Datasheet

www.recom-power.com
REV.: 2/2019 RPM-4
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
REGULATIONS
Parameter Condition Value
Output Accuracy ±3.0% max.
Line Regulation low line to high line, full load 0.5% typ. / ±3.0% max.
Load Regulation 0% to 100% load 1.0% typ. / 3.0% max.
Soft-Start Time
refer to soft-start capacitor calculation
Transient Response
100% - 10% load step
recovery time
200mV max.
6ms typ.
25% load step change
recovery time
150mV max.
500µs typ.
continued on next page
Sequencing Multiple Modules
The SEQ pin can be used to program the rising edge of the output voltage. An internal current source charges a soft-start capacitor which
is connected from the sequencing pin to GND. The following equation is used to calculate the soft-start capacitor:
RPM-6.0
Series
REMOTE SENSE
GND
+V
in
+V
in
GND GND
Trim
+Sense
+V
out
R
up
RW
1
R
down
GND
+V
out
RW
1
... wire losses +
R
up
... trim up resistor
R
down
... trim down resistor
The output voltage can be adjusted via the trim and
sense functions.
The maximum output voltage from Trim and Sense
function combined is 5.5VDC. Derating may be
required when using Trim and/or sense functions.
C
ss
= soft-start capacitor
I
ss
= sum of all soft-start currents of all sequenced modules
t
ss
= required soft-start time
n = number of RPMs
I
ss
[µA] Preset soft-start time [µs]
Min. Typ. Max. Min. Typ. Max.
4.5 5.0 5.5 750 825 920
Note: there is a 3.3nF internal soft-start capacitor, and there are different constant
current sources in the modules which leads to different preset soft-start times.
C
ss
=
t
ss
x I
ss
- n x 3.3nF
1.25V