Description

The RJ2421AB0PB is an IC chip in the electronic component category. It is a step-up DC/DC converter equipped with a voltage regulator and a voltage detector. The IC consists of a VFM DC/DC converter, a linear regulator, and a voltage detector. It functions as a linear regulator when the input voltage is high and as a step-up DC/DC converter + linear regulator when the input voltage is low. It is suitable for battery-powered and handheld instruments due to its chip enable function that minimizes standby current. The IC also has a built-in voltage detector for monitoring output potentials.

Specifications and features

• Low Supply Current: TYP. 15µA (RS5RJ3624A : VIN=3.0V, at no load)
• Standby Mode: Istandby=MAX. 1.0µA (RS5RJ××××A), Istandby=MAX. 10.0µA (RS5RJ××××B)
• Low Voltage Operation Possible: Operating Voltage VIN=1.2V to 10V
• High Output Voltage Accuracy: Fixed Output Voltage Accuracy ±2.5%
• High Detector Threshold Accuracy: ±2.5%
• Output Voltage can be set at User's request (refer to Selection Guide)
• Voltage close to battery's voltage can be output because these ICs are of a step-up / step-down type
• Built-in Protection Circuits for Lx Driver
• Pin for External Driver is equipped, and a large current output can be obtained
• Small Package: 8pin SOP

Application Scenarios

• Power source for cameras, camcorders, and handheld audio equipment
• Power source for small OA apparatus such as note type personal computers and word processors
• Power source for handheld communication appliances such as pagers, cordless telephones, and cellular phones

Comparison

• Low supply current
• Standby mode
• Wide operating voltage range
• High output voltage accuracy
• High detector threshold accuracy
• Flexible output voltage settings
• Step-up and step-down capability
• Built-in protection circuits
• External driver pin for large current output
• Compact 8pin SOP package

There are no known disadvantages for the RJ2421AB0PB IC chip.