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REV.: 3/2019I-1

Features

Switching

Regulator

• Efficiency up to 96%, no need for heatsinks

• Pin-out compatible with LM78XX linears

• Low profile (L*W*H=11.6*8.5*10.4mm)

• Wide input range (5V - 42V)

• Short circuit protection, thermal shutdown

• Low ripple and noise

• IEC/EN60950 certified

• Positive to negative converter

R-78C-1.0

Description

The R-78Cxx-1.0 series switching regulators are ideally suited to replace 1 Amp 78xx linear regulators

and are pin compatible. Efficiencies of up to 96% means that very little energy is wasted as heat and

the high input voltage is a useful feature.

DC/DC Converter

1.0 Amp

SIP3

Single Output

IEC60950-1 certified

EN60950-1 certified

EN55032 compliant

Specifications (measured at Ta= 25°C, minimum load, otherwise specified)

BASIC CHARACTERISTICS

ParameterConditionMin.Max.Typ.

Input Voltage RangeVout +3V42VDC

Output Voltage Range1.8VDC15VDC

Minimum Load

(1)

0%

Quiescent Current1mA

Internal Operating Frequency280kHz350kHz420kHz

Output Ripple and Noise

(2)

20MHz BW

Vin= 24VDC Vout=1.8-15

full load

75mVp-p

30mVp-p

120mVp-p

Max. Capacitive Load

with normal start-up time, no external components

with <1 second start-up time + diode protection circuit

470µF

6800µF

Selection Guide

Part Input Output Output Efficiency

Number Voltage Range Voltage Current @ min Vin @ max. Vin

[VDC] [VDC] [A] [%] [%]

R-78C1.8-1.0 5 - 42 1.8 1.0 80 71

R-78C3.3-1.0 7 - 42 3.3 1.0 89 79

R-78C5.0-1.0 8 - 42 5 1.0 93 85

R-78C9.0-1.0 12 - 42 9 1.0 95 90

R-78C12-1.0 15 - 42 12 1.0 96 92

R-78C15-1.0 18 - 42 15 1.0 96 94

Notes:

Note1: No load operation will not damage these devices, however they may not meet all specifications

A minimum load of 10mA is required

Note2: Measurements are made with a 10µF MLCC across output. (low ESR)

REGULATIONS

ParameterConditionValue

Output Voltage Accuracy

full load±2% typ. / ±3% max.

Line Voltage Regulationmax. Vin, full load±0.2% typ.

Load Voltage Regulationmax. Vin. and 10% to 100% load±0.4% typ.

Transient Response

100% <-> 50% load

100% <-> 10% load

±75mV max.

±200mV max.

Model Numbering

Output VoltageOutput Current

R-78C__-1.0

Produktspecifikationer