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Overview
| Topology | Buck Converter |
| Input voltage | 4.5-18 V |
| Switching frequency | 200-1600 kHz |
| Output 1 | 5 V / 8 A |
| IC revision | DS7299B-04 |
Description
The RT7299B is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 8A output current from a 4.5V to 18V input supply. The RT7299B current-mode architecture with external compensation allows the transient response to be optimized over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. Fault condition protections include output under-voltage protection, output over-voltage protection, and over-temperature protection. The low current shutdown mode provides output disconnection, enabling easy power management in battery-powered systems.
Features
- Low RDS(ON) Power MOSFET Switches 26mΩ/19mΩ
- Input Voltage Range : 4.5V to 18V
- Adjustable Switching Frequency : 200kHz to 1.6MHz
- Current-Mode Control
- Synchronous to External Clock : 200kHz to 1.6MHz
- Accurate Voltage Reference 0.6V ± 1%
- Monotonic Start-Up into Pre-biased Outputs
- Adjustable Soft-Start
- Power Good Indicator
- Input Under-Voltage Lockout
- Selectable Hiccup Mode and Latch-Off Mode Under-Voltage Protection
- Over-Temperature and Over-Voltage Protection
- RoHS Compliant and Halogen Free
Typical applications
- Notebook Computers
- High Performance Point of Load Regulation / High Density and Distributed Power Systems
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCI SMT Flat Wire High Current Inductor, 4.2 µH, 15.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Inductance4.2 µH | Performance Rated Current15.4 A | Saturation Current @ 10%5 A | Saturation Current @ 30%14 A | DC Resistance7.1 mΩ | Self Resonant Frequency33 MHz | MaterialSuperflux | ||||
| WE-HCI SMT Flat Wire High Current Inductor, 4.7 µH, 14.9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Inductance4.7 µH | Performance Rated Current14.9 A | Saturation Current @ 10%6 A | Saturation Current @ 30%15 A | DC Resistance7 mΩ | Self Resonant Frequency30 MHz | MaterialWE-PERM | ||||
| WE-HCI SMT Flat Wire High Current Inductor, 5.5 µH, 12 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Inductance5.5 µH | Performance Rated Current12 A | Saturation Current @ 10%4.5 A | Saturation Current @ 30%12 A | DC Resistance10.3 mΩ | Self Resonant Frequency30 MHz | MaterialSuperflux | ||||
| WE-HCI SMT Flat Wire High Current Inductor, 6 µH, 13.6 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Inductance6 µH | Performance Rated Current13.6 A | Saturation Current @ 10%6 A | Saturation Current @ 30%14 A | DC Resistance8.4 mΩ | Self Resonant Frequency22 MHz | MaterialWE-PERM |