TLV70218DBVR
Texas Instruments
IC REG LINEAR 1.8V 300MA SOT23-5
Á lager209090 pcs
55 µA
Positive
Enable
1.8V
-
1
300mA
0.38V @ 300mA
68dB (1kHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TLV70218
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
370 µA
RFQ
LP2985IM5X-3.3
Texas Instruments
IC REG LINEAR 3.3V 150MA SOT23-5
Á lager3600 pcs
95 µA
Positive
Enable
3.3V
-
1
150mA
0.58V @ 150mA
45dB (1kHz)
Over Current, Over Temperature, Short Circuit
LP2985
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
2.5 mA
RFQ
TPS75301QPWPR
Texas Instruments
IC REG LIN POS ADJ 1.5A 20HTSSOP
Á lager14800 pcs
125 µA
Positive
Enable, Power Good, Reset Output
1.5V
5V
1
1.5A
0.30V @ 1.5A
63dB (100Hz)
Over Current, Over Temperature, Reverse Polarity
TPS75301
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Adjustable
20-PowerTSSOP (0.173", 4.40mm Width)
20-HTSSOP
-
RFQ
XC6221B152MR-G
Torex Semiconductor Ltd
IC REG LINEAR 1.5V 200MA SOT25
Á lager168030 pcs
50 µA
Positive
Enable
1.5V
-
1
200mA
0.65V @ 100mA
70dB (1kHz)
Over Current, Short Circuit
XC6221
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-25-5
-
RFQ
LT3029EMSE#PBF
Analog Devices Inc.
IC REG LINEAR POS ADJ 16MSOP
Á lager5811 pcs
-
Positive
Enable
1.215V
19.5V
2
500mA, 500mA
0.46V @ 500mA, 0.46V @ 500mA
67dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT3029
Tube
-
-40°C ~ 125°C
Surface Mount
20V
Adjustable
16-TFSOP (0.118", 3.00mm Width) Exposed Pad
16-MSOP-EP
-
RFQ
NJM7918FA
Nisshinbo Micro Devices Inc.
IC REG LINEAR -18V 1.5A TO220F
Á lager13880 pcs
6 mA
Negative
-
-18V
-
1
1.5A
-
66dB (120Hz)
Over Temperature, Short Circuit
-
Bulk
-
-40°C ~ 85°C
Through Hole
-40V
Fixed
TO-220-3 Full Pack
TO-220F
-
RFQ
TPS71533QDCKRQ1
Texas Instruments
IC REG LINEAR 3.3V 50MA SC70-5
Á lager67780 pcs
12 µA
Positive
-
3.3V
-
1
50mA
0.75V @ 50mA
60dB (100kHz)
Over Current, Reverse Polarity
TPS71533
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
24V
Fixed
5-TSSOP, SC-70-5, SOT-353
SC-70-5
-
RFQ
S-812C50BMC-C5ET2U
ABLIC Inc.
IC REG LINEAR 5V 75MA SOT23-5
Á lager70930 pcs
500 nA
Positive
Enable
5V
-
1
75mA
0.25V @ 10mA
-
Short Circuit
S-812
Tape & Reel (TR)
S-812C
-40°C ~ 85°C (TA)
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
2.1 µA
RFQ
LM337BD2TR4G
onsemi
IC REG LIN NEG ADJ 1.5A D2PAK-3
Á lager44079 pcs
6 mA
Negative
-
-1.2V
-37V
1
1.5A
-
77dB (120Hz)
Over Current, Over Temperature
LM337
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
-40V
Adjustable
TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
D2PAK-3
10 mA
RFQ
LP2985IM5-1.8
Texas Instruments
IC REG LINEAR 1.8V 150MA SOT23-5
Á lager82940 pcs
95 µA
Positive
Enable
1.8V
-
1
150mA
0.58V @ 150mA
45dB (1kHz)
Over Current, Over Temperature, Short Circuit
LP2985
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
2.5 mA
RFQ
TLV70133DBVR
Texas Instruments
IC REG LINEAR 3.3V 150MA SOT23-5
Á lager86560 pcs
4.5 µA
Positive
-
3.3V
-
1
150mA
0.4V @ 50mA
60dB (100kHz)
Over Current, Reverse Polarity
TLV70133
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
24V
Fixed
SC-74A, SOT-753
SOT-23-5
5.5 µA
RFQ
ADP3334ARZ-REEL7
Analog Devices Inc.
IC REG LIN POS ADJ 500MA 8SOIC
Á lager16709 pcs
130 µA
Positive
Feedback, Shutdown
1.5V
10V
1
500mA
0.4V @ 500mA
-
Over Current, Over Temperature
ADP3334
Tape & Reel (TR)
anyCAP®
-40°C ~ 85°C (TA)
Surface Mount
11V
Adjustable
8-SOIC (0.154", 3.90mm Width)
8-SOIC
10 mA
RFQ
MC78L12ACD
onsemi
IC REG LINEAR 12V 100MA 8SOIC
Á lager12670 pcs
6.5 mA
Positive
-
12V
-
1
100mA
-
42dB (120Hz)
Over Temperature, Short Circuit
MC78L12
Tube
-
0°C ~ 125°C
Surface Mount
35V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SOIC
-
RFQ
AP7361-33ER-13
Diodes Incorporated
IC REG LINEAR 3.3V 1A SOT223R
Á lager288980 pcs
90 µA
Positive
-
3.3V
-
1
1A
0.7V @ 1A
65dB ~ 45dB (1kHz ~ 10kHz)
Over Current, Over Temperature, Short Circuit
AP7361
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
6V
Fixed
TO-261-4, TO-261AA
SOT-223R
-
RFQ
NCP1086D2TADJR4G
onsemi
IC REG LIN POS ADJ 1.5A D2PAK-3
Á lager4770 pcs
-
Positive
-
1.25V
5.5V
1
1.5A
1.4V @ 1.5A
80dB (120Hz)
Over Current, Over Temperature
NCP1086
Tape & Reel (TR)
-
0°C ~ 70°C
Surface Mount
7V
Adjustable
TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
D2PAK-3
-
RFQ
LT1129IT-5#PBF
Analog Devices Inc.
IC REG LINEAR 5V 700MA TO220-5
Á lager8951 pcs
70 µA
Positive
Enable
5V
-
1
700mA
0.7V @ 700mA
64dB (120Hz)
Over Temperature, Reverse Polarity
LT1129
Tube
-
-40°C ~ 125°C
Through Hole
30V
Fixed
TO-220-5
TO-220-5
90 mA
RFQ
XC6221B1527R-G
Torex Semiconductor Ltd
IC REG LINEAR 1.5V 200MA 4USPN
Á lager162830 pcs
50 µA
Positive
Enable
1.5V
-
1
200mA
0.65V @ 100mA
70dB (1kHz)
Over Current, Short Circuit
XC6221
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Fixed
4-XDFN
4-USPN (0.90x1.2)
-
RFQ
LT1761IS5-2.8#TRPBF
Analog Devices Inc.
IC REG LIN 2.8V 100MA TSOT23-5
Á lager17183 pcs
-
Positive
Enable
2.8V
-
1
100mA
0.45V @ 100mA
65dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT1761
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
20V
Fixed
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
-
RFQ
NCP4682DSN30T1G
onsemi
IC REG LINEAR 3V 150MA SOT23-5
Á lager6620 pcs
1.5 µA
Positive
Enable
3V
-
1
150mA
0.32V @ 150mA
30dB (1kHz)
Over Current
NCP4682
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.25V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
XC6504A121MR-G
Torex Semiconductor Ltd
IC REG LINEAR 1.2V 150MA SOT25-5
Á lager247310 pcs
1.27 µA
Positive
Enable
1.2V
-
1
150mA
1.93V @ 150mA
-
Over Current
XC6504
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-25-5
1.8 µA
RFQ
MIC5216-5.0YM5
Micrel Inc.
IC REG LINEAR 500MA LDO REG
Á lager5130 pcs
3 µA
Positive
Enable
5V
-
1
500mA
0.6V @ 500mA
75dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
MIC5216
Bulk
-
-40°C ~ 125°C
Surface Mount
12V
Fixed
SC-74A, SOT-753
SOT-23-5
25 mA
RFQ
ADP7118ACPZN3.3-R7
Analog Devices Inc.
IC REG LINEAR 3.3V 200MA 6LFCSP
Á lager23102 pcs
140 µA
Positive
Enable, Soft Start
3.3V
-
1
200mA
0.42V @ 200mA
88dB ~ 50dB (10kHz ~ 1MHz)
Over Current, Over Temperature
ADP7118
Tape & Reel (TR)
-
-40°C ~ 125°C (TA)
Surface Mount
20V
Fixed
6-UDFN Exposed Pad, CSP
6-LFCSP-UD (2x2)
320 µA
RFQ
NCP502SQ33T2G
onsemi
IC REG LINEAR 3.3V 80MA SC88A
Á lager90750 pcs
40 µA
Positive
Enable
3.3V
-
1
80mA
1.2V @ 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
LP2985A-28DBVR
Texas Instruments
IC REG LINEAR 2.8V 150MA SOT23-5
Á lager157440 pcs
95 µA
Positive
Enable
2.8V
-
1
150mA
0.58V @ 150mA
45dB (1kHz)
Over Current, Over Temperature, Short Circuit
LP2985
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
2.5 mA
RFQ
FAN1616AS5X
Fairchild Semiconductor
IC REG LINEAR 5V 500MA SOT223-4
Á lager116220 pcs
-
Positive
-
5V
-
1
500mA
1.2V @ 500mA
72dB (120Hz)
Over Current, Over Temperature
-
Bulk
-
-40°C ~ 125°C
Surface Mount
18V
Fixed
TO-261-4, TO-261AA
SOT-223-4
-
RFQ
TPS73633DBVTG4
Texas Instruments
IC REG LINEAR 3.3V 400MA SOT23-5
Á lager17845 pcs
550 µA
Positive
Enable
3.3V
-
1
400mA
0.2V @ 400mA
58dB ~ 37dB (100Hz ~ 10kHz)
Over Current, Over Temperature, Reverse Polarity
TPS73633
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
1 mA
RFQ
ADP1706ACPZ-2.5-R7
Analog Devices Inc.
IC REG LINEAR 2.5V 1A 8LFCSP
Á lager20160 pcs
390 µA
Positive
Enable, Soft Start
2.5V
-
1
1A
0.63V @ 1A
-
Over Current, Over Temperature
ADP1706
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
8-WFDFN Exposed Pad, CSP
8-LFCSP (3x3)
1.55 mA
RFQ
TC1223-2.5VCTTR
Microchip Technology
IC REG LINEAR 2.5V 50MA SOT23-5
Á lager130910 pcs
80 µA
Positive
Enable
2.5V
-
1
50mA
0.12V @ 50mA
64dB (1kHz)
Over Current, Over Temperature
TC1223
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
FAN2504S25X
onsemi
IC REG LINEAR 2.5V 200MA SOT23-5
Á lager5290 pcs
75 µA
Positive
Enable
2.5V
-
1
200mA
0.2V @ 200mA
43dB (120Hz)
Over Temperature
FAN2504
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6.5V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
LP3873ES-2.5
Texas Instruments
IC REG LIN 2.5V 3A DDPAK/TO263-5
Á lager7108 pcs
9 mA
Positive
Enable
2.5V
-
1
3A
1.2V @ 3A
73dB ~ 57dB (120Hz)
Over Current, Over Temperature, Short Circuit
LP3873
Tube
-
-40°C ~ 125°C
Surface Mount
7V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
DDPAK/TO-263-5
15 mA
RFQ
TPS78342DDCT
Texas Instruments
IC REG LINEAR 4.2V 150MA SOT23-5
Á lager43000 pcs
800 nA
Positive
Enable
4.2V
-
1
150mA
0.25V @ 150mA
40dB ~ 15dB (10Hz ~ 1kHz)
Over Current, Over Temperature, Reverse Polarity
TPS783
Tape & Reel (TR)
-
-40°C ~ 105°C
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
SOT-23-THIN
8 µA
RFQ
LDK130C33R
STMicroelectronics
IC REG LIN 3.3V 300MA SOT323-5
Á lager94820 pcs
60 µA
Positive
Enable
3.3V
-
1
300mA
0.4V @ 300mA
55dB (120Hz ~ 10kHz)
Over Current, Over Temperature
LDK130
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
5-TSSOP, SC-70-5, SOT-353
SOT-323-5
120 µA
RFQ
TPS78418BQWDRBRQ1
Texas Instruments
AUTOMOTIVE, 300-MA, LOW-IQ, HIGH
Á lager75030 pcs
40 µA
Positive
Current Limit, Enable
1.8V
-
1
300mA
0.32V @ 300mA
60dB ~ 30dB (1kHz ~ 1MHz)
Over Current, Over Temperature, UVLO
-
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 150°C (TJ)
Surface Mount, Wettable Flank
6V
Fixed
8-VDFN Exposed Pad
8-SON (3x3)
-
RFQ
MAX1806EUA15+T
Analog Devices Inc./Maxim Integrated
IC REG LIN POS ADJ 500MA 8UMAX
Á lager19886 pcs
400 µA
Positive
Enable, Power Good
0.8V (1.5V)
4.5V
1
500mA
-
-
Over Current, Over Temperature, Short Circuit
MAX1806
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Adjustable (Fixed)
8-TSSOP, 8-MSOP (0.118', 3.00mm Width) Exposed Pad
8-uMAX-EP|8-uSOP-EP
-
RFQ
LT3055IDE#PBF
Analog Devices Inc.
IC REG LIN POS ADJ 500MA 16DFN
Á lager7992 pcs
130 µA
Positive
Current Limit, Enable, Power Good, Soft Start
0.6V
40V
1
500mA
0.59V @ 500mA
85dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT3055
Tube
-
-40°C ~ 125°C
Surface Mount
45V
Adjustable
16-WFDFN Exposed Pad
16-DFN (4x3)
25 mA
RFQ
NCP4680DMX15TCG
onsemi
IC REG LINEAR 1.5V 150MA 4XDFN
Á lager4820 pcs
70 µA
Positive
Enable
1.5V
-
1
150mA
0.54V @ 150mA
75dB (1kHz)
Over Current
NCP4680
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.25V
Fixed
4-XFDFN Exposed Pad
4-XDFN (0.8x0.8)
-
RFQ
ADP1706ARDZ-1.8-R7
Analog Devices Inc.
IC REG LINEAR 1.8V 1A 8SOIC
Á lager18411 pcs
390 µA
Positive
Enable, Soft Start
1.8V
-
1
1A
0.6V @ 1A
-
Over Current, Over Temperature
ADP1706
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
8-SOIC (0.154', 3.90mm Width) Exposed Pad
8-SOIC-EP
1.55 mA
RFQ
TLV70015DSET
Texas Instruments
IC REG LINEAR 1.5V 200MA 6WSON
Á lager64200 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
MCP1702T-3302E/CB
Microchip Technology
IC REG LIN 3.3V 250MA SOT23A-3
Á lager75820 pcs
5 µA
Positive
-
3.3V
-
1
250mA
0.725V @ 250mA
44dB (100Hz)
Over Current, Over Temperature, Short Circuit
MCP1702
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
13.2V
Fixed
TO-236-3, SC-59, SOT-23-3
SOT-23A-3
-
RFQ
SPX3819M5-L-1-2/TR
MaxLinear, Inc.
IC REG LINEAR 1.2V 500MA SOT23-5
Á lager186280 pcs
8 µA
Positive
Enable
1.2V
-
1
500mA
-
-
Over Current, Over Temperature, Reverse Polarity
SPX3819
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
30 mA
RFQ
LP2980IM5X-4.7
Texas Instruments
IC REG LINEAR 4.7V 50MA SOT23-5
Á lager9090 pcs
95 µA
Positive
Enable
4.7V
-
1
50mA
0.22V @ 50mA
63dB (1kHz)
Over Current, Over Temperature, Short Circuit
LP2980
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
1.2 mA
RFQ
UA78M05IKVURG3
Texas Instruments
IC REG LINEAR 5V 500MA TO252-3
Á lager158700 pcs
-
Positive
-
5V
-
1
500mA
2V @ 350mA
80dB (120Hz)
Over Current, Over Temperature, Short Circuit
UA78M05
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
25V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252-3
-
RFQ
LT3032EDE-5#PBF
Analog Devices Inc.
IC REG LIN +/-5V 150MA/150MA 14D
Á lager7992 pcs
-
Positive and Negative
Enable
±5V
-
2
150mA, 150mA
0.27V @ 150mA (Typ), 0.3V @ 150mA (Typ)
68dB (120Hz), 54dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT3032
Tube
-
-40°C ~ 125°C
Surface Mount
±20V
Fixed
14-PowerWFDFN
14-DFN (4x3)
-
RFQ
AP7361C-33E-13
Diodes Incorporated
IC REG LINEAR 3.3V 1A SOT223
Á lager205310 pcs
80 µA
Positive
-
3.3V
-
1
1A
0.36V @ 1A (Typ)
75dB ~ 55dB (1kHz ~ 10kHz)
Over Current, Over Temperature
AP7361
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Fixed
TO-261-4, TO-261AA
SOT-223-3
-
RFQ
MAX15006BASA/V+T
Analog Devices Inc./Maxim Integrated
IC REG LINEAR 5V 50MA 8SOIC
Á lager42715 pcs
17 µA
Positive
-
5V
-
1
50mA
0.525V @ 50mA
66dB (100Hz)
Over Temperature, Short Circuit
MAX15006
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C (TA)
Surface Mount
40V
Fixed
8-SOIC (0.154", 3.90mm Width) Exposed Pad
8-SOIC-EP
150 µA
RFQ
BA07CC0FP-E2
Rohm Semiconductor
IC REG LINEAR 7V 1A TO252-3
Á lager45400 pcs
2.5 mA
Positive
-
7V
-
1
1A
-
55dB (120Hz)
Over Current, Over Temperature, Over Voltage
BA07CC0
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
25V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252
5 mA
RFQ
BD10KA5FP-E2
Rohm Semiconductor
IC REG LINEAR 1V 500MA TO252-3
Á lager50240 pcs
0.35 mA
Positive
-
1V
-
1
500mA
-
50dB (120Hz)
Over Current, Over Temperature
BD10KA5
Tape & Reel (TR)
-
-40°C ~ 105°C
Surface Mount
5.5V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252
550 µA
RFQ
MC33275ST-5.0T3
onsemi
IC REG LINEAR 5V 300MA SOT223
Á lager14450 pcs
200 µA
Positive
-
5V
-
1
300mA
0.5V @ 300mA
75dB (120Hz)
Over Current, Over Temperature
MC33275
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
13V
Fixed
TO-261-4, TO-261AA
SOT-223 (TO-261)
-
RFQ
L78S15CV-DG
STMicroelectronics
IC REG LINEAR 15V 2A TO220
Á lager17850 pcs
8 mA
Positive
-
15V
-
1
2A
-
46dB (120Hz)
Over Current, Over Temperature, Short Circuit
L78S15
Tube
-
0°C ~ 150°C
Through Hole
35V
Fixed
TO-220-3
TO-220
-
RFQ
LT3012HFE#TRPBF
Analog Devices Inc.
IC REG LIN POS ADJ 200MA 16TSSOP
Á lager8454 pcs
110 µA
Positive
Enable
1.24V
60V
1
200mA
0.63V @ 200mA
75dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT3012
Tape & Reel (TR)
-
-40°C ~ 140°C
Surface Mount
80V
Adjustable
16-TSSOP (0.173", 4.40mm Width) Exposed Pad
16-TSSOP-EP
18 mA
RFQ