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RP504 Series
600mA PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
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(PLP)1216-6F package is also available.
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. 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(PLP)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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Technical Documents
Typical Application
RP504x331x Efficiency vs. Output Current
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| RP504Kxx1x-E2 |
|
DFN(PLP)1212-6F | RP504K | RP504K |
| RP504Lxx1x-TR |
|
DFN1616-6B | RP504L | RP504L |
| RP504Nxx1x-TR-FE |
|
SOT-23-5 | RP504N | RP504N-FE |
C
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.
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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 |