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RP502 Series

600mA PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier

  • Consumer
  • RoHS

The RP502 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP502 can be selected from two control types - fixed PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. RP502 includes a soft start circuit, an under-voltage lockout circuit (UVLO), and a latch protection circuit. By simply using an inductor and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured. The small inductor (1.0µH/2.2µH) and small output capacitor (4.7µF) can be used by the switching of 3.3MHz.

Specs & Datasheets

Input Voltage Range 2.5 V to 5.5 V (VOUT ≥ 1.0 V) (6.0 V)
2.5 V to 4.5 V (VOUT < 1.0 V) (6.0 V)
Operating Temperature Range -40°C to 85°C (125°C)
Supply Current Typ. 750 µA (Normal mode)
Typ. 180 µA (VFM mode)
Standby Current Typ. 0 µA
Output Voltage Range 0.8 V to 3.3 V (0.1 V step)
Output Voltage Accuracy ±1.5% (VOUT ≥ 1.6 V, Ta = 25°C)
±24 mV (VOUT < 1.6 V)
Output Current 600 mA
Driver ON-resistance Pch: Typ. 0.5 Ω, Nch: 0.5 Ω (VIN = 3.6 V)
Oscillator Frequency Typ. 3.3 MHz
Maximum Duty Cycle Min. 100%
Package WLCSP-6-P2, DFN1616-6

Download Datasheet

Protections / Functions

Functional Description

TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust

Technical Documents

Design Support

Typical Application

Typical Application

RP502x291B/293B (PWM/VFM auto switching control) Efficiency vs. Output Current

RP502x291B/293B (PWM/VFM auto switching control) Efficiency vs. Output Current

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
WLCSP-6-P2 RP502Z RP502Z-F
  • gradeConsumerC
DFN1616-6 RP502L RP502L

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Please contact us or our distributors for unpublished reliability information.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

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

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