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RP904 Series
1A Step-down DC/DC Converter with Synchronous Rectifier and Through mode
The RP904 Series are CMOS-based step-down DCDC converters with Synchronous Rectifier featuring 1 A* output current and have through mode. RP904 includes an under-voltage lockout circuit (UVLO), a soft start circuit and a timer latch protection circuit. By simply using an inductor and capacitors as external components, a high-efficiency step-down DCDC converter can be easily configured.
The output voltage of DCDC converter can be selected from 2 voltage by inputting signal to VSEL pin. The DCDC converter is PWM/VFM manual switching control. RP904 is able to select DCDC mode or through mode by inputting signal to BYPASS pin. WLCSP-11-P2 package is available.
*) This is an approximate value, because output current depending on conditions and external parts.
Specs & Datasheets
| Consumer | |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V (6.5 V) |
| Operating Temperature Range | -40°C to 85°C (125°C) |
| Supply Current | Typ. 435 µA (Through mode) Typ. 410 µA (PWM mode, non-switching) Typ. 165 µA (VFM mode, non-switching) |
| Standby Current | Typ. 0.02 µA (VIN = 5.5 V, CE = "L") |
| Output Voltage Range | VSET1: 1.2 V to 3.3 V (0.1 V step) VSET2: 1.0 V to 1.5 V (0.1 V step) |
| Output Voltage Accuracy | VSET1: ±2% VSET2: ±30 mV |
| Output Current | 1 A |
| Oscillator Frequency | Typ. 2 MHz |
| Maximum Duty Cycle | Min. 100% |
| Package | WLCSP-11-P2 |
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
Efficiency vs. Output Current
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| RP904Zxx1A-E2-F |
|
WLCSP-11-P2 | RP904Z | RP904Z-F |
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Please contact us or our distributors for unpublished reliability information.
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 |