R5220 Series
400mA PWM Step-down DC/DC Converter with Switch Function
Description
The R5220 Series are CMOS-based PWM step-down DC/DC converters with synchronous rectifier. R5220 also has the function of switching to the LDO regulator. By switching with the MODE pin, the device can be used as an LDO regulator (Output Current 50mA) in the smaller output current range, while it can be used as a DC/DC converter (Output Current 400mA*) under high load conditions. (The polarity of the MODE pin is selectable.) The DC/DC converter contains an under-voltage lockout circuit (UVLO), a soft start circuit, and a latch type protection circuit. By simply using an inductor and a capacitor, a high-efficiency DC/DC converter can be easily configured. *) This is an approximate value, because output current depending on conditions and external parts.
Spec
| Standard | |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V (6.5 V) |
| Operating Temperature Range | -40°C to 85°C (125°C) |
| Supply Current | Typ. 350 µA (DC/DC operation) Typ. 5.0 µA (LDO operation) |
| Standby Current | Typ. 0.1 µA |
| Output Voltage Range | 1.0 V to 3.3 V (0.1 V step) |
| Output Voltage Accuracy | ±2% (VOUT ≥ 1.5 V, Ta = 25°C) ±30 mV (VOUT < 1.5 V) |
| Output Current | 400 mA (DC/DC operation) 50 mA (LDO operation) |
| Driver ON-resistance | Pch: 0.5 Ω, Nch: 0.5 Ω (VIN = 3.6 V) |
| Oscillator Frequency | Typ. 1.2 MHz |
| Package | DFN(PL)2514-6 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |
|
|
|
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
-
Typical Application
-
R5220K181A Efficiency vs. Output Current
-
Related Links
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| R5220Kxxxx-TR |
|
DFN(PL)2514-6 | R5220K | R5220K |
- 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
-
Purchase, Request for samples and documentsSales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
-
Available from 1 piece!Our electronic device products are available through our authorized online distributors.
-
Technical Support