S-812C56AUA-C3KT2G
ABLIC Inc.
IC REG LINEAR 5.6V 75MA SOT89-3
В наявності72740 pcs
500 nA
Positive
-
5.6V
-
1
75mA
0.23V @ 100mA
-
-
S-812
Tape & Reel (TR)
S-812C
-40°C ~ 85°C (TA)
Surface Mount
16V
Fixed
TO-243AA
SOT-89-3
2.5 µA
RFQ
BD733L5FP-CE2
Rohm Semiconductor
IC REG LINEAR 3.3V 500MA TO252-3
В наявності22420 pcs
6 µA
Positive
-
3.3V
-
1
500mA
0.8V @ 200mA
63dB (120Hz)
Over Current, Over Temperature
BD733
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
45V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252
15 µA
RFQ
TPS75133QPWPR
Texas Instruments
IC REG LINEAR 3.3V 1.5A 20HTSSOP
В наявності12661 pcs
125 µA
Positive
Enable, Power Good, Reset Output
3.3V
-
1
1.5A
0.3V @ 1.5A
63dB (100Hz)
Over Current, Over Temperature, Reverse Polarity
TPS75133
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
20-PowerTSSOP (0.173", 4.40mm Width)
20-HTSSOP
-
RFQ
TLE4254GSXUMA4
Infineon Technologies
IC REG LINEAR POS ADJ 70MA 8DSO
В наявності34760 pcs
80 µA
Positive
Enable
Tracking
-
1
70mA
0.4V @ 70mA
60dB (100Hz)
Over Temperature, Reverse Polarity, Short Circuit
TLE4254
Tape & Reel (TR)
Automotive, AEC-Q100, OPTIREG™
-40°C ~ 150°C
Surface Mount
45V
Adjustable
8-SOIC (0.154', 3.90mm Width)
PG-DSO-8
15 mA
RFQ
LD1117S33CTR
STMicroelectronics
IC REG LINEAR 3.3V 800MA SOT223
В наявності150350 pcs
10 mA
Positive
-
3.3V
-
1
800mA
1.3V @ 800mA
75dB (120Hz)
Over Current, Over Temperature
LD1117
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
15V
Fixed
TO-261-4, TO-261AA
SOT-223
-
RFQ
MP20051DN-LF
Monolithic Power Systems Inc.
IC REG LINEAR POS ADJ 1A 8SOICE
В наявності5010 pcs
600 µA
Positive
Enable
0.8V
5V
1
1A
0.28V @ 1A
65dB ~ 33dB (100Hz ~ 1MHz)
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
MP20051
Tube
-
-40°C ~ 125°C
Surface Mount
5.5V
Adjustable
8-SOIC (0.154', 3.90mm Width) Exposed Pad
8-SOICE
-
RFQ
RT9073A-33GQZ
Richtek USA Inc.
IC REG LINEAR 3.3V 250MA 4ZQFN
В наявності181250 pcs
3 µA
Positive
Enable
3.3V
-
1
250mA
0.6V @ 250mA
75dB (1kHz)
Over Current, Over Temperature
RT9073
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Fixed
4-XDFN Exposed Pad
4-ZQFN (1x1)
-
RFQ
ADP3338AKC-2.5-RL
Analog Devices Inc.
IC REG LDO 1A PREC 2.5V SOT-223
В наявності15701 pcs
190 µA
Positive
-
2.5V
-
1
1A
0.4V @ 1A
-
Over Current, Over Temperature
ADP3338
Bulk
anyCAP®
-40°C ~ 85°C (TA)
Surface Mount
8V
Fixed
TO-261-4, TO-261AA
SOT-223-3
30 mA
RFQ
MP20045DN-25-LF-Z
Monolithic Power Systems Inc.
IC REG LINEAR 2.5V 1A 8SOIC
В наявності16060 pcs
110 µA
Positive
Enable, Power Good
2.5V
-
1
1A
0.28V @ 1A
56dB (1kHz)
Over Current, Over Temperature
-
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
8-SOIC (0.154", 3.90mm Width) Exposed Pad
8-SOICE
-
RFQ
S-812C51AUA-C3FT2G
ABLIC Inc.
IC REG LINEAR 5.1V 75MA SOT89-3
В наявності52570 pcs
500 nA
Positive
-
5.1V
-
1
75mA
0.25V @ 10mA
-
-
S-812
Tape & Reel (TR)
S-812C
-40°C ~ 85°C (TA)
Surface Mount
16V
Fixed
TO-243AA
SOT-89-3
2.1 µA
RFQ
LT1762EMS8-5#PBF
Analog Devices Inc.
IC REG LINEAR 5V 150MA 8MSOP
В наявності18159 pcs
-
Positive
Enable
5V
-
1
150mA
0.4V @ 150mA
65dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT1762
Tube
-
-40°C ~ 125°C
Surface Mount
20V
Fixed
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
8-MSOP
-
RFQ
NCP502SQ15T1G
onsemi
IC REG LINEAR 1.5V 80MA SC88A
В наявності5880 pcs
40 µA
Positive
Enable
1.5V
-
1
80mA
1.9V @ 80mA
55dB (1kHz)
Over Current, Over Temperature
NCP502
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
12V
Fixed
5-TSSOP, SC-70-5, SOT-353
SC-88A (SC-70-5/SOT-353)
90 µA
RFQ
SPX29300T-L-3-3
MaxLinear, Inc.
IC REG LINEAR 3.3V 3A TO263-3
В наявності17770 pcs
-
Positive
-
3.3V
-
1
3A
0.8V @ 3A
-
Over Current, Reverse Polarity, Transient Voltage
-
Tube
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
TO-263-3
-
RFQ
TPS75718KTTT
Texas Instruments
IC REG LIN 1.8V 3A DDPAK/TO263-5
В наявності4945 pcs
200 µA
Positive
Enable, Power Good
1.8V
-
1
3A
-
62dB (100Hz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TPS757
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
MC33269D-3.3
onsemi
IC REG LINEAR 3.3V 800MA 8SOIC
В наявності10450 pcs
8 mA
Positive
-
3.3V
-
1
800mA
1.35V @ 800mA
55dB (120Hz)
Over Temperature, Short Circuit
MC33269
Tube
-
-40°C ~ 125°C
Surface Mount
20V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SOIC
-
RFQ
LM140K-15
Texas Instruments
IC REG LINEAR 15V 1A TO3-2
В наявності399 pcs
6 mA
Positive
-
15V
-
1
1A
2V @ 1A
70dB (120Hz)
Over Temperature, Short Circuit
LM140
Box
-
-55°C ~ 125°C
Through Hole
35V
Fixed
TO-204AA, TO-3
TO-3-2
-
RFQ
LT3085EDCB#TRMPBF
Analog Devices Inc.
IC REG LINEAR POS ADJ 500MA 6DFN
В наявності10469 pcs
10.1 µA
Positive
-
0V
36V
1
500mA
0.45V @ 500mA
90dB ~ 20dB (120Hz ~ 1MHz)
Over Current, Over Temperature, Short Circuit
LT3085
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
36V
Adjustable
6-WFDFN Exposed Pad
6-DFN (2x3)
1 mA
RFQ
NCV4276ADSADJR4G
onsemi
IC REG LIN POS ADJ 400MA D2PAK-5
В наявності7460 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
AP7344D-3018RH4-7
Diodes Incorporated
IC REG LIN 1.8V/3V X2DFN1612-8
В наявності194320 pcs
140 µA
Positive
Enable
1.8V, 3V
-
2
300mA, 300mA
0.39V @ 300mA, 0.29V @ 300mA
75dB (1kHz)
Over Current
AP7344
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.25V
Fixed
8-XFDFN Exposed Pad
X2-DFN1612-8
-
RFQ
AP130-33YL-13
Diodes Incorporated
IC REG LINEAR 3.3V 300MA SOT89-3
В наявності13240 pcs
100 µA
Positive
-
3.3V
-
1
300mA
0.5V @ 300mA
58dB (100Hz)
Over Current, Over Temperature, Short Circuit
AP130
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Fixed
TO-243AA
SOT-89-3
-
RFQ
LM317D2TR4G
onsemi
IC REG LIN POS ADJ 1.5A D2PAK-3
В наявності50950 pcs
10 mA
Positive
-
1.2V
37V
1
1.5A
-
80dB ~ 65dB (120Hz)
Over Current, Over Temperature, Short Circuit
LM317
Tape & Reel (TR)
-
0°C ~ 125°C
Surface Mount
40V
Adjustable
TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
D2PAK-3
-
RFQ
ADP7183ACPZN0.5-R7
Analog Devices Inc.
IC REG LINEAR -0.5V 300MA 8LFCSP
В наявності12080 pcs
900 µA
Negative
Enable
-0.5V
-
1
300mA
0.22V @ 300mA
85dB ~ 40dB (1kHz ~ 1MHz)
Current Limit, Thermal Overload
ADP7183
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
-5.5V
Fixed
8-UFDFN Exposed Pad, CSP
8-LFCSP (2x2)
7 mA
RFQ
TPS7A2618DRVR
Texas Instruments
IC REG LINEAR 1.8V 500MA 6WSON
В наявності70950 pcs
4.5 µA
Positive
Enable, Power Good
1.8V
-
1
500mA
0.33V @ 500mA
75dB ~ 52dB (10Hz ~ 1kHz)
Over Current, Over Temperature, UVLO
TPS7A2618
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
18V
Fixed
6-WDFN Exposed Pad
6-WSON (2x2)
-
RFQ
NCP512SQ18T1
onsemi
IC REG LDO LQC 80MA 1.8V SC70-5
В наявності13260 pcs
-
-
-
-
-
-
-
-
-
-
NCP512
Cut Tape (CT)
*
-
Surface Mount
-
-
5-TSSOP, SC-70-5, SOT-353
SC-88A (SC-70-5/SOT-353)
-
RFQ
MP20056GG-33-Z
Monolithic Power Systems Inc.
IC REG LINEAR 3.3V 250MA 8QFN
В наявності96440 pcs
250 µA
Positive
Enable
3.3V
-
1
250mA
0.15V @ 250mA
65dB ~ 33dB (100Hz ~ 1MHz)
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
MP20056
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
8-TFDFN Exposed Pad
8-QFN (2x2)
330 µA
RFQ
AZ1084S2-2.5TRE1
Diodes Incorporated
IC REG LINEAR 2.5V 5A TO263-2
В наявності5100 pcs
10 mA
Positive
-
2.5V
-
1
5A
1.5V @ 5A
72dB (120Hz)
Over Current, Over Temperature
-
Tape & Reel (TR)
-
0°C ~ 125°C
Surface Mount
12V
Fixed
TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
TO-263
-
RFQ
LP2986IMM-5.0
Texas Instruments
IC REG LINEAR 5V 200MA 8VSSOP
В наявності7340 pcs
120 µA
Positive
Enable
5V
-
1
200mA
0.35V @ 200mA
65dB (1kHz)
Over Current, Over Temperature, Short Circuit
LP2986
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-VSSOP
3.7 mA
RFQ
ILC7082AIM5285X
Fairchild Semiconductor
IC REG LINEAR FIXED LDO REG
В наявності178980 pcs
220 µA
Positive
Enable
2.85V
-
1
150mA
0.3V @ 150mA
85dB ~ 60dB (1kHz ~ 1MHz)
Over Current, Over Temperature, Short Circuit
-
Bulk
-
-40°C ~ 85°C (TA)
Surface Mount
13V
Fixed
SC-74A, SOT-753
SOT-23-5
280 µA
RFQ
MIC5203-3.0BM5
Micrel Inc.
IC REG LINEAR LDO POS VOLT
В наявності192050 pcs
750 µA
Positive
Enable
3V
-
1
80mA
0.6V @ 80mA
-
Over Current, Over Temperature, Reverse Polarity
-
Bulk
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
3 mA
RFQ
LD1117AV18
STMicroelectronics
IC REG LINEAR 1.8V 1A TO220AB
В наявності17120 pcs
10 mA
Positive
-
1.8V
-
1
1A
1.3V @ 1A
80dB (120Hz)
Over Current, Over Temperature
LD1117
Tube
-
0°C ~ 125°C
Through Hole
15V
Fixed
TO-220-3
TO-220
-
RFQ
MAX883EPA+
Analog Devices Inc./Maxim Integrated
IC REG LIN POS ADJ 200MA 8DIP
В наявності7874 pcs
15 µA
Positive
Enable, Low Battery Detection
1.25V (5V)
11V
1
200mA
0.44V @ 200mA
-
Over Current, Over Temperature, Reverse Polarity
MAX883
Tube
-
-40°C ~ 85°C
Through Hole
11.5V
Adjustable (Fixed)
8-DIP (0.300", 7.62mm)
8-PDIP
25 µA
RFQ
L7812CV
UMW
1.2A FIXED 12V~12V POSITIVE 1 35
В наявності103550 pcs
6 mA
Positive
-
12V
-
1
1.2A
-
-
Over Temperature, Short Circuit
-
Cut Tape (CT)
L78xx
-40°C ~ 105°C
Through Hole
35V
Fixed
TO-220-3
TO-220
-
RFQ
S-1167B40-I6T2G
ABLIC Inc.
IC REG LINEAR 4V 150MA SNT6A
В наявності5050 pcs
900 nA
Positive
Enable
4V
-
1
150mA
0.21V @ 100mA
65dB (1kHz)
Over Current
-
Tape & Reel (TR)
S-1167
-40°C ~ 85°C (TA)
Surface Mount
6.5V
Fixed
6-SMD, Flat Leads
SNT-6A
16 µA
RFQ
TLS805B1LDV50XUMA1
Infineon Technologies
IC REG LINEAR 5V 50MA TSON-10
В наявності53180 pcs
8 µA
Positive
Enable
5V
-
1
50mA
0.35V @ 50mA
55dB (100Hz)
Over Current, Over Temperature
TLS805
Tape & Reel (TR)
Automotive, AEC-Q100, OPTIREG™
-40°C ~ 150°C (TJ)
Surface Mount
42V
Fixed
10-TFDFN Exposed Pad
PG-TSON-10
12 µA
RFQ
MC7815ABD2TG
onsemi
IC REG LINEAR 15V 1A D2PAK
В наявності7360 pcs
6 mA
Positive
-
15V
-
1
1A
2V @ 1A (Typ)
80dB (120Hz)
Over Temperature, Short Circuit
MC7815
Tube
-
-40°C ~ 125°C
Surface Mount
35V
Fixed
TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
D2PAK-3
-
RFQ
TPS71025DR
Texas Instruments
IC REG LINEAR 2.5V 500MA 8SOIC
В наявності18354 pcs
390 µA
Positive
Enable, Power Good
2.5V
-
1
500mA
0.4V @ 500mA
59dB ~ 54dB (120Hz)
Over Temperature
TPS71025
Tape & Reel (TR)
-
0°C ~ 125°C
Surface Mount
10V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SOIC
540 µA
RFQ
MCP1700-2502E/TO
Microchip Technology
IC REG LINEAR 2.5V 250MA TO92-3
В наявності95560 pcs
4 µA
Positive
-
2.5V
-
1
250mA
0.35V @ 250mA
44dB (100Hz)
Over Current, Over Temperature, Short Circuit
MCP1700
Bag
-
-40°C ~ 125°C
Through Hole
6V
Fixed
TO-226-3, TO-92-3 (TO-226AA)
TO-92-3
-
RFQ
RT9025-18GSP
Richtek USA Inc.
IC REG LIN POS ADJ 2A 8SOP
В наявності17480 pcs
1.2 mA
Positive
Enable, Power Good
0.8V (1.8V)
5.5V
1
2A
0.3V @ 2A
-
Over Current, Over Temperature
RT9025
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.5V
Adjustable (Fixed)
8-SOIC (0.154', 3.90mm Width) Exposed Pad
8-SOP-EP
-
RFQ
TLV70029DSER
Texas Instruments
IC REG LINEAR 2.9V 200MA 6WSON
В наявності216150 pcs
55 µA
Positive
Enable
2.9V
-
1
200mA
0.25V @ 200mA
68dB (1kHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TLV70029
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
6-WFDFN
6-WSON (1.5x1.5)
270 µA
RFQ
TLV73318PQDBVRQ1
Texas Instruments
IC REG LINEAR 1.8V 300MA SOT23-5
В наявності182070 pcs
78 µA
Positive
Enable
1.8V
-
1
300mA
0.3V @ 300mA
68dB ~ 28dB (100Hz ~ 100kHz)
Over Current, Over Temperature, UVLO
TLV733
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C (TA)
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
MIC5235-3.0BM5
Micrel Inc.
IC REG LINEAR 150MA MICROCAP LDO
В наявності160980 pcs
35 µA
Positive
Enable
3V
-
1
150mA
0.5V @ 150mA
-
Over Current, Over Temperature, Reverse Polarity
-
Bulk
-
-40°C ~ 125°C
Surface Mount
24V
Fixed
SC-74A, SOT-753
SOT-23-5
4 mA
RFQ
LT1965EQ#TRPBF
Analog Devices Inc.
IC REG LIN POS ADJ 1.1A 5DDPAK
В наявності6390 pcs
1.1 mA
Positive
Enable
1.2V
19.5V
1
1.1A
0.49V @ 1.1A
75dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT1965
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
20V
Adjustable
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
5-DDPAK
40 mA
RFQ
MIC5320-SGYMT-TR
Microchip Technology
IC REG LINEAR 1.8V/3.3V 6TMLF
В наявності43340 pcs
120 µA
Positive
Enable
1.8V, 3.3V
-
2
150mA, 150mA
0.1V @ 150mA, 0.1V @ 150mA
65dB ~ 45dB (1kHz ~ 20kHz)
Over Current, Over Temperature
MIC5320
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
6-UFDFN Exposed Pad
6-TMLF® (1.6x1.6)
190 µA
RFQ
MIC2951-03YM-TR
Microchip Technology
IC REG LIN POS ADJ 150MA 8SOIC
В наявності35518 pcs
300 µA
Positive
Enable
1.24V (5V)
29V
1
150mA
0.6V @ 150mA
-
Over Current, Over Temperature, Reverse Polarity
MIC2951
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
30V
Adjustable (Fixed)
8-SOIC (0.154', 3.90mm Width)
8-SOIC
8 mA
RFQ
LT3060MPTS8-3.3#TRPBF
Analog Devices Inc.
IC REG LIN 3.3V 100MA TSOT23-8
В наявності3696 pcs
80 µA
Positive
Enable, Soft Start
3.3V
-
1
100mA
0.51V @ 100mA
70dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT3060
Tape & Reel (TR)
-
-55°C ~ 150°C
Surface Mount
45V
Fixed
SOT-23-8 Thin, TSOT-23-8
TSOT-23-8
4 mA
RFQ
LF85CDT-TR
STMicroelectronics
IC REG LINEAR 8.5V 500MA DPAK
В наявності37920 pcs
1.5 mA
Positive
-
8.5V
-
1
500mA
0.7V @ 500mA
72dB ~ 57dB (120Hz ~ 10kHz)
Over Current, Over Temperature
LF85
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
DPAK
12 mA
RFQ
SP6214EC5-L-1-8
MaxLinear, Inc.
IC REG LINEAR 1.8V 100MA SC70-5
В наявності17450 pcs
125 µA
Positive
Enable
1.8V
-
1
100mA
-
70dB ~ 40dB (100Hz ~ 400kHz)
Over Current, Over Temperature
-
Bulk
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
5-TSSOP, SC-70-5, SOT-353
SC-70-5
250 µA
RFQ
MC7915CT
Fairchild Semiconductor
IC REG LINEAR -15V 1A TO220-3
В наявності186480 pcs
6 mA
Negative
-
-15V
-
1
1A
2V @ 1A
60dB (120Hz)
Over Temperature, Short Circuit
-
Tube
-
0°C ~ 125°C (TJ)
Through Hole
-35V
Fixed
TO-220-3
TO-220-3
-
RFQ
LM2931D-5.0R2G
onsemi
IC REG LINEAR 5V 100MA 8SOIC
В наявності100500 pcs
1 mA
Positive
-
5V
-
1
100mA
0.6V @ 100mA
90dB (120Hz)
Over Current, Over Temperature
LM2931
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
26V
Fixed
8-SOIC (0.154', 3.90mm Width)
8-SOIC
30 mA
RFQ
TPS70928DBVR
Texas Instruments
IC REG LINEAR 2.8V 150MA SOT23-5
В наявності75170 pcs
2.05 µA
Positive
Enable
2.8V
-
1
150mA
-
80dB ~ 52dB (10Hz ~ 1kHz)
Over Current, Over Temperature, Reverse Current, Under Voltage Lockout (UVLO)
TPS70928
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
30V
Fixed
SC-74A, SOT-753
SOT-23-5
350 µA
RFQ