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RP507 Series
600mA PWM/VFM Step-down DCDC Converter with Synchronous Rectifier

Product Specifications

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(PLP)1616-6D package is available.

FEATURES

Input Voltage Range (Maximum Rating) 2.3 V to 5.5 V (6.5V)
Supply Current (at no load) Typ. 34 µA
Standby Current Typ. 0 µA
Output Voltage Range 0.7 V to 5.5 V (Note: As for 1.0 V or less, input voltage range is limited.)
Feedback Voltage Accuracy ±9 mV (VFB=0.6V)
Temperature-Drift Coefficient of Feedback Voltage Typ. ±100 ppm/°C
Oscillator Frequency Typ. 2.0 MHz
Maximum Duty Cycle 100%
Built-in Driver ON Resistance Typ. Pch. 0.38 Ω, Nch. 0.3 Ω (VIN=3.6V)
UVLO Detector Threshold Typ. 2.0 V
Soft-start Time Typ. 150 µs
Lx Current Limit Circuit Typ. 1 A
Package DFN(PLP)1616-6D

APPLICATION INFORMATION

RP507K001B

L : 2.2µH / 4.7µH

TYPICAL CHARACTERISTICS

Efficiency vs. Output Current
VOUT=1.8V, L=2.2µH

Efficiency vs. Output Current
VOUT=3.3V, L=4.7µH

PIN DESCRIPTION

DFN(PLP)1616-6D

DFN(PLP)1616-6D1.6 mm × 1.6 mm
1 CE
2 AGND**
3 PGND**
4 Lx
5 VIN
6 VFB

*) The tab is substrate level (GND).
**) No.2 pin and No.3 pin must be wired together when it is mounted on board.


RP507 Series for Consumer

APPLICATIONS

  • Power source for portable equipment such as cellular, PDA, DSC, Notebook PC, smartphone
  • Power source for Li-ion battery-used equipment

PRODUCT LONGEVITY PROGRAM

RP507 series operate PRODUCT LONGEVITY PROGRAM (ten-year supply is maintained as of January, 2016).
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.


SELECTION GUIDE

Product Name   Package Quantity per Reel
RP507K001B-TR ConsumterPLP DFN(PLP)1616-6D 5,000

Output voltage (VSET) is adjustable with external divider resistors.
Recommended output voltage range is from 0.7V to 5.5V.
RP507K001B has an auto-discharge function.

* Auto-discharge function quickly lowers the output voltage to 0V, when the chip enable signal is switched from the active mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor.

DOCUMENT/CONTACT

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Technical Support

Package *1 Marking Reliability *2
DFN(PLP)1616-6D RP507K RP507K

*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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