SC4215ASTRT
Semtech Corporation
IC REG LIN POS ADJ 2A 8SOIC
במלאי26845 pcs
50 µA
Positive
Enable
0.5V (0.5V, 1.2V)
3.8V
1
2A
0.4V @ 2A
-
Over Current, Over Temperature, Reverse Polarity
SC4215
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Adjustable (Fixed)
8-SOIC (0.154", 3.90mm Width) Exposed Pad
8-SOIC, EDP
3 mA
RFQ
NJM2884U1-15-TE1
Nisshinbo Micro Devices Inc.
IC REG LINEAR 1.5V 500MA SOT89-5
במלאי115390 pcs
300 µA
Positive
Enable
1.5V
-
1
500mA
-
75dB (1kHz)
Over Current, Over Temperature, Short Circuit
NJM2884
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
9V
Fixed
SOT-89-5/6
SOT-89-5
-
RFQ
LP3981ILD-2.83
Texas Instruments
IC REG LINEAR FIXED LDO REG
במלאי14260 pcs
120 µA
Positive
Enable
2.83V
-
1
300mA
0.2V @ 300mA
50dB ~ 55dB (1kHz ~ 10kHz)
Over Current, Over Temperature, Short Circuit
-
Bulk
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
6-WDFN Exposed Pad
6-WSON (3x4)
210 µA
RFQ
LM1117S-ADJ
Texas Instruments
IC REG LIN POS ADJ 800MA DDPAK
במלאי5940 pcs
5 mA
Positive
-
1.25V
13.8V
1
800mA
1.2V @ 800mA
75dB (120Hz)
Over Current, Over Temperature
LM1117
Tube
-
0°C ~ 125°C
Surface Mount
15V
Adjustable
TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
DDPAK/TO-263-3
10 mA
RFQ
TPS75933KC
Texas Instruments
IC REG LINEAR 3.3V 7.5A TO220-5
במלאי6839 pcs
200 µA
Positive
Enable, Power Good
3.3V
-
1
7.5A
0.75V @ 7.5A
58dB (100Hz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TPS75933
Tube
-
-40°C ~ 125°C
Through Hole
5.5V
Fixed
TO-220-5
TO-220-5
-
RFQ
TPS79301DBVR
Texas Instruments
IC REG LIN POS ADJ 200MA SOT23-6
במלאי184470 pcs
220 µA
Positive
Enable
1.22V
5.5V
1
200mA
-
70dB ~ 43dB (100Hz ~ 100kHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TPS79301
Tape & Reel (TR)
-
-40°C ~ 150°C
Surface Mount
5.5V
Adjustable
SOT-23-6
SOT-23-6
-
RFQ
TLV71330PDQNR
Texas Instruments
IC REG LINEAR 3V 150MA 4X2SON
במלאי503350 pcs
75 µA
Positive
Enable
3V
-
1
150mA
0.54V @ 150mA
70dB ~ 55dB (100Hz ~ 1MHz)
Over Current, Over Temperature, Reverse Polarity, Short Circuit, Under Voltage Lockout (UVLO)
TLV71330
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
4-XDFN Exposed Pad
4-X2SON (1x1)
-
RFQ
NCP4587DSN28T1G
onsemi
IC REG LINEAR 2.8V 150MA SOT23-5
במלאי16880 pcs
4 µA
Positive
Enable
2.8V
-
1
150mA
0.18V @ 150mA
70dB (1kHz)
Over Current
NCP4587
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.25V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
XC6209F252MR-G
Torex Semiconductor Ltd
IC REG LINEAR 2.5V 300MA SOT25
במלאי172800 pcs
50 µA
Positive
Enable
2.5V
-
1
300mA
0.29V @ 100mA
70dB (10kHz)
Over Current
XC6209
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
10V
Fixed
SC-74A, SOT-753
SOT-25-5
-
RFQ
NCV4276CDSADJR4G
onsemi
IC REG LIN POS ADJ 400MA D2PAK-5
במלאי19175 pcs
200 µA
Positive
-
2.5V
20V
1
400mA
0.5V @ 250mA
70dB (100Hz)
Over Temperature, Reverse Polarity, Short Circuit
NCV4276
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 150°C
Surface Mount
45V
Adjustable
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
D2PAK-5
35 mA
RFQ
MAX663CSA
Analog Devices Inc./Maxim Integrated
IC REG LIN POS ADJ 40MA 8SOIC
במלאי14210 pcs
15 µA
Positive
Current Limit, Enable
1.3V (5V)
16V
1
40mA
0.9V @ 40mA
-
-
MAX663
Tube
-
0°C ~ 70°C
Surface Mount
16.5V
Adjustable (Fixed)
8-SOIC (0.154', 3.90mm Width)
8-SOIC
-
RFQ
MC78LC33NTR
onsemi
IC REG LINEAR 3.3V 80MA 5TSOP
במלאי16500 pcs
3.6 µA
Positive
-
3.3V
-
1
80mA
0.053V @ 1mA
-
-
MC78LC3
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
12V
Fixed
SOT-23-5 Thin, TSOT-23-5
5-TSOP
-
RFQ
R1501J033B-T1-JE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 3.3V 1A TO252-5-P2
במלאי28791 pcs
160 µA
Positive
Enable
3.3V
-
1
1A
1.125V @ 1A
-
Over Current, Over Temperature, Short Circuit
R1501
Tape & Reel (TR)
Automotive, AEC-Q100, R1501x
-40°C ~ 105°C (TA)
Surface Mount
24V
Fixed
TO-252-6, DPak (5 Leads + Tab)
TO-252-5-P2
-
RFQ
LM340T-15
Texas Instruments
IC REG LINEAR 15V 1.5A TO220-3
במלאי25775 pcs
8 mA
Positive
-
15V
-
1
1.5A
2V @ 1A
80dB (120Hz)
Over Temperature, Short Circuit
LM340
Tube
-
0°C ~ 125°C
Through Hole
35V
Fixed
TO-220-3
TO-220-3
-
RFQ
ZSR500CSTZ
Diodes Incorporated
IC REG LINEAR 5V 200MA TO92-3
במלאי9150 pcs
600 µA
Positive
-
5V
-
1
200mA
-
62dB (120Hz)
Over Temperature, Short Circuit
ZSR500
Tape & Box (TB)
-
-55°C ~ 125°C
Through Hole
20V
Fixed
TO-226-3, TO-92-3 (TO-226AA) Formed Leads
TO-92
-
RFQ
LK112M15TR
STMicroelectronics
IC REG LINEAR 1.5V 150MA SOT23-5
במלאי98240 pcs
250 µA
Positive
Enable
1.5V
-
1
150mA
-
55dB (400Hz)
Over Current, Over Temperature
LK112
Tape & Reel (TR)
-
-30°C ~ 125°C
Surface Mount
14V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
REG103UA-A/2K5
Texas Instruments
IC REG LIN POS ADJ 500MA 8SOIC
במלאי14951 pcs
0.7 mA
Positive
Enable
1.295V
5.5V
1
500mA
0.28V @ 500mA
65dB (120Hz)
Over Current, Over Temperature
REG103
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
15V
Adjustable
8-SOIC (0.154", 3.90mm Width)
8-SOIC
1.3 mA
RFQ
LT3045EDD-1#PBF
Analog Devices Inc.
IC REG LIN POS PROG 500MA 12DFN
במלאי5980 pcs
20 µA
Positive
Enable, Power Good, Soft Start
0V
15V
1
500mA
0.45V @ 500mA
117dB ~ 53dB (120Hz ~ 10MHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
LT3045
Tube
-
-40°C ~ 125°C (TJ)
Surface Mount
20V
Adjustable
12-WFDFN Exposed Pad
12-DFN (3x3)
25 mA
RFQ
TPS76350DBVT
Texas Instruments
IC REG LINEAR 5V 150MA SOT23-5
במלאי38240 pcs
100 µA
Positive
Enable
5V
-
1
150mA
0.3V @ 150mA
60dB (1kHz)
Over Current, Over Temperature, Reverse Polarity
TPS76350
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
10V
Fixed
SC-74A, SOT-753
SOT-23-5
140 µA
RFQ
ISL80138IVEAJZ-T7A
Renesas Electronics America Inc
IC REG LIN POS ADJ 14HTSSOP
במלאי17116 pcs
24 µA
Positive
Enable
2.5V
12V
1
150mA
0.507V @ 150mA
66dB (100Hz)
Over Current, Over Temperature, Soft Start
ISL80138
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
40V
Adjustable
14-TSSOP (0.173', 4.40mm Width) Exposed Pad
14-HTSSOP
125 µA
RFQ
TLV71328PDQNR
Texas Instruments
IC REG LINEAR 2.8V 150MA 4X2SON
במלאי523250 pcs
75 µA
Positive
Enable
2.8V
-
1
150mA
0.57V @ 150mA
70dB ~ 55dB (100Hz ~ 1MHz)
Over Current, Over Temperature, Reverse Polarity, Short Circuit, Under Voltage Lockout (UVLO)
TLV71328
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
4-XDFN Exposed Pad
4-X2SON (1x1)
-
RFQ
TPS73601DRBR
Texas Instruments
IC REG LINEAR POS ADJ 400MA 8SON
במלאי25958 pcs
550 µA
Positive
Enable
1.2V
5.5V
1
400mA
0.2V @ 400mA
58dB ~ 37dB (100Hz ~ 10kHz)
Over Current, Over Temperature, Reverse Polarity
TPS73601
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Adjustable
8-VDFN Exposed Pad
8-SON (3x3)
1 mA
RFQ
RP131K101D-TR
Nisshinbo Micro Devices Inc.
IC REG LINEAR 1V 1A DFN1820-6
במלאי96850 pcs
90 µA
Positive
Enable
1V
-
1
1A
1.45V @ 1A
70dB (1kHz)
Over Current, Over Temperature
RP131
Tape & Reel (TR)
RP131x
-40°C ~ 85°C (TA)
Surface Mount
6.5V
Fixed
6-UFDFN Exposed Pad
DFN(PL)1820-6
-
RFQ
PAM3101DUB180
Diodes Incorporated
IC REG LINEAR 1.8V 300MA SC70-5
במלאי5230 pcs
90 µA
Positive
Enable
1.8V
-
1
300mA
1.1V @ 300mA
70dB ~ 65dB (100Hz ~ 1kHz)
Over Current, Over Temperature, Short Circuit
-
Bulk
-
-40°C ~ 85°C
Surface Mount
5.5V
Fixed
5-TSSOP, SC-70-5, SOT-353
SC-70-5
90 µA
RFQ
RT9053AZQW
Richtek USA Inc.
IC REG LIN POS ADJ 400MA 6WDFN
במלאי95100 pcs
50 µA
Positive
Enable
0.8V
5.15V
1
400mA
0.35V @ 400mA
56dB ~ 35dB (1kHz ~ 10kHz)
Over Current, Over Temperature
RT9053
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.5V
Adjustable
6-WDFN Exposed Pad
6-WDFN (2x2)
-
RFQ
REG1117
Texas Instruments
IC REG LIN POS ADJ 800MA SOT223
במלאי24005 pcs
10 mA
Positive
-
1.25V
13.5V
1
800mA
1.2V @ 800mA
62dB (120Hz)
Over Current, Over Temperature
REG1117
Tube
-
-40°C ~ 125°C
Surface Mount
15V
Adjustable
TO-261-4, TO-261AA
SOT-223-4
-
RFQ
MIC5202-3.3YM-TR
Microchip Technology
IC REG LINEAR 3.3V/3.3V 8SOIC
במלאי8869 pcs
1.5 mA
Positive
Enable
3.3V, 3.3V
-
2
100mA, 100mA
0.35V @ 100mA, 0.35V @ 100mA
-
Over Current, Over Temperature, Reverse Polarity
MIC5202
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
26V
Fixed
8-SOIC (0.154', 3.90mm Width)
8-SOIC
-
RFQ
AZ1117CH-2.5TRG1
Diodes Incorporated
IC REG LINEAR 2.5V 1A SOT223
במלאי377150 pcs
6 mA
Positive
-
2.5V
-
1
1A
1.3V @ 800mA
70dB (120Hz)
Thermal Shutdown
AZ1117
Tape & Reel (TR)
AZ1117C
-20°C ~ 125°C (TJ)
Surface Mount
15V
Fixed
TO-261-4, TO-261AA
SOT-223-3
-
RFQ
MCP1703AT-5002E/CB
Microchip Technology
IC REG LINEAR 5V 250MA SOT23A-3
במלאי57030 pcs
5 µA
Positive
-
5V
-
1
250mA
0.65V @ 250mA
35dB (100Hz)
Over Current, Over Temperature, Short Circuit
MCP1703
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
16V
Fixed
TO-236-3, SC-59, SOT-23-3
SOT-23A-3
-
RFQ
TLV70015DSET
Texas Instruments
IC REG LINEAR 1.5V 200MA 6WSON
במלאי64200 pcs
55 µA
Positive
Enable
1.5V
-
1
200mA
0.25V @ 200mA
68dB (1kHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TLV70015
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
6-WFDFN
6-WSON (1.5x1.5)
270 µA
RFQ
LD2980CU18TR
STMicroelectronics
IC REG LINEAR 1.8V 50MA SOT89-3
במלאי13780 pcs
150 µA
Positive
-
1.8V
-
1
50mA
0.225V @ 50mA
63dB (1kHz)
Over Current, Over Temperature
LD2980
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
TO-243AA
SOT-89-3
1.2 mA
RFQ
UC385TDKTTT-1
Texas Instruments
IC REG LIN 1.5V 5A DDPAK/TO263-5
במלאי17140 pcs
-
Positive
-
1.5V
-
1
5A
2.1V @ 5A
-
Over Temperature, Reverse Polarity, Short Circuit
UC385
Tape & Reel (TR)
-
0°C ~ 100°C
Surface Mount
7.5V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
DDPAK/TO-263-5
-
RFQ
L78M09ABV
STMicroelectronics
IC REG LINEAR 9V 500MA TO220AB
במלאי10860 pcs
6 mA
Positive
-
9V
-
1
500mA
-
56dB (120Hz)
Over Current, Over Temperature, Short Circuit
L78M09
Tube
-
-40°C ~ 125°C
Through Hole
35V
Fixed
TO-220-3
TO-220
-
RFQ
L79L05ACD
STMicroelectronics
IC REG LINEAR -5V 100MA 8SO
במלאי12980 pcs
5.5 mA
Negative
-
-5V
-
1
100mA
-
49dB (120Hz)
Over Temperature, Short Circuit
L79L05
Tube
-
0°C ~ 125°C
Surface Mount
-30V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SOIC
6 mA
RFQ
LT1761ES5-SD#TRMPBF
Analog Devices Inc.
IC REG LIN POS ADJ 100MA TSOT23
במלאי11701 pcs
-
Positive
Enable
1.22V
20V
1
100mA
0.45V @ 100mA
65dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT1761
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
20V
Adjustable
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
-
RFQ
ADP160AUJZ-1.5-R7
Analog Devices Inc.
IC REG LINEAR 1.5V 150MA TSOT5
במלאי57070 pcs
1.25 µA
Positive
Enable
1.5V
-
1
150mA
-
-
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
ADP160
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
65 µA
RFQ
BU13TD3WG-GTR
Rohm Semiconductor
IC REG LINEAR 1.3V 200MA 5SSOP
במלאי279210 pcs
60 µA
Positive
Enable
1.3V
-
1
200mA
0.9V @ 200mA
70dB (1kHz)
Over Current, Over Temperature
BU13TD3
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Fixed
SC-74A, SOT-753
5-SSOP
-
RFQ
TPS79328YEQT
Texas Instruments
IC REG LINEAR 2.8V 200MA 5DSBGA
במלאי8980 pcs
220 µA
Positive
Enable
2.8V
-
1
200mA
0.2V @ 200mA
70dB ~ 43dB (100Hz ~ 100kHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TPS793
Tube
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
5-UFBGA, DSBGA
5-DSBGA NanoStar™
-
RFQ
TLV1117IKTER
Texas Instruments
IC REG LIN POS ADJ 800MA 3PWRFLX
במלאי9590 pcs
-
Positive
-
1.25V
13.7V
1
800mA
1.3V @ 800mA
75dB (120Hz)
Over Current, Over Temperature
TLV111
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
15V
Adjustable
TO-252-4, DPak (3 Leads + Tab)
3-PowerFLEX™
-
RFQ
TLE4276GV85
Infineon Technologies
IC REG LINEAR FIXED LDO REG
במלאי10090 pcs
200 µA
Positive
Inhibit
8.5V
-
1
400mA
0.5V @ 250mA
54dB (100Hz)
Antisaturation, Over Current, Over Temperature, Reverse Polarity, Short Circuit
-
Bulk
Automotive, AEC-Q100, AEC-Q101, OPTIREG™
-40°C ~ 150°C (TJ)
Surface Mount
40V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
PG-TO263-5-1
25 mA
RFQ
MAX1982EUT+T
Analog Devices Inc./Maxim Integrated
IC REG LINEAR 1.2V 300MA SOT23-6
במלאי26338 pcs
250 µA
Positive
Enable, Power Good
1.2V
-
1
300mA
0.35V @ 300mA
60dB (10kHz)
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
MAX1982
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Fixed
SOT-23-6
SOT-6
-
RFQ
TPS70927DBVT
Texas Instruments
IC REG LINEAR 2.7V 150MA SOT23-5
במלאי37382 pcs
2.05 µA
Positive
Enable
2.7V
-
1
150mA
-
80dB ~ 52dB (10Hz ~ 1kHz)
Over Current, Over Temperature, Reverse Current, Under Voltage Lockout (UVLO)
TPS70927
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
30V
Fixed
SC-74A, SOT-753
SOT-23-5
350 µA
RFQ
NCP512SQ31T1G
onsemi
IC REG LINEAR 3.1V 80MA SC88A
במלאי13770 pcs
1 µA
Positive
Enable
3.1V
-
1
80mA
0.3V @ 80mA
50dB (1kHz)
Over Current, Over Temperature
NCP512
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Fixed
5-TSSOP, SC-70-5, SOT-353
SC-88A (SC-70-5/SOT-353)
90 µA
RFQ
KA7809ETU
onsemi
IC REG LINEAR 9V 1A TO220-3
במלאי7300 pcs
8 mA
Positive
-
9V
-
1
1A
2V @ 1A (Typ)
71dB (120Hz)
Over Temperature, Short Circuit
KA7809
Tube
-
-40°C ~ 125°C
Through Hole
35V
Fixed
TO-220-3
TO-220-3
-
RFQ
AP7315D-185W5-7
Diodes Incorporated
IC REG LINEAR 1.85V 150MA SOT25
במלאי263810 pcs
60 µA
Positive
Enable
1.85V
-
1
150mA
0.44V @ 150mA
75dB (1kHz)
Over Current
AP7315
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.25V
Fixed
SC-74A, SOT-753
SOT-25
100 µA
RFQ
CS5204-3GDPR3
onsemi
IC REG LINEAR 3.3V 4A D2PAK-3
במלאי4310 pcs
10 mA
Positive
-
3.3V
-
1
4A
1.2V @ 4A
75dB (120Hz)
Over Current, Over Temperature
CS5204
Tape & Reel (TR)
-
0°C ~ 70°C
Surface Mount
17V
Fixed
TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
D2PAK-3
-
RFQ
LT1963EST-1.8#PBF
Analog Devices Inc.
IC REG LINEAR 1.8V 1.5A SOT223-3
במלאי7164 pcs
1.5 mA
Positive
Enable
1.8V
-
1
1.5A
0.55V @ 1.5A
63dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT1963
Tube
-
-40°C ~ 125°C
Surface Mount
20V
Fixed
TO-261-4, TO-261AA
SOT-223-3
120 mA
RFQ
LM7815ACT
onsemi
IC REG LINEAR 15V 1A TO220-3
במלאי7950 pcs
8 mA
Positive
-
15V
-
1
1A
2V @ 1A (Typ)
70dB (120Hz)
Over Temperature, Short Circuit
LM7815
Tube
-
0°C ~ 125°C
Through Hole
35V
Fixed
TO-220-3
TO-220-3
-
RFQ
LE80ABZ
STMicroelectronics
IC REG LINEAR 8V 100MA TO92-3
במלאי13880 pcs
1.6 mA
Positive
-
8V
-
1
100mA
0.5V @ 100mA
72dB ~ 57dB (120Hz ~ 10kHz)
Over Current, Over Temperature
LE80
Bulk
-
-40°C ~ 125°C
Through Hole
18V
Fixed
TO-226-3, TO-92-3 (TO-226AA)
TO-92-3
3.6 mA
RFQ
TLV70025DCKR
Texas Instruments
IC REG LINEAR 2.5V 200MA SC70-5
במלאי397900 pcs
55 µA
Positive
Enable
2.5V
-
1
200mA
0.25V @ 200mA
68dB (1kHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TLV70025
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
5-TSSOP, SC-70-5, SOT-353
SC-70-5
270 µA
RFQ