NR887D |Sanken Electric

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NR887D

Data Sheetdownload (PDF:53.62KB)
Application Notedownload (PDF:785.48KB)

Description

The NR887D is synchronous buck regulator ICs integrates High-side and Low-side power MOSFETs.
With the current mode control, ultra low ESR capacitors such as ceramic capacitors can be used.
The ICs have protection functions such as Over-Current Protection (OCP), Under-Voltage Lockout (UVLO) and Thermal Shutdown (TSD).
An adjustable Soft-Start by an external capacitor prevents the excessive inrush current at turn-on.
The ICs integrate phase compensation circuit which reduces the number of external components and simplifies the design of customer application.
The ON/OFF pin (EN Pin) turns the regulator on or off and helps to achieve low power consumption requirements.
The NR887D is available in an 8-pin DIP package.

Application

 LCD-TV
 Blu-Ray
 Power supply for digital appliances

Features

・Current mode PWM control
・Maximum efficiency: 95%
・Stable with low-ESR ceramic output capacitors
・Built-in Protection functions:
 Overcurrent protection (OCP): drooping type auto restart
 Thermal shutdown (TSD): auto restart
 Undervoltage (UVLO) circuit
・Built-in phase compensation, with no need for external components
・Adjustable soft-Start with an external capacitor
・ON/OFF function

Remarks

Package

Package Name:DIP8

Package Diagram

Design Support

Specifications

Built-in PowerYES
Output Voltage0.8V to 14V
Output Current2A
Input Voltage Range4.5V to 18V
Operating Frequency500kHz
Synchronous/AsynchronousSynchronous
Current Mode ControlYES
Maximum Input Voltage18V
Minimum Input Voltage4.5V
Output on/offYES
Low ESR Capacitor SupportYES
Overcurrent ProtectionDrooping Type
Phase CompensationBuilt-in
Thermal ProtectionYES
UVLOYES

Representative Circuit

Internal Block Diagram

Pin-Out Diagrams

Data Sheetdownload (PDF:53.62KB)
Application Notedownload (PDF:785.48KB)
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