R1230D数据手册Nisshinbo中文资料规格书

描述 Description

■OUTLINE
 The R1230D Series are PWM step-down DC/DC Converters with synchronous rectifier, low supply current by CMOS process. Each of these ICs consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, protection circuits, a protection against miss operation under low voltage (UVLO), PWM/VFM alternative circuit, a chip enable circuit, and a driver transistor.■FEATURES
●Built-in Driver ON Resistance
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• •P-channel 0.35Ω, N-channel 0.45Ω(at VIN=3V)
●Built-in Soft-start Function (TYP. 1.5ms), and Latch-type Protection Function (Delay Time; TYP. 1.5ms)
●Two choices of Oscillator Frequency
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• •500kHz, 800kHz
●PWM/VFM alternative with MODE pin
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• •PWM operation; MODE pin at “L”,
VFM operation; MODE pin at “H”
●High Efficiency
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• •TYP. 90%
●Output Voltage
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• •Stepwise Setting with a step of 0.1V in the range of 1.2V ∼4.0V(XX1A/B Type)
or adjustable in the range of 0.8V to VIN(001C/D Type)
●High Accuracy Output Voltage
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• •±2.0%(XX1A/B Type)
●Package
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• •SON8 (Max height 0.9mm, thin type)■APPLICATIONS
●Power source for portable equipment.

特性 Features

●Built-in Driver ON Resistance
•
•
•
•
•
•
•
•
•
•
•
• •P-channel 0.35Ω, N-channel 0.45Ω(at VIN=3V)
●Built-in Soft-start Function (TYP. 1.5ms), and Latch-type Protection Function (Delay Time; TYP. 1.5ms)
●Two choices of Oscillator Frequency
•
•
•
•
• •500kHz, 800kHz
●PWM/VFM alternative with MODE pin
•
•
•
•
• •PWM operation; MODE pin at “L”,
VFM operation; MODE pin at “H”
●High Efficiency
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
• •TYP. 90%
●Output Voltage
•
•
•
•
•
•
•
• •Stepwise Setting with a step of 0.1V in the range of 1.2V ∼4.0V(XX1A/B Type)
or adjustable in the range of 0.8V to VIN(001C/D Type)
●High Accuracy Output Voltage
•
•
•
•
•
•
•
•
• •±2.0%(XX1A/B Type)
●Package
•
•
•
• •SON8 (Max height 0.9mm, thin type)■