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RP506K

RICOH
Part Number RP506K
Manufacturer RICOH
Description PWM/VFM Step-down DC/ DC Converter
Published Jun 6, 2014
Detailed Description RP506K Series 2A*1 PWM/VFM Step-down DC/ DC Converter with Synchronous Rectifier NO.EA-296-120525 OUTLINE The RP506K Se...
Datasheet PDF File RP506K PDF File

RP506K
RP506K


Overview
RP506K Series 2A*1 PWM/VFM Step-down DC/ DC Converter with Synchronous Rectifier NO.
EA-296-120525 OUTLINE The RP506K Series are low supply current CMOS-based PWM/VFM step-down DC/ DC converters with synchronous rectifier featuring 2A*1 output current.
Internally, a single IC consists of an oscillator, a reference voltage unit, an error amplifier, a switching control circuit, a mode control circuit, a soft start circuit, a latch protection circuit, an under-voltage lockout (UVLO) circuit, a thermal shutdown circuit, and switching transistors.
By simply using an inductor and capacitors as external components, without connecting any diode, a low ripple and high efficiency synchronous rectifier step-down DC/ DC converter can be easily configured.
RP506K is available in DFN(PLP)2527-10 package which achieves high-density mounting on boards.
RP506K is available in the fixed output voltage type (RP506Kxx1A/ B/ D/ E) which can be set by 0.
1 V step and the output voltage accuracy is as high as ±1.
5% or ±18mV, or the adjustable output voltage type (RP506K001C/ F) which can be set by using the external resistors.
The oscillator frequency can be selected from 2.
25MHz (RP506Kxx1A/ B/ C) or 1.
2MHz (RP506K001C/ F).
By inputting a signal to MODE pin, RP506K can choose PWM/VFM auto switching control or forced PWM control.
In low output current, PWM/VFM auto switching control automatically switches from PWM mode to VFM mode in order to achieve high efficiency.
Likewise, in low output current, fixed PWM control switches at fixed frequency in order to reduce noise.
RP506K contains a latch type protection circuit which latches the built-in driver to the OFF state during high load or if the output is short-circuited for a specified time (protection delay time).
The latch protection circuit can be released by once setting the IC into the standby mode with the CE pin and then setting it back to the active mode, or, by turning the power off and back on.
Setting the supply voltage lower tha...


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