78SR-3.3/2-C Murata Power Solutions Inc, 78SR-3.3/2-C Datasheet

78SR-3.3/2-C

Manufacturer Part Number

78SR-3.3/2-C

Description

REGULATOR SW SYNC 3.3V 2A SIP

Manufacturer

Murata Power Solutions Inc

Series

78SRr

Type

Point of Load (POL) Non-Isolatedr

Datasheet

1.78SR-3.32-C.pdf (5 pages)

Specifications of 78SR-3.3/2-C

Output

3.3V

Number Of Outputs

Power (watts)

Mounting Type

Through Hole

Voltage - Input

8 ~ 32V

Package / Case

3-SIP Module

1st Output

3.3 VDC @ 2A

Size / Dimension

0.80" L x 0.33" W x 0.85" H (20.3mm x 8.4mm x 21.6mm)

Power (watts) - Rated

6.6W

Operating Temperature

-40°C ~ 70°C

Output Power

7 W

Input Voltage Range

8 V to 32 V

Output Voltage (channel 1)

3.3 V

Output Current (channel 1)

2 A

Product

Non-Isolated / POL

Input Voltage (nominal)

12 V

Package / Case Size

SIP

Output Type

Switching Regulator

Output Voltage

3.3 V

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

Other names

811-1118

Current page: 1 of 5
Download datasheet (400Kb)

FEATURES

■

Part No.

78SR-3.3/2-C

78SR-5/2-C

78SRH-3.3/2-C

78SRH-5/2-C

www.murata-ps.com

Ordering Information

Up to 95% efﬁ ciency– no costly heat sinks or fans

required

3.3V/2A & 5V/2A models; pin compatible with 1.5A 78xx

regulators

Wide 8– 32Vdc input voltage range

Two package options:

No external Input/Output ﬁ lter capacitors required

–40 to +70°C full load operation at 24Vin with no

derating

Excellent load (±0.25%) and line (±0.35%) regulation

Low-cost upgrade for 78HT2, 78SR1, 78ST1, and

PT5100 switchers

Open frame design minimizes self-heating & pc-board

footprint

Includes output short-circuit protection and thermal

shutdown

Low noise output for powering sensitive instrumentation

3-pin vertical mount SIP

Low proﬁ le, horizontal mount SIP

www.murata-ps.com/rohs

For full details go to

Output

Voltage

3.3Vdc

5.0Vdc

3.3Vdc

5.0Vdc

Output

Current

2.0A

Input

Voltage

8.0-32Vdc

www.murata-ps.com/dpm

switching regulators are ultra high-efﬁ ciency, modern replacements for LM78xx series

1.5Amp linear regulators. They are pin- and size-compatible, drop-in replacements for

TO-220 style, 3-pin SIP or modular packages which require heat sinks. And, to ensure the

lowest installed cost, no messy thermal grease, no mounting hardware and no external

components are required for full operation.

topology, provides for efﬁ ciencies exceeding 95%. 78SR switchers can easily drive 2A loads

from 12V or 24Vsupplies—at ambient temperatures up to +70°C—without heat sinks,

fans, or thermal derating. A thermally efﬁ cient 3-pin vertical mount SIP occupies less than

0.09in.

height of less than 0.290in. (7.4mm).

many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher efﬁ ciency ensures

signiﬁ cantly lower heat generation and provides increased run time in battery-powered

applications, making these regulators ideal for today’s low power “green” applications.

TECHNICAL NOTES

1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs,

2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or

78SR Series regulators exhibit excellent low noise performance with no additional I/O ﬁ lter

components. However, if additional noise reduction is required, be sure to use low ESR

capacitors that are rated for continuous operation (with an additional 20% safety margin)

at the highest input voltage and ambient temperatures. Adding external output capacitors

will improve the unit’s load-transient response.

Applications in which 78SR regulators are located more than 24 inches (61cm) from the

input power supply should include an external 47uF/50V (or greater) aluminum electrolytic

capacitor, connected as close as possible to the regulator’s +Vin and GND terminals (pins

1 and 2). An external input capacitor is particularly important if the input voltage is applied

to the regulator via a mechanical switch or relay. Contact bounce at turn-on can produce

large inductive current spikes, and these current spikes can generate potentially damaging

voltage transients at the regulator’s input terminals.

output terminals is required, use the data shown in the Efﬁ ciency Curves as a guide to

select an appropriate slow-blow fuse.

Datel’s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down,

A 200KHz switching frequency, combined with a synchronous rectiﬁ er buck regulator

78SR Series 2A switching regulators are lower cost, improved-efﬁ ciency upgrades for

(58mm

) of pc-board real estate, while a horizontal mount option has an installed

2 Amp, 3.3V & 5V Output, High Efﬁ ciency,

Synchronous Switching Regulators

Technical enquiries email: sales@murata-ps.com, tel:

78SR 2 Amp Series

MPM_78SR-2A_B02 Page 1 of 5

+1 508 339 3000

Related parts for 78SR-3.3/2-C

78SR-3.3/2-C Summary of contents

Page 1

... Open frame design minimizes self-heating & pc-board footprint ■ Includes output short-circuit protection and thermal shutdown ■ Low noise output for powering sensitive instrumentation Ordering Information Part No. Output Output Voltage Current 78SR-3.3/2-C 3.3Vdc 2.0A 78SR-5/2-C 5.0Vdc 2.0A 78SRH-3.3/2-C 3.3Vdc 2.0A 78SRH-5/2-C 5.0Vdc 2.0A 　 ...

Page 2

... Absolute Maximum Ratings ➁ Input Voltage: Operating Temperature Output Current ➀ 78SR Series regulators can withstand a continuous short-circuit across their output terminals. However, extended short-circuit operation will decrease the unit’s long-term reliability. ➁ These are stress ratings only; Exposure of devices to any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Speciﬁ ...

Page 3

... Amp Series Synchronous Switching Regulators = 2.0A 78SR-3.3/2 Vin = 24V 2.0A 78SR-5/2 Vin = 24V, I 78SR-3.3/2 100% to 10% Load Step 78SR-5/2 100% to 10% Load Step Technical enquiries email: sales@murata-ps.com, tel: MPM_78SR-2A_B02 Page 2.0A LOAD = 2.0A LOAD Vin = 12V Vin = 12V +1 508 339 3000 ...

Page 4

... Input Current 1.0 2.0A LOAD 0.8 0.6 1.0A LOAD 0.4 0.5A LOAD 0.2 0 INPUT VOLTAGE 78SR-3.3/2-C Efﬁ ciency 100% 95% 90% 85% Vin = 8V 80% Vin = 12V 75% Vin = 15V 70% Vin = 24V 65% Vin = 28V 60% Vin = 32V 55% 0.25 0.50 0.75 1.00 1.25 LOAD CURRENT (AMPS) Thermal Derating Curve 2 ...

Page 5

... Tokyo, Tel: 81-3-3779-1031, email: japan@murata-ps.com Kyoto, Tel: 81-75-955-7269, email: japan@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: MPM_78SR-2A_B02 Page 508 339 3000 ...

Related keywords

78SR-3.3/2-C datasheet
78SR-3.3/2-C data sheet
78SR-3.3/2-C pdf datasheet
78SR-3.3/2-C component
78SR-3.3/2-C part
78SR-3.3/2-C distributor
78SR-3.3/2-C RoHS
78SR-3.3/2-C datasheet download