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LT8580

ETC
Part Number LT8580
Manufacturer ETC
Description PFM step-up DC-DC converters
Published Feb 2, 2012
Detailed Description www.DataSheet.co.kr LT8580 General Description The LT8580 Series are PFM step-up DC-DC converters with very low ripple...
Datasheet PDF File LT8580 PDF File

LT8580
LT8580

Overview
www.
DataSheet.
co.
kr LT8580 General Description The LT8580 Series are PFM step-up DC-DC converters with very low ripple noise due to the high operation frequency.
The maximum operation frequency is 260KHz.
Only three components are required to realize the conversion from the battery voltage to a selected output voltage.
A driver pin (EXT) is provided for driving external power transistor to extend the output current capability where large current is required.
Enable pin (EN) is also provided so that the circuit can be powered down.
Features 260KHz Maximum Operation Frequency 2.
0V to 5.
0V Output Voltage With 0.
1V Step Low Start-up Voltage: 0.
8V at 1mA ±2.
5% Output Voltage Accuracy Up to 87% Efficiency Output current: 300mA at 2.
5V input, 3.
3V output Low Ripple and Low Noise Output Current Extendable by External Switch Ordering Information LT8580X X X X Applications Power source for applications where a higher voltage than the battery voltage is required One to three cell battery devices Power source for cameras, camcorders, VCRs, PDAs, LED and hand held communication instrument Package Type: T: SOT-23-3 F: SOT-23-5 E: SOT-89 Output Voltage: 20: 2.
0V 21: 2.
1V … 49: 4.
9V 50: 5.
0V External switch E: use external switch L: use internal switch Typical Applications 1 of 6 Datasheet pdf - http://www.
DataSheet4U.
net/ www.
DataSheet.
co.
kr LT8580 Block Diagram Current limiting comparator Error Amplifier + 1.
24V bandgap GND VOUT LX EXT + buffer PFM control OSC 260KHz EN Chip Enable Pin Assignment Pin Name LT8580 LXXT SOT-23-3 Part Marking and Package Type LT8580 LXXF SOT-23-5 LT8580 LXXE SOT-89 LT8580 EXXT SOT-23-3 LT8580 EXXF SOT-23-5 LT8580 EXXE SOT-89 Description LX EXT VOUT EN GND NC 2 3 1 - 5 2 1 4 3 VOUT 3 LXXT (SOT-23-3) 1 GND VOUT 3 EXXT (SOT-23-3) 1 GND 2 EXT 2 LX 3 2 1 LX 5 2 3 1 - 5 2 1 4 3 GND 4 3 2 1 - Switching pin Buffer output for external transistor Output voltage Chip enable (active high) Ground No connection LXXF (SOT-23-5) 1 EN E...


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