LTC3606BEDD#TRPBF
Analog Devices Inc.
IC REG BUCK ADJ 800MA 8DFN
Быть в наличии8563 pcs
1
Positive
Buck
0.6V
5V
Yes
2.5V
2.25MHz
-
-
-
-
LTC3606
Tape & Reel (TR)
-40°C ~ 85°C (TJ)
-
-
-
Surface Mount
5.5V
Adjustable
8-WFDFN Exposed Pad
8-DFN (3x3)
Step-Down
800mA
RFQ
NJM2360AM
Nisshinbo Micro Devices Inc.
IC REG DC/DC CONVERTER 8DMP
Быть в наличии13350 pcs
1
Positive
Buck
1.25V
40V
-
2.5V
100Hz ~ 100kHz
-
-
-
-
-
Tube
-40°C ~ 85°C
-
-
-
Surface Mount
40V
Adjustable
8-SOIC (0.197", 5.00mm Width)
8-DMP
Step-Down
1.5A (Switch)
RFQ
SP6669BEK-L/TRR3
MaxLinear, Inc.
IC REG BUCK 1.2V 600MA SOT23-5
Быть в наличии6960 pcs
1
Positive
Buck
1.2V
-
Yes
2.5V
1.5MHz
-
-
-
-
-
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
Step-Down
600mA
RFQ
LT1506IS8#PBF
Analog Devices Inc.
IC REG BUCK ADJ 4.5A 8SOIC
Быть в наличии3411 pcs
1
Positive
Buck
2.42V
13.95V
No
4V
500kHz
-
-
-
-
LT1506
Tube
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
15V
Adjustable
8-SOIC (0.154", 3.90mm Width)
8-SO
Step-Down
4.5A
RFQ
FAN4855MTC
Fairchild Semiconductor
SWITCHING REGLTR, VOLTAGE-MODE
Быть в наличии52090 pcs
1
Positive
Boost
3V
5V
Yes
1.6V
-
-
-
-
-
-
Tube
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
4.5V
Adjustable
8-TSSOP (0.173", 4.40mm Width)
8-TSSOP
Step-Up
500mA (Switch)
RFQ
TPS82695SIPR
Texas Instruments
IC REG BUCK 2.5V 500MA 8USIP
Быть в наличии31296 pcs
1
Positive
Buck
2.5V
-
Yes
2.3V
4MHz
-
-
-
-
TPS82695
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
4.35V
Fixed
8-SMD Module
8-uSIP (2.9x2.3)
Step-Down
500mA
RFQ
NB671LBGQ-P
MPS (Monolithic Power Systems)
IC REG BUCK ADJ 6A SYNC
Быть в наличии29388 pcs
1
Positive
Buck
0.604V
5.5V
Yes
4.5V
500kHz
Tape & Reel (TR)
Lead free / RoHS Compliant
1 (Unlimited)
1589-1345-2
-
-
-40°C ~ 125°C (TJ)
16 Weeks
Buck Switching Regulator IC Positive Adjustable 0.604V 1 Output 6A 14-VFQFN Exposed Pad
-
Surface Mount
22V
Adjustable
14-VFQFN Exposed Pad
16-QFN (3x3)
Step-Down
6A
RFQ
TPS562201DDCT
Texas Instruments
IC REG BUCK ADJ 2A TSOT23-6
Быть в наличии44280 pcs
1
Positive
Buck
0.768V
7V
Yes
4.5V
580kHz
-
-
-
-
TPS562201
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
D-CAP2™, Eco-Mode™
Surface Mount
17V
Adjustable
SOT-23-6 Thin, TSOT-23-6
SOT-23-THIN
Step-Down
2A
RFQ
LTC1265CS-5#TRPBF
Analog Devices Inc.
IC REG MULT CONFG 5V 1.2A 14SOIC
Быть в наличии6098 pcs
1
Positive or Negative
Buck, Buck-Boost, SEPIC
5V
-
No
4V
Up to 700kHz
-
-
-
-
LTC1265
Tape & Reel (TR)
0°C ~ 70°C (TA)
-
-
-
Surface Mount
13V
Fixed
14-SOIC (0.154', 3.90mm Width)
14-SO
Step-Down, Step-Up/Step-Down
1.2A (Switch)
RFQ
MP2363DN-LF
Monolithic Power Systems Inc.
IC REG BUCK ADJUSTABLE 3A 8SOIC
Быть в наличии13250 pcs
1
Positive
Buck
0.92V
21V
No
4.75V
365kHz
-
-
-
-
MP2363
Tube
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
27V
Adjustable
8-SOIC (0.154", 3.90mm Width) Exposed Pad
8-SOIC-EP
Step-Down
3A
RFQ
SN1208057RTER
Texas Instruments
IC REG BUCK ADJUSTABLE 6A 16WQFN
Быть в наличии23839 pcs
1
Positive
Buck
0.6V
4.5V
Yes
2.95V
200kHz ~ 2MHz
-
-
-
-
SN1208057
Tape & Reel (TR)
-40°C ~ 150°C
-
-
SWIFT™
Surface Mount
6V
Adjustable
16-WFQFN Exposed Pad
16-WQFN (3x3)
Step-Down
6A
RFQ
LTC3413EFE#PBF
Analog Devices Inc.
IC REG BUCK ADJ 3A 16TSSOP
Быть в наличии6556 pcs
1
Positive
Buck
1.125V
5.5V
Yes
2.25V
1MHz
-
-
-
-
LTC3413
Tube
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
5.5V
Adjustable
16-TSSOP (0.173', 4.40mm Width) Exposed Pad
16-TSSOP-EP
Step-Down
3A
RFQ
MIC2177-3.3YWM
Microchip Technology
IC REG BUCK 3.3V 2.5A 20SOIC
Быть в наличии3673 pcs
1
Positive
Buck
3.3V
-
No
4.5V
200kHz
-
-
-
-
MIC2177
Tube
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
16.5V
Fixed
20-SOIC (0.295', 7.50mm Width)
20-SOIC
Step-Down
2.5A
RFQ
LV58063MX-TLM-H
onsemi
IC REG BUCK ADJUSTABLE 3A 8MFP
Быть в наличии3600 pcs
1
Positive
Buck
0.8V
22.4V
Yes
8V
370kHz
-
-
-
-
LV580
Tape & Reel (TR)
-20°C ~ 80°C (TA)
-
-
-
Surface Mount
28V
Adjustable
8-SOIC (0.173', 4.40mm Width) Exposed Pad
8-MFP
Step-Down
3A
RFQ
TPS54540BDDAR
Texas Instruments
IC REG CTRLR
Быть в наличии14411 pcs
1
Positive
Buck, Split Rail
0.8V
41.1V
No
4.5V
500kHz
-
-
-
-
TPS54540
Tape & Reel (TR)
-40°C ~ 150°C (TJ)
-
-
Eco-Mode™
Surface Mount
42V
Adjustable
8-PowerSOIC (0.154", 3.90mm Width)
8-SO PowerPad
Step-Down
5A
RFQ
LTC3251EMSE-1.5#PBF
Analog Devices Inc.
IC REG CHARGE PUMP 1.5V 10MSOP
Быть в наличии11790 pcs
1
Positive
Charge Pump
1.5V
-
No
2.7V
1MHz ~ 1.6MHz
-
-
-
-
LTC3251
Tube
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
5.5V
Fixed
10-TFSOP, 10-MSOP (0.118', 3.00mm Width) Exposed Pad
10-MSOP-EP
Step-Down
500mA
RFQ
LTC3415EUHF#PBF
Analog Devices Inc.
IC REG BUCK ADJUSTABLE 7A 38QFN
Быть в наличии3612 pcs
1
Positive
Buck
0.6V
5.5V
Yes
2.375V
1.5MHz
-
-
-
-
LTC3415
Tube
-40°C ~ 85°C (TA)
-
-
PolyPhase®
Surface Mount
5.5V
Adjustable
38-WFQFN Exposed Pad
38-QFN (5x7)
Step-Down
7A
RFQ
LTC3103EMSE#TRPBF
Analog Devices Inc.
IC REG BUCK ADJ 300MA 10MSOP
Быть в наличии10516 pcs
1
Positive
Buck
0.6V
13.8V
Yes
2.5V
1.2MHz
-
-
-
-
LTC3103
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
15V
Adjustable
10-TFSOP, 10-MSOP (0.118', 3.00mm Width) Exposed Pad
10-MSOP-EP
Step-Down
300mA
RFQ
MP28255EL-LF-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJUSTABLE 4A
Быть в наличии18590 pcs
1
Positive
Buck
0.8V
5V
No
4.5V
500kHz
-
-
-
-
MP28255
Tape & Reel (TR)
-20°C ~ 85°C (TA)
-
-
-
Surface Mount
21V
Adjustable
14-VFDFN Exposed Pad
14-QFN (3x4)
Step-Down
4A
RFQ
LTC3624EDD-23.3#PBF
Linear Technology
LTC3624 - 17V, 2A SYNCHRONOUS ST
Быть в наличии12290 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
-
-
*
-
-
-
-
-
-
-
RFQ
TPS54229DDAR
Texas Instruments
IC REG BUCK ADJUSTABLE 2A 8SOPWR
Быть в наличии79890 pcs
1
Positive
Buck
0.76V
7V
Yes
4.5V
650kHz
-
-
-
-
TPS54229
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
D-CAP2™
Surface Mount
18V
Adjustable
8-PowerSOIC (0.154", 3.90mm Width)
8-SO PowerPad
Step-Down
2A
RFQ
LT1374IFE#TRPBF
Analog Devices Inc.
IC REG BUCK SEPIC ADJ 16TSSOP
Быть в наличии3169 pcs
1
Positive
Buck, SEPIC
2.42V
21.5V
No
5V
500kHz
-
-
-
-
LT1374
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
25V
Adjustable
16-TSSOP (0.173", 4.40mm Width) Exposed Pad
16-TSSOP-EP
Step-Down
4.5A (Switch)
RFQ
TPS563219DDFT
Texas Instruments
IC REG BUCK ADJ 3A TSOT23-8
Быть в наличии23835 pcs
1
Positive
Buck
0.76V
7V
Yes
4.5V
650kHz
-
-
-
-
TPS563219
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
D-CAP2™
Surface Mount
17V
Adjustable
SOT-23-8
TSOT-23-8
Step-Down
3A
RFQ
MAX861ESA
Analog Devices Inc./Maxim Integrated
SWITCHED-CAP VOLTAGE CONVERTER
Быть в наличии15930 pcs
1
Positive or Negative
Charge Pump
-Vin, 2Vin
-
No
1.5V, 2.5V
13kHz, 100kHz, 250kHz
-
-
-
-
-
Bulk
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
5.5V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Ratiometric
50mA
RFQ
TPS54310PWP
Texas Instruments
IC REG BUCK ADJ 3A 20HTSSOP
Быть в наличии14894 pcs
1
Positive
Buck
0.891V
3.3V
Yes
3V
350kHz, 550kHz
-
-
-
-
TPS54310
Tube
-40°C ~ 125°C (TJ)
-
-
SWIFT™
Surface Mount
6V
Adjustable
20-PowerTSSOP (0.173', 4.40mm Width)
20-HTSSOP
Step-Down
3A
RFQ
MP4560DN-LF
Monolithic Power Systems Inc.
IC REG BUCK ADJUSTABLE 2A 8SOIC
Быть в наличии9880 pcs
1
Positive
Buck
0.8V
52V
No
3.8V
Up to 2MHz
-
-
-
-
-
Tube
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
55V
Adjustable
8-SOIC (0.154", 3.90mm Width) Exposed Pad
8-SOIC-EP
Step-Down
2A
RFQ
AOZ1021AI
Alpha & Omega Semiconductor Inc.
IC REG BUCK ADJUSTABLE 3A 8SOIC
Быть в наличии12140 pcs
1
Positive
Buck
0.8V
16V
Yes
4.5V
500kHz
-
-
-
-
AOZ1021
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
ICL7660AIBA
Renesas Electronics America Inc
IC REG CHARG PUMP INV 45MA 8SOIC
Быть в наличии10390 pcs
1
Positive or Negative
Charge Pump
-Vin, 2Vin
-
No
1.5V
3kHz
-
-
-
-
ICL7660A
Tube
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
12V
Fixed
8-SOIC (0.154', 3.90mm Width)
8-SOIC
Ratiometric
45mA
RFQ
MC33167D2T
onsemi
IC REG BUCK BST ADJ 5.5A D2PAK-5
Быть в наличии17690 pcs
1
Positive or Negative
Buck, Boost
5.05V
40V (Switch)
No
7.5V
72kHz
-
-
-
-
MC33167
Tube
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
40V
Adjustable
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
D2PAK-5
Step-Up, Step-Down
5.5A (Switch)
RFQ
FAN5307S18X
Fairchild Semiconductor
SWITCHING REGULATOR
Быть в наличии60580 pcs
1
Positive
Buck
1.8V
-
Yes
2.5V
1MHz
-
-
-
-
-
Bulk
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
5.5V
Fixed
SC-74A, SOT-753
SOT-23-5
Step-Down
300mA
RFQ
MPQ4558DN-LF-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJUSTABLE 1A 8SOIC
Быть в наличии21065 pcs
1
Positive
Buck
0.8V
52V
No
3.8V
Up to 2MHz
-
-
-
-
MPQ4558
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
55V
Adjustable
8-SOIC (0.154', 3.90mm Width) Exposed Pad
8-SOICE
Step-Down
1A
RFQ
MIC4723YML
Micrel Inc.
3 AMP 2MHZ INTEGRATED SWITCH BUC
Быть в наличии45424 pcs
1
Positive
Buck
1V
5.5V
No
2.7V
2MHz
-
-
-
-
-
Bulk
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
5.5V
Adjustable
12-VFDFN Exposed Pad, 12-MLF®
12-MLF™ (3x3)
Step-Down
3A
RFQ
TLV61224DCKR
Texas Instruments
IC REG BOOST 3V 160MA SC70-6
Быть в наличии75210 pcs
1
Positive
Boost
3V
-
Yes
0.7V
-
-
-
-
-
TLV61224
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
3V
Fixed
6-TSSOP, SC-88, SOT-363
SC-70-6
Step-Up
160mA (Switch)
RFQ
ST1PS01FJR
STMicroelectronics
400MA NANO-QUIESCENT SYNCHRONOUS
Быть в наличии32027 pcs
1
Positive
Buck
1.05V, 1.25V, 1.35V, 1.55V
-
Yes
1.8V
2MHz
-
-
-
-
ST1PS01
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
5.5V
Fixed
8-UFBGA, FCBGA
8-FlipChip (1.11x1.41)
Step-Down
400mA
RFQ
ISL97519AIUZ
Renesas Electronics America Inc
IC REG BOOST ADJ 1.5A 8MSOP
Быть в наличии23103 pcs
1
Positive
Boost
5V
25V
No
2.3V
620kHz, 1.25MHz
-
-
-
-
ISL97519
Tube
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
5.5V
Adjustable
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-MSOP
Step-Up
1.5A (Switch)
RFQ
S-8353A25MC-IQKT2G
ABLIC Inc.
IC REG BOOST 2.5V 300MA SOT23-5
Быть в наличии32790 pcs
1
Positive
Boost
2.5V
-
No
0.9V
50kHz
-
-
-
-
S-8353
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
10V
Fixed
SC-74A, SOT-753
SOT-23-5
Step-Up
300mA (Switch)
RFQ
TPS54329EDDAR
Texas Instruments
IC REG BUCK ADJUSTABLE 3A 8SOPWR
Быть в наличии40420 pcs
1
Positive
Buck
0.76V
7V
Yes
4.5V
650kHz
-
-
-
-
TPS54329
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
D-CAP2™, Eco-Mode™
Surface Mount
18V
Adjustable
8-PowerSOIC (0.154', 3.90mm Width)
8-SO PowerPad
Step-Down
3A
RFQ
CAT660EVA-GT3
onsemi
IC REG CHARGE PUMP INV 8SOIC
Быть в наличии14110 pcs
1
Positive or Negative
Charge Pump
-Vin, 2Vin
-
No
1.5V
10kHz, 80kHz
-
-
-
-
CAT660
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
5.5V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Ratiometric
100mA
RFQ
LM61440AANQRJRRQ1
Texas Instruments
LM61440AAN PRODUCTION MATERIAL
Быть в наличии18947 pcs
1
Positive
Buck
1V
34.2V
Yes
3V
200kHz ~ 2.2MHz
-
-
-
-
LM61440
Tape & Reel (TR)
-40°C ~ 150°C (TJ)
-
-
Automotive, AEC-Q100
Surface Mount, Wettable Flank
36V
Adjustable
14-VFQFN
14-VQFN-HR (4x3.5)
Step-Down
4A
RFQ
LTC3631IDD#PBF
Analog Devices Inc.
IC REG BUCK ADJ 100MA 8DFN
Быть в наличии5792 pcs
1
Positive or Negative
Buck
0.8V
45V
Yes
4.5V
-
-
-
-
-
LTC3631
Tube
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
45V
Adjustable
8-WFDFN Exposed Pad
8-DFN (3x3)
Step-Down
100mA
RFQ
LT3483ES6#TRPBF
Analog Devices Inc.
IC REG MULTI CONFG ADJ TSOT23-6
Быть в наличии12540 pcs
1
Negative
Buck, Boost, Charge Pump, Flyback
-2.5V
-38V
No
2.5V
-
-
-
-
-
LT3483
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
16V
Adjustable
SOT-23-6 Thin, TSOT-23-6
TSOT-23-6
Step-Up, Step-Down, Step-Up/Step-Down
170mA (Switch)
RFQ
LTC3122EMSE#PBF
Analog Devices Inc.
IC REG BOOST ADJ 2.5A 12MSOP
Быть в наличии10159 pcs
1
Positive
Boost
2.2V
15V
Yes
1.8V
1MHz
-
-
-
-
LTC3122
Tube
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
5.5V
Adjustable
12-TSSOP (0.118', 3.00mm Width) Exposed Pad
12-MSOP-EP
Step-Up
2.5A (Switch)
RFQ
LTC3638HMSE#PBF
Analog Devices Inc.
IC REG BUCK ADJ 250MA 16MSOP
Быть в наличии6037 pcs
1
Positive
Buck
0.8V
140V
No
4V
-
-
-
-
-
LTC3638
Tube
-40°C ~ 150°C (TJ)
-
-
-
Surface Mount
140V
Adjustable
16-TFSOP (0.118', 3.00mm Width), 12 Leads, Exposed Pad
16-MSOP-EP
Step-Down
250mA
RFQ
TPS62826ADMQR
Texas Instruments
2.4-V TO 5.5-V INPUT, 3-A STEP-D
Быть в наличии139070 pcs
1
Positive
Buck
0.6V
4V
Yes
2.4V
2.2MHz
-
-
-
-
TPS62826
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
5.5V
Adjustable
6-VFDFN
6-VSON-HR (1.5x1.5)
Step-Down
3A
RFQ
MP38873DL-LF-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJUSTABLE 15A 20QFN
Быть в наличии14384 pcs
1
Positive
Buck
0.8V
12V
No
4.5V
400kHz
-
-
-
-
MP38873
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
16V
Adjustable
20-PowerVFQFN
20-QFN (3x4)
Step-Down
15A
RFQ
TPS56528DDA
Texas Instruments
IC REG BUCK ADJUSTABLE 5A 8SOPWR
Быть в наличии55430 pcs
1
Positive
Buck
0.6V
7V
Yes
4.5V
650kHz
-
-
-
-
TPS56528
Tube
-40°C ~ 85°C (TA)
-
-
D-CAP2™, Eco-Mode™
Surface Mount
18V
Adjustable
8-PowerSOIC (0.154", 3.90mm Width)
8-SO PowerPad
Step-Down
5A
RFQ
TL2575-05IN
Texas Instruments
IC REG BUCK 5V 1A 16DIP
Быть в наличии28401 pcs
1
Positive
Buck
5V
-
No
4.75V
52kHz
-
-
-
-
TL2575
Tube
-40°C ~ 125°C (TJ)
-
-
-
Through Hole
40V
Fixed
16-DIP (0.300', 7.62mm)
16-PDIP
Step-Down
1A
RFQ
MPQ8632GV-15-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJUSTABLE 15A 29QFN
Быть в наличии13988 pcs
1
Positive
Buck
0.611V
13V
Yes
2.5V
200kHz ~ 1MHz
-
-
-
-
MPQ8632
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
-
Surface Mount
18V
Adjustable
29-VFQFN Exposed Pad
29-QFN (5x4)
Step-Down
15A
RFQ
AP65352SP-13
Diodes Incorporated
IC REG BUCK ADJUSTABLE 3A 8SO
Быть в наличии5640 pcs
1
Positive
Buck
0.765V
6V
Yes
4.5V
650kHz
-
-
-
-
-
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
-
Surface Mount
18V
Adjustable
8-SOIC (0.154', 3.90mm Width) Exposed Pad
8-SO-EP
Step-Down
3A
RFQ
MIC4682YM
Microchip Technology
IC REG BUCK ADJUSTABLE 2A 8SOIC
Быть в наличии9680 pcs
1
Positive
Buck
1.23V
32.3V
No
4V
200kHz
-
-
-
-
MIC4682
Tube
-40°C ~ 125°C (TJ)
-
-
SuperSwitcher™
Surface Mount
34V
Adjustable
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Down
2A
RFQ