LR18115L-S08-R [UTC]
1.6X LINEAR FAN DRIVER WITH VOUT FULLY ON CONTROL; 与VOUT上完全控制1.6X线性风扇驱动器
| 型号： | LR18115L-S08-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | 1.6X LINEAR FAN DRIVER WITH VOUT FULLY ON CONTROL |
| 文件： | 总6页 (文件大小：157K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
Package
Packing
Lead Free
Halogen Free
LR18115L-S08-R
LR18115L-S08-T
LR18115G-S08-R
LR18115G-S08-T
SOP-8
SOP-8
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
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QW-R102-039.D
LR18115
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
1
2
3
4
8
GND
GND
GND
GND
FON
VIN
7
6
5
VOUT
VSET
PIN DESCRIPTION
PIN NO.
NAME
FON
DESCRIPTION
1
2
3
FON Input. Pulling the regulator fully on when this pin below 0.4V. Internally pulled high.
VIN
VOUT
Supply Input.
This pin is output voltage of regulator. Its voltage is 1.6 times of VSET.
This pin sets output voltage. Its voltage must be larger than 1V to guarantee VOUT 1.6
times of VSET.
4
VSET
5~8
GND
Common Ground. Use all four pins on SOP-8 device for heat sinking.
UNISONIC TECHNOLOGIES CO., LTD
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LR18115
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
VIN
VOUT FULLY ON
LOGIC
THERMAL
SHUTDOWN
CURRENT
LIMIT
FON
VSET
VOUT
R1
R2
R1=0.6xR2
GND
UNISONIC TECHNOLOGIES CO., LTD
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LR18115
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (unless otherwise specified )
PARAMETER
SYMBOL
VIN
RATINGS
-0.3 ~ +7
0 ~ 7
UNIT
V
Supply Input Voltage
Enable Input Voltage
Power Dissipation
VEN
V
PD
Internally Limited
+150
Junction Temperature
Operation Temperature
Storage Temperature
TJ
°C
°C
°C
TOPR
TSTG
-40~+85
-65~+150
Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER
SYMBOL
θJA
RATING
156
UNIT
°С/W
°С/W
Junction to Ambient
Junction to Case
θJC
39
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VCC
MIN
4.5
TYP
MAX
6
UNITS
V
Supply Voltage
Operating Temperature
TA
-40
85
°C
ELECTRICAL CHARACTERISTICS
(VSET=2V, VEN=5V, VIN=5V, IOUT＝0.5A, CIN＝2.2μF, COUT＝2.2μF, TA＝TJ＝25°C, unless otherwise specified )(Note)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNIT
VIN
Supply Voltage
Quiescent Current
VOUT
VCC
IQ
4.5
6
V
VOUT＝5V
3
mA
VOUT
VSET
Output Voltage/VSET Voltage
Line Regulation
VIN=6V,VSET=1V~3.3V
1.552 1.6 1.648 V/V
ΔVOUT
VOUT
ΔVOUT
VOUT
ROUT
VIN＝4.5V to 6V
0.2
0.2
0.5
%
%
Load Regulation
10mA≤IOUT≤0.5A
0.8
0.3
I
OUT＝0.5A, VSET＝3.4V
Output Resistance
Current Limit
0.2
1
Ω
ILIMLT
VOUT=0V
A
VSET
Minimum VSET Voltage
VSETpin Current
VSET(MIN)
ISET
1
V
80
200
nA
FON
High
Low
1.6
V
V
VFON
Voltage
FON
0.4
10
IFON
OVER TEMPERATURE PROTECTION
1.5
μA
FON pin Bias Current
FON =0V
Over Temperature Shutdown
Over Temperature Hysteresis
OTS
OTH
150
25
°C
°C
Note: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as
possible.
UNISONIC TECHNOLOGIES CO., LTD
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LR18115
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
VSET
FON
VSET
FON
VIN
LR18115
GND
VIN
VOUT
VOUT
CIN
2.2µF
COUT
2.2µF
Fan
VOUT=1.6×VSET
UNISONIC TECHNOLOGIES CO., LTD
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LR18115
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
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