R1232中文资料带同步整流器功能的PWM降压DC/DC转换器数据手册Nisshinbo规格书

描述 Description

The R1232 Series are low supply current CMOS-based PWM step-down DC/DC converters with synchronous rectifier. R1232 includes a soft start circuit, under-voltage lockout circuit (UVLO) and latch type protection circuit. By simply using an inductor, a capacitor, and (resistors) as external components, a high-efficiency step-down DC/DC converter can be easily configured. R1232 comes in two types: R1232Dxx1A/B with internally fixed output voltage and R1232D001C/D with adjustable output voltage with external resistors.

特性 Features

• Input Voltage Range (Maximum Rating)：2.6 V to 5.5 V (6.5 V)；
• Supply Current：Typ. 140 µA (1 MHz), 240 µA (2.25 MHz) (No switching)；
• Standby Current：Typ. 0 µA (CE=\"L\")；
• Output Voltage Range：0.9 V to 3.3 V (Internally fixed, R1232Dxx1A/B),Externally adjustable (Feedback voltage : 0.8 V, R1232D001C/D)；
• Output Voltage Accuracy：± 2% (Feedback Voltage Accuracy : ± 16 mV)；
• Oscillator Frequency：1 MHz, 2.25 MHz；
• Oscillator Maximum Duty Cycle：Min. 100%；
• UVLO Detect Voltage：Typ. 2.25 V；
• Soft Start Time：Typ. 1 ms (1 MHz),Typ. 0.4 ms (2.25 MHz)；
• Coil-current Limit Circuit：Current limit Typ. 1.4 A；
• Latch Type Protection Circuit：Delay time for protection Typ. 2 ms；
• Package：SON-8；
• Ceramic capacitors can be used：CIN=COUT= 10 µF or more；

应用 Application

• Power source for portable equipment such as PDA, DSC, Notebook PC
• Power source for HDD

简介

R1232属于集成电路（IC）的DCDC开关稳压器。由制造生产的R1232稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。