RP400 Series
Current Mode PWM/VFM Step-up DC/DC Converter
Description
The RP400 Series are CMOS-based automatic switch PWM- or VFM-controlled step-up DC/DC converters. RP400 includes a soft start circuit. By simply using an inductor, a capacitor, a diode, and (resistors) as external components, a high-efficiency step-up DC/DC converter can be easily configured. Due to current mode PWM control, the RP400 provides a fast response and high efficiency. Ceramic output capacitors can be used. The output voltage can be selected from the internally fixed or the externally adjustment. The RP400 has an anti-ringing switch that prevents inductor current from ringing in PWM discontinuous mode. RP400 switches automatically to VFM control in low output current, keeping high efficiency. In addition to SOT-23-5 package, a 1.8mm × 2.0mm square DFN(PL)1820-6 package is also available.
Spec
| Standard | |
|---|---|
| Input Voltage Range | 0.7 V to 5.5 V (6.0 V) |
| Operating Temperature Range | -40°C to 85°C (125°C) |
| Supply Current | Typ. 300 µA (VSET = 3.0 V, switching) Typ. 160 µA (non-switching) |
| Standby Current | Typ. 0.15 µA (CE="L") (Ver. A/C) |
| Start-up Voltage | Max. 0.9 V (Ver.C: Max. 1.5 V) |
| Output Voltage Range | 1.8 V to 5.0 V (Internally Fixed Ver.: xx1, Externally Adjustable Ver.: 001) |
| Output Voltage Accuracy | ±2% (Ta = 25°C) |
| Oscillator Frequency | Typ. 700 kHz |
| Maximum Duty Cycle | Typ. 88% |
| Package | DFN(PL)1820-6, 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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RP400x001A Typical Application (Externally adjustable output voltage type)
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RP400xxx1A Typical Application (Internally fixed output Voltage type)
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RP400x001A Efficiency vs. Output Current
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Related Links
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| RP400Kxx1A-TR |
|
DFN(PL)1820-6 | RP400Kxx1A | RP400K |
| RP400Kxx1B-TR |
|
DFN(PL)1820-6 | RP400Kxx1B | RP400K |
| RP400Kxx1C-TR |
|
DFN(PL)1820-6 | RP400Kxx1C | RP400K |
| RP400Nxx1A-TR-FE |
|
SOT-23-5 | RP400Nxx1A | RP400N-FE |
| RP400Nxx1B-TR-FE |
|
SOT-23-5 | RP400Nxx1B | RP400N-FE |
| RP400Nxx1C-TR-FE |
|
SOT-23-5 | RP400Nxx1C | RP400N-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