LTC3411EDD#PBF
Analog Devices Inc.
IC REG BUCK BST ADJ 1.25A 10DFN
स्टॉक में7358 pcs
1
Positive
Buck, Buck-Boost
0.8V
5V
No
2.625V
1MHz
-
-
-
-
-
LTC3411
Tube
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Adjustable
10-WFDFN Exposed Pad
10-DFN (3x3)
Step-Down, Step-Up/Step-Down
1.25A
RFQ
MAX17243ETPA+
Analog Devices Inc./Maxim Integrated
IC REG BUCK ADJ/3.3V 3A 20TQFN
स्टॉक में9380 pcs
1
Positive
Buck
1V (3.3V)
10V
Yes
3.5V
220kHz ~ 2.2MHz
-
-
-
-
-
MAX17243
Strip
-40°C ~ 85°C
-
-
Surface Mount
36V
Adjustable (Fixed)
20-WQFN Exposed Pad
20-TQFN (5x5)
Step-Down
3A
RFQ
R1210N341C-TR-FE
Nisshinbo Micro Devices Inc.
8V INPUT PWM STEP-UP DCDC CONVER
स्टॉक में48990 pcs
1
Positive
Boost
-
3.4V
No
-
100kHz
-
-
-
-
-
R1210
Tape & Reel (TR)
-40°C ~ 85°C
-
R1210Nxx1x
Surface Mount
8V
Fixed
SC-74A, SOT-753
SOT-23-5
Step-Up
400mA
RFQ
LT1938IDD#PBF
Analog Devices Inc.
IC REG BUCK ADJ 2.2A 10DFN
स्टॉक में4678 pcs
1
Positive
Buck
1.265V
20V
No
3.6V
300kHz ~ 3MHz
-
-
-
-
-
LT1938
Tube
-40°C ~ 125°C (TJ)
-
-
Surface Mount
25V
Adjustable
10-WFDFN Exposed Pad
10-DFN (3x3)
Step-Down
2.2A
RFQ
MAX1720EUT
Analog Devices Inc./Maxim Integrated
IC REG CHARG PUMP INV 25MA SOT23
स्टॉक में12100 pcs
1
Positive or Negative
Charge Pump
-Vin, 2Vin
-
No
1.5V
6kHz ~ 21kHz
-
-
-
-
-
MAX172
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Fixed
SOT-23-6
SOT-23-6
Ratiometric
25mA
RFQ
LT8301ES5#TRMPBF
Analog Devices Inc.
IC REG FLYBACK 1.2A TSOT23-5
स्टॉक में6280 pcs
1
Positive or Negative, Isolation Capable
Flyback
-
-
No
2.7V
Down to 10kHz
-
-
-
-
-
LT8301
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
42V
-
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
Step-Up/Step-Down
1.2A
RFQ
XC9236A31CMR-G
Torex Semiconductor Ltd
600MA SYNCHRONOUS STEP-DOWN DCDC
स्टॉक में52260 pcs
1
Positive
Buck
3.1V
-
Yes
2V
1.2MHz
-
-
-
-
-
XC9236
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
XC9236
Surface Mount
6V
Fixed
SC-74A, SOT-753
SOT-25
Step-Down
600mA
RFQ
MP1477HGTF-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJUSTABLE 3A SOT563
स्टॉक में54820 pcs
1
Positive
Buck
0.8V
10V
Yes
4.2V
1.2MHz
-
-
-
-
-
MP1477
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
17V
Adjustable
SOT-563, SOT-666
SOT-563
Step-Down
3A
RFQ
TPS54525PWP
Texas Instruments
IC REG BUCK ADJ 5.5A 14HTSSOP
स्टॉक में21309 pcs
1
Positive
Buck
0.76V
5.5V
Yes
4.5V
650kHz
-
-
-
-
-
TPS54525
Tube
-40°C ~ 85°C (TA)
-
D-CAP2™
Surface Mount
18V
Adjustable
14-PowerTSSOP (0.173', 4.40mm Width)
14-HTSSOP
Step-Down
5.5A
RFQ
LM2576S-12
UMW
IC REG BUCK 3A TO263-5L
स्टॉक में23316 pcs
1
Positive
Buck
-
12V
Yes
-
52kHz
-
-
-
-
-
-
Tape & Reel (TR)
-40°C ~ 125°C (TA)
-
LM2576
Surface Mount
40V
Fixed
TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
TO-263-5L
Step-Down
3A
RFQ
MAX639CSA+T
Analog Devices Inc./Maxim Integrated
IC REG BUCK ADJ/5V 225MA 8SOIC
स्टॉक में8937 pcs
1
Positive
Buck
1.3V (5V)
11.5V
No
4V
-
-
-
-
-
-
MAX639
Tape & Reel (TR)
0°C ~ 70°C (TA)
-
-
Surface Mount
11.5V
Adjustable (Fixed)
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Down
225mA
RFQ
LT1374CFE#PBF
Analog Devices Inc.
IC REG BUCK SEPIC ADJ 16TSSOP
स्टॉक में3281 pcs
1
Positive
Buck, SEPIC
2.42V
21.5V
No
5V
500kHz
-
-
-
-
-
LT1374
Tube
0°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
AP1601M10G-13
Diodes Incorporated
IC REG BOOST ADJ 1.5A 10MSOP
स्टॉक में15770 pcs
1
Positive
Boost
2V
5.5V
No
1.1V
100kHz
-
-
-
-
-
AP1601
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Adjustable
10-TFSOP, 10-MSOP (0.118', 3.00mm Width)
10-MSOP
Step-Up
1.5A (Switch)
RFQ
MAX662ACSA
Analog Devices Inc./Maxim Integrated
IC REG CHARG PUMP 12V 30MA 8SOIC
स्टॉक में10390 pcs
1
Positive
Charge Pump
12V
-
No
4.5V
500kHz
-
-
-
-
-
MAX662
Tube
0°C ~ 70°C (TA)
-
-
Surface Mount
5.5V
Fixed
8-SOIC (0.154', 3.90mm Width)
8-SOIC
Step-Up
30mA
RFQ
MAX1947ETA25+T
Analog Devices Inc./Maxim Integrated
IC REG BOOST 2.5V 214MA 8TDFN
स्टॉक में15340 pcs
1
Positive
Boost
2.5V
-
Yes
0.7V
Up to 2MHz
-
-
-
-
-
MAX1947
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
3.6V
Fixed
8-WDFN Exposed Pad
8-TDFN (3x3)
Step-Up
214mA
RFQ
MP2357DT-LF-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJ 500MA SOT23-6
स्टॉक में41123 pcs
1
Positive
Buck
0.81V
15V
No
4.5V
1.4MHz
-
-
-
-
-
MP2357
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
24V
Adjustable
SOT-23-6
SOT-23-6
Step-Down
500mA
RFQ
TPS61240TDRVRQ1
Texas Instruments
IC REG BOOST 5V 500MA 6WSON
स्टॉक में37248 pcs
1
Positive
Boost
5V
-
Yes
2.3V
3.5MHz
-
-
-
-
-
TPS61240
Tape & Reel (TR)
-40°C ~ 105°C (TA)
-
Automotive, AEC-Q100
Surface Mount
5.5V
Fixed
6-WDFN Exposed Pad
6-WSON (2x2)
Step-Up
500mA (Switch)
RFQ
LM5001SD
Texas Instruments
IC REG MULTI CONFG ADJ 8WSON
स्टॉक में7800 pcs
1
Positive, Isolation Capable
Boost, Flyback, Forward Converter, SEPIC
3.1V
76V (Switch)
No
3.1V
50kHz ~ 1.5MHz
-
-
-
-
-
LM5001
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
75V
Adjustable
8-WDFN Exposed Pad
8-WSON (4x4)
Step-Up, Step-Up/Step-Down
800mA (Switch)
RFQ
LT1936HMS8E
Linear Technology
LT1936 - 1.4A, 500KHZ STEP-DOWN
स्टॉक में13840 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
-
*
-
-
-
-
-
-
-
RFQ
TPS62363YZHR
Texas Instruments
IC REG BCK ADJ/PROG 2.5A 16DSBGA
स्टॉक में43613 pcs
1
Positive
Buck
0.5V (1V, 1.2V, 1.36V, 1.5V)
1.77V
Yes
2.5V
2.5MHz
-
-
-
-
-
TPS62363
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
DCS-Control™
Surface Mount
5.5V
Adjustable (Programmable)
16-UFBGA, DSBGA
16-DSBGA (2.24x2.16)
Step-Down
2.5A
RFQ
BD9322EFJ
LAPIS Semiconductor
IC REG BUCK ADJ 2A SYNC 8HTSOP
स्टॉक में15880 pcs
1
Positive
Buck
0.9V
16.2V
Yes
4.75V
380kHz
Digi-Reel®
BD932*
Lead free / RoHS Compliant
1 (Unlimited)
BD9322EFJDKR
-
-
-40°C ~ 85°C (TA)
Buck Switching Regulator IC Positive Adjustable 0.9V 1 Output 2A 8-SOIC (0.154", 3.90mm Width) Exposed Pad
-
Surface Mount
18V
Adjustable
8-SOIC (0.154", 3.90mm Width) Exposed Pad
8-HTSOP-J
Step-Down
2A
RFQ
LM2775DSGR
Texas Instruments
IC REG CHARG PUMP 5V 200MA 8WSON
स्टॉक में39800 pcs
1
Positive
Charge Pump
5V
-
No
2.7V
2MHz
-
-
-
-
-
LM2775
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Fixed
8-WFDFN Exposed Pad
8-WSON (2x2)
Step-Up
200mA
RFQ
LT3501IFE#PBF
Analog Devices Inc.
IC REG BUCK ADJ 3A DL 20TSSOP
स्टॉक में5675 pcs
2
Positive
Buck
0.8V
23.75V
No
3.1V
250kHz ~ 1.5MHz
-
-
-
-
-
LT3501
Tube
-40°C ~ 125°C (TJ)
-
-
Surface Mount
25V
Adjustable
20-TSSOP (0.173", 4.40mm Width) Exposed Pad
20-TSSOP-EP
Step-Down
3A
RFQ
MPQ2143DJ-AEC1-LF-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJ 3A TSOT23-8
स्टॉक में27484 pcs
1
Positive
Buck
0.6V
5V
Yes
2.5V
1.2MHz
-
-
-
-
-
MPQ2143
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
Automotive, AEC-Q100
Surface Mount
5.5V
Adjustable
SOT-23-8 Thin, TSOT-23-8
TSOT-23-8
Step-Down
3A
RFQ
TPS61288LRQQR
Texas Instruments
IC REG BOOST ADJ 11VQFN
स्टॉक में32170 pcs
1
Positive
Boost
4.5V
18V
Yes
2V
500kHz
-
-
-
-
-
-
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
18V
Adjustable
11-VFQFN
11-VQFN-HR (2.5x3)
Step-Up
-
RFQ
LTC3633EUFD#PBF
Analog Devices Inc.
IC REG BUCK ADJ 3A DL 28QFN
स्टॉक में5153 pcs
2
Positive
Buck
0.6V
14.7V
Yes
3.6V
500kHz ~ 4MHz
-
-
-
-
-
LTC3633
Tube
-40°C ~ 125°C (TJ)
-
-
Surface Mount
15V
Adjustable
28-WFQFN Exposed Pad
28-QFN (4x5)
Step-Down
3A
RFQ
RT8009-18GJ5
Richtek USA Inc.
IC REG BUCK 1.8V 600MA TSOT23-5
स्टॉक में8450 pcs
1
Positive
Buck
1.8V
-
Yes
2.5V
1.25MHz
-
-
-
-
-
RT8009
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
Step-Down
600mA
RFQ
SP6650EU-L
MaxLinear, Inc.
IC REG BUCK ADJ/3.3V 0.6A 10MSOP
स्टॉक में14940 pcs
1
Positive
Buck
1.25V (3.3V)
6.5V
Yes
2.7V
-
-
-
-
-
-
-
Tube
-40°C ~ 85°C (TA)
-
-
Surface Mount
6.5V
Adjustable (Fixed)
10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
10-MSOP
Step-Down
600mA
RFQ
MAX17224ELT+T
Analog Devices Inc./Maxim Integrated
IC REG BOOST ADJUSTABLE 1A 6UDFN
स्टॉक में10442 pcs
1
Positive
Boost
1.8V
5V
Yes
0.4V
2.5MHz
-
-
-
-
-
MAX17224
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Adjustable
6-WDFN
6-µDFN (2x2)
Step-Up
1A (Switch)
RFQ
AP3211KTR-G1
Diodes Incorporated
IC REG BUCK ADJ 1.5A SOT23-6
स्टॉक में169390 pcs
1
Positive
Buck
0.81V
15V
No
4.5V
1.4MHz
-
-
-
-
-
AP3211
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
18V
Adjustable
SOT-23-6
SOT-23-6
Step-Down
1.5A
RFQ
LM2599SX-ADJ
Texas Instruments
IC REG BUCK ADJ 3A TO263-7
स्टॉक में6490 pcs
1
Positive
Buck
1.23V
37V
No
4.5V
150kHz
-
-
-
-
-
LM2599
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
SIMPLE SWITCHER®
Surface Mount
40V
Adjustable
TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
DDPAK/TO-263-7
Step-Down
3A
RFQ
R1243S001A-E2-FE
Nisshinbo Micro Devices Inc.
2A 30V INPUT PWM STEP-DOWN DCDC
स्टॉक में20962 pcs
1
Positive
Buck
0.8V
18V
No
4.5V
1MHz
-
-
-
-
-
R1243
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
R1243x
Surface Mount
30V
Adjustable
8-SOIC (0.173", 4.40mm Width) Exposed Pad
8-HSOP-E
Step-Down
2A
RFQ
MAX1724EZK30-T
Analog Devices Inc./Maxim Integrated
IC REG BOOST 3V 400MA TSOT23-5
स्टॉक में9630 pcs
1
Positive
Boost
3V
-
Yes
0.8V
-
-
-
-
-
-
MAX1724
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Fixed
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
Step-Up
400mA (Switch)
RFQ
TPS628681ARQYR
Texas Instruments
5.5-V 4-A SYNCHRONOUS STEP-DOWN
स्टॉक में42394 pcs
1
Positive
Buck
0.4V
1.675V
Yes
2.4V
2.4MHz
-
-
-
-
-
-
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
5.5V
Programmable
9-VFQFN
9-VQFN-HR (1.5x2.5)
Step-Down
4A
RFQ
TLV62568ADRLT
Texas Instruments
IC REG BUCK ADJUSTABLE 1A SOT563
स्टॉक में48710 pcs
1
Positive
Buck
0.6V
5.5V
Yes
2.5V
1.5MHz
-
-
-
-
-
TLV62568
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
5.5V
Adjustable
SOT-563, SOT-666
SOT-5X3
Step-Down
1A
RFQ
MP2307DN-LF-Z
Monolithic Power Systems Inc.
IC REG BUCK ADJUSTABLE 3A 8SOIC
स्टॉक में13333 pcs
1
Positive
Buck
0.925V
20V
Yes
4.75V
340kHz
-
-
-
-
-
MP2307
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
23V
Adjustable
8-SOIC (0.154', 3.90mm Width) Exposed Pad
8-SOIC-EP
Step-Down
3A
RFQ
MAX1734EUK15+
Analog Devices Inc./Maxim Integrated
IC REG BUCK 1.5V 250MA SOT23-5
स्टॉक में23335 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX173
Strip
-
-
*
-
-
-
-
-
-
-
RFQ
LT3510IFE
Analog Devices Inc.
IC REG BUCK ADJ 2A DL 20TSSOP
स्टॉक में3930 pcs
2
Positive
Buck
0.8V
23.75V
No
3.1V
250kHz ~ 1.5MHz
-
-
-
-
-
-
Tube
-40°C ~ 125°C (TJ)
-
-
Surface Mount
25V
Adjustable
20-TSSOP (0.173", 4.40mm Width) Exposed Pad
20-TSSOP-EP
Step-Down
2A
RFQ
ADP1111ARZ
Analog Devices Inc.
IC REG BUCK BST ADJ 400MA 8SOIC
स्टॉक में9560 pcs
1
Positive or Negative
Buck, Boost
1.2V
30V
No
2V
72kHz
-
-
-
-
-
ADP1111
Tube
0°C ~ 70°C (TA)
-
-
Surface Mount
30V
Adjustable
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Up, Step-Down
400mA (Switch)
RFQ
LT1374CS8#TRPBF
Analog Devices Inc.
IC REG BUCK SEPIC ADJ 4.5A 8SOIC
स्टॉक में3443 pcs
1
Positive
Buck, SEPIC
2.42V
21.5V
No
5V
500kHz
-
-
-
-
-
LT1374
Tape & Reel (TR)
0°C ~ 125°C (TJ)
-
-
Surface Mount
25V
Adjustable
8-SOIC (0.154', 3.90mm Width)
8-SO
Step-Down
4.5A (Switch)
RFQ
LT8612EUDE#TRPBF
Analog Devices Inc.
IC REG BUCK ADJUSTABLE 6A 28QFN
स्टॉक में5225 pcs
1
Positive
Buck
0.97V
41.6V
Yes
3.4V
200kHz ~ 2.2MHz
-
-
-
-
-
LT8612
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
-
Surface Mount
42V
Adjustable
28-WFQFN Exposed Pad
28-QFN (3x6)
Step-Down
6A
RFQ
LM2677T-5.0
Texas Instruments
IC REG BUCK 5V 5A TO220-7
स्टॉक में6150 pcs
1
Positive
Buck
5V
-
No
8V
260kHz
-
-
-
-
-
LM2677
Tube
-40°C ~ 125°C (TJ)
-
SIMPLE SWITCHER®
Through Hole
40V
Fixed
TO-220-7 Formed Leads
TO-220-7
Step-Down
5A
RFQ
TPS54232D
Texas Instruments
IC REG BUCK ADJUSTABLE 2A 8SOIC
स्टॉक में31712 pcs
1
Positive
Buck
0.8V
25V
No
3.5V
1MHz
-
-
-
-
-
TPS54232
Tube
-40°C ~ 150°C (TJ)
-
Eco-Mode™
Surface Mount
28V
Adjustable
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Down
2A
RFQ
TPS63060MDSCTEP
Texas Instruments
IC REG BCK BST ADJ 2A 10WSON
स्टॉक में3689 pcs
1
Positive
Buck-Boost
2.5V
8V
Yes
2.5V
2.4MHz
-
-
-
-
-
TPS63060
Tape & Reel (TR)
-55°C ~ 125°C (TJ)
-
-
Surface Mount
12V
Adjustable
10-WFDFN Exposed Pad
10-WSON (3x3)
Step-Up/Step-Down
2A (Switch)
RFQ
ISL78235ARZ
Renesas Electronics America Inc
IC REG BUCK ADJUSTABLE 5A 16TQFN
स्टॉक में9210 pcs
1
Positive
Buck
0.6V
5.5V
Yes
2.7V
420kHz ~ 4.2MHz
-
-
-
-
-
ISL78235
Tube
-40°C ~ 105°C (TA)
-
Automotive, AEC-Q100
Surface Mount
5.5V
Adjustable
16-WFQFN Exposed Pad
16-TQFN (3x3)
Step-Down
5A
RFQ
TPS562219ADDFR
Texas Instruments
IC REG BUCK ADJ 2A TSOT23-8
स्टॉक में77470 pcs
1
Positive
Buck
0.76V
7V
Yes
4.5V
650kHz
-
-
-
-
-
TPS562219
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
D-CAP2™
Surface Mount
17V
Adjustable
SOT-23-8
TSOT-23-8
Step-Down
2A
RFQ
NCP1400ASN33T1
onsemi
IC REG BOOST 3.3V 100MA 5TSOP
स्टॉक में10440 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
LM2594HVMX-3.3
Texas Instruments
IC REG BUCK 3.3V 500MA 8SOIC
स्टॉक में12680 pcs
1
Positive
Buck
3.3V
-
No
4.5V
150kHz
-
-
-
-
-
LM2594
Tape & Reel (TR)
-40°C ~ 125°C (TJ)
-
SIMPLE SWITCHER®
Surface Mount
60V
Fixed
8-SOIC (0.154', 3.90mm Width)
8-SOIC
Step-Down
500mA
RFQ
MAX1680ESA+
Analog Devices Inc./Maxim Integrated
IC REG CHARGE PUMP INV 8SOIC
स्टॉक में7856 pcs
1
Positive or Negative
Charge Pump
-Vin, 2Vin
-
No
2V
125kHz, 250kHz
-
-
-
-
-
MAX1680
Tube
-40°C ~ 85°C (TA)
-
-
Surface Mount
5.5V
Fixed
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Ratiometric
125mA
RFQ
AZ34063UMTR-G1
Diodes Incorporated
IC REG BUCK BST ADJ 1.5A 8SOIC
स्टॉक में315490 pcs
1
Positive or Negative
Buck, Boost
1.25V
36V
No
3V
Up to 180kHz
-
-
-
-
-
AZ34063
Tape & Reel (TR)
-40°C ~ 85°C (TA)
-
-
Surface Mount
36V
Adjustable
8-SOIC (0.154", 3.90mm Width)
8-SOIC
Step-Up, Step-Down
1.5A (Switch)
RFQ