NR885E |Sanken Electric

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NR885E

Data Sheetdownload (PDF:752.64KB)
Application Notedownload (PDF:1066.32KB)

Description

NR880E series is synchronous rectifier type buck regulator ICs with integrated High-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 ON/OFF pin (EN Pin) turns the regulator on or off and helps to achieve low power consumption requirements.
The ICs integrate phase compensation circuit which reduces the number of external components and simplifies the design of customer application.
Available in an 8-pin SOIC package with an exposed thermal pad on the back side.

Application

 LCD TV / Blu-Ray / Set top box
 Green Electronic products
 Stand-by power supply for digital appliances

Features

・Current mode type PWM (normal load)
・Pulse skip operation (light load)
Switch mode for pulse skip load current
・Maximum efficiency at normal operation 95%
・Efficiency at light load 85%
(@Vin=12V,Vo=5V,Io=10mA) ・Low ESR capacitor can be used for output
・Time adjustable soft start function
・External ON/OFF function
・ External phase compensation terminal (COMP)
・Built-in protection functions
Overcurrent protection (OCP): Drooping-type, auto restart
Thermal shutdown (TSD): Auto restart
Undervoltage lock out circuit (UVLO)
・DIP8 package suitable for single sided PCB

Remarks

Package

Package Name:eSOIC8

Package Diagram

Design Support

Specifications

Built-in PowerYES
Output Voltage0.8V to 14V
Output Current3A
Input Voltage Range4.5V to 18V
Operating Frequency350kHz
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:752.64KB)
Application Notedownload (PDF:1066.32KB)
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