R1172H251D-T1-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 2.5V 1A SOT89-5
Á lager80470 pcs
100 µA
Positive
Enable
2.5V
-
1
1A
0.32V @ 1A
70dB (1kHz)
Over Current, Over Temperature
R1172
Tape & Reel (TR)
R1172x
-40°C ~ 85°C
Surface Mount
6V
Fixed
SOT-89-5/6
SOT-89-5
-
RFQ
TPS7A8001DRBR
Texas Instruments
IC REG LINEAR POS ADJ 1A 8SON
Á lager40089 pcs
100 µA
Positive
Enable
0.8V
6V
1
1A
0.5V @ 1A
48dB ~ 38dB (100Hz ~ 1MHz)
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
TPS7A8001
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
6.5V
Adjustable
8-VDFN Exposed Pad
8-SON (3x3)
350 µA
RFQ
LT3028EFE#PBF
Analog Devices Inc.
IC REG LINEAR POS ADJ 16TSSOP
Á lager9816 pcs
-
Positive
Enable
1.22V
20V
2
100mA, 500mA
0.45V @ 100mA, 0.47V @ 500mA
65dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT3028
Tube
-
-40°C ~ 125°C
Surface Mount
20V
Adjustable
16-TSSOP (0.173", 4.40mm Width) Exposed Pad
16-TSSOP-EP
-
RFQ
LT1963AES8-3.3
Linear Technology
LT1963A - 1.5A, LOW NOISE, FAST
Á lager14032 pcs
1.5 mA
Positive
Enable
3.3V
-
1
1.5A
0.55V @ 1.5A
63dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
-
Bulk
-
-40°C ~ 125°C (TJ)
Surface Mount
20V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SO
120 mA
RFQ
MC7808CD2TR4
onsemi
IC REG LINEAR 8V 1A D2PAK
Á lager14270 pcs
8 mA
Positive
-
8V
-
1
1A
2V @ 1A (Typ)
62dB (120Hz)
Over Temperature, Short Circuit
MC7808
Tape & Reel (TR)
-
0°C ~ 125°C
Surface Mount
35V
Fixed
TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
D2PAK-3
-
RFQ
ADP3334ACP-REEL7
Analog Devices Inc.
IC REG LINEAR 1.5V 500MA 8LFCSP
Á lager26977 pcs
130 µA
Positive
Feedback, Shutdown
1.5V
10V
1
500mA
0.4V @ 500mA
-
Over Current, Over Temperature
ADP3334
Bulk
anyCAP®
-40°C ~ 85°C (TA)
Surface Mount
11V
Adjustable
8-WFDFN Exposed Pad, CSP
8-LFCSP (3x3)
10 mA
RFQ
AAT3221IJS-1.8-T1
Skyworks Solutions Inc.
IC REG LINEAR 1.8V 150MA 8SC70JW
Á lager186400 pcs
2.5 µA
Positive
Enable
1.8V
-
1
150mA
-
50dB (100Hz)
Over Current, Over Temperature, Short Circuit
-
Tape & Reel (TR)
NanoPower™
-40°C ~ 85°C
Surface Mount
5.5V
Fixed
8-TFSOJ (0.069", 1.75mm Width)
8-SC70JW
-
RFQ
AS1360-30-T
ams OSRAM
IC REG LINEAR 3V 150MA SOT23-3
Á lager17200 pcs
1.5 µA
Positive
-
3V
-
1
150mA
0.7V @ 160mA
-
Over Current, Short Circuit
-
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
20V
Fixed
TO-236-3, SC-59, SOT-23-3
SOT-23-3
3 µA
RFQ
MIC5271-5.0YM5-TR
Microchip Technology
IC REG LINEAR -5V 100MA SOT23-5
Á lager25385 pcs
-
Negative
Enable
-5V
-
1
100mA
0.9V @ 100mA
50dB (120Hz)
Over Current, Over Temperature
MIC5271
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
-16V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
S-817A38ANB-CVBT2U
ABLIC Inc.
IC REG LINEAR 3.8V 50MA SC82AB
Á lager94640 pcs
2.5 µA
Positive
-
3.8V
-
1
50mA
0.35V @ 10mA
-
Short Circuit
S-817
Tape & Reel (TR)
S-817
-40°C ~ 85°C (TA)
Surface Mount
10V
Fixed
SC-82A, SOT-343
SC-82AB
-
RFQ
BA178M09T
Rohm Semiconductor
IC REG LINEAR 9V 500MA TO220FP
Á lager35845 pcs
4.5 mA
Positive
-
9V
-
1
500mA
2V @ 500mA (Typ)
67dB (120Hz)
-
BA178M09
Bulk
-
-40°C ~ 85°C
Through Hole
24V
Fixed
TO-220-3 Full Pack
TO-220FP
6 mA
RFQ
ZXTR2005K-13
Diodes Incorporated
IC REG LINEAR 5V 50MA TO252
Á lager148250 pcs
500 µA
Positive
-
5V
-
1
50mA
-
45dB (100Hz)
-
ZXTR2005
Tape & Reel (TR)
Automotive, AEC-Q101
-40°C ~ 125°C
Surface Mount
100V
Fixed
TO-252-3, DPak (2 Leads + Tab), SC-63
TO-252-3
900 µA
RFQ
TLS710B0EJV50XUMA1
Infineon Technologies
IC REG LIN 5V 100MA 8DSO E-PAD
Á lager37400 pcs
5 µA
Positive
Enable
5V
-
1
100mA
0.5V @ 100mA
60dB (100Hz)
Over Current, Over Temperature, Short Circuit
TLS710
Tape & Reel (TR)
Automotive, AEC-Q100, OPTIREG™
-40°C ~ 150°C (TJ)
Surface Mount
40V
Fixed
8-SOIC (0.154", 3.90mm Width) Exposed Pad
PG-DSO-8
80 µA
RFQ
MCP1825S-3002E/DB
Microchip Technology
IC REG LINEAR 3V 500MA SOT223-3
Á lager73710 pcs
220 µA
Positive
-
3V
-
1
500mA
0.35V @ 500mA
60dB (100Hz)
Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
MCP1825
Tube
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
TO-261-4, TO-261AA
SOT-223-3
-
RFQ
BH25MA3WHFV-TR
Rohm Semiconductor
IC REG LINEAR 2.5V 300MA 6HVSOF
Á lager128880 pcs
95 µA
Positive
Enable
2.5V
-
1
300mA
0.09V @ 100mA
60dB (1kHz)
Over Current, Over Temperature
BH25MA3
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
5.5V
Fixed
6-SMD, Flat Lead Exposed Pad
6-HVSOF
-
RFQ
MAX8864TEUK+T
Analog Devices Inc./Maxim Integrated
IC REG LIN POS ADJ 120MA SOT23-5
Á lager36706 pcs
150 µA
Positive
Enable
1.25V (3.15V)
6.5V
1
120mA
0.12V @ 50mA
62dB (300Hz)
Over Current, Over Temperature, Reverse Polarity, Short Circuit
MAX886
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
6.5V
Adjustable (Fixed)
SC-74A, SOT-753
SOT-23-5
80 µA
RFQ
AP2121AK-3.0TRE1
Diodes Incorporated
IC REG LINEAR 3V 200MA SOT23-5
Á lager151790 pcs
50 µA
Positive
Enable
3V
-
1
200mA
0.5V @ 200mA
70dB (1kHz)
Over Current
AP2121
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
L4995RK
STMicroelectronics
IC REG LIN 5V 500MA POWERSSO-24
Á lager11850 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
MC7806BT
onsemi
IC REG LINEAR 6V 1A TO220AB
Á lager4520 pcs
8 mA
Positive
-
6V
-
1
1A
2V @ 1A (Typ)
65dB (120Hz)
Over Temperature, Short Circuit
MC7806
Tube
-
-40°C ~ 125°C
Through Hole
35V
Fixed
TO-220-3
TO-220
-
RFQ
AS7805AT-G1
Diodes Incorporated
IC REG LINEAR 5V 1A TO220-3
Á lager15420 pcs
6 mA
Positive
-
5V
-
1
1A
2V @ 1A (Typ)
70dB (120Hz)
Over Temperature, Short Circuit
AS7805
Tube
-
-40°C ~ 125°C
Through Hole
25V
Fixed
TO-220-3
TO-220-3
-
RFQ
LP38692SD-2.5
Texas Instruments
IC REG LINEAR 2.5V 1A 6WSON
Á lager6370 pcs
55 µA
Positive
-
2.5V
-
1
1A
1.3V @ 1A
55dB (120Hz)
Over Temperature
LP38692
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
10V
Fixed
6-WDFN Exposed Pad
6-WSON (3x3)
100 µA
RFQ
TC1017R-2.5VLTTR
Microchip Technology
IC REG LINEAR 2.5V 150MA SC70-5
Á lager68120 pcs
90 µA
Positive
Enable
2.5V
-
1
150mA
0.5V @ 150mA
58dB (1kHz)
Over Current, Over Temperature
TC1017
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
5-TSSOP, SC-70-5, SOT-353
SC-70-5
-
RFQ
R1173D001D-TR-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR POS ADJ 1A 6HSON
Á lager70230 pcs
100 µA
Positive
Enable
1V
6V
1
1A
-
70dB (1kHz)
Over Current, Over Temperature
R1173
Tape & Reel (TR)
R1173x
-40°C ~ 85°C
Surface Mount
6V
Adjustable
6-SMD, Flat Lead Exposed Pad
6-HSON (2.9x2.8)
-
RFQ
KA78L05AZBU
onsemi
IC REG LINEAR 5V 100MA TO92-3
Á lager17960 pcs
5.5 mA
Positive
-
5V
-
1
100mA
-
80dB (120Hz)
Over Temperature, Short Circuit
KA78L05
Bulk
-
-40°C ~ 125°C
Through Hole
30V
Fixed
TO-226-3, TO-92-3 (TO-226AA)
TO-92-3
-
RFQ
TLE42644GHTSA3
Infineon Technologies
IC REG LINEAR 5V 100MA SOT223-4
Á lager22537 pcs
60 µA
Positive
-
5V
-
1
100mA
0.5V @ 100mA
68dB (100Hz)
Over Current, Over Temperature, Reverse Polarity, Short Circuit
TLE42644
Tape & Reel (TR)
Automotive, AEC-Q100, OPTIREG™
-40°C ~ 150°C (TJ)
Surface Mount
40V
Fixed
TO-261-4, TO-261AA
PG-SOT223-4
4 mA
RFQ
TPS76150DBVT
Texas Instruments
IC REG LINEAR 5V 100MA SOT23-5
Á lager39077 pcs
115 µA
Positive
Enable
5V
-
1
100mA
0.28V @ 100mA
63dB (1kHz)
Over Current, Over Temperature, Reverse Polarity, Transient Voltage
TPS76150
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
16V
Fixed
SC-74A, SOT-753
SOT-23-5
4 mA
RFQ
LP38842S-1.5
Texas Instruments
IC REG LINEAR 1.5V 1.5A DDPAK
Á lager16760 pcs
30 µA
Positive
Enable
1.5V
-
1
1.5A
0.315V @ 1.5A
80dB ~ 65dB (120Hz ~ 1kHz)
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
LP38842
Tube
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
DDPAK/TO-263-5
40 mA
RFQ
AP1117E25L-13
Diodes Incorporated
IC REG LINEAR 2.5V 1A SOT223
Á lager13340 pcs
10 mA
Positive
-
2.5V
-
1
1A
1.4V @ 1A
60dB (180Hz)
Over Current, Over Temperature
AP1117
Tape & Reel (TR)
-
0°C ~ 125°C (TJ)
Surface Mount
18V
Fixed
TO-261-4, TO-261AA
SOT-223-3
-
RFQ
R1190S100B-E2-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 10V 1A 6HSOP
Á lager67350 pcs
220 µA
Positive
Enable
10V
-
1
1A
1.3V @ 1A
60dB (1kHz)
Over Current, Over Temperature, Short Circuit
R1190
Tape & Reel (TR)
R1190x
-40°C ~ 85°C
Surface Mount
16V
Fixed
6-SOIC Variation (0.154", 3.90mm Width), 4 Leads + 2 Fins
6-HSOP-J
-
RFQ
LP3981IMM-3.3
Texas Instruments
IC REG LINEAR 3.3V 300MA 8VSSOP
Á lager43480 pcs
120 µA
Positive
Enable
3.3V
-
1
300mA
0.2V @ 300mA
50dB ~ 55dB (1kHz ~ 10kHz)
Over Current, Over Temperature, Short Circuit
LP3981
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
8-VSSOP
210 µA
RFQ
RH5RZ30CA-T1-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 3V 100MA SOT89-3
Á lager75150 pcs
40 µA
Positive
Enable
3V
-
1
100mA
0.3V @ 60mA
55dB (1kHz)
Over Current
RH5RZ30
Tape & Reel (TR)
Rx5RZ
-40°C ~ 85°C
Surface Mount
8V
Fixed
TO-243AA
SOT-89-3
-
RFQ
LK112M55TR
STMicroelectronics
IC REG LINEAR 5.5V 150MA SOT23-5
Á lager6870 pcs
250 µA
Positive
Enable
5.5V
-
1
150mA
0.35V @ 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
MIC5236-3.3YMM
Microchip Technology
IC REG LINEAR 3.3V 150MA 8MSOP
Á lager14541 pcs
30 µA
Positive
Enable
3.3V
-
1
150mA
0.5V @ 150mA
-
Load Dump, Over Current, Over Temperature, Over Voltage, Reverse Polarity
MIC5236
Tube
-
-40°C ~ 125°C
Surface Mount
30V
Fixed
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
8-MSOP
5 mA
RFQ
LT3008MPTS8-1.8#TRMPBF
Analog Devices Inc.
IC REG LINEAR 1.8V 20MA TSOT23-8
Á lager5676 pcs
6 µA
Positive
Enable
1.8V
-
1
20mA
0.5V @ 20mA
64dB (120Hz)
Over Current, Over Temperature, Reverse Polarity
LT3008
Tape & Reel (TR)
-
-55°C ~ 125°C
Surface Mount
45V
Fixed
SOT-23-8 Thin, TSOT-23-8
TSOT-23-8
1.2 mA
RFQ
ADP151TUJZ3.3-EPR2
Analog Devices Inc.
200MA 3.3VO EP LDO
Á lager9940 pcs
20 µA
Positive
Enable
3.3V
-
1
200mA
0.23V @ 200mA
70dB ~ 55dB (10kHz ~ 100kHz)
Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
-
Tape & Reel (TR)
-
-55°C ~ 125°C (TA)
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
350 µA
RFQ
LX8117B-05CST
Microsemi Corporation
IC REG LIN 5V 1.2A SOT223 POWER
Á lager10400 pcs
10 mA
Positive
-
5V
-
1
1.2A
1.3V @ 1.2A
75dB (120Hz)
Over Current, Short Circuit
LX8117
Tube
-
0°C ~ 125°C
Surface Mount
15V
Fixed
TO-261-4, TO-261AA
SOT-223, Power
-
RFQ
MIC47100YMME-TR
Microchip Technology
IC REG LINEAR POS ADJ 1A 8MSOP
Á lager13673 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
MC7809ACTG
onsemi
IC REG LINEAR 9V 1A TO220AB
Á lager77320 pcs
6 mA
Positive
-
9V
-
1
1A
2V @ 1A (Typ)
61dB (120Hz)
Over Temperature, Short Circuit
MC7809
Tube
-
0°C ~ 125°C
Through Hole
35V
Fixed
TO-220-3
TO-220
-
RFQ
MIC5255-3.0YM5-TR
Microchip Technology
IC REG LINEAR 3V 150MA SOT23-5
Á lager91480 pcs
150 µA
Positive
Enable
3V
-
1
150mA
0.25V @ 150mA
60dB ~ 50dB (10Hz ~ 10kHz)
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
MIC5255
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-23-5
-
RFQ
LP38856S-1.2
Texas Instruments
IC REG LIN 1.2V 3A DDPAK/TO263-5
Á lager17900 pcs
300 µA
Positive
Enable
1.2V
-
1
3A
0.45V @ 3A
80dB ~ 65dB (120Hz ~ 1kHz)
Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
LP38856
Tube
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
DDPAK/TO-263-5
15 mA
RFQ
R1173H001B-T1-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR POS ADJ 1A SOT89-5
Á lager59630 pcs
100 µA
Positive
Enable
1V
6V
1
1A
-
70dB (1kHz)
Over Current, Over Temperature
R1173
Tape & Reel (TR)
R1173x
-40°C ~ 85°C
Surface Mount
6V
Adjustable
SOT-89-5/6
SOT-89-5
-
RFQ
ISL78302ARNWZ
Renesas Electronics America Inc
IC REG LINEAR 1.2V/3.3V 10DFN
Á lager28553 pcs
36 µA
Positive
Enable, Power On Reset
1.2V, 3.3V
-
2
300mA, 300mA
-, 0.3V @ 300mA (Typ)
-
Over Current, Over Temperature
ISL78302
Tube
Automotive, AEC-Q100
-40°C ~ 105°C
Surface Mount
6.5V
Fixed
10-VFDFN Exposed Pad
10-DFN (3x3)
55 µA
RFQ
MC33275ST-3.3T3G
onsemi
IC REG LINEAR 3.3V 300MA SOT223
Á lager94240 pcs
200 µA
Positive
-
3.3V
-
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
MCP1700T-3302E/TTVAO
Microchip Technology
IC REG LINEAR 3.3V 250MA SOT23-3
Á lager6180 pcs
4 µA
Positive
-
3.3V
-
1
250mA
0.35V @ 250mA
44dB (100Hz)
Over Current, Over Temperature, Short Circuit
MCP1700
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
6V
Fixed
TO-236-3, SC-59, SOT-23-3
SOT-23-3
-
RFQ
RP112Q332B-TR-FE
Nisshinbo Micro Devices Inc.
IC REG LINEAR 3.3V 150MA SC88A
Á lager95040 pcs
100 µA
Positive
Enable
3.3V
-
1
150mA
0.28V @ 150mA
80dB ~ 65dB (1kHz ~ 100kHz)
Over Current
RP112
Tape & Reel (TR)
RP112x
-40°C ~ 85°C (TA)
Surface Mount
5.25V
Fixed
5-TSSOP, SC-70-5, SOT-353
SC-88A
-
RFQ
ADP151ACBZ-1.2-R7
Analog Devices Inc.
IC REG LINEAR 1.2V 200MA 4WLCSP
Á lager67590 pcs
20 µA
Positive
Enable
1.2V
-
1
200mA
-
-
Over Current, Over Temperature, Under Voltage Lockout (UVLO)
ADP151
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
4-WFBGA, WLCSP
4-WLCSP (0.76x0.76)
350 µA
RFQ
ISL78301FVECZ-T
Renesas Electronics America Inc
IC REG LIN POS ADJ 14HTSSOP
Á lager26558 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
NCP161AFCT330T2G
onsemi
IC REG LINEAR 3.3V 450MA 4WLCSP
Á lager301750 pcs
23 µA
Positive
Enable
3.3V
-
1
450mA
0.26V @ 450mA
91dB ~ 48dB (100Hz ~ 100kHz)
Over Current, Over Temperature, Soft Start
NCP161
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
5.5V
Fixed
4-XFBGA, WLCSP
4-WLCSP (0.64x0.64)
-
RFQ
KA78T05
onsemi
IC REG LINEAR 5V 3A TO220-3
Á lager10700 pcs
6 mA
Positive
-
5V
-
1
3A
2.5V @ 3A
75dB (120Hz)
Over Temperature, Short Circuit
KA78T05
Bulk
-
0°C ~ 125°C
Through Hole
35V
Fixed
TO-220-3
TO-220-3
-
RFQ
SI-3033KS-TL
Sanken
IC REG LINEAR 3.3V 1A 8SOP
Á lager61400 pcs
350 µA
Positive
-
3.3V
-
1
1A
0.6V @ 1A
55dB (100Hz ~ 120Hz)
Over Current, Over Temperature
SI-3033
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
17V
Fixed
8-SOIC (0.173", 4.40mm Width)
8-SOP
-
RFQ