This Product Selection Guide contains information to help select products in the Voltage Regulators - Linear + Switching category on DigiKey.com
Products in this family are used for constructing circuits that perform a DC-DC conversion or voltage regulation function, using a combination of switch-mode and linear regulator functions. While exact topologies vary, the underlying goal of such products is to obtain a combination of the efficiency advantages of switch-mode techniques with the low-noise qualities of linear regulation.
SelectionCharacteristics
Topology: Indicates the style and configuration of the device.
Number of Outputs: Indicates how many outputs this device provides.
Frequency - Switching: Describes a device’s nominal operating frequency or frequency range; the rate at which an input power source is switched in the course of the conversion process.
Voltage/Current - Output 1: Describes output voltage (or voltage range if adjustable) and maximum output current of a device’s primary output, commonly the first in a series of cascaded regulator stages.
Voltage/Current - Output 2: Describes output voltage (or voltage range if adjustable) and maximum output current of a device’s second output.
Voltage/Current - Output 3: Describes output voltage (or voltage range if adjustable) and maximum output current of a device’s third output.
w/LED Driver: Indicates whether or not a device includes a secondary system for driving LED illumination circuitry.
w/Supervisor: Indicates whether or not a device includes integrated supervisor circuitry allowing for monitoring and feedback control of the device.
w/Sequencer: Indicates whether or not a device includes provisions for controlling the order in which multiple outputs become active during power-up.
Voltage - Supply: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Mounting Type: Indicates how the device is attached.
Package / Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the supplier device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
Supplier Device Package: This is what the manufacturer calls the package of this device. They are manufacturer specific. It is typically best to use the actual dimensions from the datasheets rather than to go by this terminology when designing your circuit.
ProductExamples
| MFR PART # | BD71850MWV-E2 |
|---|---|
| DIGI-KEY PART # | 846-BD71850MWV-E2TR-ND - Tape & Reel (TR) |
| MANUFACTURER | Rohm Semiconductor |
| DESCRIPTION | PMIC - Voltage Regulators - Linear Switching 12 Output Step-Down (Buck) (6), Linear (LDO) (6) 2MHz UQFN56BV7070 |
| DATASHEET | Click Here |
| MFR PART # | LT3645EMSE#PBF |
|---|---|
| DIGI-KEY PART # | 505-LT3645EMSE#PBF-ND |
| MANUFACTURER | Analog Devices Inc. |
| DESCRIPTION | PMIC - Voltage Regulators - Linear Switching 2 Output Step-Down (Buck) (1), Linear (LDO) (1) 750kHz 12-MSOP-EP |
| DATASHEET | Click Here |
| MFR PART # | LM26480SQ-AA/NOPB |
|---|---|
| DIGI-KEY PART # | LM26480SQ-AA/NOPBTR-ND - Tape & Reel (TR) |
| MANUFACTURER | Texas Instruments |
| DESCRIPTION | PMIC - Voltage Regulators - Linear Switching 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (2) 2MHz 24-WQFN (4x4) |
| DATASHEET | Click Here |
| MFR PART # | SIC401ACD-T1-GE3 |
|---|---|
| DIGI-KEY PART # | SIC401ACD-T1-GE3TR-ND - Tape & Reel (TR) |
| MANUFACTURER | Vishay Siliconix |
| DESCRIPTION | PMIC - Voltage Regulators - Linear Switching 2 Output Step-Down (Buck) Synchronous (1), Linear (LDO) (1) 200kHz ~ 1MHz PowerPAK® MLP55-32 |
| DATASHEET | Click Here |
MediaLinks
Articles
Hybrid Power Supplies Deliver Noise-Free Voltages
Selecting the Correct Regulator
Understanding the Advantages and Disadvantages of Linear Regulators