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Overview
| Topology | Buck Converter |
| Input voltage | 4.5-18 V |
| Output 1 | 5 V / 4 A |
Description
The RT6254A is a high-efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 4A output current from a 4.5V to 18V input supply. The RT6254A adopts ACOT architecture to allow the transient response to be improved and keep in constant frequency. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. Fault conditions also include output under voltage protection and thermal shutdown.
Features
- 4.5V to 18V Input Voltage Range
- 4A Output Current
- Constant-on-Time Mode to Enables Fast Transient Response
- Low Output Ripple and Allows Ceramic Output Capacitor
- 500kHz Switching Frequency
- High Efficient Internal Power MOSFET Switch Optimized for Lower Duty Cycle Applications
- Integrated 48mΩ/25mΩMOSFETs
- Adjustable Output Voltage from 0.6V to 5V
- Internal Soft-Start (1.5ms typ.)
- Built-In UVP/OTP
- Power Good Indicator (90%)
- Input Under Voltage Lockout
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | Material | LR(µH) | fres(MHz) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCC SMT High Current Cube Inductor, 4.7 µH, 8.9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCC SMT High Current Cube Inductor | Inductance4.7 µH | Performance Rated Current8.9 A | Saturation Current @ 10%7.7 A | Saturation Current @ 30%9.5 A | DC Resistance13.5 mΩ | MaterialFerrite | Rated Inductance3.5 µH | Self Resonant Frequency45 MHz |