UNISONIC TECHNOLOGIES CO., LTD
LR18115
LINEAR INTEGRATED CIRCUIT
1.6X LINEAR FAN DRIVER WITH VOUT FULLY ON CONTROL
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UNISONIC TECHNOLOGIES CO., LTD
LR18115
LINEAR INTEGRATED CIRCUIT
1.6X LINEAR FAN DRIVER WITH VOUT FULLY ON CONTROL
DESCRIPTION
The UTC LR18115 is a low output resistance 1.6X positive
voltage linear fan driver with very low dropout
voltage at up to 500mA. The UTC LR18115 consists of an error amplifier, output stage,
voltage divider, over temperature protection, current limiting scheme and Fully Control logic. VOUT
voltage follows the 1.6 times of VSET
voltage until it reaches VIN
voltage. The VSET
voltage must be larger than 1V to guarantee VOUT 1.6 times of VSET. When given low,
VOUT can be fully turned on by FON pin. Good regulation over
variation in line, load and temperature is also provided by UTC LR18115.
FEATURES
* VOUT Follows 1.6 Times of VSET * 0.3Ω Output Resistance @ 0.5A * Over Temperature Protection * Current Limiting Protection
* FON Pin to Turn VOUT Fully On
ORDERING INFORMATION
Ordering Number LR18115G-S08-R
Package SOP-8
Packing Tape Reel
MARKING
www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd
1 of 5
QW-R102-039.F
LR18115
PIN CONFIGURATION
FON 1
VIN 2
VOUT
3
VSET 4
LINEAR INTEGRATED CIRCUIT
8 GND 7 GND 6 GND 5 GND
PIN DESCRIPTION
PIN NO. 1 2 3
4
5~8
NAME FON VIN VOUT
VSET
GND
DESCRIPTION
FON Input. Pulling the regulator fully on when this pin below 0.4V. Internally pulled high.
Supply Input. This pin is output
voltage of regulator. Its
voltage is 1.6 times of VSET. This pin sets output
voltage. Its vo...