RP507 Series
600mA PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
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Description
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(PL)1616-6D package is available.
Spec
Standard | |
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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(PL)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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Functional Description
TSD | Thermal Shutdown Function |
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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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RP507K001B Typical Application
L : 2.2µH / 4.7µH
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RP507K001B Efficiency vs. Output Current (VOUT=1.8V, L=2.2µH)
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RP507K001B Efficiency vs. Output Current (VOUT=3.3V, L=4.7µH)
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Related Links
Quality & Packages
Product Name | Compatibility | Package | Marking | Reliability |
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RP507K001B-TR |
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DFN(PL)1616-6D | See datasheet | RP507K |
- 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.