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Overview
| Topology | Buck Converter |
| Input voltage | 4.5-18 V |
| Switching frequency | 400-600 kHz |
| Output 1 | 5 V / 6 A |
| IC revision | 1 |
Description
The RT6257A/B is a high-efficiency, monolithic synchronous step-down DC-DC converter that can deliver up to 6A output current from a 4.5V to 18V input supply. The RT6257A/B 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
- 6A 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 30m/20mMOSFETs
- Adjustable Output Voltage from 0.6V to 5V
- Internal Soft-Start (1.5ms typ.)
- Built-In UVP/OTP
- Input Under Voltage Lockout
- TSOT23-6 (FC) Package
Typical applications
- LCD TV
- Portable TV
- Access Point Router/ Set Top Box/ DSL Modem
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 | RDC max. (mΩ) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744325120 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 1.2 | 32.6 | 12 | 25 | 1.8 | 75 | Superflux | 1.98 | SMT | ||
 | 74437368033 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LHMI SMT Power Inductor | 3.3 | 11.1 | 15.6 | 31.2 | – | 22 | – | 11.8 | SMT |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 744325120 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 74437368033 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | RDC max. (mΩ) | Mount | Samples |
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