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RP904 Series
1 A Step-down DCDC Converter with Synchronous Rectifier and Through mode

Product Specifications

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.

FEATURES

Input Voltage Range (Maximum Rating) 2.5 V to 5.5 V (6.5V)
Standby 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 1.2 V ~ 3.3 V or 1.0 V ~ 1.5 V (0.1 V Steps)
Output Voltage Accuracy ±2%
Output Current 1 A
Oscillator Frequency 2 MHz
Oscillator Maximum Duty Cycle Min. 100%
UVLO Detect Voltage Typ. 2.25 V
Soft Start Time Typ. 0.135 ms
Latch Protection Circuit Delay time for protection Typ. 0.8 ms
Package WLCSP-11-P2

*) VSET = Set Output Voltage

APPLICATION INFORMATION

TYPICAL CHARACTERISTICS

Efficiency vs. Output Current

PIN DESCRIPTION

WLCSP-11-P2

WLCSP-11-P22.37 mm × 1.47 mm
A1 AGND
A2 VSEL
A3 MODE
B1 PGND
B2 TEST
B3 Lx
C1 VDD*
C3 VDD*
D1 CE
D2 VOUT
D3 BYPASS

*) The VDD pins must be wired together when it is mounted on board.


RP904 Series for Consumer

APPLICATIONS

  • Power source for portable equipment such as DSC, DVC, and communication equipment

SELECTION GUIDE

In the RP904 Series, the output voltage, and the taping type for the ICs can be selected at the user's request.

Product Name   Package Quantity per Reel
RP904Zxx1A-E2-F Consumter WLCSP-11-P2 4,000
  • xx … Setting Output Voltage (VOUT) combination, alphanumeric custom code.

DOCUMENT/CONTACT

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Technical Support

Package *1 Marking Reliability *2
WLCSP-11-P2 RP904Z RP904Z

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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