RP504 Series
600mA PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
Description
The RP504 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP504K/L can be switched from two control types by inputting signal to the MODE pin - forced PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. (RP504N Series can be selected from forced PWM control or PWM/VFM auto switching control.) RP504 includes a soft start circuit, an under-voltage lockout circuit (UVLO), and a latch protection circuit. By simply using an inductor and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured. The small inductor (2.2µH) and output capacitor (4.7µH) can be used by the switching of 2.25MHz. In addition to SOT-23-5 and DFN1616-6B packages, a 1.2mm × 1.6mm DFN(PL)1216-6F package is also available.
Spec
| Standard | |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V (6.5 V) |
| Operating Temperature Range | -40°C to 85°C (125°C) |
| Supply Current | Typ. 25 µA (VFM, no load) |
| Standby Current | Typ. 0 µA |
| Output Voltage Range | 0.8 V to 3.3 V (0.1 V step) |
| Output Voltage Accuracy | ±1.5% (VOUT ≥ 1.2 V, Ta = 25°C) ±18 mV (VOUT < 1.2 V) |
| Output Voltage Temperature Coefficient | ± 40 ppm/°C |
| Output Current | 600 mA |
| Driver ON-resistance | Pch: Typ. 0.34 Ω, Nch: Typ. 0.43 Ω (VIN = 3.6 V) |
| Oscillator Frequency | Typ. 2.25 MHz |
| Maximum Duty Cycle | Min. 100% |
| Package | DFN(PL)1216-6F, DFN1616-6B, SOT-23-5 |
Protections / Functions
| TSD | ILX | OCP | OVP | UVLO | OVLO | Reverse | Shutdown | Soft Start | SSCG | PGOOD | Auto Discharge | Anti-ringing | Sequencing | Max Duty | Ext. Phase | LED Adjust |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Functional Description
| TSD | Thermal Shutdown Function |
|---|---|
| ILX | LX Current Limit Function |
| OCP | Overcurrent Protection |
| OVP | Overvoltage Protection |
| UVLO | Undervoltage Lockout Protection |
| OVLO | Overvoltage Lockout Protection |
| Reverse | Reverse Current Protection Circuit |
| Shutdown | Shutdown Function |
| Soft Start | Soft Start Function |
| SSCG | Spread Spectrum Clock Generator Function |
| PGOOD | Power Good Output |
| Auto Discharge | Auto Discharge Function |
| Anti-ringing | Anti-ringing Switch Function |
| Sequencing | Start-up Sequencing Control |
| Max Duty | Maximum Duty Cycle |
| Ext. Phase | Externally Adjustable Phase Compensation |
| LED Adjust | LED High-speed Dimming Control |
Technical Documents
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Typical Application
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RP504x331x Efficiency vs. Output Current
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Related Links
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| RP504Kxx1x-E2 |
|
DFN(PL)1216-6F | RP504K | RP504K |
| RP504Lxx1x-TR |
|
DFN1616-6B | RP504L | RP504L |
| RP504Nxx1x-TR-FE |
|
SOT-23-5 | RP504N | RP504N-FE |
- Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
FAQ
Buy / Contact
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Purchase, Request for samples and documentsSales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
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Available from 1 piece!Our electronic device products are available through our authorized online distributors.
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Technical Support