RECOM R-78AA33-10SMD Datasheet

INNOLINE

DC/DC-Converter

with 3 year Warranty

R-78AA-1.0

www.recom-international.com I-15REV: 0/2014

EN-60950-1 Certified

RoHS

2011/65/EU

6/6

1.0 AMP
SMD
Single Output

Features

Selection Guide

Part Input Output Adjust Output Efficiency
Number Range Voltage Range Current Min. Vin Max. Vin
SMD (V) (V) (V) (A) (%) (%)

R-78AA1.5-1.0SMD 4.75 – 18 1.5 fixed 1.0 77 73

R-78AA1.8-1.0SMD 4.75 – 18 1.8 1.5~3.0 1.0 82 76

R-78AA2.5-1.0SMD 4.75 – 18 2.5 1.5~3.0 1.0 87 81

R-78AA3.3-1.0SMD 4.75 – 18 3.3 3.0~5.5 1.0 90 84

R-78AA5.0-1.0SMD 6.5 – 18 5.0 3.0~5.5 1.0 94 89

Characteristics Conditions Min. Typ. Max.

Input Voltage Range See Table 4.75V 18.0V

Output Voltage Range See Table 1.5V 5.5V

Output Current All Series 0mA* 1000mA

Output Current Limit All Series 5500mA

Short Circuit Input Current Vin = 12V 120mA

Internal Power Dissipation 0.4W

Short Circuit Protection Continuous, automatic recovery

Output Voltage Accuracy 100% Load ±2% ±3%

Adjustable Voltage Range See Table 1 ±50%

Line Voltage Regulation (Vin = min to max at full load) 0.2% 0.4%

Load Regulation (10% to 100% full load) 0.7% 1.0%

Dynamic Load Stability 100%<>50% load, 25mA/µs ±85mV ±100mV

Ripple & Noise (20MHz BW) 20mVp-p 30mVp-p

Temperature Coefficient -40°C~+85°C ambient 0.015%/°C

Max capacitance Load with normal start-up time, no external components 470µF

with <1 second start up time + diode protection circuit 6800µF

Switching Frequency 335kHz 385kHz 435kHz

Quiescent Current Vin = min. to max. at 0% load 5mA 7mA

ON/OFF Remote Control Pin Drive Current ON: Open or 1.6V<Vr<5V

OFF: GND or 0<Vr<1.6V Ir=1.8µA typ

Converter Input Current (valid for Vr < 1.6V) 20µA 35µA

Remote On/Off Threshold Voltage (Vr rising) 2.4V 2.6V 2.8V

Remote On/Off Voltage Hysteresis 250mV

Operating Temperature Range -40°C +85°C

Switch On/Off Time (using Remote On/Off Control) 50ms

Operating Case Temperature +100°C

Storage Temperature Range -55°C +125°C

Case Thermal Impendance 70°C / W

Thermal Shutdown Internal IC junction +160°C

continued on next page

Specifications

( typical at 25°C, 10% minimum load, unless otherwise specified )

Description

Output Power (%)

120

100

20

60

100750

-40

Operating Temperature (°C)

0

80

5025

60

Safe Operating Area

85

40

30

Derating-Graph

(Ambient Temperature)

●

Replacement for R-78Axx-1.0SMD series

● RoHS 6/6 Conform (100% Lead Free)

●

High Reflow Temperature SMD Package

● Adjustable Output Voltage

● Short circuit protection, Thermal shutdown

● Remote On/Off Control

● Very Low Shutdown Current

The R-78AAxx-1.0SMD series are manufactured without lead and meet the requirements for RoHS 6/6 as well as
the increased reflow soldering temperatures associated with vapour phase soldering, making these high efficiency
switching regulators ideally suited to modern pick-and-place mass production. The efficiency of up to 94% means
that very little energy is wasted as heat. The additional features of remote on/off control and adjustable output volta­ges will find many uses in the battery-powered, industrial, medical and automotive markets.

I-16 www.recom-power.comREV: 0/2014

R-78AA-1.0

Efficiency (%)

80

5

Efficiency Vs

Vin (Full Load)

Vo=1.8V

Vo=2.5V

Vo=5V
Vo=3.3V

70

Vin ( V )

10

15

18

90

100

Vo=1.5V

60

Efficiency (%)

100

0.2

Efficiency Vs

Load ( Vin=Max )

Vo=1.8V

Vo=3.3V

Vo=5V

Vo=2.5V

50

Output Current ( A )

0.4

0.6

0.8

1.0

1.2

70

25

Vo=1.5V

80

90

60

Efficiency (%)

100

0.2

Efficiency Vs

Load ( Vin=Min )

Vo=1.8V

Vo=3.3V

Vo=5V

Vo=2.5V

Output Current ( A )

0.4

0.6

0.8

1.0

1.2

50

70

25

80

90

60

Vo=1.5V

Ripple (mV)

50

5

Ripple Vs

Vin ( Full Load )

Vo=1.8V

Vo=2.5V

Vo=5V

Vo=3.3V

25

Vin ( V )

10

15

18

Vo=1.5V

Ripple (mV)

50

0.2

Ripple Vs

Load ( Vin=Max )

Vo=1.8V

Vo=2.5V

Vo=5V

Vo=3.3V

25

Output Current ( A )

0.4

0.6

0.8

1.0

1.2

Vo=1.5V

Ripple (mV)

50

0.2

Ripple Vs

Load ( Vin=Min )

Vo=1.8V

Vo=2.5V

Vo=5V
Vo=3.3V

25

Output Current ( A )

0.4

0.6

0.8

1.0

1.2

Vo=1.5V

Efficiency

Ripple

Characteristics

*Note: Operation under no load will not damage these devices, however they may not meet all specifications. A minimum load of 10mA is recommended

Specifications

( typical at 25°C, 10% minimum load, unless otherwise specified )

Case Material Non-Conductive Black Plastic

Potting Material Epoxy (UL94V-0)
EMC Conducted Emissions (with filter) EN55022 Class B

Radiated Emissions (with filter) EN55022 Class B
ESD EN61000-4-2 Class A
Radiated Immunity EN61000-4-3 Class A
Fast Transient EN61000-4-4 Class A
Conducted Immunity EN61000-4-6 Class A
Magnetic Field Immunity EN61000-4-8 Class A

Safety Certification Report: SPCLVD 1301026-1 EN-60950-1:2006 + A12:2011

Package Weight 1.7g

Packing Quantity 33 pcs per Tube

250 pcs per Reel

MTBF (+25°C) 13338~21070 x 10³ hours

. (+71°C) using MIL-HDBK 217F 3880~6769 x 10³ hours

}

Detailed Information see
Application Notes chapter "MTBF"

INNOLINE

DC/DC-Converter

R-78AAxx-1.0 SMD
Series

R-78AA-1.0

www.recom-international.com I-17REV: 0/2014

Application Examples

INNOLINE

DC/DC-Converter

+Vin

-Vin

R-78A3.3-1.0SMD

Vout = 3.3V
or 5.0V @ 1A

Com

6.8kW

On/Off

3.3V/5V Selectable 1A Power Supply

3.3V/5V
Select
(TTL)

4.7k

W

R-78AAxx-1.0 SMD
Series

R-78Axx-1.0 SMD

-Vout

+Vout

+Vin

-Vin

1,2

10

3,7,8,9

6

4,5

R1

R2

On/Off

Standard Application Circuit

Optional Protection Circuit

R-78A(A)xx

-xxxSMD

-Vout

+Vout

+Vin

-Vin

Diode

Trim output voltage
up 1 diode drop

CTRL

Add a blocking diode to Vout
if current can flow back­wards into the output, as this
can damage the converter
when it is powered down.

The diode can either be fitted
across the device if the
source is low impedance or
fitted in series with the out­put (recommended)

.

-Vout

+Vout

+Vin

-Vin

R-78A(A)xx

-xxxSMD

CTRL

Optional Protection 1:

Optional Protection 2:

R-78xx-xx

-Vout

+Vout

+Vin

-Vin

6800µF

Application example:
Driving a high capacitive load

I-18 www.recom-power.comREV: 0/2014

R-78AA-1.0

Package Style and Pinning (mm)

Table 1: Adjustment Resistor Values

INNOLINE

DC/DC-Converter

R-78AAxx-1.0 SMD
Series

12.35

Bottom View

0.55

Top View

15.30

8.80

15.00

2.54x4

9.24

10 7

2

4

5

11.00

9.40

9.60

RECOM

R-78Axx-0.5SMD

xxxx

1

2.54

13.00

1.80

10 7

2415

1.30

1.20

3

68

9

3

6

89

SMD 10Pin Package

Pin Connections

Pin #

1,2 +Vin
3,7,8,9 GND
4,5 +Vout
6 V adj
10 Remote On/Off

xx.x ±0.5mm
xx.xx ±0.25mm

Recommended Footprint Details

Rdown

Rup

Vadj

+Vo

-Vo

R3

R1

R2

+Vin

-Vin

Controlled IC

Vref

R1 R2 R3 Vref(V)

1.8V 10KΩ 21KΩ 5.6KΩ 1.23

2.5V 22KΩ 21KΩ 5.6KΩ 1.23

3.3V 16.9KΩ 10KΩ 5.6KΩ 1.23

5.0V 30.9KΩ 10KΩ 10KΩ 1.23

R2(R1+R3) x (Vref - Vo) + Vref x (R1 + R3)

Trim Down R

down

=

R

2Vo - Vref (R1 + R2)

R2R3 (Vref - Vo) + Vref R1 (R2 + R3)

Trim up R

up =

R

2 (Vo - Vref) - Vref R1

The product information and specifications are subject to change without prior notice. All products are designed for non-safety critical commercial and industrial applications.

The Buyer agrees to implement safeguards that anticipate the consequences of any failures that might cause harm, loss of life and/or damage property.