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RP501 Series

1A PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier

  • Consumer
  • RoHS

The RP501 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP501 can be selected from two control types by input signal to the MODE pin - fixed PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. RP501 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 (2.2µH) can be used by the switching of 2.25MHz. The frequency accuracy improved to ±10%.

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. 450 µA (PWM, no switching)
Typ. 140 µA (VFM, no switching)
Standby Current Typ. 0 µA (CE = "L")
Output Voltage Range 1.0 V to 3.3 V (0.1 V step)
Output Voltage Accuracy ±1.5% (Ta = 25°C)
Output Current 1 A
Oscillator Frequency Typ. 2.25 MHz
Maximum Duty Cycle Min. 100%
Package DFN(PLP)2527-10

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

Typical Application

Typical Application

RP501K331x (PWM/VFM auto switching control) Efficiency vs. Output Current

RP501K331x (PWM/VFM auto switching control) Efficiency vs. Output Current

Quality & Packages

Product Name Compatibility Package Marking Reliability
RP501Kxx1x-TR
  • gradeConsumerC
  • plpP
DFN(PLP)2527-10 RP501K RP501K

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Please contact us or our distributors for unpublished reliability information.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

Search for similar products under conditions below.

Category:DC/DC Switching Regulators

Topology Buck
VIN
min (V)
2.5
VIN
max (V)
5.5
VOUT
min (V)
1.0
VOUT
max (V)
3.3
IOUT
(mA)
1000
ISS
(µA)
140