ICL7662EBA+T
Analog Devices Inc./Maxim Integrated
IC REG CHARGE PUMP INV 8SOIC
En stock7611 pcs
1
Negative
Charge Pump
-Vin
-
No
4.5V
10kHz
-
-
-
-
-
ICL7662
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
20V
Fixed
8-SOIC (0.154', 3.90mm Width)
8-SOIC
Ratiometric
-
RFQ
LM5007MMX
Texas Instruments
IC REG BUCK ADJ 500MA 8VSSOP
En stock6400 pcs
1
Positive
Buck
2.5V
73V
No
9V
-
-
-
-
-
-
LM5007
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
75V
Adjustable
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
8-VSSOP
Step-Down
500mA
RFQ
MCP16321T-250E/NG
Microchip Technology
IC REG BUCK 2.5V 1A 16QFN
En stock43510 pcs
1
Positive
Buck
2.5V
-
Yes
6V
1MHz
-
-
-
-
-
MCP16321
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
24V
Fixed
16-VFQFN Exposed Pad
16-QFN (3x3)
Step-Down
1A
RFQ
LT1506CR#TRPBF
Analog Devices Inc.
IC REG BUCK ADJ 4.5A D2PAK-7
En stock3969 pcs
1
Positive
Buck
2.42V
13.95V
No
4V
500kHz
-
-
-
-
-
LT1506
Tape & Reel (TR)
0°C ~ 125°C (TJ)
-
-
Surface Mount
15V
Adjustable
TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
7-DDPAK
Step-Down
4.5A
RFQ
LT1268CQ#PBF
Analog Devices Inc.
IC REG MULTI CONFG ADJ 5DDPAK
En stock2426 pcs
1
Positive or Negative
Buck, Boost, Flyback
1.244V
60V (Switch)
No
3.5V
150kHz
-
-
-
-
-
LT1268
Tube
0°C ~ 125°C (TJ)
-
-
Surface Mount
30V
Adjustable
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
5-DDPAK
Step-Up, Step-Down, Step-Up/Step-Down
7.5A (Switch)
RFQ
LT3680EDD#PBF
Analog Devices Inc.
IC REG BUCK ADJ 3.5A 10DFN
En stock6239 pcs
1
Positive
Buck
0.79V
30V
No
3.6V
230kHz ~ 2.45MHz
-
-
-
-
-
LT3680
Tube
-40°C ~ 125°C (TJ)
-
-
Surface Mount
36V
Adjustable
10-WFDFN Exposed Pad
10-DFN (3x3)
Step-Down
3.5A
RFQ
NCP1400ASN33T1G
onsemi
IC REG BOOST 3.3V 100MA 5TSOP
En stock12030 pcs
1
Positive
Boost
3.3V
-
No
0.8V
180kHz
-
-
-
-
-
NCP1400
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
3.3V
Fixed
SOT-23-5 Thin, TSOT-23-5
5-TSOP
Step-Up
100mA (Switch)
RFQ
MP8760GL-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJUSTABLE 6A 13QFN
En stock21341 pcs
1
Positive
Buck
0.611V
13V
Yes
4.5V
200kHz ~ 1MHz
-
-
-
-
-
MP8760
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
18V
Adjustable
13-VFQFN
13-QFN (3x4)
Step-Down
6A
RFQ
AOZ1021HAIL
Alpha & Omega Semiconductor Inc.
IC REG BUCK ADJ 3A 8SOIC
En stock15190 pcs
1
Positive
Buck
0.8V
16V
Yes
4.5V
500kHz
-
-
-
-
-
-
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
EZBuck™
Surface Mount
16V
Adjustable
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Down
3A
RFQ
TPS62021DRCRG4
Texas Instruments
IC REG BUCK ADJ 600MA 10VSON
En stock14010 pcs
1
Positive
Buck
0.7V
6V
Yes
2.5V
1.25MHz
-
-
-
-
-
TPS62021
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
6V
Adjustable
10-VFDFN Exposed Pad
10-VSON (3x3)
Step-Down
600mA
RFQ
FAN48630UC315X
onsemi
IC REG BOOST PROG 1.5A 16WLCSP
En stock47220 pcs
1
Positive
Boost
3.15V, 3.33V
-
Yes
2.35V
2.5MHz
-
-
-
-
-
FAN48630
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Fixed
16-UFBGA, WLCSP
16-WLCSP (1.78x1.78)
Step-Up
1.5A
RFQ
LT1534CS#PBF
Analog Devices Inc.
IC REG MULTI CONFG ADJ 2A 16SOIC
En stock5131 pcs
1
Positive or Negative
Boost, Cuk, Flyback
1.25V
35V (Switch)
No
2.7V
20kHz ~ 250kHz
-
-
-
-
-
LT1534
Tube
0°C ~ 125°C (TJ)
-
-
Surface Mount
23V
Adjustable
16-SOIC (0.154', 3.90mm Width)
16-SO
Step-Up, Step-Up/Step-Down
2A (Switch)
RFQ
TPS61085DGKT
Texas Instruments
IC REG BOOST ADJ 2A 8VSSOP
En stock23384 pcs
1
Positive
Boost
2.8V
18.5V
No
2.3V
650kHz, 1.2MHz
-
-
-
-
-
TPS61085
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
6V
Adjustable
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
8-VSSOP
Step-Up
2A (Switch)
RFQ
LM2734ZSD
Texas Instruments
IC REG BUCK ADJUSTABLE 1A 6WSON
En stock17760 pcs
1
Positive
Buck
0.8V
18V
No
3V
3MHz
-
-
-
-
-
LM2734
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
20V
Adjustable
6-WDFN Exposed Pad
6-WSON (3x3)
Step-Down
1A
RFQ
LTC3560ES6#TRPBF
Analog Devices Inc.
IC REG BUCK ADJ 800MA TSOT23-6
En stock9519 pcs
1
Positive
Buck
0.6V
5.5V
Yes
2.5V
2.25MHz
-
-
-
-
-
LTC3560
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Adjustable
SOT-23-6 Thin, TSOT-23-6
TSOT-23-6
Step-Down
800mA
RFQ
AP34063S8L-13
Diodes Incorporated
IC MULTI CONFIG ADJ 1.6A 8SOIC
En stock9570 pcs
1
Positive or Negative
Buck, Boost
1.25V
40V (Switch)
No
3V
100kHz
-
-
-
-
-
AP34063
Cut Tape (CT)
0°C ~ 105°C (TJ)
-
-
Surface Mount
40V
Adjustable
8-SOIC (0.154', 3.90mm Width)
8-SOP
Step-Up, Step-Down
1.6A (Switch)
RFQ
MAX1795EUA
Analog Devices Inc./Maxim Integrated
IC REG BST ADJ/PROG 200MA 8UMAX
En stock17220 pcs
1
Positive
Boost
2V (3.3V, 5V)
5.5V
Yes
1V
500kHz
-
-
-
-
-
MAX1795
Tube
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Adjustable (Programmable)
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-uMAX/uSOP
Step-Up
200mA (Switch)
RFQ
LT1317BCS8
ADI (Analog Devices, Inc.)
IC REG BST SEPIC ADJ 0.71A 8SOIC
En stock3127 pcs
1
Positive
Boost, SEPIC
1.24V
30V (Switch)
No
1.5V
620kHz
Tube
LT1317
Contains lead / RoHS non-compliant
1 (Unlimited)
-
-
-
0°C ~ 70°C (TA)
Boost, SEPIC Switching Regulator IC Positive Adjustable 1.24V 1 Output 710mA (Switch) 8-SOIC (0.154", 3.90mm Width)
-
Surface Mount
12V
Adjustable
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Up, Step-Up/Step-Down
710mA (Switch)
RFQ
LMR16006YDDCT
Texas Instruments
IC REG BUCK ADJ 600MA TSOT23-6
En stock13153 pcs
1
Positive
Buck
0.765V
55V
No
4V
2.1MHz
-
-
-
-
-
LMR16006
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
SIMPLE SWITCHER®
Surface Mount
60V
Adjustable
SOT-23-6 Thin, TSOT-23-6
SOT-23-THIN
Step-Down
600mA
RFQ
MP9457GF-Z
Monolithic Power Systems Inc.
IC REG 4.5-55V INPUT 3A FREQ PRG
En stock32141 pcs
1
Positive
Buck
5V
-
No
18V
-
-
-
-
-
-
MP9457
Tape & Reel (TR)
-
-
-
Surface Mount
36V
Fixed
20-TSSOP (0.173", 4.40mm Width) Exposed Pad
20-TSSOP-EP
Step-Down
3A
RFQ
TPS62227DDCR
Texas Instruments
IC REG BUCK 1.2V 400MA SOT23-5
En stock49830 pcs
1
Positive
Buck
1.2V
-
Yes
2.5V
1.25MHz
-
-
-
-
-
TPS62227
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
6V
Fixed
SOT-23-5 Thin, TSOT-23-5
SOT-23-THIN
Step-Down
400mA
RFQ
LT8620IMSE#PBF
Analog Devices Inc.
IC REG BUCK ADJUSTABLE 2A 16MSOP
En stock4498 pcs
1
Positive
Buck
0.97V
64.75V
Yes
3.4V
200kHz ~ 2.2MHz
-
-
-
-
-
LT8620
Tube
-40°C ~ 125°C (TJ)
-
-
Surface Mount
65V
Adjustable
16-TFSOP (0.118', 3.00mm Width) Exposed Pad
16-MSOP-EP
Step-Down
2A
RFQ
TPS54331QDRQ1
Texas Instruments
IC REG BUCK ADJUSTABLE 3A 8SOIC
En stock18487 pcs
1
Positive
Buck
0.8V
25V
No
3.5V
570kHz
-
-
-
-
-
TPS54331
Tape & Reel (TR)
-40°C ~ 125°C (TA)
-
Automotive, AEC-Q100, SWIFT™, Eco-Mode™
Surface Mount
28V
Adjustable
8-SOIC (0.154', 3.90mm Width)
8-SOIC
Step-Down
3A
RFQ
LT8641EUDC#PBF
Analog Devices Inc.
IC REG BUCK ADJ 3.5A 20QFN
En stock5551 pcs
1
Positive
Buck
0.8V
64.35V
Yes
3V
210kHz ~ 2MHz
-
-
-
-
-
LT8641
Tube
-40°C ~ 125°C (TJ)
-
Silent Switcher®1
Surface Mount
65V
Adjustable
20-WFQFN, 18 Leads, Exposed Pad
20-QFN (3x4)
Step-Down
3.5A
RFQ
MAX5035CUSA+T
Analog Devices Inc./Maxim Integrated
IC REG BUCK 12V 1A 8SOIC
En stock15770 pcs
1
Positive
Buck
12V
-
No
7.5V
125kHz
-
-
-
-
-
MAX5035
Tape & Reel (TR)
0°C ~ 85°C (TA)
-
-
Surface Mount
76V
Fixed
8-SOIC (0.154', 3.90mm Width)
8-SOIC
Step-Down
1A
RFQ
LT8362EDD#PBF
Analog Devices Inc.
IC REG BST SEPIC 2A 10DFN
En stock11164 pcs
1
Positive
Boost, SEPIC
-
60V (Switch)
-
2.8V
300kHz ~ 2MHz
-
-
-
-
-
LT8362
Tube
-40°C ~ 125°C (TJ)
-
-
Surface Mount
60V
Fixed
10-WFDFN Exposed Pad
10-DFN (3x3)
Step-Up
2A (Switch)
RFQ
ACT4503YH-T
Active-Semi
IC REG BUCK 3.5A DL 8SOP
En stock7900 pcs
2
Positive
Buck
-
-
No
7.5V
200kHz
Tape & Reel (TR)
-
Lead free / RoHS Compliant
3 (168 Hours)
1488-1022-2
-
-
-
Buck Switching Regulator IC Positive 2 Output 3.5A 8-SOIC (0.154", 3.90mm Width) Exposed Pad
-
Surface Mount
36V
-
8-SOIC (0.154", 3.90mm Width) Exposed Pad
8-SOP-EP
Step-Down
3.5A
RFQ
TPS62403DRCR
Texas Instruments
IC REG BUCK PROG/2.8V DL 10SON
En stock10450 pcs
2
Positive
Buck
1.1V, 1.575V (2.8V)
-
Yes
2.5V
2.25MHz
-
-
-
-
-
TPS624
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
6V
Programmable (Fixed)
10-VFDFN Exposed Pad
10-VSON (3x3)
Step-Down
400mA, 600mA
RFQ
S-882150AMH-M2ZTFG
ABLIC Inc.
IC REG CHARG PUMP 5V SOT23-6W
En stock40920 pcs
1
Positive
Charge Pump
5V
-
No
1.6V
1MHz
-
-
-
-
-
S-882150
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5V
Fixed
SOT-23-6
SOT-23-6W
Step-Up
25mA
RFQ
MAX761ESA+T
Analog Devices Inc./Maxim Integrated
IC REG BOOST ADJ/12V 1.5A 8SOIC
En stock6110 pcs
1
Positive
Boost
5V (12V)
16.5V
No
2V
300kHz
-
-
-
-
-
MAX761
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
16.5V
Adjustable (Fixed)
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Up
1.5A (Switch)
RFQ
LM61495Q5RPHRQ1
Texas Instruments
10-A AUTOMOTIVE BUCK CONVERTER O
En stock10990 pcs
1
Positive
Buck
5V
-
Yes
3V
200kHz ~ 2.2MHz
-
-
-
-
-
-
Tape & Reel (TR)
-40°C ~ 150°C (TJ)
-
Automotive, AEC-Q100
Surface Mount, Wettable Flank
36V
Fixed
16-PowerVFQFN
16-VQFN-HR (4.5x3.5)
Step-Down
10A
RFQ
TL2575HV-05IKV
Texas Instruments
IC REG BUCK 5V 1A TO220-5
En stock17872 pcs
1
Positive
Buck
5V
-
No
4.75V
52kHz
-
-
-
-
-
TL2575
Tube
-40°C ~ 125°C (TJ)
-
-
Through Hole
60V
Fixed
TO-220-5 Formed Leads
TO-220-5
Step-Down
1A
RFQ
MAX1705EEE
Analog Devices Inc./Maxim Integrated
IC REG BOOST ADJ 1A 16QSOP
En stock15790 pcs
1
Positive
Boost
2.5V
5.5V
No
0.9V
260kHz ~ 340kHz
-
-
-
-
-
MAX1705
Tube
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Adjustable
16-SSOP (0.154', 3.90mm Width)
16-QSOP
Step-Up
1A (Switch)
RFQ
TPS62162DSGT
Texas Instruments
IC REG BUCK 3.3V 1A 8WSON
En stock34119 pcs
1
Positive
Buck
3.3V
-
Yes
3V
2.25MHz
-
-
-
-
-
TPS62162
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
DCS-Control™
Surface Mount
17V
Fixed
8-WFDFN Exposed Pad
8-WSON (2x2)
Step-Down
1A
RFQ
LTC3203BEDD#PBF
Analog Devices Inc.
IC REG CHARGE PUMP ADJ 10DFN
En stock8612 pcs
1
Positive
Charge Pump
0.91V
5V
No
2.7V
900kHz, 1MHz
-
-
-
-
-
LTC3203
Tube
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Adjustable
10-WFDFN Exposed Pad
10-DFN (3x3)
Step-Up
500mA
RFQ
S-8550AA-M5T1U
ABLIC Inc.
IC REG BUCK ADJ 600MA SOT23-5
En stock39490 pcs
1
Positive
Buck
1.1V
4V
Yes
2V
1.2MHz
-
-
-
-
-
S-8550
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Adjustable
SC-74A, SOT-753
SOT-23-5
Step-Down
600mA
RFQ
LTC1044AIN8#PBF
Analog Devices Inc.
IC REG CHARGE PUMP INV 20MA 8DIP
En stock11166 pcs
1
Positive or Negative
Charge Pump
-Vin, 2Vin, Vin/2
-
No
1.5V
1kHz ~ 5kHz
-
-
-
-
-
LTC1044
Tube
-40°C ~ 85°C (TA)
-
-
Through Hole
12V
Fixed
8-DIP (0.300', 7.62mm)
8-PDIP
Ratiometric
20mA
RFQ
MPQ4568GQ-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJ 100MA 10QFN
En stock34370 pcs
1
Positive
Buck
1V
45V
Yes
4.5V
-
-
-
-
-
-
MPQ4568
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
45V
Adjustable
10-VFDFN Exposed Pad
10-QFN (3x3)
Step-Down
100mA
RFQ
LMR14050SSQDDAQ1
Texas Instruments
IC REG BUCK ADJUSTABLE 5A 8SOPWR
En stock15125 pcs
1
Positive
Buck
0.8V
28V
No
4V
200kHz ~ 2.5MHz
-
-
-
-
-
LMR14050
Tube
-40°C ~ 125°C (TJ)
-
Automotive, AEC-Q100, SIMPLE SWITCHER®
Surface Mount
40V
Adjustable
8-PowerSOIC (0.154', 3.90mm Width)
8-SO PowerPad
Step-Down
5A
RFQ
S-8353A50UA-IRJT2G
ABLIC Inc.
IC REG BOOST 5V 300MA SOT89-3
En stock43080 pcs
1
Positive
Boost
5V
-
No
0.9V
50kHz
-
-
-
-
-
S-8353
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
10V
Fixed
TO-243AA
SOT-89-3
Step-Up
300mA (Switch)
RFQ
TPS562200DDCT
Texas Instruments
IC REG BUCK ADJ 2A TSOT23-6
En stock55300 pcs
1
Positive
Buck
0.765V
7V
Yes
4.5V
650kHz
-
-
-
-
-
TPS562200
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
D-CAP2™, Eco-Mode™
Surface Mount
17V
Adjustable
SOT-23-6 Thin, TSOT-23-6
SOT-23-THIN
Step-Down
2A
RFQ
EL7534IYZ
Renesas Electronics America Inc
IC REG BUCK ADJ 600MA 10MSOP
En stock18843 pcs
1
Positive
Buck
0.8V
5.5V
Yes
2.5V
1.5MHz
-
-
-
-
-
EL7534
Tube
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Adjustable
10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
10-MSOP
Step-Down
600mA
RFQ
MAX16904SAUE50/V+
Analog Devices Inc./Maxim Integrated
IC REG BUCK 5V 600MA 16TSSOP
En stock5274 pcs
1
Positive
Buck
5V
-
Yes
3.5V
2.1MHz
-
-
-
-
-
MAX16904
Tube
-40°C ~ 125°C (TJ)
-
Automotive, AEC-Q100
Surface Mount
28V
Fixed
16-TSSOP (0.173", 4.40mm Width) Exposed Pad
16-TSSOP-EP
Step-Down
600mA
RFQ
RT6224DHGJ6F
Richtek USA Inc.
IC REG BUCK ADJ 3A TSOT23-6
En stock103420 pcs
1
Positive
Buck
0.6V
5V
Yes
4.3V
1.4MHz
-
-
-
-
-
RT6224
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
ACOT™
Surface Mount
18V
Adjustable
SOT-23-6 Thin, TSOT-23-6
TSOT-23-6 (FC)
Step-Down
3A
RFQ
LM2596T-12
Texas Instruments
IC REG BUCK 12V 3A TO220-5
En stock13740 pcs
1
Positive
Buck
12V
-
No
4.5V
150kHz
-
-
-
-
-
LM2596
Tube
-40°C ~ 125°C (TJ)
-
SIMPLE SWITCHER®
Through Hole
40V
Fixed
TO-220-5 Formed Leads
TO-220-5
Step-Down
3A
RFQ
MIC2295YML-TR
Microchip Technology
IC REG BOOST ADJ 1.2A 8MLF
En stock24803 pcs
1
Positive
Boost
2.5V
34V (Switch)
No
2.5V
1.2MHz
-
-
-
-
-
MIC2295
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
10V
Adjustable
8-VFDFN Exposed Pad, 8-MLF®
8-MLF® (2x2)
Step-Up
1.2A (Switch)
RFQ
TPS62237DRYT
Texas Instruments
IC REG BUCK 3.3V 500MA 6SON
En stock40204 pcs
1
Positive
Buck
3.3V
-
Yes
2.05V
2MHz
-
-
-
-
-
TPS62237
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
6V
Fixed
6-UFDFN
6-SON (1.45x1)
Step-Down
500mA
RFQ
SIC413CB-T1-E3
Vishay Siliconix
IC REG BUCK ADJUSTABLE 4A 8SO
En stock11950 pcs
1
Positive
Buck
0.6V
13.2V
Yes
4.75V
500kHz
-
-
-
-
-
SIC413
Tape & Reel (TR)
-25°C ~ 125°C (TJ)
-
microBUCK®
Surface Mount
26V
Adjustable
8-SOIC (0.154', 3.90mm Width)
8-SOIC
Step-Down
4A
RFQ
TPS54418ARTER
Texas Instruments
IC REG BUCK ADJUSTABLE 4A 16WQFN
En stock24324 pcs
1
Positive
Buck
0.8V
4.5V
Yes
2.95V
200kHz ~ 2MHz
-
-
-
-
-
TPS54418
Tape & Reel (TR)
-40°C ~ 150°C (TJ)
-
SWIFT™
Surface Mount
6V
Adjustable
16-WFQFN Exposed Pad
16-WQFN (3x3)
Step-Down
4A
RFQ
MP1567DQ-LF-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJ 1.2A 10QFN
En stock30347 pcs
1
Positive
Buck
0.9V
4.5V
Yes
2.6V
800kHz
-
-
-
-
-
MP1567
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
6V
Adjustable
10-VFDFN Exposed Pad
10-QFN (3x3)
Step-Down
1.2A
RFQ