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参数资料
| 型号： | LSN2-T/22-D12 |
| 厂商： | MURATA POWER SOLUTIONS INC |
| 元件分类： | 电源模块 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 封装： | SIP-8 |
| 文件页数： | 7/13页 |
| 文件大小： | 1173K |
| 代理商： | LSN2-T/22-D12 |
LSN2-T/22-D12
Non-isolated, DOSA-SIP,
22A Selectable-Output DC/DC Converters
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
MDC_LSN2-T/22-D12_B02 Page 3 of 13
Performance/Functional Specifications (1)
INPUT
Input Voltage Range
See Ordering Guide
Isolation
Not isolated, input and output commons
are internally connected
Start-Up Threshold
8.1 Volts
Undervoltage Shutdown
7.5 Volts
Overvoltage Shutdown
None
Reflected (Back) Ripple Current (2)
20mAp-p
Internal Input Filter Type
Capacitive
Reverse Polarity Protection
See fuse information
Recommended External Fuse
25 Amps
Input Current:
Full Load Conditions
See Ordering Guide
Inrush Transient
0.4A2sec
Shutdown Mode (Off, UV, OT)
5mA
Output Short Circuit
60mA
No Load
100mA, 5VOUT
Low Line (VIN = VMIN)
12.62 Amps
Remote On/Off Control: (5)
Positive Logic (no model suffix)
OFF = ground pin to +0.3V max.
ON = open pin or +2.5V min. to +VIN max.
Negative Logic (“N” model suffix)
ON = 0 to +0.3V max.
OFF = open pin or +2.5V min. to +VIN max.
Current
1mA max.
OUTPUT
Voltage Output Range
See Ordering Guide
Minimum Loading
No minimum load
Accuracy (50% load)
±2% of VNOM
Voltage Adjustment Range (13)
See Ordering Guide
Temperature Coefficient
±0.02% of VOUT range per °C
Ripple/Noise (20 MHz bandwidth)
See Ordering Guide and (8)
Line/Load Regulation (See Tech Notes)
See Ordering Guide and (10)
Efficiency
See Ordering Guide
Maximum Capacitive Loading: (15)
Cap-ESR = 0.001 to 0.01
W
2000F
Cap-ESR >0.01
W
10,000F
Current Limit Inception: (98% of VOUT)
45 Amps (cold startup)
43 Amps (after warm up)
Short Circuit Mode (6)
Short Circuit Current Output
600mA
Protection Method (17)
Hiccup autorecovery on overload removal
Short Circuit Duration
Continuous, no damage (output shorted
to ground)
Prebias Startup (16)
Converter will start up if the external
output voltage is less than VSET
Sequencing (Omit “B” model suffix)
Slew Rate
2V max. per millisecond
Startup delay until sequence start
10 milliseconds
Tracking accuracy, rising input
VOUT = ±200mV max. of Sequence In
Tracking accuracy, falling input
VOUT = ±400mV max. of Sequence In
Sequence pin input impedance
1M
W
Remote Sense to VOUT
0.5V max. (7)
Power Good Output (14)
TRUE (OK) = open drain
(“G” suffix)
FALSE (not OK) = Signal Ground to 0.4V
Power_Good Configuration
MOSFET to ground with external user
pullup, 10mA max. sink
DYNAMIC CHARACTERISTICS
Dynamic Load Response
40sec to ±2% of final value
(50-100-50% load step, di/dt = 20A/sec)
Start-Up Time
7msec for VOUT = nominal
(VIN on to VOUT regulated or On/Off to VOUT)
Switching Frequency
250 ±30kHz
ENVIRONMENTAL
Calculated MTBF (4)
TBC Hours
Operating Temperature Range
–40 to +85°C with derating
See Derating Curves
Operating PC Board Temperature
–40 to +100°C max. (12)
Storage Temperature Range
–55 to +125°C
Thermal Protection/Shutdown
+115°C
Relative Humidity
To 85°C/85% RH, non-condensing
PHYSICAL
Outline Dimensions
See Mechanical Specifications
Weight
0.28 ounces (7.8 grams)
Pin Material
Tin plate over copper alloy
Electromagnetic Interference
FCC part 15, class B, EN55022 (may
(conducted and radiated)
need external filter)
Safety
UL/cUL 60950-1 CSA-C22.2 No.60950-1
IEC/EN 60950-1
Flammability Rating
UL94V-0
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous or transient)
+15 Volts
On/Off Control
–0V min. to +VIN max.
Input Reverse Polarity Protection
See Fuse section
Output Current (7)
Current-limited. Devices can
withstand sustained short circuit
without damage.
Storage Temperature
–55 to +125°C
Lead Temperature (soldering 10 sec. max.) +280°C
These are stress ratings. Exposure of devices to any of these conditions may adversely affect
long-term reliability. Proper operation under conditions other than those listed in the Perfor-
mance/Functional Specifications Table is not implied.
Performance/Functional Specification Notes:
(1)
All models are tested and specified with external 1 || 10F ceramic/tantalum output capacitors
and a 22F external input capacitor. All capacitors are low ESR types. These capacitors are
necessary to accommodate our test equipment and may not be required to achieve specified
performance in your applications. All models are stable and regulate within spec under no-load
conditions.
General conditions for Specifications are +25°C, VIN = nominal, VOUT = nominal, full load. “Nomi-
nal” output voltage is +5V.
(2)
Input Back Ripple Current is tested and specified over a 5-20MHz bandwidth. Input filtering is
CIN = 2 x 100F tantalum, CBUS = 1000F electrolytic, LBUS = 1H.
(3)
Note that Maximum Power Derating curves indicate an average current at nominal input voltage.
At higher temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current
outputs if the total RMS current over time does not exceed the derating curve.
(4)
Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3,
ground fixed conditions, TPCBOARD = +25°C, full output load, natural air convection.
(5)
The On/Off Control may be driven with external logic or by applying appropriate external voltages
which are referenced to –Input Common. The On/Off Control Input should use either an open
collector/open drain transistor or logic gate which does not exceed +VIN. A 68K
W external pullup
resistor to +VIN will cause the “ON” state for negative logic models.
(6)
Short circuit shutdown begins when the output voltage under increasing load degrades approxi-
mately 2% from the selected setting.
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