TC2054-1.8VCTTR
Microchip Technology
IC REG LINEAR 1.8V 50MA SOT23-5
Nan stok95700 pcs
80 µA
Positive
Enable
1.8V
-
1
50mA
0.07V @ 50mA
50dB (100kHz)
Over Current, Over Temperature
TC2054
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
MAX8887EZK18+TG05
Analog Devices Inc./Maxim Integrated
IC REG LIN 1.8V 300MA TSOT23-5
Nan stok8640 pcs
100 µA
Positive
Enable
1.8V
-
1
300mA
-
60dB (1kHz)
Over Current, Over Temperature, Short Circuit
MAX888
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
R1100D291C-TR-F
Nisshinbo Micro Devices Inc.
IC REG LIN 2.9V 100MA SON1408-3
Nan stok160700 pcs
3 µA
Positive
Enable
2.9V
-
1
100mA
0.05V @ 1mA
-
Over Current
R1100
Tape & Reel (TR)
R1100D
-40°C ~ 85°C
Surface Mount
6V
Fixed
SOT-623F
SON1408-3
-
RFQ
S-818A50AMC-BHET2G
ABLIC Inc.
IC REG LINEAR 5V 300MA SOT23-5
Nan stok83340 pcs
500 nA
Positive
Enable
5V
-
1
300mA
0.21V @ 60mA
45dB (100Hz)
-
S-818
Tape & Reel (TR)
S-818
-40°C ~ 85°C (TA)
Surface Mount
10V
Fixed
SC-74A, SOT-753
SOT-23-5
40 µA
RFQ
EZ1083CT-3.3
Semtech Corporation
IC REG LINEAR 3.3V 7.5A TO220-3
Nan stok12900 pcs
14 mA
Positive
-
3.3V
-
1
7.5A
1.4V @ 7.5A
72dB (120Hz)
Over Current, Over Temperature
-
Bulk
-
0°C ~ 125°C (TJ)
Through Hole
7V
Fixed
TO-220-3
TO-220
14 mA
RFQ
REG103GA-2.5
Texas Instruments
IC REG LIN 2.5V 500MA SOT223-6
Nan stok10681 pcs
0.7 mA
Positive
Enable
2.5V
-
1
500mA
0.28V @ 500mA
65dB (120Hz)
Over Current, Over Temperature
REG103
Tube
-
-40°C ~ 85°C
Surface Mount
15V
Fixed
SOT-223-6
SOT-223-6
1.3 mA
RFQ
AS1369-BWLT-18
ams OSRAM
IC REG LINEAR 1.8V 200MA 4WLCSP
Nan stok8410 pcs
50 µA
Positive
Enable
1.8V
-
1
200mA
0.2V @ 200mA
-
Over Current, Over Temperature
-
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
4-UFBGA, WLCSP
4-WLCSP (0.97x0.97)
60 µA
RFQ
LDL1117S50R
STMicroelectronics
IC REG LINEAR 5V 1.2A SOT223
Nan stok72520 pcs
500 µA
Positive
-
5V
-
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
AP2125K-3.0TRE1
Diodes Incorporated
IC REG LINEAR 3V 300MA SOT23-5
Nan stok13410 pcs
90 µA
Positive
Enable
3V
-
1
300mA
0.3V @ 300mA
65dB (100Hz ~ 1kHz)
Over Current, Over Temperature
AP2125
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
LP2986IMM-3.3
Texas Instruments
IC REG LINEAR 3.3V 200MA 8VSSOP
Nan stok12120 pcs
120 µA
Positive
Enable
3.3V
-
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
MAX664CSA+
Analog Devices Inc./Maxim Integrated
IC REG LIN NEG ADJ 40MA 8SOIC
Nan stok12501 pcs
15 µA
Negative
Current Limit, Enable
-1.3V (-5V)
-16V
1
40mA
0.35V @ 40mA
-
-
MAX664
Tube
-
0°C ~ 70°C
Surface Mount
-16.5V
Adjustable (Fixed)
8-SOIC (0.154', 3.90mm Width)
8-SOIC
-
RFQ
LD1117S33TR
STMicroelectronics
IC REG LINEAR 3.3V 800MA SOT223
Nan stok159730 pcs
10 mA
Positive
-
3.3V
-
1
800mA
1.2V @ 800mA
75dB (120Hz)
Over Current, Over Temperature
LD1117
Tape & Reel (TR)
-
0°C ~ 125°C
Surface Mount
15V
Fixed
TO-261-4, TO-261AA
SOT-223
-
RFQ
MAX1793EUE25+T
Analog Devices Inc./Maxim Integrated
IC REG LIN POS ADJ 1A 16TSSOP
Nan stok18736 pcs
200 µA
Positive
Enable, Reset
1.25V (2.5V)
5V
1
1A
0.45V @ 1A
-
Over Current, Over Temperature, Short Circuit
MAX1793
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
5.5V
Adjustable (Fixed)
16-TSSOP (0.173', 4.40mm Width) Exposed Pad
16-TSSOP-EP
-
RFQ
MIC2937A-5.0BU
Microchip Technology
IC REG LINEAR 5V 750MA TO263-3
Nan stok8600 pcs
300 µA
Positive
-
5V
-
1
750mA
-
-
Over Current, Over Temperature
MIC2937A-5.0
Tube
-
-40°C ~ 125°C
Surface Mount
26V
Fixed
TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
TO-263-3
16 mA
RFQ
LP3982IMMX-ADJ
Texas Instruments
IC REG LIN POS ADJ 300MA 8VSSOP
Nan stok4620 pcs
270 µA
Positive
Enable
1.25V
6V
1
300mA
220mV
-
Over Current, Over Temperature
LP3982
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Adjustable
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
8-VSSOP
-
RFQ
RP154L018B-E2
Nisshinbo Micro Devices Inc.
IC REG LIN 1.8V/1.8V 300MA 8DFN
Nan stok64410 pcs
75 µA
Positive
Enable
1.8V, 1.8V
-
2
300mA, 300mA
0.39V @ 300mA, 0.39V @ 300mA
75dB (1kHz)
Over Current
RP154
Tape & Reel (TR)
RP154x
-40°C ~ 85°C (TA)
Surface Mount
5.25V
Fixed
8-XFDFN Exposed Pad
DFN1216-8
-
RFQ
BA12FP-E2
Rohm Semiconductor
IC REG LINEAR 12V 1A TO252-3
Nan stok23837 pcs
2.5 mA
Positive
-
12V
-
1
1A
-
55dB (120Hz)
Over Current, Over Temperature, Over Voltage
BA12
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
25V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252
5 mA
RFQ
TLV71318PDQNR
Texas Instruments
IC REG LINEAR 1.8V 150MA 4X2SON
Nan stok323380 pcs
75 µA
Positive
Enable
1.8V
-
1
150mA
0.7V @ 150mA
70dB ~ 55dB (100Hz ~ 1MHz)
Over Current, Over Temperature, Reverse Polarity, Short Circuit, Under Voltage Lockout (UVLO)
TLV71318
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
4-XDFN Exposed Pad
4-X2SON (1x1)
-
RFQ
MIC47100YMME-TR
Microchip Technology
IC REG LINEAR POS ADJ 1A 8MSOP
Nan stok13673 pcs
6 µA
Positive
Enable
0.8V
2V
1
1A
0.25V @ 1A
80dB ~ 45dB (1kHz ~ 500kHz)
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
MIC47100
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
3.6V
Adjustable
8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
8-MSOP-EP
-
RFQ
MP8802DJ-2.5-LF-Z
Monolithic Power Systems Inc.
IC REG LIN POS ADJ 250MA TSOT23
Nan stok107240 pcs
155 µA
Positive
Enable
1.25V (2.5V)
5V
1
250mA
0.19V @ 250mA (Typ), -
70db ~ 30dB (1kHz ~ 1MHz)
Over Temperature
MP8802
Tube
-
-40°C ~ 125°C
Surface Mount
6.5V
Adjustable (Fixed)
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
-
RFQ
MAX1976ETT120
Analog Devices Inc./Maxim Integrated
IC REG LINEAR 300MA LDO REG
Nan stok18342 pcs
140 µA
Positive
Enable, Reset
1.2V
-
1
300mA
0.2V @ 300mA
70dB (1kHz)
Over Current, Over Temperature, Short Circuit
-
Bulk
-
-40°C ~ 85°C (TA)
Surface Mount
3.6V
Fixed
6-WDFN Exposed Pad
6-TDFN-EP (3x3)
-
RFQ
LM2936MP-5.0
Texas Instruments
IC REG LINEAR 5V 50MA SOT223-4
Nan stok31021 pcs
9 µA
Positive
-
5V
-
1
50mA
0.4V @ 50mA
60dB (120Hz)
Over Temperature, Reverse Polarity, Short Circuit
LM2936
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
40V
Fixed
TO-261-4, TO-261AA
SOT-223-4
2.5 mA
RFQ
NCP4688DSN28T1G
onsemi
IC REG LINEAR 2.8V 150MA SOT23-5
Nan stok16530 pcs
100 µA
Positive
Enable
2.8V
-
1
150mA
0.28V @ 150mA
80dB ~ 65dB (1kHz ~ 100kHz)
Over Current
NCP4688
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.25V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
ADP1710AUJZ-1.3-R7
Analog Devices Inc.
IC REG LINEAR 1.3V 150MA TSOT5
Nan stok13890 pcs
50 µA
Positive
Enable
1.3V
-
1
150mA
0.25V @ 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
MCP1703AT-2802E/CB
Microchip Technology
IC REG LIN 2.8V 250MA SOT23A-3
Nan stok52370 pcs
5 µA
Positive
-
2.8V
-
1
250mA
0.975V @ 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
TPS70933QDBVRQ1
Texas Instruments
IC REG LINEAR 3.3V 150MA SOT23-5
Nan stok60590 pcs
2.05 µA
Positive
Enable
3.3V
-
1
150mA
1.54V @ 150mA
80dB ~ 52dB (10Hz ~ 1kHz)
Over Current, Over Temperature, Reverse Current, Under Voltage Lockout (UVLO)
TPS70933
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
30V
Fixed
SC-74A, SOT-753
SOT-23-5
350 µA
RFQ
MIC5504-3.3YM5-TR
Microchip Technology
IC REG LINEAR 3.3V 300MA SOT23-5
Nan stok362870 pcs
55 µA
Positive
Enable
3.3V
-
1
300mA
0.38V @ 300mA
60dB (1kHz)
Over Current, Over Temperature
MIC5504
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
65 µA
RFQ
LP590715QDQNRQ1
Texas Instruments
IC REG LINEAR 1.5V 250MA 4X2SON
Nan stok171510 pcs
25 µA
Positive
Enable
1.5V
-
1
250mA
0.25V @ 250mA
90dB ~ 60dB (100Hz ~ 100kHz)
Over Current, Over Temperature, Short Circuit
LP590715
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
4-XDFN Exposed Pad
4-X2SON (1x1)
425 µA
RFQ
MIC49300-1.2WR
Microchip Technology
IC REG LINEAR 1.2V 3A SPAK-5
Nan stok8536 pcs
-
Positive
Enable
1.2V
-
1
3A
0.4V @ 3A
-
Over Current, Over Temperature
MIC49300
Tube
-
-40°C ~ 125°C
Surface Mount
6.5V
Fixed
SPak-5 (5 leads + Tab)
S-PAK-5
-
RFQ
MPQ2019GN-AEC1
Monolithic Power Systems Inc.
IC REG LINEAR POS ADJ 300MA
Nan stok17620 pcs
95 µA
Positive
Enable, Power Good
1.2V
15V
1
300mA
0.55V @ 300mA
45dB (1kHz)
Over Temperature, Short Circuit
-
Tube
Automotive, AEC-Q100
-40°C ~ 125°C (TA)
Surface Mount
40V
Adjustable
8-SOIC (0.154", 3.90mm Width) Exposed Pad
8-SOIC-EP
-
RFQ
TPS75915KC
Texas Instruments
IC REG LINEAR 1.5V 7.5A TO220-5
Nan stok6820 pcs
200 µA
Positive
Enable, Power Good
1.5V
-
1
7.5A
-
58dB (100Hz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TPS75915
Tube
-
-40°C ~ 125°C
Through Hole
5.5V
Fixed
TO-220-5
TO-220-5
-
RFQ
LM7812CT
onsemi
IC REG LINEAR 12V 1A TO220-3
Nan stok17250 pcs
8 mA
Positive
-
12V
-
1
1A
2V @ 1A (Typ)
71dB (120Hz)
Over Temperature, Short Circuit
LM7812
Tube
-
-40°C ~ 125°C
Through Hole
35V
Fixed
TO-220-3
TO-220-3
-
RFQ
MAX5023MASA+T
Analog Devices Inc./Maxim Integrated
IC REG LINEAR 5V 150MA 8SOIC
Nan stok11323 pcs
140 µA
Positive
Enable, Hold, Reset, Watchdog
5V
-
1
150mA
1.5V @ 150mA
54dB (100Hz)
Over Temperature, Reverse Polarity, Short Circuit
MAX5023
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
65V
Fixed
8-SOIC (0.154', 3.90mm Width)
8-SOIC
-
RFQ
NJM78L06UA
Nisshinbo Micro Devices Inc.
IC REG LINEAR 6V 100MA SOT89
Nan stok15680 pcs
6 mA
Positive
-
6V
-
1
100mA
-
67dB (120Hz)
Over Temperature, Short Circuit
-
Tube
-
-40°C ~ 85°C
Surface Mount
30V
Fixed
TO-243AA
SOT-89
-
RFQ
NCP603SN330T1G
onsemi
IC REG LINEAR 3.3V 300MA 5TSOP
Nan stok101380 pcs
180 µA
Positive
Enable
3.3V
-
1
300mA
0.23V @ 300mA
62dB ~ 38dB (120Hz ~ 10kHz)
Over Current, Over Temperature, Transient Voltage
NCP603
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
SOT-23-5 Thin, TSOT-23-5
5-TSOP
-
RFQ
MAX8530EBTJO-T
Analog Devices Inc./Maxim Integrated
IC REG LINEAR LDO
Nan stok40560 pcs
220 µA
Positive
Enable, Reset
2.85V, 2.6V
-
2
200mA, 150mA
0.2V @ 100mA
60dB (100Hz)
Over Current, Over Temperature, Short Circuit
-
Bulk
-
-40°C ~ 85°C (TA)
Surface Mount
6.5V
Fixed
6-WFBGA, CSPBGA
6-UCSP (1.57x1.05)
-
RFQ
TPS76818QDR
Texas Instruments
IC REG LINEAR 1.8V 1A 8SOIC
Nan stok16937 pcs
125 µA
Positive
Enable, Power Good
1.8V
-
1
1A
-
60dB (1kHz)
Over Current, Over Temperature, Reverse Polarity
TPS76818
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
10V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SOIC
-
RFQ
ADP3300ARTZ-5REEL7
Analog Devices Inc.
IC REG LINEAR 5V 50MA SOT23-6
Nan stok34501 pcs
300 µA
Positive
Error Flag, Shutdown
5V
-
1
50mA
0.17V @ 50mA
-
Over Current, Over Temperature
ADP3300
Tape & Reel (TR)
anyCAP®
-40°C ~ 85°C (TA)
Surface Mount
12V
Fixed
SOT-23-6
SOT-23-6
1.7 mA
RFQ
TPS7A0228PDQNR
Texas Instruments
IC REG LINEAR 2.8V 200MA 4X2SON
Nan stok70520 pcs
60 nA
Positive
Enable
2.8V
-
1
200mA
0.36V @ 200mA
55dB (1kHz)
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
TPS7A0228
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
6V
Fixed
4-XDFN Exposed Pad
4-X2SON (1x1)
-
RFQ
ADP7185ACPZN1.2-R7
Analog Devices Inc.
IC REG LINEAR -1.2V 500MA 8LFCSP
Nan stok12646 pcs
900 µA
Negative
Enable, Power On Reset
-1.2V
-
1
500mA
0.36V @ 500mA
80dB ~ 40dB (1kHz ~ 1MHz)
Over Current
ADP7185
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
-5.5V
Fixed
8-UFDFN Exposed Pad, CSP
8-LFCSP (2x2)
7 mA
RFQ
LM78L12ACZXA
onsemi
IC REG LINEAR 12V 100MA TO92-3
Nan stok5730 pcs
6 mA
Positive
-
12V
-
1
100mA
-
65dB (120Hz)
Over Temperature, Short Circuit
LM78L
Tape & Box (TB)
-
-40°C ~ 125°C
Through Hole
35V
Fixed
TO-226-3, TO-92-3 (TO-226AA) Formed Leads
TO-92-3
-
RFQ
NJW4184U2-12A-TE2
Nisshinbo Micro Devices Inc.
IC REG LINEAR 12V 300MA SOT89-5
Nan stok68300 pcs
12 µA
Positive
Enable
12V
-
1
300mA
0.1V @ 100mA
30dB (1kHz)
Over Current, Over Temperature
NJW4184
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
35V
Fixed
SOT-89-5/6
SOT-89-5
-
RFQ
LM317AT
Texas Instruments
IC REG LIN POS ADJ 1.5A TO220-3
Nan stok36334 pcs
10 mA
Positive
-
1.25V
37V
1
1.5A
-
80dB ~ 65dB (120Hz)
Over Current, Over Temperature, Short Circuit
LM317
Tube
-
-40°C ~ 125°C
Through Hole
40V
Adjustable
TO-220-3
TO-220-3
-
RFQ
LDBL20D-33R
STMicroelectronics
IC REG LIN 3.3V 200MA 4STSTAMP
Nan stok86520 pcs
40 µA
Positive
Enable
3.3V
-
1
200mA
-
80dB ~ 55dB (1kHz ~ 100kHz)
Over Current, Over Temperature, Soft Start
LDBL20
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
4-XFQFN
4-STSTAMP (0.47x0.47)
-
RFQ
MC78LC40NTRG
onsemi
IC REG LINEAR 4V 80MA 5TSOP
Nan stok4370 pcs
3.6 µA
Positive
-
4V
-
1
80mA
0.038V @ 1mA
-
-
MC78LC40
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
12V
Fixed
SOT-23-5 Thin, TSOT-23-5
5-TSOP
-
RFQ
LM79L05ACTL
Texas Instruments
IC REG LINEAR -5V 100MA 6DSBGA
Nan stok15860 pcs
6 mA
Negative
-
-5V
-
1
100mA
-
50dB (120Hz)
Over Temperature, Short Circuit
LM79
Tape & Reel (TR)
-
0°C ~ 70°C
Surface Mount
-35V
Fixed
6-WFBGA, DSBGA
6-DSBGA (1.5x1.3)
-
RFQ
RP102Z291D-TR-F
Nisshinbo Micro Devices Inc.
IC REG LIN 2.9V 300MA WLCSP-4-P2
Nan stok60300 pcs
70 µA
Positive
Enable
2.9V
-
1
300mA
0.19V @ 300mA
-
Over Current
RP102
Tape & Reel (TR)
RP102x
-40°C ~ 85°C
Surface Mount
5.25V
Fixed
4-UFBGA, WLCSP
WLCSP-4-P2
-
RFQ
AP139-35WL-7
Diodes Incorporated
IC REG LINEAR 3.5V 300MA SOT25
Nan stok85000 pcs
60 µA
Positive
Enable
3.5V
-
1
300mA
0.45V @ 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
TLV75509PDBVR
Texas Instruments
IC REG LINEAR 0.9V 500MA SOT23-5
Nan stok106850 pcs
31 µA
Positive
Enable
0.9V
-
1
500mA
0.985V @ 500mA
52dB (1kHz ~ 1MHz)
Over Current, Over Temperature
TLV75509
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
BA033F
Rohm Semiconductor
IC REG LINEAR 3.3V 1A TO252
Nan stok14510 pcs
5 mA
Positive
-
3.3V
-
1
1A
0.5V @ 500mA
55dB (120Hz)
Over Current, Over Temperature, Over Voltage
-
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
25V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252
-
RFQ