TPS51124RGERG4
Texas Instruments
IC REG CTRLR BUCK 24QFN
Skladom7980 pcs
Enable, On Time Control, Power Good
1
-
Yes
No
-
Buck
TPS51124
Tape & Reel (TR)
Transistor Driver
D-CAP™
-40°C ~ 85°C (TA)
Surface Mount
24-VFQFN Exposed Pad
24-VQFN (4x4)
Step-Down
-
2
Positive
4.5V ~ 5.5V
RFQ
TPS40040DRBR
Texas Instruments
IC REG CTRLR BUCK 8SON
Skladom36370 pcs
Enable
1
95%
Yes
No
-
Buck
TPS40040
Tape & Reel (TR)
Transistor Driver
-
-40°C ~ 125°C (TJ)
Surface Mount
8-VDFN Exposed Pad
8-SON (3x3)
Step-Down
300kHz
1
Positive
2.25V ~ 5.5V
RFQ
LTC3855IUJ#PBF
Analog Devices Inc.
IC REG CTRLR BUCK 40QFN
Skladom4617 pcs
Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start, Tracking
2
95%
Yes
No
-
Buck
LTC3855
Tube
Transistor Driver
PolyPhase®
-40°C ~ 125°C (TJ)
Surface Mount
40-WFQFN Exposed Pad
40-QFN (6x6)
Step-Down
250kHz ~ 770kHz
2
Positive
4.5V ~ 38V
RFQ
FAN5037M
onsemi
IC REG CTRLR BUCK 8SOIC
Skladom11940 pcs
-
1
85%
No
No
-
Buck
FAN5037
Tube
Transistor Driver
-
0°C ~ 70°C (TA)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOIC
Step-Down
-
1
Positive
4.75V ~ 5.25V
RFQ
TL3845D-8
Texas Instruments
IC REG CTRLR MULT TOPOLOGY 8SOIC
Skladom98210 pcs
Frequency Control
1
48%
No
No
-
Boost, Flyback, Forward Converter
TL3845
Tube
Transistor Driver
Automotive, AEC-Q100
0°C ~ 70°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Up, Step-Up/Step-Down
100kHz
1
Positive
7.6V ~ 30V
RFQ
MIC2165YMME
Microchip Technology
IC REG CTRLR BUCK 10MSOP
Skladom20450 pcs
Enable, Power Good
1
82%
Yes
No
-
Buck
MIC2165
Tube
Transistor Driver
Hyper Speed Control®
-40°C ~ 125°C (TJ)
Surface Mount
10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
10-MSOP-EP
Step-Down
600kHz
1
Positive
4.5V ~ 28V
RFQ
ISL6525CB
Renesas Electronics America Inc
IC REG CTRLR BUCK 14SOIC
Skladom12050 pcs
Frequency Control, Phase Control, Power Good, Soft Start
1
100%
Yes
No
-
Buck
ISL6525
Tube
Transistor Driver
-
0°C ~ 70°C (TA)
Surface Mount
14-SOIC (0.154', 3.90mm Width)
14-SOIC
Step-Down
200kHz
1
Positive
10.8V ~ 13.2V
RFQ
ISL6569CBZ-T
Renesas Electronics America Inc
IC REG CTRLR BUCK 24SOIC
Skladom16840 pcs
Current Limit, Enable, Frequency Control, Power Good
2
75%
-
No
-
Buck
ISL6569
Tape & Reel (TR)
PWM Signal
-
0°C ~ 70°C (TA)
Surface Mount
24-SOIC (0.295', 7.50mm Width)
24-SOIC
Step-Down
80kHz ~ 1MHz
2
Positive
4.75V ~ 5.25V
RFQ
ISL6439AIBZ
Intersil
SINGLE SYNC BUCK PWM CONTROLLER
Skladom21550 pcs
Enable, Phase Control
1
100%
Yes
No
-
Buck
ISL6439
Tube
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
14-SOIC (0.154", 3.90mm Width)
14-SOIC
Step-Down
600kHz
1
Positive
2.97V ~ 3.63V
RFQ
LT1241CS8#PBF
Linear Technology
LT1241 - CURRENT MODE PWM CONTRO
Skladom6500 pcs
Dead Time Control, Frequency Control
1
48%
No
Yes
-
Buck
LT1241
Bulk
Transistor Driver
-
0°C ~ 100°C (TJ)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SO
Step-Down
500kHz
1
Positive, Isolation Capable
7.6V ~ 25V
RFQ
LTC3859AIFE
Analog Devices Inc.
IC POWER MANAGEMENT
Skladom13740 pcs
Enable, Frequency Control, Power Good, Soft Start, Tracking
2
99%, 100%
Yes
No
-
Buck, Buck-Boost, SEPIC
LTC3859
Tube
Transistor Driver
-
-40°C ~ 125°C (TJ)
Surface Mount
38-TFSOP (0.173", 4.40mm Width) Exposed Pad
38-TSSOP-EP
Step-Down, Step-Up/Step-Down
115kHz ~ 835kHz, 350kHz ~ 535kHz
3
Positive
4.5V ~ 38V
RFQ
LTC3774IUHE#TRPBF
Analog Devices Inc.
IC REG CTRLR BUCK 36QFN
Skladom4944 pcs
Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
2
98%
No
No
-
Buck
LTC3774
Tape & Reel (TR)
PWM Signal
PolyPhase®
-40°C ~ 125°C (TJ)
Surface Mount
36-WFQFN Exposed Pad
36-QFN (5x6)
Step-Down
150kHz ~ 1.2MHz
2
Positive
4.5V ~ 38V
RFQ
CHL8112A-08CRT
Infineon Technologies
IC REG BUCK 40VQFN
Skladom3840 pcs
Enable, Power Good
5
-
No
No
I²C, PMBus, SMBus
Buck
CHL8112
Tape & Reel (TR)
PWM
-
0°C ~ 85°C (TA)
Surface Mount
40-VFQFN Exposed Pad
PG-VQFN-40-902
Step-Down
200kHz ~ 1.2MHz
5
Positive
3.3V
RFQ
RT6541AGQW
Richtek USA Inc.
IC REG CTRLR BUCK PWM WDFN-14
Skladom85450 pcs
Current Limit, Dead Time Control, Enable, Frequency Control, Phase Control, Power Good, Soft Start
1
-
Yes
No
-
Buck
RT6541
Tape & Reel (TR)
Transistor Driver
-
-40°C ~ 125°C (TJ)
Surface Mount
14-WFDFN Exposed Pad
14-WDFN (3x2)
Step-Down
560kHz
1
Positive
3V ~ 26V
RFQ
SG5701TZ
Fairchild Semiconductor
75KHZ BICMOS, PDSO6
Skladom64500 pcs
Current Limit, Frequency Control
1
75%
No
Yes
-
Flyback
SG5701
Bulk
Transistor Driver
-
-40°C ~ 105°C
Surface Mount
SOT-23-6
SOT-23-6
Step-Up, Step-Down
70kHz
1
Positive
22V
RFQ
S-8358B53MC-NRMT2G
ABLIC Inc.
IC REG CTRLR BOOST SOT23-5
Skladom52600 pcs
Enable
1
90%
No
No
-
Boost
S-8358
Tape & Reel (TR)
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
SC-74A, SOT-753
SOT-23-5
Step-Up
100kHz
1
Positive
0.9V ~ 10V
RFQ
SMBT1415LT1
onsemi
SS SOT23 GP XSTR SPCL TR
Skladom2271750 pcs
-
-
-
-
-
-
-
SMBT1415
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
LTC3838IUHF-2#PBF
Analog Devices Inc.
IC REG CTRLR BUCK 38QFN
Skladom6126 pcs
Enable, Frequency Control, Phase Control, Power Good, Soft Start, Tracking
2
-
Yes
No
-
Buck
LTC3838
Tube
Transistor Driver
PolyPhase®
-40°C ~ 125°C (TJ)
Surface Mount
38-WFQFN Exposed Pad
38-QFN (5x7)
Step-Down
200kHz ~ 2MHz
2
Positive
4.5V ~ 38V
RFQ
LTC7803JMSE#PBF
Analog Devices Inc.
LOW IQ SYNCHRONOUS BUCK CONTROLL
Skladom12188 pcs
Enable, Frequency Control, Phase Control
1
100%
Yes
Yes
-
Buck
LTC7803
Tube
Transistor Driver
-
-40°C ~ 150°C (TJ)
Surface Mount
16-TFSOP (0.118", 3.00mm Width) Exposed Pad
16-MSOP-EP
Step-Down
100kHz ~ 3MHz
1
Positive
4.5V ~ 40V
RFQ
LM34936RHFT
Texas Instruments
30-V WIDE VIN SYNCHRONOUS 4-SWIT
Skladom8317 pcs
Current Limit, Enable, Frequency Control, Power Good, Soft Start
1
100%
Yes
Yes
-
Buck-Boost
LM34936
Tape & Reel (TR)
Transistor Driver
-
-40°C ~ 125°C (TJ)
Surface Mount
28-VFQFN Exposed Pad
28-VQFN (5x4)
Step-Up/Step-Down
100kHz ~ 600kHz
1
Positive
4.2V ~ 30V
RFQ
TFS7704H
Power Integrations
IC REG CTRLR MULT TOPOLOGY 7ESIP
Skladom7855 pcs
Enable, Reset
1
63%
No
No
-
Flyback, Forward Converter
TFS7704
Tube
Transistor Driver
HiperTFS™-2
-40°C ~ 150°C (TJ)
Through Hole
16-SSIP, 12 Leads, Exposed Pad, Formed Leads
eSIP-16F
Step-Up, Step-Down
66kHz, 132kHz
2
Positive, Isolation Capable
Up to 11.5V
RFQ
UCC2805DTR
Texas Instruments
IC REG CTRLR MULT TOPOLOGY 8SOIC
Skladom32260 pcs
Frequency Control
1
49%
No
No
-
Boost, Flyback, Forward Converter
UCC2805
Tape & Reel (TR)
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Up, Step-Up/Step-Down
31kHz
1
Positive
3.6V ~ 12V
RFQ
LT1243IS8#PBF
Analog Devices Inc.
IC REG CTRLR BUCK 8SOIC
Skladom9764 pcs
Frequency Control
1
96%
No
No
-
Buck
LT1243
Tube
Transistor Driver
-
-40°C ~ 100°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SO
Step-Down
500kHz
1
Positive, Isolation Capable
8.2V ~ 25V
RFQ
MCP1630VT-E/MS
Microchip Technology
IC REG CTRLR MULT TOPOLOGY 8MSOP
Skladom28301 pcs
-
1
-
Yes
No
-
Buck, Boost, Buck-Boost, Flyback, SEPIC
MCP1630
Tape & Reel (TR)
Transistor Driver
-
-40°C ~ 125°C (TJ)
Surface Mount
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-MSOP
Step-Up, Step-Down, Step-Up/Step-Down
-
1
Positive, Isolation Capable
3V ~ 5.5V
RFQ
TPS51513RHBR
Texas Instruments
IC REG CTRLR BUCK 32QFN
Skladom15015 pcs
Current Limit, Enable, On Time Control, Power Good
1
-
Yes
No
-
Buck
TPS51513
Tape & Reel (TR)
Transistor Driver
D-CAP+™
-10°C ~ 100°C (TA)
Surface Mount
32-VFQFN Exposed Pad
32-VQFN (5x5)
Step-Down
250kHz, 300kHz, 350kHz, 500kHz
1
Positive
3V ~ 28V
RFQ
NCP1579DR2G
onsemi
IC REG CTRLR BUCK 8SOIC
Skladom145820 pcs
Enable, Phase Control
1
75%
Yes
No
-
Buck
NCP1579
Tape & Reel (TR)
Transistor Driver
-
0°C ~ 70°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Down
275kHz
1
Positive
4.5V ~ 13.2V
RFQ
MCP19114-E/MJ
Microchip Technology
IC REG CTRLR MULT TOP I2C 24QFN
Skladom11012 pcs
-
1
-
No
No
I²C
Boost, Cuk, Flyback, SEPIC
MCP19114
Tube
Transistor Driver
Automotive, AEC-Q100
-40°C ~ 125°C (TJ)
Surface Mount
24-VFQFN Exposed Pad
24-QFN (4x4)
Step-Up, Step-Up/Step-Down
31.25kHz ~ 2MHz
1
Positive
4.5V ~ 42V
RFQ
ISL6406IB
Renesas Electronics America Inc
IC REG CTRLR BUCK 16SOIC
Skladom5280 pcs
Enable, Frequency Control, Phase Control
1
96%
Yes
Yes
-
Buck
ISL6406
Tube
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
16-SOIC (0.154', 3.90mm Width)
16-SOIC
Step-Down
100kHz ~ 715kHz
1
Positive
2.97V ~ 3.63V
RFQ
L6712QTR
STMicroelectronics
IC REG CTRLR BUCK 36VFQFPN
Skladom11604 pcs
Frequency Control, Phase Control, Power Good
2
80%
Yes
No
-
Buck
L6712
Tape & Reel (TR)
Transistor Driver
-
-40°C ~ 125°C (TJ)
Surface Mount
36-VFQFN Exposed Pad
36-VFQFPN (6x6)
Step-Down
150kHz
2
Positive
7.5V ~ 15V
RFQ
HA16116FPJ
Renesas Electronics America Inc
SWITCHING CONTROLLER
Skladom25595 pcs
-
-
-
-
-
-
-
HA16116
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
LTC3828EG#TRPBF
Analog Devices Inc.
IC REG CTRLR BUCK 28SSOP
Skladom5129 pcs
Enable, Phase Control, Power Good, Tracking
2
99.4%
Yes
No
-
Buck
LTC3828
Tape & Reel (TR)
Transistor Driver
PolyPhase®
-40°C ~ 85°C (TA)
Surface Mount
28-SSOP (0.209", 5.30mm Width)
28-SSOP
Step-Down
260kHz ~ 550kHz
2
Positive
4.5V ~ 28V
RFQ
ISL6398IRTZ
Renesas Electronics America Inc
IC REG CTRLR BUCK PMBUS 40QFN
Skladom15260 pcs
-
6
98%
No
-
I²C, PMBus, SMBus
Buck
ISL6398
Tube
PWM Signal
-
-40°C ~ 85°C (TA)
Surface Mount
40-VFQFN Exposed Pad
40-TQFN (5x5)
Step-Down
120kHz ~ 2.025MHz
6
Positive
4.75V ~ 5.25V
RFQ
TPS51217DSCT
Texas Instruments
IC REG CTRLR BUCK 10WSON
Skladom12609 pcs
Enable, Power Good
1
-
Yes
No
-
Buck
TPS51217
Tape & Reel (TR)
Transistor Driver
D-CAP™
-40°C ~ 85°C (TA)
Surface Mount
10-WFDFN Exposed Pad
10-WSON (3x3)
Step-Down
340kHz
1
Positive
4.5V ~ 6.5V
RFQ
LTC3835EUFD#PBF
Analog Devices Inc.
IC REG CTRLR BUCK 20QFN
Skladom5765 pcs
Enable, Phase Control, Power Good, Soft Start, Tracking
1
99.4%
Yes
No
-
Buck
LTC3835
Tube
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
20-WFQFN Exposed Pad
20-QFN (4x5)
Step-Down
250kHz ~ 530kHz
1
Positive
4V ~ 36V
RFQ
UC3845N
Texas Instruments
IC REG CTRLR MULT TOPOLOGY 8DIP
Skladom42520 pcs
Frequency Control
1
48%
No
No
-
Boost, Buck, Buck-Boost, Flyback, Forward
UC3845
Tube
Transistor Driver
-
0°C ~ 70°C (TA)
Through Hole
8-DIP (0.300", 7.62mm)
8-PDIP
Step-Up, Step-Down, Step-Up/Step-Down
Up to 500kHz
1
Positive, Isolation Capable
12V ~ 28V
RFQ
ISL6526IRZ
Intersil
SWITCHING CONTROLLER, VOLTAGE-MO
Skladom15687 pcs
Enable, Phase Control
1
100%
Yes
No
-
Buck
ISL6526
Bulk
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
16-VQFN Exposed Pad
16-QFN (5x5)
Step-Down
600kHz
1
Positive
2.97V ~ 3.63V
RFQ
LTC1702CGN#PBF
Analog Devices Inc.
IC REG CTRLR BUCK 24SSOP
Skladom3968 pcs
Current Limit, Enable, Power Good, Soft Start
2
90%
Yes
No
-
Buck
LTC1702
Tube
Transistor Driver
-
0°C ~ 70°C (TA)
Surface Mount
24-SSOP (0.154', 3.90mm Width)
24-SSOP
Step-Down
550kHz
2
Positive
3V ~ 7V
RFQ
ISL9500CVZ
Renesas Electronics America Inc
IC REG CTRLR BUCK 38TSSOP
Skladom13310 pcs
Enable, Frequency Control, Phase Control, Power Good
2
-
Yes
No
-
Buck
ISL9500
Tube
Transistor Driver
-
-10°C ~ 85°C (TA)
Surface Mount
38-TFSOP (0.173", 4.40mm Width)
38-TSSOP
Step-Down
250kHz ~ 1MHz
2
Positive
4.75V ~ 5.25V
RFQ
LTC3892EUH-2#PBF
Analog Devices Inc.
IC REG CTRLR BUCK 32QFN
Skladom5251 pcs
Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
2
99%
Yes
No
-
Buck
LTC3892
Tube
Transistor Driver
-
-40°C ~ 125°C (TJ)
Surface Mount
32-WFQFN Exposed Pad
32-QFN (5x5)
Step-Down
105kHz ~ 835kHz, 350kHz ~ 535kHz
2
Positive
4.5V ~ 60V
RFQ
UC3856N
Texas Instruments
IC REG CTRLR MULT TOPOLOGY 16DIP
Skladom12409 pcs
Enable, Frequency Control, Soft Start
1
47%
Yes
Yes
-
Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
UC3856
Tube
Transistor Driver
-
0°C ~ 70°C (TA)
Through Hole
16-DIP (0.300', 7.62mm)
16-PDIP
Step-Up, Step-Down, Step-Up/Step-Down
200kHz
2
Positive
7V ~ 40V
RFQ
MAX8743ETX
Analog Devices Inc./Maxim Integrated
DUAL STEP-DOWN CONTROLLER
Skladom45588 pcs
Current Limit, Enable, On Time Control, Power Good, Pulse Skipping
1
-
Yes
No
-
Buck
MAX8743
Bulk
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
36-WFQFN Exposed Pad
36-TQFN (6x6)
Step-Down
200kHz, 300kHz, 420kHz, 540kHz
2
Positive
2V ~ 28V
RFQ
ISL6522IB
Renesas Electronics America Inc
IC REG CTRLR BUCK 14SOIC
Skladom5150 pcs
Enable, Frequency Control, Phase Control, Soft Start
1
100%
Yes
No
-
Buck
ISL6522
Tube
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
14-SOIC (0.154', 3.90mm Width)
14-SOIC
Step-Down
200kHz
1
Positive
10.8V ~ 13.2V
RFQ
ISL68200IRZ
Renesas Electronics America Inc
IC REG CTRLR BUCK PMBUS 24QFN
Skladom8595 pcs
Enable, Phase Control, Power Good
1
-
Yes
No
I²C, PMBus, SMBus
Buck
ISL68200
Tube
Transistor Driver
Rapid Robust Ripple Regulator™ (R4)
-40°C ~ 85°C (TA)
Surface Mount
24-VFQFN Exposed Pad
24-QFN (4x4)
Step-Down
300kHz ~ 1.5MHz
1
Positive
4.5V ~ 24V
RFQ
TL2843BD-8
Texas Instruments
IC REG CTRLR MULT TOPOLOGY 8SOIC
Skladom80780 pcs
Frequency Control
1
96%
No
No
-
Boost, Flyback, Forward
TL2843
Tube
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Up, Step-Up/Step-Down
Up to 500kHz
1
Positive
7.6V ~ 30V
RFQ
A7987TR
STMicroelectronics
61 V 3A ASYNCHRONOUS STEP-DOWN S
Skladom9067 pcs
Current Limit, Enable, Frequency Control, Power Good, Soft Start
1
100%
Yes
Yes
-
Buck-Boost
A7987
Tape & Reel (TR)
Transistor Driver
Automotive, AEC-Q100
-40°C ~ 150°C (TJ)
Surface Mount
16-PowerTSSOP (0.173", 4.40mm Width)
16-HTSSOP
Step-Down
250kHz ~ 1.5MHz
1
Positive
4.5V ~ 61V
RFQ
UC3843BD1R2G
onsemi
IC REG CTRLR FLYBACK 8SOIC
Skladom117480 pcs
Frequency Control
1
96%
No
No
-
Boost, Flyback
UC3843
Tape & Reel (TR)
Transistor Driver
-
0°C ~ 70°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Up, Step-Up/Step-Down
Up to 500kHz
1
Positive, Isolation Capable
7.6V ~ 30V
RFQ
MIC38C43XYM
Microchip Technology
IC REG CTRLR MULT TOPOLOGY 8SOIC
Skladom25545 pcs
Frequency Control
1
96%
Yes
No
-
Buck, Boost, Flyback, Forward Converter
MIC38C43
Tube
Transistor Driver
-
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOIC
Step-Up, Step-Down, Step-Up/Step-Down
500kHz
1
Positive, Isolation Capable
7.6V ~ 20V
RFQ
ISL6843IU
Renesas Electronics America Inc
IC REG CTRLR BOOST/FLYBACK 8MSOP
Skladom10380 pcs
Current Limit, Frequency Control
1
96%
Yes
No
-
Boost, Flyback
ISL6843
Tube
Transistor Driver
-
-40°C ~ 105°C (TA)
Surface Mount
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
8-MSOP
Step-Up, Step-Up/Step-Down
Up to 2MHz
1
Positive, Isolation Capable
9V ~ 16V
RFQ
HIP6311ACB-T
Renesas Electronics America Inc
IC REG CTRLR BUCK 20SOIC
Skladom16420 pcs
Enable, Frequency Control, Power Good
4
-
-
No
-
Buck
HIP6311
Tape & Reel (TR)
PWM Signal
-
0°C ~ 70°C (TA)
Surface Mount
20-SOIC (0.295', 7.50mm Width)
20-SOIC
Step-Down
50kHz ~ 1.5MHz
4
Positive
4.75V ~ 5.25V
RFQ
ISL8105CRZ
Renesas Electronics America Inc
IC REG CTRLR BUCK 10DFN
Skladom5220 pcs
Current Limit, Enable
1
100%
Yes
No
-
Buck
ISL8105
Tube
Transistor Driver
-
0°C ~ 70°C (TA)
Surface Mount
10-VFDFN Exposed Pad
10-DFN (3x3)
Step-Down
300kHz
1
Positive
6.5V ~ 14.4V
RFQ