TC1014-2.5VCT713
Microchip Technology
IC REG LINEAR 2.5V 50MA SOT23-5
В наличност111510 pcs
80 µA
Positive
Enable
2.5V
-
1
50mA
0.12V @ 50mA
64dB (1kHz)
Over Current, Over Temperature
TC1014
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
AP139-15WL-7
Diodes Incorporated
IC REG LINEAR 1.5V 300MA SOT25
В наличност80170 pcs
60 µA
Positive
Enable
1.5V
-
1
300mA
-
75dB ~ 30dB (1KHz ~ 100KHz)
Over Current, Over Temperature, Short Circuit
-
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-25
-
RFQ
MCP1826T-3302E/DC
Microchip Technology
IC REG LINEAR 3.3V 1A SOT223-5
В наличност45190 pcs
220 µA
Positive
Enable, Power Good
3.3V
-
1
1A
0.4V @ 1A
60dB (100Hz)
Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
MCP1826
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
SOT-223-6
SOT-223-5
-
RFQ
SPX29151T5-L-1-8/TR
MaxLinear, Inc.
IC REG LINEAR 1.8V 1.5A TO263-5
В наличност12360 pcs
-
Positive
Enable
1.8V
-
1
1.5A
-
-
Over Current, Reverse Polarity, Transient Voltage
-
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
TO-263-5
-
RFQ
TPS74301KTWR
Texas Instruments
IC REG LIN POS ADJ 1.5A DDPAK
В наличност9173 pcs
115 µA
Positive
Enable, Power Good, Tracking
0.8V
3.6V
1
1.5A
0.12V @ 1.5A
73dB ~ 42dB (1kHz ~ 800kHz)
Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
TPS74301
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Adjustable
TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
DDPAK/TO-263-7
1.5 mA
RFQ
MIC49500-0.9WR
Microchip Technology
IC REG LINEAR 0.9V 5A SPAK-7
В наличност3996 pcs
90 mA
Positive
Enable
0.9V
-
1
5A
0.5V @ 5A
-
Over Current, Over Temperature
MIC49500
Tube
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
SPak-7 (7 leads + Tab)
S-PAK-7
130 mA
RFQ
MIC29300-3.3BT
Microchip Technology
IC REG LINEAR 3.3V 3A TO220-3
В наличност7950 pcs
-
Positive
-
3.3V
-
1
3A
0.6V @ 3A
-
Over Current, Over Temperature, Reverse Polarity, Transient Voltage
MIC29300-3.3
Tube
-
-40°C ~ 125°C
Through Hole
26V
Fixed
TO-220-3
TO-220-3
-
RFQ
FAN1117AS33X
onsemi
IC REG LINEAR 3.3V 1A SOT223-4
В наличност6160 pcs
-
Positive
-
3.3V
-
1
1A
1.2V @ 1A
72dB (120Hz)
Over Current, Over Temperature
FAN1117
Tape & Reel (TR)
-
0°C ~ 125°C
Surface Mount
18V
Fixed
TO-261-4, TO-261AA
SOT-223-4
-
RFQ
LP5912-1.0DRVR
Texas Instruments
IC REG LINEAR 1V 500MA 6WSON
В наличност53040 pcs
55 µA
Positive
Enable, Power Good, Soft Start
1V
-
1
500mA
-
65dB ~ 40dB (100Hz ~ 100kHz)
Over Temperature, Reverse Polarity, Short Circuit
LP5912
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
6.5V
Fixed
6-WDFN Exposed Pad
6-WSON (2x2)
600 µA
RFQ
LDL1117S18R
STMicroelectronics
IC REG LINEAR 1.8V 1.2A SOT223
В наличност80070 pcs
500 µA
Positive
-
1.8V
-
1
1.2A
0.6V @ 1.2A
87dB ~ 65dB (120Hz ~ 100kHz)
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
LDL1117
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
18V
Fixed
TO-261-4, TO-261AA
SOT-223
-
RFQ
TPS70927DBVR
Texas Instruments
IC REG LINEAR 2.7V 150MA SOT23-5
В наличност64880 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
L4995RK
STMicroelectronics
IC REG LIN 5V 500MA POWERSSO-24
В наличност11850 pcs
160 µA
Positive
Reset
5V
-
1
500mA
0.5V @ 400mA
55dB (100Hz)
Over Temperature, Short Circuit
L4995
Tube
Automotive, AEC-Q100
-40°C ~ 150°C
Surface Mount
31V
Fixed
24-PowerBSOP (0.295', 7.50mm Width)
PowerSSO-24
2.7 mA
RFQ
MIC29302WT
Microchip Technology
IC REG LINEAR POS ADJ 3A TO220-5
В наличност21397 pcs
-
Positive
Enable
1.25V
25V
1
3A
0.6V @ 3A
-
Over Current, Over Temperature, Reverse Polarity, Transient Voltage
MIC29302
Tube
-
-40°C ~ 125°C
Through Hole
26V
Adjustable
TO-220-5
TO-220-5
-
RFQ
SPX3940T-L-3-3/TR
MaxLinear, Inc.
IC REG LINEAR 3.3V 1A TO263-3
В наличност26638 pcs
-
Positive
-
3.3V
-
1
1A
0.55V @ 1A
-
Over Current, Over Temperature, Reverse Polarity, Short Circuit, Transient Voltage
SPX3940
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
TO-263-3
-
RFQ
LM78M15CT
Texas Instruments
IC REG LINEAR 15V 500MA TO220-3
В наличност13680 pcs
3 mA
Positive
-
15V
-
1
500mA
-
69dB (120Hz)
Over Current, Over Temperature, Short Circuit
LM78M15
Tube
-
-40°C ~ 125°C
Through Hole
35V
Fixed
TO-220-3
TO-220-3
-
RFQ
TPS76301DBVRG4
Texas Instruments
IC REG LIN POS ADJ 150MA SOT23-5
В наличност9670 pcs
100 µA
Positive
Enable
1.5V
6.5V
1
150mA
-
60dB (1kHz)
Over Current, Over Temperature, Reverse Polarity
TPS76301
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
10V
Adjustable
SC-74A, SOT-753
SOT-23-5
140 µA
RFQ
AP2210N-4.0TRG1
Diodes Incorporated
IC REG LINEAR 4V 300MA SOT23-3
В наличност304990 pcs
180 µA
Positive
-
4V
-
1
300mA
0.5V @ 300mA
75dB (100Hz)
Over Current, Over Temperature, Reverse Polarity
AP2210
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
13.2V
Fixed
TO-236-3, SC-59, SOT-23-3
SOT-23-3
15 mA
RFQ
RT9080N-08GJ5
Richtek USA Inc.
IC REG LIN 0.8V 600MA TSOT23-5
В наличност264150 pcs
4 µA
Positive
Enable
0.8V
-
1
600mA
1.33V @ 600mA
75dB (1kHz)
Over Current, Over Temperature
RT9080
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
-
RFQ
MAX5087BATE+
Analog Devices Inc./Maxim Integrated
IC REG LIN POS ADJ 400MA 16TQFN
В наличност13340 pcs
150 µA
Positive
Enable, Reset
2.5V (5V)
11V
1
400mA
2.2V @ 400mA
70dB (100Hz)
Over Current, Over Temperature, Short Circuit
MAX5087
Tube
-
-40°C ~ 125°C
Surface Mount
45V
Adjustable (Fixed)
16-WQFN Exposed Pad
16-TQFN (5x5)
-
RFQ
TPS73615DBVT
Texas Instruments
IC REG LINEAR 1.5V 400MA SOT23-5
В наличност20289 pcs
550 µA
Positive
Enable
1.5V
-
1
400mA
0.2V @ 400mA
58dB ~ 37dB (100Hz ~ 10kHz)
Over Current, Over Temperature, Reverse Polarity
TPS73615
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
1 mA
RFQ
LD39080PT18-R
STMicroelectronics
IC REG LINEAR 1.8V 800MA PPAK
В наличност49930 pcs
2.5 mA
Positive
Enable
1.8V
-
1
800mA
0.3V @ 800mA
-
Over Current, Over Temperature, Short Circuit
LD39080
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
TO-252-5, DPak (4 Leads + Tab), TO-252AD
PPAK
-
RFQ
LP3995ILD-1.5
Texas Instruments
IC REG LINEAR 1.5V 150MA 6WSON
В наличност7060 pcs
150 µA
Positive
Enable
1.5V
-
1
150mA
0.1V @ 150mA
60dB ~ 50dB (1kHz ~ 10kHz)
Over Temperature, Short Circuit
LP3995
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
6-WDFN Exposed Pad
6-WSON (2.92x3.29)
200 µA
RFQ
LP2980IM5-3.3
Texas Instruments
IC REG LINEAR 3.3V 50MA SOT23-5
В наличност43640 pcs
95 µA
Positive
Enable
3.3V
-
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
ISL78301FVECZ-T
Renesas Electronics America Inc
IC REG LIN POS ADJ 14HTSSOP
В наличност26558 pcs
24 µA
Positive
Enable
2.5V
12V
1
150mA
-
66dB (100Hz)
Over Current, Over Temperature
ISL78301
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
40V
Adjustable
14-TSSOP (0.173", 4.40mm Width) Exposed Pad
14-HTSSOP
125 µA
RFQ
L7915CV-DG
STMicroelectronics
IC REG LINEAR -15V 1.5A TO220
В наличност154490 pcs
3 mA
Negative
-
-15V
-
1
1.5A
1.1V @ 1A (Typ)
60dB (120Hz)
Over Temperature, Short Circuit
L7915
Tube
-
0°C ~ 125°C
Through Hole
-35V
Fixed
TO-220-3
TO-220
-
RFQ
LT1963AEST-1.5#TRPBF
Analog Devices Inc.
IC REG LINEAR 1.5V 1.5A SOT223-3
В наличност11752 pcs
1.5 mA
Positive
Enable
1.5V
-
1
1.5A
0.55V @ 1.5A
63dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT1963
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
20V
Fixed
TO-261-4, TO-261AA
SOT-223-3
120 mA
RFQ
NCV4269ADW50R2G
onsemi
IC REG LINEAR 5V 150MA 20SOIC
В наличност9930 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
20-SOIC (0.295', 7.50mm Width)
20-SOIC
3 mA
RFQ
SP6214EC5-L-3-0
MaxLinear, Inc.
IC REG LINEAR 3V 100MA SC70-5
В наличност4990 pcs
125 µA
Positive
Enable
3V
-
1
100mA
0.5V @ 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
LM2941CSX
Texas Instruments
IC REG LIN POS ADJ 1A DDPAK
В наличност14530 pcs
10 mA
Positive
Enable
5V
20V
1
1A
1V @ 1A
-
Over Temperature, Reverse Polarity, Short Circuit
LM2941
Bulk
-
0°C ~ 125°C
Surface Mount
26V
Adjustable
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
DDPAK/TO-263-5
15 mA
RFQ
LT1761ES5-SD#TRPBF
Analog Devices Inc.
IC REG LIN POS ADJ 100MA TSOT23
В наличност17116 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
ADM7155ACPZ-01-R7
Analog Devices Inc.
IC REG LIN POS ADJ 600MA 8LFCSP
В наличност8093 pcs
7 mA
Positive
Enable
1.2V
1.8V
1
600mA
0.21V @ 600mA
92dB ~ 65dB (1kHz ~ 1MHz)
Over Current, Over Temperature
ADM7155
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Adjustable
8-WFDFN Exposed Pad, CSP
8-LFCSP-WD (3x3)
10 mA
RFQ
TPS77050DBVR
Texas Instruments
IC REG LINEAR 5V 50MA SOT23-5
В наличност68770 pcs
28 µA
Positive
Enable
5V
-
1
50mA
0.09V @ 50mA
60dB (1kHz)
Over Current, Over Temperature, Reverse Polarity
TPS77050
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
10V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
LM1117MPX-ADJNOPB
onsemi
IC REG LIN POS ADJ 800MA SOT223
В наличност141090 pcs
-
Positive
-
1.25V
13.8V
1
800mA
1.2V @ 800mA
73dB (120Hz)
Over Current, Over Temperature
LM1117
Tape & Reel (TR)
-
0°C ~ 125°C (TA)
Surface Mount
20V
Adjustable
TO-261-4, TO-261AA
SOT-223
-
RFQ
TPS73233DCQRG4
Texas Instruments
IC REG LIN 3.3V 250MA SOT223-6
В наличност13320 pcs
550 µA
Positive
Enable
3.3V
-
1
250mA
0.15V @ 250mA
58dB ~ 37dB (100Hz ~ 10kHz)
Over Current, Over Temperature, Short Circuit, Reverse Polarity
TPS732
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
SOT-223-6
SOT-223-6
950 µA
RFQ
TLV70536YFMR
Texas Instruments
IC REG LINEAR 3.6V 200MA 4-DSLGA
В наличност70160 pcs
55 µA
Positive
Enable
3.6V
-
1
200mA
0.25V @ 200mA
80dB ~ 55dB (10kHz ~ 1MHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TLV705
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
4-XFLGA, DSLGA
4-DSLGA
315 µA
RFQ
LD2980CM18TR
STMicroelectronics
IC REG LINEAR 1.8V 50MA SOT23-5
В наличност109550 pcs
150 µA
Positive
Enable
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
SC-74A, SOT-753
SOT-23-5
1.2 mA
RFQ
LT1963AES8-3.3#TRPBF
Analog Devices Inc.
IC REG LINEAR 3.3V 1.5A 8SOIC
В наличност10835 pcs
1.5 mA
Positive
Enable
3.3V
-
1
1.5A
0.55V @ 1.5A
63dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT1963
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
20V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SO
120 mA
RFQ
TPS7348QP
Texas Instruments
IC REG LINEAR 4.85V 500MA 8DIP
В наличност10830 pcs
-
Positive
Enable, Reset
4.85V
-
1
500mA
0.15V @ 500mA (Typ)
53dB ~ 50dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
TPS734
Tube
-
-40°C ~ 125°C
Through Hole
10V
Fixed
8-DIP (0.300', 7.62mm)
8-PDIP
550 µA
RFQ
NCP160BFCT450T2G
onsemi
IC REG LINEAR 4.5V 250MA 4WLCSP
В наличност416200 pcs
23 µA
Positive
Enable
4.5V
-
1
250mA
0.12V @ 250mA
91dB ~ 48dB (100Hz ~ 100kHz)
Over Current, Over Temperature, Soft Start
NCP160
Tape & Reel (TR)
-
-40°C ~ 125°C (TA)
Surface Mount
5.5V
Fixed
4-XFBGA, WLCSP
4-WLCSP (0.64x0.64)
-
RFQ
R1121N301B-TR-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 3V 150MA SOT23-5
В наличност136260 pcs
70 µA
Positive
Enable
3V
-
1
150mA
0.3V @ 100mA
-
Over Current
R1121
Tape & Reel (TR)
R1121N
-40°C ~ 85°C
Surface Mount
8V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
UCC383TDKTTT-ADJ
Texas Instruments
IC REG LIN POS ADJ 3A DDPAK
В наличност16140 pcs
650 µA
Positive
-
1.22V
8.5V
1
3A
6V @ 3A
-
Over Temperature, Reverse Polarity, Short Circuit, Under Voltage Lockout (UVLO)
UCC383
Tape & Reel (TR)
-
0°C ~ 70°C
Surface Mount
9V
Adjustable
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
DDPAK/TO-263-5
-
RFQ
FT531GA
Fremont Micro Devices Ltd
IC REG LINEAR 2.8V 250MA SOT23-5
В наличност17430 pcs
36 µA
Positive
Enable
2.8V
-
1
250mA
0.12V @ 100mA
72dB ~ 60dB (1kHz ~ 10kHz )
Over Current
-
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
TLV73330PQDBVRQ1
Texas Instruments
IC REG LINEAR 3V 300MA SOT23-5
В наличност176950 pcs
78 µA
Positive
Enable
3V
-
1
300mA
0.29V @ 300mA
-
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
LT1086CT#PBF
Analog Devices Inc.
IC REG LIN POS ADJ 1.5A TO220-3
В наличност11321 pcs
-
Positive
-
1.25V
23.5V
1
1.5A
1.5V @ 1.5A
75dB (120Hz)
Over Current, Over Temperature
LT1086
Tube
-
0°C ~ 125°C
Through Hole
25V
Adjustable
TO-220-3
TO-220-3
-
RFQ
SC1541CM-3.3TRT
Semtech Corporation
IC REG LINEAR 3.3V 1A TO263-5
В наличност15790 pcs
10 µA
Positive
Enable
3.3V
-
1
1A
1.3V @ 1A
72dB (120Hz)
Over Current, Over Temperature
SC1541
Tape & Reel (TR)
-
0°C ~ 125°C
Surface Mount
7V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
TO-263-5
10 mA
RFQ
LDK120C33R
STMicroelectronics
IC REG LIN 3.3V 200MA SOT323-5
В наличност126570 pcs
60 µA
Positive
Enable
3.3V
-
1
200mA
0.3V @ 200mA
55dB (120Hz ~ 10kHz)
Over Current, Over Temperature
LDK120
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
5-TSSOP, SC-70-5, SOT-353
SOT-323-5
100 µA
RFQ
MAX8887EZK33+T
Analog Devices Inc./Maxim Integrated
IC REG LIN 3.3V 300MA TSOT23-5
В наличност23867 pcs
100 µA
Positive
Enable
3.3V
-
1
300mA
0.15V @ 300mA (Typ)
60dB (1kHz)
Over Current, Over Temperature, Short Circuit
MAX8887
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
65 µA
RFQ
FAN1950D25X
onsemi
IC REG LINEAR 2.5V 1.5A DPAK
В наличност6800 pcs
-
Positive
-
2.5V
-
1
1.5A
0.5V @ 1.5A
-
Over Current, Over Temperature
FAN1950
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
14V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252AA
-
RFQ
LT3071MPUFD#PBF
Linear Technology
LT3071 - 5A, LOW NOISE, PROGRAMM
В наличност1781 pcs
1.8 mA
Positive
Enable, Power Good, Soft Start
0.8V
1.8V
1
5A
0.15V @ 5A
66dB (120Hz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
-
Bulk
-
-55°C ~ 125°C (TJ)
Surface Mount
3V
Programmable
28-WFQFN Exposed Pad
28-QFN (4x5)
10 mA
RFQ
TLV1117-50IDCY
Texas Instruments
IC REG LINEAR 5V 800MA SOT223-4
В наличност82990 pcs
-
Positive
-
5V
-
1
800mA
1.3V @ 800mA
75dB (120Hz)
Over Current, Over Temperature
TLV1117
Tube
-
-40°C ~ 125°C
Surface Mount
15V
Fixed
TO-261-4, TO-261AA
SOT-223-4
-
RFQ