Desktop and Server Systems
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Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCP81147MNTXG | Active | Pb-free | QFN-16 | 485G-01 | 1 | Tape and Reel | 3000 | $0.5733 |
Specifications
| Product | Topology | Phases | Control Mode | VCC Min (V) | VCC Max (V) | fSW Typ (kHz) | tres Typ (ns) |
|---|
| NCP81147MNTXG | Step-Down | 1 | | 4.5 | 13.2 | | |
