.hide-partial { max-height: none; } .show-more { display: none; }

Open Drain Mga LED Lighting Driver IC

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Mga Resulta: 118

Mga Ginamit na Filter:

Uri ng Output = Open Drain

Manufacturer

Dami ng Output

Topology

Current ng Output

Package / Case

Supply Voltage - Max

Supply Voltage - Min

Frequency ng Pagpapatakbo

Output Voltage

Series

Minimum na Operating Temperature

Maximum na Operating Temperature

Mga Feature

Kuwalipikasyon

Packaging

I-reset Lahat

Maghanap sa loob ng mga resulta

May Stock

Karaniwang May Stock

Aktibo

Mga Bagong Produkto

Sumusunod sa RoHS

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

# ng Piyesa

LED Lighting Driver ICs Automotive 3-A synch ronous buck LED dri

TPS92643QPWPRQ1
Texas Instruments
1: ₱188.62
16,889May Stock

Mfr. # ng Piyesa
TPS92643QPWPRQ1

# ng Piyesa ng Mouser
595-TPS92643QPWPRQ1

Texas Instruments

LED Lighting Driver ICs Automotive 3-A synch ronous buck LED dri

Alamin Pa

Datasheet

16,889May Stock

Cut Tape

₱188.62

₱141.02

₱129.12

₱115.43

Reel

₱96.99

Tingnan

Available ang MouseReel

Min.: 1
Mult.: 1

: 2,000

1 Output

Buck

HTSSOP-16

36 V

5.5 V

400 kHz to 2.2 MHz

TPS92643

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

LED Lighting Driver ICs LITIX

TLD700216ESXUMA1
Infineon Technologies
1: ₱150.54
3,695May Stock

Mfr. # ng Piyesa
TLD700216ESXUMA1

# ng Piyesa ng Mouser
726-TLD700216ESXUMA1

Infineon Technologies

LED Lighting Driver ICs LITIX

Alamin Pa

Datasheet

3,695May Stock

Cut Tape

₱150.54

₱112.46

₱101.75

₱91.63

Reel

₱77.35

Tingnan

Available ang MouseReel

Min.: 1
Mult.: 1

: 3,000

24 Output

76.5 mA

TSDSO-24

28 V

6 V

35 V

TLD7002

- 40 C

+ 150 C

Reel, Cut Tape, MouseReel

LED Lighting Driver ICs Automotive display L ED-backlight driver

LP8864QRHBRQ1
Texas Instruments
1: ₱256.45
8,091May Stock

Mfr. # ng Piyesa
LP8864QRHBRQ1

# ng Piyesa ng Mouser
595-LP8864QRHBRQ1

Texas Instruments

LED Lighting Driver ICs Automotive display L ED-backlight driver

Alamin Pa

Datasheet

8,091May Stock

Cut Tape

₱256.45

₱193.38

₱177.91

₱160.65

Tingnan

Reel

₱138.04

Available ang MouseReel

Min.: 1
Mult.: 1

: 3,000

4 Output

Boost, SEPIC

200 mA

VQFN-32

48 V

3 V

100 kHz to 2.2 MHz

48 V

LP8864

- 40 C

+ 125 C

PWM Dimming, I2C Control

Reel, Cut Tape, MouseReel

LED Lighting Driver ICs Boost/SEPIC high dim ming performance LE

TPS92390RHBR
Texas Instruments
1: ₱235.03
8,322May Stock

Mfr. # ng Piyesa
TPS92390RHBR

# ng Piyesa ng Mouser
595-TPS92390RHBR

Texas Instruments

LED Lighting Driver ICs Boost/SEPIC high dim ming performance LE

Alamin Pa

Datasheet

8,322May Stock

Cut Tape

₱235.03

₱174.93

₱160.06

₱143.40

Tingnan

Reel

₱121.98

Available ang MouseReel

Min.: 1
Mult.: 1

: 3,000

4 Output

Boost, SEPIC

200 mA

QFN-32

48 V

3 V

100 kHz to 2.2 MHz

48 V

TPS92390

- 40 C

+ 125 C

I2C Control, PWM Control

Reel, Cut Tape, MouseReel

LED Lighting Driver ICs Automotive LED driver 4-channel 200 mA with a DC-DC converter controller

ALED7709ATR
STMicroelectronics
1: ₱157.08
2,697May Stock

Mfr. # ng Piyesa
ALED7709ATR

# ng Piyesa ng Mouser
511-ALED7709ATR

STMicroelectronics

LED Lighting Driver ICs Automotive LED driver 4-channel 200 mA with a DC-DC converter controller

Alamin Pa

Datasheet

2,697May Stock

Cut Tape

₱157.08

₱116.62

₱106.51

₱95.80

Reel

₱73.19

Tingnan

Min.: 1
Mult.: 1

: 3,000

6 Output

Boost

200 mA

QFN-24

42 V

4.5 V

250 kHz to 2.2 MHz

40 V

- 40 C

+ 125 C

AEC-Q101

Reel, Cut Tape

LED Lighting Driver ICs MPSafeTM 42V, 3A Buck or 2.4A Buck-Boost, Synchronous Infrared LED Driver, AEC-Q100 Qualified

MPQ7231GLE-D30-AEC1-P
Monolithic Power Systems (MPS)
1: ₱238.60
500May Stock

Mfr. # ng Piyesa
MPQ7231GLE-D30-AEC1-P

# ng Piyesa ng Mouser
946-MPQ7231GLE-D30P

Monolithic Power Systems (MPS)

LED Lighting Driver ICs MPSafeTM 42V, 3A Buck or 2.4A Buck-Boost, Synchronous Infrared LED Driver, AEC-Q100 Qualified

Alamin Pa

Datasheet

500May Stock

Cut Tape

₱238.60

₱179.69

₱165.41

₱149.35

Reel

₱139.83

Tingnan

Min.: 1
Mult.: 1

: 500

1 Output

Buck, Buck-Boost

2.4 A, 3 A

QFN-19

42 V

1.25 MHz, 2.4 MHz

MPQ7231

- 40 C

+ 150 C

Built for Infrared (IR) LED Applications, Fault Indication, Integrated Current-Sense Resistor, Improved Efficiency and Thermals, Optimized for EMC/EMI, Over-Current Protection, Over-Voltage Protection

Reel, Cut Tape

LED Lighting Driver ICs 8B Fast-Mode Pluse I 2C-Bus LED Driver

TLC59208FIPWR
Texas Instruments
1: ₱120.79
3,621May Stock

Mfr. # ng Piyesa
TLC59208FIPWR

# ng Piyesa ng Mouser
595-TLC59208FIPWR

Texas Instruments

LED Lighting Driver ICs 8B Fast-Mode Pluse I 2C-Bus LED Driver

Datasheet

3,621May Stock

Cut Tape

₱120.79

₱89.25

₱81.52

₱72.59

Reel

₱59.20

Tingnan

Available ang MouseReel

Min.: 1
Mult.: 1

: 2,000

8 Output

Boost

50 mA

TSSOP-16

5.5 V

3 V

1 MHz

17 V

TLC59208F

- 40 C

+ 85 C

PWM Dimming, I2C Control

Reel, Cut Tape, MouseReel

LED Lighting Driver ICs 8B Fast-Mode Pluse I 2C-Bus LED Driver

TLC59208FIRGYR
Texas Instruments
1: ₱120.79
2,342May Stock

Mfr. # ng Piyesa
TLC59208FIRGYR

# ng Piyesa ng Mouser
595-TLC59208FIRGYR

Texas Instruments

LED Lighting Driver ICs 8B Fast-Mode Pluse I 2C-Bus LED Driver

Datasheet

2,342May Stock

Cut Tape

₱120.79

₱89.25

₱81.52

₱72.59

Reel

₱60.69

Tingnan

Available ang MouseReel

Min.: 1
Mult.: 1

: 2,500

8 Output

Boost

50 mA

VQFN-16

5.5 V

3 V

1 MHz

17 V

TLC59208F

- 40 C

+ 85 C

PWM Dimming, I2C Control

Reel, Cut Tape, MouseReel

LED Lighting Driver ICs I2C-Controlled 4-Channel Low-Voltage 120

MAX25512ATG/VY+
Analog Devices / Maxim Integrated
1: ₱238.60
167May Stock

Mfr. # ng Piyesa
MAX25512ATG/VY+

# ng Piyesa ng Mouser
700-MAX25512ATG/VY+

Analog Devices / Maxim Integrated

LED Lighting Driver ICs I2C-Controlled 4-Channel Low-Voltage 120

Datasheet

167May Stock

₱238.60

₱177.91

₱163.03

₱145.78

Tingnan

Min.: 1
Mult.: 1

4 Output

Boost

120 mA

TQFN-24

36 V

4.5 V

400 kHz to 2.2 MHz

MAX25512

- 40 C

+ 125 C

Tube

LED Lighting Driver ICs AUTOMOTIVE, HIGH CURRENT LED BOOST/BUCK-BOOST CONTROLLER

A6271KLPTR-T
Allegro MicroSystems
1: ₱266.56
7,994May Stock

Mfr. # ng Piyesa
A6271KLPTR-T

# ng Piyesa ng Mouser
250-A6271KLPTR-T

Allegro MicroSystems

LED Lighting Driver ICs AUTOMOTIVE, HIGH CURRENT LED BOOST/BUCK-BOOST CONTROLLER

Alamin Pa

Datasheet

7,994May Stock

Cut Tape

₱266.56

₱202.30

₱186.24

₱168.39

Tingnan

Reel

₱143.99

Available ang MouseReel

Min.: 1
Mult.: 1

: 4,000

1 Output

Boost, Buck, Buck-Boost

150 mA

TSSOP-16

50 V

4.2 V

70 kHz to 700 kHz

A6271

- 40 C

+ 150 C

Reel, Cut Tape, MouseReel

LED Lighting Driver ICs Boost/SEPIC high dim ming performance LE

TPS92391RHBR
Texas Instruments
1: ₱234.43
4,456May Stock

Mfr. # ng Piyesa
TPS92391RHBR

# ng Piyesa ng Mouser
595-TPS92391RHBR

Texas Instruments

LED Lighting Driver ICs Boost/SEPIC high dim ming performance LE

Alamin Pa

Datasheet

4,456May Stock

Cut Tape

₱234.43

₱177.31

₱163.03

₱146.97

Tingnan

Reel

₱126.14

Available ang MouseReel

Min.: 1
Mult.: 1

: 3,000

6 Output

Boost, SEPIC

200 mA

QFN-32

48 V

3 V

100 kHz to 2.2 MHz

48 V

TPS92391

- 40 C

+ 125 C

I2C Control, PWM Control

Reel, Cut Tape, MouseReel

LED Lighting Driver ICs Synchronous Boost with Synchronous Buck

MAX25601AATJ/VY+
Analog Devices / Maxim Integrated
1: ₱440.30
354May Stock

Mfr. # ng Piyesa
MAX25601AATJ/VY+

# ng Piyesa ng Mouser
700-MAX25601AATJ/VY+

Analog Devices / Maxim Integrated

LED Lighting Driver ICs Synchronous Boost with Synchronous Buck

Alamin Pa

Datasheet

354May Stock

₱440.30

₱381.40

₱366.52

₱345.10

Tingnan

Min.: 1
Mult.: 1

1 Output

Boost, Buck

30 A

TQFN-32

36 V

4.5 V

200 kHz to 2.2 MHz

4.9 V to 5.1 V

MAX25601

- 40 C

+ 125 C

PWM Dimming, Short Circuit and Thermal Protection

Tray

LED Lighting Driver ICs 4.5V-28Vin, 4-Channe l Boost WLED Contro

MP3398LGS-P
Monolithic Power Systems (MPS)
1: ₱160.06
465May Stock

Mfr. # ng Piyesa
MP3398LGS-P

# ng Piyesa ng Mouser
946-MP3398LGS-P

Monolithic Power Systems (MPS)

LED Lighting Driver ICs 4.5V-28Vin, 4-Channe l Boost WLED Contro

Datasheet

465May Stock

Cut Tape

₱160.06

₱119.00

₱108.89

₱97.58

Reel

₱87.47

Tingnan

Min.: 1
Mult.: 1

: 500

4 Output

Boost

350 mA

SOIC-16

28 V

4.5 V

540 kHz

Adjustable

MP3398L

- 40 C

+ 125 C

PWM Dimming, Open LED Protection

Reel, Cut Tape

LED Lighting Driver ICs

BD8379FV-M
ROHM Semiconductor
1: ₱64.86
8,000May Stock

Mfr. # ng Piyesa
BD8379FV-M

# ng Piyesa ng Mouser
755-BD8379FV-M

ROHM Semiconductor

LED Lighting Driver ICs

Alamin Pa

Datasheet

8,000May Stock

₱64.86

₱46.47

₱41.83

₱36.77

Tingnan

Min.: 1
Mult.: 1

12 Output

Boost

50 mA

SSOP-20

5.5 V

3 V

1.25 MHz

35 V

- 40 C

+ 105 C

Tube

LED Lighting Driver ICs Power Ballast Duel LED Driver

NCV78763DQ6AR2G
onsemi
1: ₱524.79
1,490May Stock

Mfr. # ng Piyesa
NCV78763DQ6AR2G

# ng Piyesa ng Mouser
863-NCV78763DQ6AR2G

onsemi

LED Lighting Driver ICs Power Ballast Duel LED Driver

Alamin Pa

Datasheet

1,490May Stock

Cut Tape

₱524.79

₱407.58

₱377.83

₱345.70

Tingnan

Reel

₱292.15

Min.: 1
Mult.: 1

: 1,500

2 Output

Boost, Buck

1.6 A

SSOP-36

40 V

4 V

8 MHz

Adjustable

NCV78763

- 40 C

+ 150 C

PWM Dimming, Short Circuit and Thermal Protection

AEC-Q100

Reel, Cut Tape

LED Lighting Driver ICs 8ch LED Drvr IC 3-5.5V; SSOP-B16

BD8378FV-ME2
ROHM Semiconductor
1: ₱55.93
2,558May Stock
NRND

Mfr. # ng Piyesa
BD8378FV-ME2

# ng Piyesa ng Mouser
755-BD8378FV-ME2

NRND

ROHM Semiconductor

LED Lighting Driver ICs 8ch LED Drvr IC 3-5.5V; SSOP-B16

Alamin Pa

Datasheet

Mga Komento sa Produkto

2,558May Stock

Cut Tape

₱55.93

₱40.28

₱36.30

₱31.95

Tingnan

Reel

₱26.60

Available ang MouseReel

Min.: 1
Mult.: 1

: 2,500

8 Output

Boost

50 mA

SSOP-B-16

5.5 V

3 V

1.25 MHz

35 V

- 40 C

+ 105 C

3 Wire Serial Interface

Reel, Cut Tape, MouseReel

LED Lighting Driver ICs LED MV Int Switch SO-8EP T&R 2.5K

AL8866QSP-13
Diodes Incorporated
1: ₱85.09
6,624May Stock
Bagong Produkto

Mfr. # ng Piyesa
AL8866QSP-13

# ng Piyesa ng Mouser
621-AL8866QSP-13

Bagong Produkto

Diodes Incorporated

LED Lighting Driver ICs LED MV Int Switch SO-8EP T&R 2.5K

Alamin Pa

Datasheet

6,624May Stock

Cut Tape

₱85.09

₱62.48

₱56.35

₱49.98

Reel

₱41.95

Tingnan

Min.: 1
Mult.: 1

: 2,500

1 Output

Buck, Boost, Buck-Boost

SO-8EP

85 V

4.7 V

400 kHz

AL8866Q

- 40 C

+ 150 C

Reel, Cut Tape

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

LP8865UQDMTRQ1
Texas Instruments
1: ₱111.86
2,672May Stock

Mfr. # ng Piyesa
LP8865UQDMTRQ1

# ng Piyesa ng Mouser
595-LP8865UQDMTRQ1

Texas Instruments

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

Alamin Pa

Datasheet

2,672May Stock

₱111.86

₱82.71

₱74.97

₱67.24

Tingnan

Min.: 1
Mult.: 1

1 Output

Boost

2 A

VSON-14

63 V

4.5 V

100 kHz to 2.2 MHz

0 V to 63 V

LP8865U

- 40 C

+ 125 C

High Precision Power FET Dimming

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

LP8865VQDMTRQ1
Texas Instruments
1: ₱130.31
2,829May Stock

Mfr. # ng Piyesa
LP8865VQDMTRQ1

# ng Piyesa ng Mouser
595-LP8865VQDMTRQ1

Texas Instruments

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

Alamin Pa

Datasheet

2,829May Stock

₱130.31

₱95.80

₱87.47

₱77.95

Tingnan

Min.: 1
Mult.: 1

1 Output

Boost, Buck

2 A

VSON-14

63 V

4.5 V

100 kHz to 2.2 MHz

0 V to 63 V

LP8865V

- 40 C

+ 125 C

High Precision Power FET Dimming

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

LP8865WQDMTRQ1
Texas Instruments
1: ₱116.03
2,775May Stock

Mfr. # ng Piyesa
LP8865WQDMTRQ1

# ng Piyesa ng Mouser
595-LP8865WQDMTRQ1

Texas Instruments

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

Alamin Pa

Datasheet

2,775May Stock

₱116.03

₱85.09

₱77.35

₱68.43

Tingnan

Min.: 1
Mult.: 1

1 Output

Buck

2 A

VSON-14

63 V

4.5 V

100 kHz to 2.2 MHz

0 V to 63 V

LP8865W

- 40 C

+ 125 C

High Precision Power FET Dimming

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

LP8865XQDMTRQ1
Texas Instruments
1: ₱117.22
2,365May Stock

Mfr. # ng Piyesa
LP8865XQDMTRQ1

# ng Piyesa ng Mouser
595-LP8865XQDMTRQ1

Texas Instruments

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

Alamin Pa

Datasheet

2,365May Stock

₱117.22

₱86.87

₱79.14

₱70.21

Tingnan

Min.: 1
Mult.: 1

1 Output

Boost

2 A

VSON-14

63 V

4.5 V

100 kHz to 2.2 MHz

0 V to 63 V

LP8865X

- 40 C

+ 125 C

High Precision Power FET Dimming

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

LP8868UQDMTRQ1
Texas Instruments
1: ₱147.56
2,072May Stock

Mfr. # ng Piyesa
LP8868UQDMTRQ1

# ng Piyesa ng Mouser
595-LP8868UQDMTRQ1

Texas Instruments

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

Alamin Pa

Datasheet

2,072May Stock

₱147.56

₱109.48

₱99.96

₱89.85

Tingnan

Min.: 1
Mult.: 1

1 Output

Boost

VSON-14

65 V

4.5 V

100 kHz to 2.2 MHz

0 V to 63 V

LP8868U

- 40 C

+ 125 C

Hybrid and Flexible Dimming

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

LP8868VQDMTRQ1
Texas Instruments
1: ₱163.03
2,982May Stock

Mfr. # ng Piyesa
LP8868VQDMTRQ1

# ng Piyesa ng Mouser
595-LP8868VQDMTRQ1

Texas Instruments

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

Alamin Pa

Datasheet

2,982May Stock

₱163.03

₱121.38

₱110.67

₱99.37

Tingnan

Min.: 1
Mult.: 1

1 Output

47 mA

VSON-14

65 V

4.5 V

100 kHz to 2.2 MHz

0 V to 63 V

LP8868V

- 40 C

+ 125 C

Hybrid and Flexible Dimming

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

LP8868WQDMTRQ1
Texas Instruments
1: ₱146.37
2,666May Stock

Mfr. # ng Piyesa
LP8868WQDMTRQ1

# ng Piyesa ng Mouser
595-LP8868WQDMTRQ1

Texas Instruments

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

Alamin Pa

Datasheet

2,666May Stock

₱146.37

₱108.29

₱98.77

₱88.06

Tingnan

Min.: 1
Mult.: 1

1 Output

Buck

VSON-14

65 V

4.5 V

100 kHz to 2.2 MHz

0 V to 63 V

LP8868W

- 40 C

+ 125 C

Hybrid and Flexible Dimming

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

LP8868XQDMTRQ1
Texas Instruments
1: ₱157.68
1,364May Stock

Mfr. # ng Piyesa
LP8868XQDMTRQ1

# ng Piyesa ng Mouser
595-LP8868XQDMTRQ1

Texas Instruments

LED Lighting Driver ICs FINISHED GOOD FOR KA NAS

Alamin Pa

Datasheet

1,364May Stock

₱157.68

₱117.22

₱107.10

₱96.39

Tingnan

Min.: 1
Mult.: 1

1 Output

Boost

VSON-14

65 V

4.5 V

100 kHz to 2.2 MHz

0 V to 63 V

LP8868X

- 40 C

+ 125 C

Hybrid and Flexible Dimming

Open Drain Mga LED Lighting Driver IC

Customer Service Office

Kumpanya

Mga Mapagkukunan

Suporta

5 mA to 40 mA
18.6 mA
20 mA
20 mA to 150 mA
25 mA
30 mA
30 mA, 50 mA
40 mA
47 mA
50 mA
60 mA
76.5 mA
85 mA
100 mA
120 mA
150 mA
200 mA
250 mA
300 mA
350 mA

DSBGA-12
HTSSOP-16
HTSSOP-24
HTSSOP-C-48
QFN-13
QFN-19
QFN-24
QFN-32
QFN-EP-24
SO-8EP
SOIC-16
SOIC-20
SOIC-28
SOIC-Narrow-16
SOT-23-6
SOT-23-THN-14
SOT26-6
SOT-26-6
SSOP-20
SSOP-36

3.3 V, 5 V
3.6 V
5.5 V
16 V
20 V
24 V
25 V
28 V
33 V
35 V
36 V
37 V
40 V
42 V
45 V
48 V
50 V
55 V
60 V
63 V

100 Hz to 200 Hz
200 Hz
200 Hz to 1 kHz
1 kHz
70 kHz to 700 kHz
100 kHz to 2.2 MHz
100 kHz to 900 kHz
140 kHz to 670 kHz
145 kHz to 600 kHz
150 kHz to 621 kHz
150 kHz to 630 kHz
200 kHz to 2 MHz
200 kHz to 2.2 MHz
200 kHz to 2.25 MHz
200 kHz to 2.42 MHz
235 kHz
250 kHz to 1 MHz
250 kHz to 2.2 MHz
280 kHz
400 kHz

A6271
A80803
AL580
AL5810Q
AL8866Q
ALED7707
CAT9532
LM3530
LP8864
LP8864S
LP8865U
LP8865V
LP8865W
LP8865X
LP8865Y
LP8866
LP8866S
LP8868U
LP8868V
LP8868W

3 Wire Serial Interface
AEC-Q100 Qualified
Brightness Control/Dimming
Built for Infrared (IR) LED Applications, Fault Indication, Integrated Current-Sense Resistor, Improved Efficiency and Thermals, Optimized for EMC/EMI, Over-Current Protection, Over-Voltage Protection
Constant Current, Constant Voltage
Cycle-by-Cycle Over-Current Protection, Fault Output, Integrated Switching FET, LED Open Detection, LED Short Detection, Programable Switching Frequency, Thermal Foldback, Thermal Shutdown
DC Dimming Function
High Precision Power FET Dimming
Hybrid and Flexible Dimming
I2C Control
I2C Control, PWM Control
Integrated MOSFET
Internal Maximum Duty Cycle Limit
LED Open Protection, LED Short Protection
PMW
PWM Dimming
PWM Dimming, I2C Control
PWM Dimming, Open LED Protection
PWM Dimming, Short Circuit and Thermal Protection
Thermal Shutdown