MSK5045-3.3H Datasheet, PDF (1/9 Pages) M.S. Kennedy Corporation – HIGH EFFICIENCY, HIGH VOLTAGE 4 AMP SURFACE MOUNT SWITCHING REGULATORS

MIL-PRF-38534 CERTIFIED
5045 HIGH EFFICIENCY, HIGH VOLTAGE
4 AMP SURFACE MOUNT
M.S.KENNEDY CORP.
SWITCHING REGULATORS
SERIES
4707 Dey Road Liverpool, N.Y. 13088
[phone]
FEATURES:
Up To 88% Efficiency For 5V Version
4 Amp Output Current
1.2 x VOUT to 80V Input Range with Separate Bias
12V to 80V Input Range with UVLO (VBias=VIN)
Preset 2.5V, 3.3V or 5.0V Output Versions
300KHz Switching Frequency @ 1 Amp
User Programmable Soft-Start
User Programmable Current Limit
Hermetic Package
-55°C to +125°C Operating Temperature Range
Available with Gull Wing Leads
Contact MSK for MIL-PRF-38534 Qualification Status
DESCRIPTION:
The MSK 5045 series are high efficiency, 4 amp, surface mount switching regulators. The output voltage is config-
ured for 2.5V, 3.3V or 5.0V internally with a tolerance of 1% at 1.5 amps. The operating frequency of the MSK 5045
is 300KHz. An external "soft start" capacitor allows the user to control how quickly the output comes up to regulation
voltage after the application of an input. A low quiescent current and greater than 85% operating efficiency keep the
total internal power dissipation of the MSK 5045 down to an absolute minimum. The input circuitry has been designed
to withstand a very wide range of voltages from less than 12V to as high as 80V. The device is packaged in a hermetic
kovar flatpack for high reliability applications, and is available screened to MIL-PRF-38534 Class H.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
Step-down Switching Regulator
Microprocessor Power Source
High Efficiency Low Voltage
Subsystem Power Supply
PIN-OUT INFORMATION
1 Case
34-44 VOUT
2 Sense High 23-33 Ground
3 Sense Low 12-22 VIN
4 NC
11 VBias
5 RFB
10 Enable
6 NC
9 NC
7 PWR SAVE
8 CTON
1
Rev. G 2/06