Step-Down (Buck) Regulators

Step-down regulators, also known as buck regulators, are used to lower the input voltage to the desired output level with higher efficiency than an LDO. A step-down regulator integrates power FET ICs, providing a monolithic power converter.


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3A 18V PFM/PWM Step-Down Regulator
1
3
4.5
18
1200
0.925
16
340
2.0
95
HSOIC-8
-
Current Mode PWM
Light Load PFM, Enable, Over Current Protection, Thermal Shutdown, Soft Start Adjustable
-40 to 85
3A 18V Synchronous Step-Down Converter
1
3
4.5
18
1000
0.925
16
340
2.0
93
HSOIC-8
-
Current Mode PWM
Enable, Over Current Protection, Thermal Shutdown, Soft Start Adjustable
-40 to 85
2A 18V Synchronous Step-Down Converter
1
2
4.5
18
1000
0.925
16
340
2.0
95
SOIC-8
-
Current Mode PWM
Enable, Over Current Protection, Thermal Shutdown, Soft Start Adjustable
-40 to 85
12A 300kHz Step-Down Regulator
1
12
3
22
1500
0.8
20.2
300
1.0
93
DFN-26
7x4
Voltage Mode PWM
Enable, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO Adjustable, Built-in 3.3/5V LDO, Soft Start Adjustable, Adjustable Current Limit
-40 to 125
1.5A Non Synchronous Step-Down Regulator
1
1.5
4.5
18
800
0.81
15
1400
3.0
92
SOT23-6
-
Current Mode PWM
Enable, Over Current Protection, Thermal Shutdown, Soft Start Built-in, Internal Compensation
-40 to 85
3A Synchronous Step-Down Regulator
1
3
2.6
5.5
460
0.8
5
300-2500
<2.0
95
DFN-10
-
Current Mode PWM
Enable, Over Current Protection, Power Good, Synchronous Rectification, Thermal Shutdown, UVLO, Soft Start Built-in, 100% Duty Cycle
-40 to 125
Dual Channel Step-Down Regulator
2
1
2.5
5.5
30
0.6
5
1500
<3.0
97
SOIC-8
-
Current Mode PWM
Light Load PFM, Enable, Over Current Protection, Synchronous Rectification, Thermal Shutdown, UVLO, 100% Duty Cycle
-40 to 85
1A Synchronous Step-Down Regulator
1
1
2.5
5.5
15
0.6
5
1500
<3.0
97
SOT23-5, DFN-6
-
Current Mode PWM
Light Load PFM, Enable, Over Current Protection, Synchronous Rectification, Thermal Shutdown, UVLO, 100% Duty Cycle
-40 to 85
1.5A Synchronous Step-Down Converter
1
1.5
2.5
5.5
240
0.6
5
1300
<2.5
95
DFN-6
-
Current Mode PWM
Light Load PFM, Enable, Over Current Protection, Synchronous Rectification, Thermal Shutdown, Soft Start Built-in, Internal Compensation, 100% Duty Cycle
-40 to 85
Universal PMIC 3 Output Buck Regulator
3
2
4.5
14
2800
0.8
6
1000
<1.0
93
TQFN-32
-
Current Mode PWM
Light Load PFM, Enable, Over Current Protection, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Phase Interleaving, Clock Sync, Soft Start Built-in
-40 to 125
Universal PMIC 3 Output Buck Regulator
3
2
4.5
14
2600
0.8
6
500
<1.0
93
TQFN-32
-
Current Mode PWM
Light Load PFM, Enable, Over Current Protection, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Phase Interleaving, Clock Sync, Soft Start Built-in
-40 to 125
AEC-Q100 Qualified 40V, 8A Synchronous Step-Down COT Regulator
1
8
5.5
40
700
0.6
30
100-800
0.5
96
QFN-30 5x5
5x5
Proprietary emulated current mode COT
AEC-Q100 Qualification, Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
8A 40V Synchronous Step-Down COT Regulator
1
8
3
40
700
0.6
30
100-800
0.5
96
QFN-30
5x5
Proprietary emulated current mode COT
Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 3.3/5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
AEC-Q100 Qualified 40V, 5A Synchronous Step-Down COT Regulator
1
5
5.5
40
700
0.6
30
100-800
0.5
96
QFN-30 5x5
5x5
Proprietary emulated current mode COT
AEC-Q100 Qualification, Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
5A 40V Synchronous Step-Down COT Regulator
1
5
3
40
700
0.6
30
100-800
0.5
96
QFN-30 5x5
5x5
Proprietary emulated current mode COT
Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
AEC-Q100 Qualified 40V, 3A Synchronous Step-Down COT Regulator
1
3
5.5
40
700
0.6
30
100-800
0.5
96
QFN-30 5x5
5x5
Proprietary emulated current mode COT
AEC-Q100 Qualification, Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
3A 40V Synchronous Step-Down COT Regulator
1
3
3
40
700
0.6
30
100-800
0.5
95
QFN-30 5x5
5x5
Proprietary emulated current mode COT
Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 3.3/5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
1.5A 40V Synchronous Step Down COT Regulator
1
1.5
3
40
700
0.6
30
400-800
0.5
95
QFN30 5x5
5x5
Proprietary emulated current mode COT
Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 3.3/5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
20A, 22V Synchronous Step-Down COT Regulator
1
20
4.5
22
800
0.6
18
200-1000
0.5
97
QFN-17
5x6
Proprietary emulated current mode COT
Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 3.3/5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
15A, 22V Synchronous Step-Down COT Regulator
1
15
4.5
22
800
0.6
18
200-1000
0.5
97
QFN-17
5x6
Proprietary emulated current mode COT
Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 3.3/5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
15A Synchronous Step-Down COT Regulator
1
15
3
22
700
0.6
18
200-800
0.5
96
QFN-30
6x6
Proprietary emulated current mode COT
Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 3.3/5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
12A Synchronous Step-Down COT Regulator
1
12
3
22
700
0.6
18
200-800
0.5
96
QFN-30
5x5
Proprietary emulated current mode COT
Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 3.3/5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
8A Synchronous Step-Down COT Regulator
1
8
3
22
700
0.6
18
200-800
0.5
96
QFN-30
5x5
Proprietary emulated current mode COT
Light Load PFM, Enable, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Built-in 3.3/5V LDO, Soft Start Adjustable, Internal Compensation, Adjustable Current Limit
-40 to 125
12A 300KHz Buck Regulator
1
12
3
22
1500
0.8
20.2
300
1.0
93
DFN-26
7x4
Voltage Mode PWM
Enable, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO Adjustable, Built-in 3.3/5V LDO, Soft Start Adjustable, Adjustable Current Limit
-40 to 125
6A 600kHz Buck Regulator
1
6
2.5
28
1500
0.8
27
600
1.0
92
DFN-26
7x4
Voltage Mode PWM
Enable, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO Adjustable, Soft Start Adjustable
-40 to 125
3A 900kHz Buck Regulator
1
3
2.5
20
1500
0.8
19
900
1.0
92
DFN-26
7x4
Voltage Mode PWM
Enable, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO Adjustable, Soft Start Adjustable
-40 to 125
3A 300kHz Buck Regulator
1
3
2.5
28
1500
0.8
27
300
1.0
95
DFN-26
7x4
Voltage Mode PWM
Enable, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO Adjustable, Soft Start Adjustable
-40 to 125
600mA Synchronous Step-Down Converter
1
0.6
2.5
5.5
200
0.6
5
1500
2.0
95
SOT23-5
-
Current Mode PWM
Light Load PFM, Enable, Over Current Protection, Synchronous Rectification, Thermal Shutdown, 100% Duty Cycle
-40 to 85
800mA Synchronous Buck Regulator
1
0.8
2.7
5.5
20
0.8
5
PFM
<4.0
98
DFN-10
-
COT
Light Load PFM, Enable, Over Current Protection, Power Good, Synchronous Rectification, Thermal Shutdown, UVLO Adjustable, Internal Compensation, 100% Duty Cycle
-40 to 85
Synchronous Step-Down Converter
1
1
2.7
5.5
1000
0.9
5
1400
<4.0
97
MSOP-10
-
Current Mode PWM
Light Load PFM, Enable, Over Current Protection, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Clock Sync, Soft Start Adjustable, 100% Duty Cycle
-40 to 85