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RP507 Series
600mA PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
The RP507 is low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. The RP507 is PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. The output voltage is adjustable with external divider resistors. The RP507 includes a soft start circuit, an under-voltage lockout circuit (UVLO), thermal shutdown circuit, and an auto-discharge circuit.
By simply using an inductor, capacitors and resistors as external components, a high-efficiency step-down DC/DC converter can be easily configured. A small size inductor (2.0 x 1.2mm, 2.2µH), a small size input capacitor (1.0 x 0.5mm, 4.7µF) and output capacitor (1.0 x 0.5mm, 10µF) can be used. A 1.6mm × 1.6mm DFN(PLP)1616-6D package is 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. 32 µA |
| Standby Current | Typ. 0 µA |
| Output Voltage Range | 0.7 V to 5.5 V (As for 1.0 V or less, input voltage range is limited.) |
| Output Voltage Accuracy | ±1.5% (Ta = 25°C) |
| Feedback Voltage | 0.6 V |
| Feedback Voltage Accuracy | ±9 mV |
| Feedback Voltage Temperature Coefficient | Typ. ±100 ppm/°C |
| Output Current | 600 mA |
| Driver ON-resistance | Pch: Typ. 0.38 Ω, Nch: Typ. 0.3 Ω (VIN = 3.6 V) |
| Oscillator Frequency | Typ. 2.0 MHz |
| Maximum Duty Cycle | 100% |
| Package | DFN(PLP)1616-6D |
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
RP507K001B Typical Application
L : 2.2µH / 4.7µH
RP507K001B Efficiency vs. Output Current (VOUT=1.8V, L=2.2µH)
RP507K001B Efficiency vs. Output Current (VOUT=3.3V, L=4.7µH)
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| RP507K001B-TR |
|
DFN(PLP)1616-6D | RP507K | RP507K |
C
P
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 |