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RP508 Series
600mA 6MHz PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
The RP508 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier featuring 600mA* output current. The power controlling method can be selected from forced PWM control type or PWM/VFM auto switching control type by inputting a signal to the MODE pin.
The RP508 includes a soft start circuit, an under-voltage lockout circuit (UVLO), a thermal shutdown circuit, and an auto-discharge function. The RP508 requires only a small numbers of external components to configure a high-efficiency step-up DC/DC converter: an inductor, capacitors and a diode as external components. The high-speed response corresponding to the high-speed switching frequency of 6MHz. The small-sized inductors (1.6 x 0.8 mm, 0.47µH) can be used. A 1.2-mm square compact DFN(PLP)1212-6F package is available.
*) This is an approximate value, because output current depending on conditions and external parts.
Specs & Datasheets
| Consumer | |
|---|---|
| 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. 15 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 | Typ. ±100 ppm/°C |
| Output Current | 600 mA |
| Driver ON-resistance | Pch: Typ. 0.33 Ω, Nch: Typ. 0.24 Ω (VIN = 3.6 V) |
| Oscillator Frequency | Typ. 6.0 MHz |
| Maximum Duty Cycle | 100% |
| Package | DFN(PLP)1212-6F |
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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Technical Documents
Typical Application
RP508K181x Efficiency vs. Output Current (VOUT=1.8V)
RP508K181x Efficiency vs. Output Current (VOUT=3.3V)
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| RP508Kxx1x-TR |
|
DFN(PLP)1212-6F | RP508K | RP508K |
C
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Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.
Sample / Buy
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Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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 |