Single Output Regulators

buck boost, step down regulator, low voltage regulator, voltage regulators, power board, switched mode power supplyVoltage conversion and regulation plays a key part in electronics design. In the past, the supply of power rails was more of an afterthought. But today’s designs are more focused on highly efficient power conversion and control, combined with optimization of costs, solution size, and robustness.

Allegro leverages its proprietary wafer process technologies to provide optimized DC/DC converters typically in the rating ranges of 20 V, 40 V, and 60 V, with integrated switches (rather than controllers or standalone LDOs).

Single output regulators are focused mainly on the buck conversion topology, although some devices are also available in boost or flyback configurations. Automotive and non-automotive devices are available with a variety of package types, most with exposed pad for excellent thermal dissipation. 

See below for our offering of buck regulators, buck/boost regulators, step down regulators, and low voltage regulators:

Linear Regulators
 Part Number  Key Features  VIN Range
(V)
VOUT
(V)
 IOUT
(mA)
AEC-Q100
Automotive
Packages 
A4481 50 V rating, short-to-battery protection 5.25 to 50 5.0 50 Yes eSOIC-8
 
Buck-Boost Regulators
 Part Number  Key Features  VIN Range
(V)
 IOUT
(A)
AEC-Q100
Automotive
RDS(on)
(mΩ)
fSWRange
(kHz)
Packages 
A4450
Wide Input Buck Regulator with Seamless Mode Transition 3 to 36
1.0 Yes  80  250 to 2200
4 x 4 QFN-20 Wettable Flank
 
DC/DC Switching Regulators - Non-Synchronous
 Part Number  Key Features  VIN Range (V)  IOUT (A) AEC-Q100
Automotive
RDS(on)
(mΩ)
fSW Range
(kHz)
Packages 
A4403 Valley Current Mode Control Buck Regulator, Fixed tON
9 to 46 3.0 No 350 400 to 2000 QFN-16 
A4447 Wide Input Voltage Step-Down Regulator
8 to 50 2.0 No 450 Fixed tOFF eSOIC-8 
A8498 Wide Input Voltage Step Down Regulator
8 to 50 3.0 No 450 Fixed tOFF eSOIC-8 
A8580 Low IQ, Adjustable VOUT, Selectable PFM
3.5 to 35 2.5 Yes 110 250 to 2400 eTSSOP-16
A8582 Low VIN Operation, 2.4 MHz Regulator
4.7 to 36

2.0

Yes 70 250 to 2400

eTSSOP-16 

A8583 Low VIN Operation, 2.4 MHz Regulator
4.7 to 36 3.5 Yes 70 250 to 2400

eTSSOP-16 

A8584 Low VIN Operation, 500 kHz Regulator

4.7 to 36

2.5 Yes 100 250 to 500

eTSSOP-16

A8585 Low IQ, fixed 5.0 VOUT, Selectable PFM, Dithering
3.5 to 35 2.0 Yes 115 300 to 550 eSOIC-10
A8585-1
Low IQ, fixed 3.3 VOUT, Selectable PFM, Dithering
3.5 to 35 2.0 Yes 115 300 to 550 eSOIC-10
A8585-2
Low IQ, fixed 5.0 VOUT, Selectable PFM, Dithering
3.5 to 35 2.0 Yes 115 300 to 550 eSOIC-10
A8585-3
Low IQ, fixed 3.3 VOUT, Selectable PFM, Dithering
3.5 to 35 2.0 Yes 115 300 to 550 eSOIC-10
A8586 Wide Input Voltage, Buck Regulator with Adjustable Dithered Frequency and PFM Mode 3.8 to 40
3.5
Yes 150 250 to 4000 DFN-10
eSOIC-8
A8586-1 Wide Input Voltage, Buck Regulator with Adjustable Dithered Frequency
3.8 to 40
3.5 Yes 150 250 to 4000 eSOIC-8
A8586-2 Wide Input Voltage, Buck Regulator with Adjustable Dithered Frequency
3.8 to 40
3.5 Yes 150 250 to 4000 eSOIC-8
A8587
Wide Input Voltage, Buck Regulator with Adjustable Dithered Frequency, PFM mode, and NPOR
3.8 to 40 2.0 Yes 150 250 to 4000 DFN-10
A8589 Low IQ, Adjustable VOUT, Selectable PFM, Low Dropout Operation 3.5 to 35 2.5 Yes 110 250 to 2400 eTSSOP-16
A8590 Low IQ, Adjustable VOUT, Selectable PFM, Low Dropout, Enhanced Idle/Stop/Start Recovery
3.5 to 35 3.0 Yes 110 250 to 2400 eTSSOP-16
A8591
Ultralow IQ, Fixed 5.0 VOUT, Automatic PFM, Dithering 3.6 to 40 2.0 Yes 110 300 to 2400 3×3 DFN-10 Wettable Flank
A8591-1
Ultralow IQ, Fixed 3.3 VOUT, Automatic PFM, Dithering
3.6 to 40 2.0 Yes 110 300 to 2400 3×3 DFN-10 Wettable Flank
 
DC/DC Switching Regulators - Synchronous FET
 Part Number  Key Features  VIN Range
(V)
 IOUT
(A)
AEC-Q100
Automotive
RDS(on)
(mΩ)
fSW Range
(kHz)
Packages 
A8650 Synchronous, Low VIN, P-Channel HS MOSFET, Pre-Bias
2.5 to 5.5 2.0 Yes 70 / 55 250 to 2400 MSOP-10
DFN-10
A8652 Synchronous Buck Regulator with Cable Drop (USB) Compensation
3 to 40
1.0
Yes 80 / 55 100 to 2200 eTSSOP-16
A8653 Synchronous Buck Regulator with Cable Drop (USB) Compensation
3 to 40
2.6 Yes 80 / 55 100 to 2200 eTSSOP-16
A8654 Synchronous Buck Regulator, Wide VIN
3 to 40 3.0 Yes 80 / 55 100 to 2200 eTSSOP-16
 

 

The following single-output regulators have been discontinued: A8483, A8670, A8698A8672

 

The following single-output regulators are last-time buy: A8499


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