7803SR-C

更新时间： 2024-11-11 06:32:07

品牌	Logo	应用领域
村田 - MURATA		开关
页数	文件大小	规格书
6页	399K
描述
3.3V/5V/12V Outputs High-Effi ciency Switching Regulators with LM78xx Pinouts

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7803SR-C 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SFM
包装说明：	,	针数：	3
Reach Compliance Code：	compliant	ECCN代码：	EAR99
风险等级：	1.98	模拟集成电路 - 其他类型：	DC-DC REGULATED POWER SUPPLY MODULE
最大输入电压：	36 V	最小输入电压：	7.5 V
标称输入电压：	12 V	JESD-30 代码：	R-XSMA-T3
JESD-609代码：	e3	最大负载调整率：	0.2%
功能数量：	1	输出次数：	1
端子数量：	3	最大输出电压：	3.366 V
最小输出电压：	3.234 V	标称输出电压：	3.3 V
封装主体材料：	UNSPECIFIED	封装形状：	RECTANGULAR
封装形式：	MICROELECTRONIC ASSEMBLY	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	表面贴装：	NO
技术：	HYBRID	端子面层：	Tin (Sn)
端子形式：	THROUGH-HOLE	端子位置：	SINGLE
处于峰值回流温度下的最长时间：	NOT SPECIFIED	最大总功率输出：	1.65 W
微调/可调输出：	NO	Base Number Matches：	1

7803SR-C 数据手册

78xxSR Series

www.murata-ps.com

3.3V/5V/12V Outputs High-Efﬁciency

Switching Regulators with LM78xx Pinouts

Murata Power Solutions’ 7805SR-C (5V output), 7812SR-C (12V output) and 7803SR-C

(3.3V output) step-down switching regulators are modern drop-in replacements for older,

inefﬁcient, LM7805 and LM7812 linear regulators. The 78XXSR's are pin- and size-compat-

ible with industry-standard TO-220 SIP packages. A 260kHz switching frequency provides

for efﬁciencies as high as 95%. Full-load (up to 0.5A) operation from 9V, 12V, 24V, or 36V

supplies at ambient temperatures up to +70°C requires no heat sinks, no temperature

derating, no forced-air cooling, and no external capacitors.

78SR switching regulators provide many signiﬁcant improvements over their linear

counterparts: lower quiescent current (3mA vs. 5 mA), higher input voltage (40V vs. 32V),

and better output accuracy ( 1.5% vs. 5%). All these features combine to make 78SR

regulators ideal for new or existing LM7805 & LM7812 applications requiring full-load

operation at elevated voltages.

FEATURES

ꢀ

3.3V/0.5A, 5V/0.5A or 12V/0.4A outputs; Pin and

size-compatible with LM7805 & LM7812 regulators

ꢀ

Up to 95% efﬁciency–no heat sinks or thermal

derating required

ꢀ

Two SIP-packages ﬁt existing TO-220 footprints:

- Vertical-pin models occupy less than 0.1 square in.

- Optional horizontal pins provide 0.350 in. installed

height

ꢀ

+7.5-36Vdc operating input range; Low 3mA

quiescent current

ꢀ

Built-in ﬁlter capacitors–no external components

required

TECHNICAL NOTES

1. Input/Output (I/O) Filtering: As shown in the noise and ripple graphs, 78SR switching

regulators exhibit excellent low-noise performance with no external I/O capacitors.

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 system voltages and temperatures. Adding external output capacitors will also

improve the unit’s load-transient response.

ꢀ

–40 to +70°C operation at full load; Short-circuit

protection

Excellent load ( 0.2%) and line ( 0.3%) regulation

ꢀ

Ideal for powering instrumentation from

9V/12V/24V/28V supplies or batteries

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 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 Efﬁciency Curves as a

guide to selecting an appropriate slow-blow fuse.

ꢀ

Can be used with unregulated dc supplies

protection

Ordering Information

3. Input-Output Isolation: 78SR regulators’ internal input and output circuits share a

common connection (GND, pin 2); there is no electrical isolation between the INPUT

(pin 1) and OUTPUT (pin 3) terminals.

4. Overvoltage Protection: 78SR switching regulators do not provide input or output

overvoltage protection. In the extremely rare situation in which a catastrophic failure

occurs, the output voltage may rise to excessively high levels. If your load must be

protected against all possible overvoltage situations, external voltage-limiting circuitry

must be provided.

5. Operation at 40Vdc: Operating with inputs up to 40Vdc is permissible if, for inputs

between 36 and 40Vdc, the maximum load current is reduced to 0.35A for 7805SR-C

and 7803SR-C, and to 0.3A for 7812SR-C. Under no circumstances should the input

voltage be allowed to exceed 45Vdc.

MPS Part No.

Output

Voltage

Output Input

Current Voltage

Standard Pin Package

7803SR-C

7805SR-C

+3.3Vdc

+5.0Vdc

0.5A

+7.5-36Vdc

+15-36Vdc

7812SR-C

+12.0Vdc 0.4A

Horizontal Pin Package

7803SRH-C

7805SRH-C

7812SRH-C

+3.3Vdc

+5.0Vdc

0.5A

+7.5-36Vdc

+15-36Vdc

+12.0Vdc 0.4A

For full details go to

www.murata-ps.com/rohs

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_78xxSR Series.B03 Page 1 of 6

12 3 4 5 6

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与7803SR-C相关器件

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7803SRH	MURATA	获取价格	DC-DC Regulated Power Supply Module, 1 Output, Hybrid
7803SRH-C	MURATA	获取价格	3.3V/5V/12V Outputs High-Effi ciency Switching Regulators with LM78xx Pinouts
7803SRH-C		获取价格	3.3V/5V/12V Outputs High-Effi ciency Switching Regulators with LM78xx Pinouts
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