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NR264S

Data Sheet(684KB)


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Package：SOP8

3D CAD Data

The NR264S is synchronous rectification buck converter IC with built-in power MOSFET. In light load, the IC operates with the pulse skip mode to improve the efficiency. By using the peak current control method, the IC stably operates with a low ESR capacitor such as a ceramic capacitor. The IC has the various protections such as the overcurrent protection, the undervoltage lockout, and the thermal shutdown.
The IC achieves the switching regulator circuit with few components and small mounting area.

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Features

    ・Synchronous Rectification
    ・Operation Modes:
    　Normal Load: Current Mode PWM Control
    　Light Load: Pulse Skip Operation
    ・Maximum Efficiency (VIN = 12 V, VOUT = 5 V)
    　Normal Load: 94%
    　Light Load (IOUT = 10 mA): 86%
    ・Stable with a Low ESR Ceramic Output Capacitor
    ・Few External Component Counts
    　(Fixed Output Voltage of 5 V)
    ・Soft-start Period Adjustment by External Capacitor
    ・Enable Function
    ・Frequency Limitation Function
    　(Pulse Skip Frequency in Light Load is Limited to 28 kHz)
    ・Protections:
    　Overcurrent Protection (OCP): Drooping Type, Autorestart
    　Thermal Shutdown (TSD): Auto-restart
    　Undervoltage Lockout (UVLO)
    　Output Short Circuit Protection: Burst Oscillation
    　Operation (Hiccup)

Application

    ・White Goods
    ・Audio Visual Equipment
    ・Office Automation Equipment
    ・Other Switched Mode Power Supply (SMPS)

Specifications

Built-in Power Power IC
Output Method Variable
Output Voltage 18.0 V
Output Current 1.0 A
Input Voltage Range 8.0 to 31 V
Operating Frequency 500 kHz
Synchronous / Asynchronous Synchronous
Current Mode Control YES
Maximum Input Voltage 31.00 V
Output On / Off YES
Low ESR Capacitor Support YES
Overcurrent Protection Drooping Type
Phase Compensation External
Thermal Protection YES
UVLO YES
Package Weight (Typ.) 0.078 g

Typical Application

Typical Application

Block Diagram

Block Diagram

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