BL8501 Datasheet - SHANGHAI BELLING

BL8501 Step down DC/DC controller

Pin No. 1 2 3 4 5 Symbol CE GND VFB EXT VIN Description Chip Enable Pin (Active with “H”) Ground Pin Pin for Feedback Voltage External Transistor Drive Pin (CMOS Output) Power Supply Pin DETAILED DESCRIPTION http://www.belling.com.cn - 1Total 10 Pages 8/8/2006 BL8501 The following description r.

www.DataSheet4U.com BL8501 Step down DC/DC controller OUTLINE The BL8501 is a CMOS-based PWM step-down DC-DC Converter controller. The device can offer the following advantages: lower supply current and wider operating input-voltage range. The BL8501 consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, a protection circuit, a PWM/VFM alternative circuit, a chip enable circuit, and detecting input voltage circuit. A low ripple, hig.

BL8501 Features

* Range of input Voltage: 3.5V~12V Built-in Soft-start Function and Protection Function (Reset type protection) Oscillation Frequency: 500KHz High efficiency: 90% High Accuracy Output Voltage: 2.0% Low Temperature-Drift Coefficient of Output Voltage: Typ: 100ppm/°C Operating Temperature Range: -20 ~85

BL8501_SHANGHAIBELLING.pdf