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FS8861 Dataheets PDF



Part Number FS8861
Manufacturers Fortune Semiconductor
Logo Fortune Semiconductor
Description 1.0A Adjustable and Fixed Voltage LDO Linear Regulator
Datasheet FS8861 DatasheetFS8861 Datasheet (PDF)

Fo r tune Semiconductor Corporation FS8861 1.0A Adjustable and Fixed Voltage LDO Linear Regulator General Description The FS8861 is a low-dropout linear regulator that operates the input voltage from +2.5V to +7.0V and delivers 1.0A load current. The FS8861 is available in two types, either fixed or adjustable output voltage. The output voltage of the fixed types is preset at an internally trimmed voltage 1.8V, 2.5V, or 3.3V. The output range of the adjustable types is from 1.25V to 5V. The FS.

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Fo r tune Semiconductor Corporation FS8861 1.0A Adjustable and Fixed Voltage LDO Linear Regulator General Description The FS8861 is a low-dropout linear regulator that operates the input voltage from +2.5V to +7.0V and delivers 1.0A load current. The FS8861 is available in two types, either fixed or adjustable output voltage. The output voltage of the fixed types is preset at an internally trimmed voltage 1.8V, 2.5V, or 3.3V. The output range of the adjustable types is from 1.25V to 5V. The FS8861 consists of a 1.25V reference, an error amplifier, and a P-channel pass transistor allows the low 65µA (Typ.) ground pin current. Other features include short-circuit protection and thermal shutdown protection. Features Low dropout voltage 700mV at 1.0A typ. Adjustable output voltage (FS8861-CJ) or fixed output voltage (FS8861-xxCJ) at 1.8V, 2.5V, or 3.3V High output voltage accuracy Fixed output voltage : 35mV Adjustable output voltage : 50mV Small output capacitor Output current limit Thermal overload shutdown protection SOT-223 Package Applications Active SCSI Terminators High Efficiency Linear Regulators Monitor Microprocessor Low Voltage Micro-Controllers Post Regulator for Switching Power Ordering Information FS8861-xx x x Package Pin Out J SOT-223 1.GND 2.OUT 3.IN Note : For the adjustable voltage types, the GND pin is replaced with the ADJ pin Temperature Range C Commercial Standard Output Voltage (Fixed voltage types only) 18 : 1.8V 25 : 2.5V 33 : 3.3V SOT-223 GND FS8861 xxCJxxxx 1 GND/ ADJ 2 OUT 3 IN Package Marking Information EX FS8861-33CJ FS8861 33CJxxxx xxxx Date Code EX FS8861-CJ ADJ FS8861 CJxxxx xxxx Date Code FORTUNE SEMICONDUCTOR CO. TEL : +886-2-2809-4742 HTTP://WWW.FSC.COM.TW FAX: +886-2-2809-4874 1/10 TD0309-2401 VER. 1.0 Fo r tune Semiconductor Corporation FS8861 1.0A Adjustable and Fixed Voltage LDO Linear Regulator Pin Description Part NO. Symbol Description Pin 1 GND/ADJ Ground output or Adjustable output. FS8861-xxCJ Pin 2 OUT Regulator input. Pin 3 IN Regulator output. IN is the regulator input. Supply voltage can range from 2.5V to 7.0V. Bypass with a 10µF capacitor to GND. OUT is the output voltage. Sources up to 1.0A. Bypass with a 10µF capacitor to GND. GND provides the reference for all voltages. This pin also functions as a heat sink. It is recommended that solder it to a large pad or the circuit-board ground plane for better power dissipation. ADJ provides VREF=1.25V Typ. for adjustable VOUT. Typical Application Schematic VIN 10uF VIN 10uF FS8861-CJ VREF IADJ FS8861-xxCJ VOUT 10uF VOUT = VREF × (1 + R2 R1 ) + I ADJ × R2 10uF VOUT FORTUNE SEMICONDUCTOR CO. TEL : +886-2-2809-4742 HTTP://WWW.FSC.COM.TW FAX: +886-2-2809-4874 2/10 TD0309-2401 VER. 1.0 Fo r tune Semiconductor Corporation FS8861 1.0A Adjustable and Fixed Voltage LDO Linear Regulator Function Block Diagram IN Shutdown Logic 1.25V Bandgap Reference Current Limit Thermal Protection Fixed Voltage Type I.


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