Datasheet

FUNCTIONAL SPECIFICATIONS ➀
UCH-1.8/40-D48 UCH-2.5/40-D48 UCH-3.3/10-D24 UCH-3.3/10-D48 UCH-3.3/15-D48 UCH-3.3/35-D24 UCH-3.3/30-D48
Input
Input voltage range See ordering guide
Start-up threshold, Volts 34 34 16 34 34 16 34
Undervoltage
shutdown, V
32 31 15 31 31 15 31
Overvoltage shutdown none
Refl ected (back) ripple cur-
rent, mA pk-pk
10 20 10 15 15 15 10
Input Current
Full load conditions See ordering guide.
Inrush transient, A
2
sec 0.05
Output short circuit, mA 50
Low line (VIN = min.), Amps 2.30 1.54 2.06 1.03 1.54 7.21 3.09
Standby mode, mA
(Off, UV, OT shutdown)
210 8
Internal input fi lter type Pi L-C
External recommended fast
blow fuse, Amps
10 3 5 3 3 12.5 7.5
Reverse polarity
protection
None. Install external fuse.
Remote On/Off Control
Positive logic
(P model suffi x)
OFF = Ground pin to +1V max.
ON = Open or +3.5 to +13.5V max
Negative logic
(N model suffi x)
OFF = Open or +2.5V to +15V max.
ON = –0.1V to +0.8V max
Current, mA 1
Output
Voltage output range See ordering guide.
Voltage output accuracy ±1% of VNOM (50% load)
Adjustment range –10 to +10% of VNOM.
Temperature coeffi cient
over oper. temp. range
±0.02% of V
OUT range per °C
Minimum loading No minimum loading.
Remote sense
compensation
+10%.
Ripple/noise
(20 MHz bandwidth)
See ordering guide.
Line/Load regulation See ordering guide.
Effi ciency See ordering guide.
Maximum capacitive loading,
Low ESR <0.02 max.,
resistive load, F
10,000 max.
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Single Output UCH Models
Isolated, “Half-Brick”
1.8−15V Output DC/DC Converters
MDC_UCH Models.C01 Page 3 of 18