FAN25800AUCF27X
Fairchild Semiconductor
IC REG LINEAR 2.7V 500MA 4WLCSP
स्टॉक में6550 pcs
25 µA
Positive
Enable
2.7V
-
1
500mA
0.13V @ 250mA
85dB ~ 68dB (100Hz ~ 50Hz)
Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
-
Bulk
-
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Fixed
4-XFBGA, WLCSP
4-WLCSP (0.65x0.65)
-
RFQ
S-1170B35UC-OTUTFG
ABLIC Inc.
IC REG LINEAR 3.5V 800MA SOT89-5
स्टॉक में68320 pcs
1 µA
Positive
Enable
3.5V
-
1
800mA
0.18V @ 300mA
65dB (1kHz)
Over Current, Thermal Shutdown
S-1170
Tape & Reel (TR)
S-1170
-40°C ~ 85°C (TA)
Surface Mount
6.5V
Fixed
SOT-89-5/6
SOT-89-5
160 µA
RFQ
TPS75815KTTT
Texas Instruments
IC REG LIN 1.5V 3A DDPAK/TO263-5
स्टॉक में16750 pcs
200 µA
Positive
Enable
1.5V
-
1
3A
-
62dB (100Hz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TPS758
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
DDPAK/TO-263-5
-
RFQ
LP3855ET-3.3
Texas Instruments
IC REG LINEAR 3.3V 1.5A TO220-5
स्टॉक में8580 pcs
3 mA
Positive
Enable
3.3V
-
1
1.5A
0.38V @ 1.5A
73dB ~ 57dB (120Hz)
Over Current, Over Temperature, Short Circuit
LP3855
Tube
-
-40°C ~ 125°C
Through Hole
7V
Fixed
TO-220-5 Formed Leads
TO-220-5
10 mA
RFQ
MC7906CD2TG
onsemi
IC REG LINEAR -6V 1A D2PAK
स्टॉक में14390 pcs
-
Negative
-
-6V
-
1
1A
1.3V @ 1A (Typ)
65dB (120Hz)
Over Current, Over Temperature
MC7906
Tube
-
0°C ~ 125°C
Surface Mount
-35V
Fixed
TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
D2PAK-3
-
RFQ
PQ015EH02ZPH
Sharp Microelectronics
IC REG LINEAR 1.5V 2A TO263
स्टॉक में90150 pcs
-
-
-
-
-
-
-
-
-
-
-
Cut Tape (CT)
*
-
-
-
-
-
-
-
RFQ
L7824ABV-DG
STMicroelectronics
IC REG LINEAR 24V 1.5A TO220
स्टॉक में38006 pcs
6 mA
Positive
-
24V
-
1
1.5A
2V @ 1A (Typ)
54dB (120Hz)
Over Temperature, Short Circuit
L7824
Tube
-
-40°C ~ 125°C
Through Hole
40V
Fixed
TO-220-3
TO-220
-
RFQ
AP1084T50L-U
Diodes Incorporated
IC REG LINEAR 5V 5A TO220-3
स्टॉक में17290 pcs
10 mA
Positive
-
5V
-
1
5A
1.4V @ 5A
-
Over Current, Over Temperature
AP1084
Tube
-
0°C ~ 125°C (TJ)
Through Hole
12V
Fixed
TO-220-3
TO-220-3
-
RFQ
LD39300DT18-R
STMicroelectronics
IC REG LINEAR 1.8V 3A DPAK
स्टॉक में7610 pcs
5 µA
Positive
Enable
1.8V
-
1
3A
0.4V @ 3A
65dB ~ 55dB (120Hz ~ 1kHz)
Over Current, Over Temperature
LD39300
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
DPAK
2.5 mA
RFQ
TLV70430DBVT
Texas Instruments
IC REG LINEAR 3V 150MA SOT23-5
स्टॉक में47250 pcs
4.5 µA
Positive
-
3V
-
1
150mA
1.1V @ 100mA
60dB (100kHz)
Over Current, Reverse Polarity
TLV70430
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
24V
Fixed
SC-74A, SOT-753
SOT-23-5
5.5 µA
RFQ
LT3050IMSE#PBF
Analog Devices Inc.
IC REG LIN POS ADJ 100MA 12MSOP
स्टॉक में14088 pcs
90 µA
Positive
Current Limit, Enable, Soft Start
0.6V
44.5V
1
100mA
0.55V @ 100mA
85dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT3050
Tube
-
-40°C ~ 125°C
Surface Mount
45V
Adjustable
12-TSSOP (0.118", 3.00mm Width) Exposed Pad
12-MSOP-EP
5.2 mA
RFQ
MIC39100-3.3BS
Microchip Technology
IC REG LINEAR 3.3V 1A SOT223-3
स्टॉक में16060 pcs
-
Positive
-
3.3V
-
1
1A
0.63V @ 1A
-
Over Current, Over Temperature, Reverse Polarity
MIC39100-3.3
Tube
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
TO-261-4, TO-261AA
SOT-223-3
-
RFQ
AZ1117ID-1.2TRG1
Diodes Incorporated
IC REG LINEAR 1.2V 1A TO252-2
स्टॉक में236720 pcs
6 mA
Positive
-
1.2V
-
1
1A
1.4V @ 800mA
70dB (120Hz)
Thermal Shutdown
AZ1117
Tape & Reel (TR)
AZ1117I
-40°C ~ 125°C (TJ)
Surface Mount
15V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252-3
-
RFQ
R1172D121B-TR-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 1.2V 1A HSON6
स्टॉक में80910 pcs
100 µA
Positive
Enable
1.2V
-
1
1A
0.56V @ 1A
70dB (1kHz)
Over Current, Over Temperature
R1172
Tape & Reel (TR)
R1172x
-40°C ~ 85°C
Surface Mount
6V
Fixed
6-SMD, Flat Lead Exposed Pad
6-HSON (2.9x2.8)
-
RFQ
RP102N151D-TR-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 1.5V 300MA SOT23-5
स्टॉक में96940 pcs
70 µA
Positive
Enable
1.5V
-
1
300mA
0.32V @ 300mA
80dB (1kHz)
Over Current
RP102
Tape & Reel (TR)
RP102x
-40°C ~ 85°C
Surface Mount
5.25V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
BA040LBSG-TR
Rohm Semiconductor
IC REG LINEAR 4V 150MA SMP5
स्टॉक में7540 pcs
150 µA
Positive
Enable
4V
-
1
150mA
0.15V @ 50mA
66dB ~ 56dB (400Hz)
Over Current, Over Temperature
-
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
7V
Fixed
SC-74A, SOT-753
SMP5
-
RFQ
TPS76750QPWPRQ1
Texas Instruments
IC REG LINEAR 5V 1A 20HTSSOP
स्टॉक में14502 pcs
125 µA
Positive
Enable, Reset
5V
-
1
1A
0.38V @ 1A
60dB (1kHz)
Over Current, Over Temperature, Reverse Polarity
TPS76750
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
10V
Fixed
20-PowerTSSOP (0.173', 4.40mm Width)
20-HTSSOP
-
RFQ
LE50ABD
STMicroelectronics
IC REG LINEAR 5V 100MA 8SO
स्टॉक में15380 pcs
1 mA
Positive
Enable
5V
-
1
100mA
0.5V @ 100mA
76dB ~ 60dB (120Hz ~ 10kHz)
Over Current, Over Temperature
LE50
Tube
-
-40°C ~ 125°C
Surface Mount
18V
Fixed
8-SOIC (0.154', 3.90mm Width)
8-SOIC
3 mA
RFQ
KA7905TU
onsemi
IC REG LINEAR -5V 1A TO220-3
स्टॉक में8760 pcs
6 mA
Negative
-
-5V
-
1
1A
2V @ 1A (Typ)
60dB (120Hz)
Over Temperature, Short Circuit
KA79
Tube
-
0°C ~ 125°C
Through Hole
-35V
Fixed
TO-220-3
TO-220-3
-
RFQ
S-814A26AMC-BCQT2G
ABLIC Inc.
IC REG LINEAR 2.6V 100MA SOT23-5
स्टॉक में97240 pcs
500 nA
Positive
Enable
2.6V
-
1
100mA
0.61V @ 60mA
45dB (100Hz)
Short Circuit
S-814
Tape & Reel (TR)
S-814
-40°C ~ 85°C (TA)
Surface Mount
10V
Fixed
SC-74A, SOT-753
SOT-23-5
40 µA
RFQ
MIC39300-1.8BU
Microchip Technology
IC REG LINEAR 1.8V 3A TO263-3
स्टॉक में10620 pcs
-
Positive
-
1.8V
-
1
3A
0.55V @ 3A
-
Over Current, Over Temperature, Reverse Polarity
MIC39300-1.8
Tube
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
TO-263-3
-
RFQ
TPS73133DBVT
Texas Instruments
IC REG LINEAR 3.3V 150MA SOT23-5
स्टॉक में43590 pcs
550 µA
Positive
Enable
3.3V
-
1
150mA
0.1V @ 150mA
58dB ~ 37dB (100Hz ~ 10kHz)
Over Current, Over Temperature, Short Circuit, Reverse Polarity
TPS73133
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
750 µA
RFQ
AP7340-18FS4-7
Diodes Incorporated
IC REG LINEAR 1.8V 150MA 4DFN
स्टॉक में10280 pcs
50 µA
Positive
Enable
1.8V
-
1
150mA
0.42V @ 150mA
75dB (1kHz)
Over Current
AP7340
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.25V
Fixed
4-XDFN Exposed Pad
X2-DFN1010-4
100 µA
RFQ
R1121N251B-TR-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 2.5V 150MA SOT23-5
स्टॉक में141080 pcs
70 µA
Positive
Enable
2.5V
-
1
150mA
0.35V @ 100mA
70dB (1kHz)
Over Current
R1121
Tape & Reel (TR)
R1121N
-40°C ~ 85°C
Surface Mount
8V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
LP2981-30DBVRG4
Texas Instruments
IC REG LINEAR 3V 100MA SOT23-5
स्टॉक में13070 pcs
95 µA
Positive
Enable
3V
-
1
100mA
0.37V @ 100mA
63dB (1kHz)
Over Current, Over Temperature, Short Circuit
LP2981
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
1.7 mA
RFQ
AZ1117CD-ADJTRG1
Diodes Incorporated
IC REG LINEAR POS ADJ 1A TO252-3
स्टॉक में312590 pcs
5 mA
Positive
-
1.25V
13.6V
1
1A
1.4V @ 800mA
70dB (120Hz)
Thermal Shutdown
AZ1117
Tape & Reel (TR)
AZ1117C
-20°C ~ 125°C (TJ)
Surface Mount
15V
Adjustable
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252-3
-
RFQ
NCV8187AMT180TAG
onsemi
IC REG LINEAR 1.8V 1.2A 6WDFN
स्टॉक में104990 pcs
45 µA
Positive
Enable, Power Good
1.8V
-
1
1.2A
0.335V @ 1.2A
75dB (1kHz)
Over Current, Over Temperature, Soft Start
NCV8187
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 150°C (TJ)
Surface Mount
5.5V
Fixed
6-WDFN Exposed Pad
6-WDFN (2x2)
-
RFQ
LP3985IBL-2.6
Texas Instruments
IC REG LINEAR 2.6V 150MA 5DSBGA
स्टॉक में6980 pcs
150 µA
Positive
Enable
2.6V
-
1
150mA
0.1V @ 150mA
50dB ~ 40dB (1kHz ~ 10kHz)
Over Current, Over Temperature, Short Circuit
LP3985
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
5-WFBGA, DSBGA
5-DSBGA (1.41x1.08)
250 µA
RFQ
ISL80112IRAJZ
Renesas Electronics America Inc
IC REG LINEAR POS ADJ 2A 10DFN
स्टॉक में35630 pcs
10 mA
Positive
Enable, Power Good
0.8V
3.3V
1
2A
1.4V @ 2A
80dB ~ 60dB (120Hz)
Over Current, Over Temperature
ISL80112
Tube
-
-40°C ~ 125°C (TJ)
Surface Mount
3.6V
Adjustable
10-VFDFN Exposed Pad
10-DFN (3x3)
-
RFQ
KA278R05CTU
onsemi
IC REG LINEAR 5V 2A TO220F-4L
स्टॉक में11930 pcs
10 mA
Positive
-
5V
-
1
2A
0.5V @ 2A
-
Over Current, Over Temperature, Over Voltage, Short Circuit
KA278
Tube
-
-20°C ~ 80°C
Through Hole
35V
Fixed
TO-220-4 Full Pack
TO-220F-4L
-
RFQ
LP2951CDM-3.3R2G
onsemi
IC REG LINEAR 3.3V 100MA MICRO8
स्टॉक में5130 pcs
120 µA
Positive
-
3.3V
-
1
100mA
0.45V @ 100mA
-
Over Current, Over Temperature
LP2951
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
30V
Fixed
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-MSOP
12 mA
RFQ
TPS78233DDCT
Texas Instruments
IC REG LINEAR 3.3V 150MA SOT23-5
स्टॉक में56130 pcs
1.3 µA
Positive
Enable
3.3V
-
1
150mA
0.25V @ 150mA
40dB ~ 15dB (10Hz ~ 1kHz)
Over Current, Over Temperature, Reverse Polarity
TPS78233
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
SOT-23-THIN
8 µA
RFQ
KA7905ATU
onsemi
IC REG LINEAR -5V 1A TO220-3
स्टॉक में9610 pcs
6 mA
Negative
-
-5V
-
1
1A
2V @ 1A (Typ)
60dB (120Hz)
Over Temperature, Short Circuit
KA79
Tube
-
0°C ~ 125°C
Through Hole
-35V
Fixed
TO-220-3
TO-220-3
-
RFQ
UA78L10ACDR
Texas Instruments
IC REG LINEAR 10V 100MA 8SOIC
स्टॉक में235980 pcs
-
Positive
-
10V
-
1
100mA
1.7V @ 40mA
44dB (120Hz)
Over Current, Over Temperature, Reverse Polarity, Short Circuit
UA78L10
Tape & Reel (TR)
-
0°C ~ 125°C
Surface Mount
25V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SOIC
-
RFQ
TLV70235DBVR
Texas Instruments
IC REG LINEAR 3.5V 300MA SOT23-5
स्टॉक में146560 pcs
55 µA
Positive
Enable
3.5V
-
1
300mA
0.38V @ 300mA
68dB (1kHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TLV70235
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
370 µA
RFQ
LT3042HDD#TRPBF
Analog Devices Inc.
IC REG LIN POS ADJ 200MA 10DFN
स्टॉक में7118 pcs
-
Positive
Current Limit, Enable, Power Good
0V
15V
1
200mA
0.35V @ 200mA (Typ)
117dB ~ 56dB (120Hz ~ 10MHz)
Over Temperature, Reverse Polarity
LT3042
Tape & Reel (TR)
-
-40°C ~ 150°C
Surface Mount
20V
Adjustable
10-WFDFN Exposed Pad
10-DFN (3x3)
-
RFQ
ADP1710AUJZ-2.5-R7
Analog Devices Inc.
IC REG LINEAR 2.5V 150MA TSOT5
स्टॉक में55940 pcs
50 µA
Positive
Enable
2.5V
-
1
150mA
0.3V @ 150mA
58dB (1kHz)
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
ADP1710
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
1.3 mA
RFQ
NCV1117ST25T3G
onsemi
IC REG LINEAR 2.5V 1A SOT223
स्टॉक में138880 pcs
10 mA
Positive
-
2.5V
-
1
1A
1.2V @ 800mA
68dB (120Hz)
Over Current, Over Temperature
NCV1117
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C (TA)
Surface Mount
20V
Fixed
TO-261-4, TO-261AA
SOT-223
-
RFQ
LM79L05ACZ
onsemi
IC REG LINEAR -5V 100MA TO92-3
स्टॉक में11960 pcs
5.5 mA
Negative
-
-5V
-
1
100mA
-
60dB (120Hz)
Over Temperature, Short Circuit
LM79L
Bulk
-
0°C ~ 125°C
Through Hole
-30V
Fixed
TO-226-3, TO-92-3 (TO-226AA)
TO-92-3
6 mA
RFQ
TPS76130DBVR
Texas Instruments
IC REG LINEAR 3V 100MA SOT23-5
स्टॉक में49930 pcs
115 µA
Positive
Enable
3V
-
1
100mA
0.28V @ 100mA
63dB (1kHz)
Over Current, Over Temperature, Reverse Polarity, Transient Voltage
TPS76130
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
4 mA
RFQ
MAX8868EUK33+T
Analog Devices Inc./Maxim Integrated
IC REG LINEAR 3.3V 150MA SOT23-5
स्टॉक में40480 pcs
180 µA
Positive
Enable
3.3V
-
1
150mA
0.165V @ 150mA (Typ)
63dB (10kHz)
Over Current, Over Temperature, Reverse Polarity, Short Circuit
MAX8868
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
6.5V
Fixed
SC-74A, SOT-753
SOT-23-5
100 µA
RFQ
LP3856ET-3.3
Texas Instruments
IC REG LINEAR 3.3V 3A TO220-5
स्टॉक में5050 pcs
4 mA
Positive
Enable
3.3V
-
1
3A
0.6V @ 3A
73dB ~ 57dB (120Hz)
Over Current, Over Temperature, Short Circuit
LP3856
Tube
-
-40°C ~ 125°C
Through Hole
7V
Fixed
TO-220-5 Formed Leads
TO-220-5
10 mA
RFQ
MAX8888EZK18/V+T
Analog Devices Inc./Maxim Integrated
IC REG LIN 1.8V 300MA TSOT23-5
स्टॉक में3800 pcs
100 µA
Positive
Enable, Power Good
1.8V
-
1
300mA
-
40dB (1kHz)
Over Current, Over Temperature, Short Circuit
MAX8888
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
65 µA
RFQ
AZ1117IH-ADJTRG1
Diodes Incorporated
IC REG LINEAR POS ADJ 1A SOT223
स्टॉक में304940 pcs
5 mA
Positive
-
1.25V
13.7V
1
1A
1.3V @ 800mA
70dB (120Hz)
Thermal Shutdown
AZ1117
Tape & Reel (TR)
AZ1117I
-40°C ~ 125°C (TJ)
Surface Mount
15V
Adjustable
TO-261-4, TO-261AA
SOT-223-3
-
RFQ
BD12IC0WEFJ-E2
Rohm Semiconductor
IC REG LINEAR 1.2V 1A 8HTSOP
स्टॉक में120280 pcs
0.25 mA
Positive
Enable
1.2V
-
1
1A
0.6V @ 1A
-
Over Current, Over Temperature, Soft Start
BD12IC0
Tape & Reel (TR)
-
-25°C ~ 85°C
Surface Mount
5.5V
Fixed
8-SOIC (0.154', 3.90mm Width) Exposed Pad
8-HTSOP-J
500 µA
RFQ
TPS75725KTT
Texas Instruments
IC REG LDO 2.5V 3A DDPAK-5
स्टॉक में12245 pcs
200 µA
Positive
Enable, Power Good
2.5V
-
1
3A
-
62dB (100Hz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TPS757
Tube
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
DDPAK/TO-263-5
-
RFQ
BH28FB1WG-TR
Rohm Semiconductor
IC REG LINEAR 2.8V 150MA 5SSOP
स्टॉक में134870 pcs
70 µA
Positive
Enable
2.8V
-
1
150mA
0.45V @ 100mA
70dB (1kHz)
Over Current, Over Temperature
BH28FB1
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
5-SSOP
-
RFQ
NCV4269APD50R2G
onsemi
IC REG LINEAR 5V 150MA 8SOIC
स्टॉक में10480 pcs
250 µA
Positive
Reset
5V
-
1
150mA
0.5V @ 100mA
-
Over Temperature, Reverse Polarity, Short Circuit
NCV4269
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
45V
Fixed
8-SOIC (0.154", 3.90mm Width) Exposed Pad
8-SOIC-EP
3 mA
RFQ
AP2138R-1.8TRG1
Diodes Incorporated
IC REG LINEAR 1.8V 250MA SOT89
स्टॉक में3640 pcs
1.5 µA
Positive
-
1.8V
-
1
250mA
1.1V @ 250mA
-
Over Current
AP2138
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Fixed
TO-243AA
SOT-89-3
-
RFQ
RP132S301B-E2-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 3V 1A 6HSOP
स्टॉक में73910 pcs
85 µA
Positive
Enable
3V
-
1
1A
0.72V @ 1A
70dB (1kHz)
Over Current, Over Temperature
RP132
Tape & Reel (TR)
RP132x
-40°C ~ 85°C (TA)
Surface Mount
6.5V
Fixed
6-SOIC Variation (0.154", 3.90mm Width), 4 Leads + 2 Fins
6-HSOP-J
-
RFQ