UM3500 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – 40 Watts DC-DC Converters

UM3500 SERIES
40 Watts DC-DC Converters
♦ Synchronous-Rectifier Topology
♦ Remote On/Off Control
♦ Continuous Short Circuit Protection
♦ High Efficiency
♦ Non-Isolated
♦ Current Share Function
SPECIFICATIONS
All specifications are typical at nominal line, full load and
25°C unless otherwise noted.
Mespek Oy, PL103, 00701 Helsinki
Puh. [phone] Fax [phone]
E-mail: [e-mail]
http://www.mespek.com
NOTES:
1. Measure from high line to low line.
2. Measure from full load to 1/2 load.
3. Measured with 1uF ceramic cap. Connected to the
output pins.
4. Output Power
INPUT SPECIFICATIONS
Input Voltage Range, 5V … … … … … ..… … … … … 4.75-5.5V
12V … … … … … … .… … … … 10.4-13.6V
Input Filter … … … … … … … … … … … … ..… … … ... Capacitive
OUTPUT SPECIFICATIONS
Voltage Accuracy .… … … … … … … … … … … … .… ± 2 % max.
Transient Response(25% Step Load Change) … .. <500 S
Line Regulation¹ … ..… … … … … … … … … … … .. ±0.5% max.
Load Regulation² … … … … … … … … … … … ..… . ±0.7% max.
Ripple and Noise, 20MHz BW³ … … … … .… 75mV P-P max.
Temperature Coefficient … … … … … … .…±0.02%/°C max.
Short Circuit Protection .… … … … … … … ..… … Continuous
Automatic Recovery
GENERAL SPECIFICATIONS
Efficiency .… … … … … … … … … … … … … … ..… .… See Table
Switching Frequency … ..… … … … … … … … … .. 200KHz typ.
Operating Temperature Range⁴ … .… … .… -25°C to +100°C
Storage Temperature ....… .… … … … … … … -40°C to+105°C
Cooling … … … … … … … … … … ..… … … Free Air Convection
Dimensions … … … … … … … … .… … … ..… 2 x 1 x 0.4 inches
(50.8 x 25.4 x 10.2mm)
Case Material … … … ..… … … … Black-Coated Copper with
Non-Conductive Base
100%
Operating
Temperature
-25
50
100
(°C)
Maximum case temperature must not be exceeded 100°C.
5. UM3500 series can be used as parallel connection to
provide current share function. The current that each
converter delivers will thus be 1/N of the total current, if
there are N total converters in parallel. Limitations to this
scheme are dependent primarily on matching of the
resistances in the converter: mismatch in resistance
results in one converter delivering more current than
another. When using this current share function, Pin
1(SYNC) and Pin 3(PWM) must be connected to each
other or be floating if used as single unit.
REMOTE ON/OFF CONTROL
Logic Compatibility… … … … … .CMOS or Open Collector TTL
Converter ON.… … … … .… … … … >+2.5 VDC or Open Circuit
Converter OFF… … … … … … … … .<+0.8 VDC or Short Circuit
Control Common… … … … … ..… … .Referenced to Input Minus
UNIVERSAL
MICROELECTRONICS
3,27TH RD., TAICHUNG INDUSTRIAL PARK,
TAICHUNG, TAIWAN, R.O.C.
TEL: [phone] FAX: [phone]
UM3500
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