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參數(shù)資料
| 型號(hào)： | 78SRH-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(yè)數(shù)： | 2/5頁(yè) |
| 文件大?。?/td> | 399K |
| 代理商： | 78SRH-5/2-C |
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com/dpm
78SR 2 Amp Series
2 Amp, 3.3V & 5V Output, High Efciency,
Synchronous Switching Regulators
MPM_78SR-2A_B02 Page 2 of 5
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 Specications 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 at 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 at and in contact with the pc-board’s surface.
Input/Output
Models
78SR-3.3/2
78SR-5/2
Output Voltage
3.3Vdc
5.0Vdc
Rated Output Current
2.0A
Output Voltage Accuracy
±2%
Input Voltage Range
8.0-32Vdc
Line Regulation (100% load)
±0.35%
Load Regulation (0-100% load)
±0.2%
Quiescent Current (mAdc)
25 typ., 30 max
20 typ., 35max
Input Current vs. Input Voltage
See Efciency Curves
Efciency
See Efciency Curves
Transient Response
See Performance Curves
Input & Output Noise
See Performance Curves
Output Short Circuit Protection
Continuous
Input/Output Isolation
None
Overvoltage Protection
None
Undervoltage Protection
None
Environmental
Models
78SR-3.3/2
78SR-5/2
Operating Temperature
–40 to +70°C
Storage Temperature
–40 to +85°C
Cooling
③
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
0.15 ounces (4.2g)
Pin Soldering
+260°C for 5 seconds
Absolute Maximum Ratings
Input Voltage:
+36Vdc
Operating Temperature
+85°C
Output Current
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 Specications Table is not
implied.
③ See derating chart for more information.
Performance/Functional Specications
Typical at TA = +25°C & VIN = 12V, unless otherwise noted
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