NCP1597B: Synchronous Buck Converter, 1 MHz, 2.0 A
The NCP1597B is a fixed 1 MHz, high-output-current, synchronous PWM converter that integrates a low-resistance, high-side P-channel MOSFET and a low-side N-channel MOSFET. The NCP1597B utilizes current mode control to provide fast transient response and excellent loop stability. It regulates input voltages from 4.0 V to 5.5 V down to an output voltage as low as 0.8 V and is able to supply up to 2 A. The NCP1597B has features including fixed internal switching frequency (FSW), and an internal soft-start to limit inrush current. Using the EN pin, shutdown supply current is reduced to 3 µA maximum. Other features include cycle-by-cycle current limiting; short-circuit protection, low dropout mode, power saving mode and thermal shutdown. The part is also offered in a 6-pin 3x3mm DFN package under the NCP1597A.
Features- Input Voltage Range: from 4.0 V to 5.5 V
- Internal 140 mΩ HighSide Switching P-FET and 90 mΩ Low-Side N-FET
- Fixed 1 MHz Switching Frequency
- Cycle-by-Cycle Current Limiting
- Overtemperature Protection
- Start-up with Pre-Biased Output Load
- 0.8 V +/- 1.5% Reference Voltage
- Power Saving Mode During Light Load
| Benefits- Optimized for +5V input
- High efficiency operation
- Small output inductor and output capacitance
- Protection feature
- Protection feature
- Compatible with uP Core and I/O requirements
- Ability to output low output voltage
- Increased efficiency at light load
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Applications | End Products- Set-Top-Box
- LCD-TV / DTV / Plasma TV
- USB Powered Devices
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Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCP1597BMNTWG | Active | Pb-free
Halide free | QFN-10 | 501-02 | 1 | Tape and Reel | 3000 | $0.3 |
Specifications
| Product | Topology | Control Mode | VCC Min (V) | VCC Max (V) | VO Typ (V) | IO Typ (A) | Efficiency (%) | fSW Typ (kHz) |
|---|
| NCP1597BMNTWG | Step-Down | Current Mode | 4 | 5.5 | 0.8 to 4.95 | 2 | 90 | 1000 |
