Datasheet

ManualsBrandsRecom ManualsBoard Mounted DC / DC ConvertersDC/DC Converter 10 ... 36V 5V

www.recom-power.com

REV.: 2/2018 I-1

Features

Switching

Regulator

• Designed for 4-20mA loop operation and

energy scavenging applications

• Open frame SMD design

• -40°C to +105°C operating temperature @ full load

• Continuous short circuit protection

• No minimum load required

• 5000m operating altitude

R420-1.8/PL

Description

The R420 has been designed for auxiliary power from 4-20mA loops and other low power budget

applications that require a maximum input current <3.6mA. This low proﬁle SMD converter delivers

a regulated, short-circuit protected output that can be adjusted between 1.8V and 5V with a single

external resistor and delivers three times the output current of equivalent linear regulators to power

microprocessors, data-loggers and HART digital modems without affecting the analog 4-20mA signal.

The R420 will also ﬁnd many applications in energy scavenging and indoor solar powered circuits.

DC/DC Converter

Low

Current

Regulator

EN60950-1 certiﬁed

EN55032 certiﬁed

BASIC CHARACTERISTICS

Parameter Condition Min. Typ. Max.

Internal Input Filter 1µF capacitor

Input Voltage Range nom. Vin= 24VDC 10VDC 24VDC 36VDC

Quiescent Current 0.5mA 1mA

Under Voltage Lockout

DC-DC ON

DC-DC OFF

6VDC

5VDC

Output Voltage Trimming with 3.75kW 5VDC

Minimum Load 0%

ON/OFF CTRL

DC-DC ON

DC-DC OFF

Open or 2V<Vr<5V

Short or 0V<Vr<0.2Vr

Internal Operating Frequency 45kHz 50kHz 52kHz

Output Ripple and Noise

20MHz BW, 0-100% load 30mVp-p

continued on next page

Speciﬁcations (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)

Selection Guide

Part Input Adjustable Output Output Efﬁciency Max. Capacitive

Number Voltage Range Voltage Range Current typ.

(1)

Load

(2)

[VDC] [VDC] [mA] [%] [µF]

R420-1.8/PL 10-36 1.8-5.0 10 76 1000

Notes:

Note1: Efﬁciency is tested at 10-36VDC, full load and +25°C ambient

Note2: M ax cap load is tested at nominal input and full resistive load

Notes:

Note3: add sufﬁx “-R” for tape and reel packaging

Model Numbering

Ordering Examples:

R420-1.8/PL, standard tray packaging (40pcs/Tray)

R420-1.8/PL-R, tape and reel packaging (400pcs/T&R)

Packaging

(3)

R420-1.8/PL__

Summary of content (5 pages)

PAGE 1
• Designed for 4-20mA loop operation and energy scavenging applications • Open frame SMD design • -40°C to +105°C operating temperature @ full load • Continuous short circuit protection • No minimum load required • 5000m operating altitude Features Switching Regulator Description The R420 has been designed for auxiliary power from 4-20mA loops and other low power budget applications that require a maximum input current <3.6mA.
PAGE 2
R420-1.8/PL DC/DC Converter Series Specifications (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up) Ouput Current vs. Input Voltage 1.8Vout, 3.3Vout 10.0 Output Current [mA] 5Vout 5.5 10 15 36 Input Voltage [VDC] Output Voltage Trimming Trim Radj Radj (kW) Vout Open 1.8V 8 3.3V 3.75 5.0V -Vout REGULATIONS Parameter Condition Value Output Voltage Accuracy 100% load ±2.0% typ. Line Voltage Regulation low line to high line, full load 0.2% typ. / 0.5% max.
PAGE 3
R420-1.8/PL DC/DC Converter Series Specifications (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up) Derating Graph 100 90 Output Load [%] 80 70 60 50 40 30 20 10 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 105 Ambient Temperature [°C] SAFETY AND CERTIFICATIONS Certificate Type Report / File Number Information Technology Equipment - General Requirments for Safety L0339m12-A-L EAC RU-AT.49.
PAGE 4
R420-1.8/PL DC/DC Converter Series Specifications (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up) INSTALLATION and APPLICATION Solar Application 3.3V +Vout +Vin Vpri Vout Vsec Auto-Switch Solar Panel 12-24V 3V Coin Cell R420-1.8/PL Status 0V ICL7673 -Vin GND Trim -Vout 8kΩ Solar-powered regulated 3.3V supply with automatic switch-over to 3V battery back-up. Sensor Application C2 IC1 +Vin IC2 + - +Vout R420- Trim 1.
PAGE 5
R420-1.8/PL DC/DC Converter Series Specifications (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up) PACKAGING INFORMATION Packaging Dimension (LxWxH) Packaging Quantity tray (carton) tape and reel (carton) reel tray tape and reel Tape and Reel Width 44mm Storage Termperature Range Storage Humidity 260.0 x 205.0 x 25.0mm 385.0 x 375.0 x 70.0mm 330.0 x 330.0 x 50.0mm 40pcs 400pcs -55°C to +125°C non-condensing 95%, RH max.