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| 型号： | 7812SRH-C |
| 厂商： | MURATA POWER SOLUTIONS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 4.8 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, TO-220, SIP-3 |
| 文件页数： | 2/6页 |
| 文件大小： | 435K |
| 代理商： | 7812SRH-C |
78xxSR Series
3.3V/5V/12V Outputs High-Efciency
Switching Regulators with LM78xx Pinouts
www.murata-ps.com/dpm
email: sales@murata-ps.com
05 Apr 2011
MDC_78xxSR Series.B06 Page 2 of 6
TECHNICAL NOTES (continued)
6.
Soldering & Handling Precautions: All units are designed to be hand
soldered to pc-boards using no-clean solders (+260°C, 5 seconds max.).
Water-soluble solders can also be used, but the units must be washed
and dried using processes appropriate to the type of solder employed.
See the Mechanical Specications section for pin 1 orientation and
recommended plated-through hole dimensions.
While 78SR regulators easily withstand a 2kV ESD discharge to any ter-
minal (using human body model), they should always be treated as ESD
sensitive devices.
7.
Horizontal-Pin Models (78XXSRH-C): 78XXSRH-C switching regulators
are pin-compatible replacements for TO-220 style LM78XX linear regula-
tors that are installed with their metal tabs lying at on the surface of the
pc-board. However, because the surface of inductor L1 on 78XXSRH-C
models is electrically conductive, it must not be allowed to come in con-
tact with any exposed pc-board traces, other than power ground (GND).
While the 2-mil-thick (0.05mm) polyester label attached to L1 provides
some degree of electrical insulation (only if L1 sits perfectly at on the
pc-board), it is recommended that a 0.020” (0.5mm) clearance be main-
tained between L1 and all exposed pc-board traces.
8.
Dropout Voltage: 78SR series regulators described in this data sheet
specify a minimum input voltage at which full-load accuracy and output
regulation are guaranteed (7.5V for 7803SR-C and 7805SR-C, and 15.0V
for 7812SR-C). However, these devices will stay in regulation at lower
input voltages if they are operated at less than their rated loads.
The following dropout-voltage data, derived from sample testing
performed at an ambient temperature of +25°C with resistive loads,
should be used for information purposes only. For these tests, a unit was
considered to be out of regulation when its output changed by more
+/–0.005Vdc from its nominal value. All voltages were measured directly
at the regulator’s I/O pins.
Input/Output
Models
7803SR-C
7805SR-C
7812SR-C
Output Voltage
+3.3Vdc
+5.0Vdc
+12.0Vdc
Rated Output Current
0.5A
0.4A
Output Voltage Accuracy
±2%
Input Voltage Range
+7.5-36Vdc
+15-36Vdc
Line Regulation (100% load)
±0.3%
Load Regulation (0-100% load)
±0.2%
Quiescent Current
3mA typ., 5mA max.
Input Current
See Performance Curves
Efciency
See Performance Curves
Transient Response
See Performance Curves
Input & Output Noise
See Performance Curves
Short Circuit Protection
Continuous
Isolation
None
Overvoltage Protection
None
Undervoltage Protection
None
Environmental
Models
7803SR-C
7805SR-C
7812SR-C
Operating Temperature
–40 to +70°C
Storage Temperature
–40 to +85°C
Cooling
Free Air Convection
Humidity (Non-condensing)
0 to 85%
Physical
Mechanical
See Mechanical Specications
Package
Open-frame SIP
Pins
0.025” (0.64mm) square,
tin-plated bronze
Weight
0.08 ounces (2.2g)
Pin Soldering
+260°C for 5 seconds
See Technical Note 5.
While these regulators can withstand a continuous short-circuit across their
output terminals, they will experience a signicant temperature rise. Extended
short-circuit operation will adversely affect the unit’s reliability.
0% Load
25% Load
50% Load
100% Load
7803SR-C
6.0V
6.2V
6.3V
7805SR-C
6.3V
6.2V
6.8V
7812SR-C
12.8V
13.0V
12.8V
13.0V
Performance/Functional Specications
Typical at TA = +25°C
Typical Dropout Voltage
相关PDF资料 |
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| 7803SR-C | 1-OUTPUT 1.65 W DC-DC REG PWR SUPPLY MODULE |
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