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參數(shù)資料
| 型號： | 78SR-5/2-C |
| 廠商： | MURATA POWER SOLUTIONS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PSSO3 |
| 封裝： | ROHS COMPLIANT PACKAGE-3 |
| 文件頁數(shù)： | 1/5頁 |
| 文件大小： | 399K |
| 代理商： | 78SR-5/2-C |
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/dpm
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
78SR 2 Amp Series
2 Amp, 3.3V & 5V Output, High Efciency,
Synchronous Switching Regulators
MPM_78SR-2A_B02 Page 1 of 5
Datel’s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down,
switching regulators are ultra high-efciency, 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.
A 200KHz switching frequency, combined with a synchronous rectier buck regulator
topology, provides for efciencies 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 efcient 3-pin vertical mount SIP occupies less than
0.09in.2 (58mm2) of pc-board real estate, while a horizontal mount option has an installed
height of less than 0.290in. (7.4mm).
78SR Series 2A switching regulators are lower cost, improved-efciency upgrades for
many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher efciency ensures
signicantly lower heat generation and provides increased run time in battery-powered
applications, making these regulators ideal for today’s low power “green” applications.
FEATURES
■ Up to 95% efciency– 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:
3-pin vertical mount SIP
Low prole, horizontal mount SIP
■ No external Input/Output 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
TECHNICAL NOTES
1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs,
78SR Series regulators exhibit excellent low noise performance with no additional I/O 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.
2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or
output terminals is required, use the data shown in the Efciency Curves as a guide to
select an appropriate slow-blow fuse.
Part No.
Output
Input
Voltage
Current
Voltage
78SR-3.3/2-C
3.3Vdc
2.0A
8.0-32Vdc
78SR-5/2-C
5.0Vdc
2.0A
8.0-32Vdc
78SRH-3.3/2-C
3.3Vdc
2.0A
8.0-32Vdc
78SRH-5/2-C
5.0Vdc
2.0A
8.0-32Vdc
Ordering Information
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 78SRH-5/2-C | 2 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PSSO3 |
| 78SRH-3.3/2-C | 2 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PSSO3 |
| 78SR110SC | SWITCHING REGULATOR, PDSO5 |
| 78SR153VC | SWITCHING REGULATOR, SIP3 |
| 78SR114SC | SWITCHING REGULATOR, PDSO5 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 78SR5K | 制造商:TT Electronics / BI Technologies 功能描述:Res Cermet Trimmer 5K Ohm 10% 1W 22(Elec)Turn 2.79mm (33.53 X 4.95 X 8.13mm) J-Hook Box |
| 78SR5KLF | 制造商:TT Electronics / BI Technologies 功能描述:Res Cermet Trimmer 5K Ohm 10% 1W 22(Elec)Turn 2.79mm (33.53 X 4.95 X 8.13mm) J-Hook Box |
| 78SRH-3.3/2-C | 功能描述:DC/DC轉(zhuǎn)換器 8-32Vin 3.3Vout 2A HSIP Switching Reg. RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| 78SRH-5.2/2-C | 功能描述:DC DC CONVERTER 5.25V 制造商:murata power solutions inc. 系列:78SR 2 AMP 零件狀態(tài):在售 類型:線性穩(wěn)壓器替代品 輸出數(shù):1 電壓 - 輸入（最小值）:8V 電壓 - 輸入（最大值）:32V 電壓 - 輸出 1:5.25V 電壓 - 輸出 2:- 電壓 - 輸出 3:- 電壓 - 輸出 4:- 電流 - 輸出（最大值）:2A 應(yīng)用:ITE（商業(yè)） 特性:- 工作溫度:-40°C ~ 70°C 效率:- 安裝類型:通孔 封裝/外殼:3-SIP 模塊 大小/尺寸:0.85" 長 x 0.80" 寬 x 0.28" 高（21.6mm x 20.3mm x 7.1mm） 供應(yīng)商器件封裝:模塊 標(biāo)準(zhǔn)包裝:144 |
| 78SRH-5/2-C | 功能描述:DC/DC轉(zhuǎn)換器 8-32Vin 5Vout 2A HSIP Switching Reg. RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
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