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NCP1597B Dataheets PDF



Part Number NCP1597B
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description 2 A Synchronous Buck Regulator
Datasheet NCP1597B DatasheetNCP1597B Datasheet (PDF)

NCP1597B Buck Regulator - Synchronous 1 MHz, 2 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 internally compensated current mode control to provide good transient response, ease of implementation 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. .

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NCP1597B Buck Regulator - Synchronous 1 MHz, 2 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 internally compensated current mode control to provide good transient response, ease of implementation 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 mA maximum. Other features include cycle−by−cycle current limiting, short− circuit protection, power saving mode and thermal shutdown. Features • Input Voltage Range: from 4.0 V to 5.5 V • Internal 140 mW High−Side Switching P−Channel MOSFET and 90 mW Low−Side N−Channel MOSFET • Fixed 1 MHz Switching Frequency • Cycle−by−Cycle Current Limiting • Overtemperature Protection • Internal Soft−Start • Start−up with Pre−Biased Output Load • Adjustable Output Voltage Down to 0.8 V • Power Saving Mode During Light Load • These are Pb−Free Devices Applications • DSP Power • Hard Disk Drivers • Computer Peripherals • Home Audio • Set−Top Boxes • Networking Equipment • LCD TV • Wireless and DSL/Cable Modem • USB Power Devices http://onsemi.com DFN10 CASE 485C MARKING DIAGRAM 1597B ALYWG G 1597B = Specific Device Code A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package (Note: Microdot may be in either location) PIN CONNECTIONS EN 1 VCC 2 VCCP 3 AGND 4 FB 5 10 PGND 9 PGND 8 LX 7 LX 6 NC (Top View) ORDERING INFORMATION Device Package Shipping† NCP1597BMNTWG DFN10 3000 / Tape & (Pb−Free) Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. © Semiconductor Components Industries, LLC, 2013 August, 2019 − Rev. 2 1 Publication Order Number: NCP1597B/D VCC NCP1597B EN Power Reset UVLO THD Hiccup Soft−Start Vref FB + + gm − AGND NCP1597B BLOCK DIAGRAM + CA − + OSC PMOS M1 −PWM + Control Logic VCCP LX LX PGND PIN DESCRIPTIONS Pin No Symbol 1 EN 2 VCC 3 VCCP 4 AGND 5 FB 6 7, 8 9, 10 EP NC LX PGND PAD Figure 1. Block Diagram Description Logic input to enable the part. Logic high turns on the part and a logic low disables it. An internal pullup forces the part into an enable state when no external bias is present on the pin. Input supply pin for internal bias circuitry. A 0.1 mF ceramic bypass capacitor is preferred to connect to this pin. Power input for the power stage Analog ground pin. Connect to thermal pad. Feedback input pin of the Error Amplifier. Connect a resistor divider from the converter’s output voltage to this pin to set the converter’s output voltage. No connection The drains of the internal.



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