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Overview
| Topology | Buck Converter |
| Input voltage | 5.5-36 V |
| Switching frequency | 425-575 kHz |
| Output 1 | 2.5 V / 5 A |
Description
The RT8279 is a step-down regulator with an internal power MOSFET. It achieves 5A of continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization.For protection, the RT8279 provides cycle-by-cycle current limiting and thermal shutdown protection. An adjustable soft-start reduces the stress on the input source at startup. In shutdown mode, the regulator draws only 25μA of supply current.The RT8279 requires a minimum number of readily available external components, providing a compact solution. The RT8279 is available in the SOP-8 (Exposed Pad) package.
Features
- 5A Output Current
- Internal Soft-Start
- 110mΩ Internal Power MOSFET Switch
- Internal Compensation Minimizes External Parts Count
- High Efficiency up to 90%
- 25μA Shutdown Mode
- Fixed 500kHz Frequency
- Thermal Shutdown
- Cycle-by-Cycle Over Current Protection
- Wide 5.5V to 36V Operating Input Range
- Adjustable Output Voltage from 1.222V to 26V
- Available In an SOP8 (Exposed Pad) Package
- RoHS Compliant and Halogen Free
Typical applications
- Battery Charger
- Pre-regulator for Linear Regulators
- DSL Modems
- Distributive Power Systems
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT(A) | RDC max.(mΩ) | fres(MHz) | Size | Version | IR(A) | ISAT,10%(A) | ISAT,30%(A) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PD SMT Power Inductor, 6.8 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance6.8 µH | – | Saturation Current5.8 A | DC Resistance22 mΩ | Self Resonant Frequency23.5 MHz | Size1050 | VersionPerformance | Rated Current5.2 A | – | – | ||||
 | WE-PD2 SMT Power Inductor, 6.8 µH, 2.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD2 SMT Power Inductor | Inductance6.8 µH | Performance Rated Current2.3 A | Saturation Current2.1 A | DC Resistance131 mΩ | Self Resonant Frequency41 MHz | Size4532 | – | Rated Current1.54 A | Saturation Current @ 10%2.1 A | Saturation Current @ 30%2.4 A | ||||
 | WE-PD SMT Power Inductor, 10 µH, 3.55 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance10 µH | Performance Rated Current3.55 A | Saturation Current2.6 A | DC Resistance49 mΩ | Self Resonant Frequency26 MHz | Size7345 | VersionStandard | Rated Current2 A | Saturation Current @ 10%2.6 A | Saturation Current @ 30%3.2 A | ||||
| WE-PD2 SMT Power Inductor, 10 µH, 1.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD2 SMT Power Inductor | Inductance10 µH | Performance Rated Current1.8 A | Saturation Current1.74 A | DC Resistance182 mΩ | Self Resonant Frequency37 MHz | Size4532 | – | Rated Current1.45 A | Saturation Current @ 10%1.74 A | Saturation Current @ 30%2 A | ||||
| WE-PD SMT Power Inductor, 15 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance15 µH | – | Saturation Current4.1 A | DC Resistance43 mΩ | Self Resonant Frequency16.8 MHz | Size1050 | VersionPerformance | Rated Current3.5 A | – | – | ||||
| WE-PD SMT Power Inductor, 15 µH, 7 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance15 µH | Performance Rated Current7 A | Saturation Current4.5 A | DC Resistance28 mΩ | Self Resonant Frequency16.6 MHz | Size1260 | VersionStandard | Rated Current4.2 A | Saturation Current @ 10%4.5 A | Saturation Current @ 30%5.8 A | ||||
| WE-PD SMT Power Inductor, 22 µH, 2.45 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance22 µH | Performance Rated Current2.45 A | Saturation Current1.7 A | DC Resistance110 mΩ | Self Resonant Frequency17 MHz | Size7345 | VersionStandard | Rated Current1.41 A | Saturation Current @ 10%1.7 A | Saturation Current @ 30%2.1 A |