RP904 Series
1A Step-down DC/DC Converter with Synchronous Rectifier and Through mode
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Description
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.
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Spec
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 mVOutput 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 -
Technical
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Typical Application
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Efficiency vs. Output Current
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Related Links
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Quality &
PackagesProduct Name Compatibility Package Marking Reliability RP904Zxx1A-E2-F WLCSP-11-P2 RP904Z RP904Z-F - 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.
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Sample / Buy
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Buy Online
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Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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Download Datasheet
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 |