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78SR-3.3 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Synchronous Switching Regulators - Murata

भाग संख्या 78SR-3.3
समारोह Synchronous Switching Regulators
मैन्युफैक्चरर्स Murata 
लोगो Murata लोगो 
पूर्व दर्शन
1 Page
		
<?=78SR-3.3?> डेटा पत्रक पीडीएफ

78SR-3.3 pdf
Performance/Functional Specifications
Typical at TA = +25°C & VIN = 12V, unless otherwise noted
Input/Output
Models
Output Voltage
Rated Output Current
Output Voltage Accuracy
Input Voltage Range ➀ ➁
Line Regulation (100% load)
Load Regulation (0-100% load)
Quiescent Current (mAdc)
Input Current vs. Input Voltage
Efficiency
Transient Response
Input & Output Noise
Output Short Circuit Protection
Input/Output Isolation
Overvoltage Protection
Undervoltage Protection
Environmental
Models
Operating Temperature
Storage Temperature
Cooling
Humidity (Non-condensing)
Physical
Mechanical
Package
Pins
Weight
Pin Soldering
78SR-3.3/2
78SR-5/2
3.3Vdc
5.0Vdc
2.0A 2.0A
±2% ±2%
8.0-32Vdc
8.0-32Vdc
±0.35%
±0.35%
±0.2%
±0.2%
25 typ., 30 max
20 typ., 35max
See Efficiency Curves
See Efficiency Curves
See Performance Curves
See Performance Curves
Continuous
None
None
None
78SR-3.3/2
78SR-5/2
–40 to +70°C
–40 to +85°C
Free Air Convection
0 to 85%
See Mechanical Specifications
Open-frame SIP
0.025” (0.64mm) square,
tin-plated bronze
0.15 ounces (4.2g)
+260°C for 5 seconds
Absolute Maximum Ratings
Input Voltage:
Operating Temperature
Output Current
+36Vdc
+85°C
3.0 Amps
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.
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 Specifications Table is not
implied.
See derating chart for more information.
78SR 2 Amp Series
2 Amp, 3.3V & 5V Output, High Efficiency,
Synchronous Switching Regulators
TECHNICAL NOTES (continued)
3. Input-Output Isolation: 78SR regulators’ internal input and output cir-
cuits share a common connection (GND, pin 2), there is no electrical
isolation between their 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
where a catastrophic failure occurs, the output voltage may rise to
excessively high levels. If the load circuit must be protected against
all possible overvoltage situations, voltage-limiting circuitry must be
provided externally.
5. Soldering & Handling Precautions: All units are designed to be hand
soldered to pc-boards, using lead-free no-clean solders (+260°C, 5
seconds max.). See the Mechanical Specifications section for pin 1
orientation and recommended pc-board hole dimensions.
78SR series regulators have limited built-in ESD protection; therefore
they should always be treated as ESD susceptible devices.
6. Horizontal-Pin Models (78SRH): 78SRH switching regulators are pin-
compatible replacements for TO-220 style LM78xx linear regulators
which are installed with their metal tabs or heat sinks laying flat on
the surface of the pc-board. In replacement applications, 78SRH units
must be soldered to the pc-board such that the insulating body of
diode D1 lies flat and in contact with the pc-board’s surface.
www.murata-ps.com/dpm
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MPM_78SR-2A_B02 Page 2 of 5

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अनुशंसा डेटापत्रक

भाग संख्याविवरणविनिर्माण
78SR-3.3Synchronous Switching RegulatorsMurata
Murata


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