LF100ESI Series
Lowest Cost, Single Output
1W High Isolation SMT
DC/DC Converters New Budget Saver!!
Electrical Specifications
Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice.
Input
Key Features:
Parameter Conditions Min. Typ. Max. Units
1W Output Power
3.3 VDC Input 3.0 3.3 3.6
Ultra-Miniature SMT Case
Input Voltage Range 5 VDC Input 4.5 5.0 5.5 VDC
Single Output 12 VDC Input 10.8 12.0 13.2
Low 0.24" Profile Reverse Polarity Input Current 1.0 A
3,000 VDC Isolation Input Filter Capacitor
>1 MHour MTBF Output
3.3, 5V, & 12V Inputs Parameter Conditions Min. Typ. Max. Units
LOWEST COST! Output Voltage Accuracy ±3.0 %
Line Regulation For Vin Change of 1% ±1.2 %
Load Regulation See Model Selection Guide
Ripple & Noise (20 MHz) 75 150 mV P - P
Temperature Coefficient ±0.01 ±0.02 %/ºC
Output Short Circuit Momentary (0.5 Sec.)
General
Parameter Conditions Min. Typ. Max. Units
Isolation Voltage 60 Seconds 3,000 VDC
Isolation Resistance 500 VDC 1,000 M
Isolation Capacitance 100 kHz, 1V 70 pF
Switching Frequency 80 100 200 kHz
Environmental
Parameter Conditions Min. Typ. Max. Units
Operating Temperature Range Ambient -40 +25 +85 ºC
Operating Temperature Range Case -25 +25 +90 ºC
Storage Temperature Range -55 +125 ºC
Cooling Free Air Convection
Humidity RH, Non-condensing 95 %
Physical
Case Size 0.60 x 0.29 x 0.24 Inches (15.24 x 7.5 x 6.0 mm)
Case Material Non-Conductive Black Plastic (UL94-V0)
Weight 0.05 Oz (1.5g)
Reliability Specifications
Parameter Conditions Min. Typ. Max. Units
MTBF MIL HDBK 217F, 25ºC, Gnd Benign 1.0 MHours
Absolute Maximum Ratings
Parameter Conditions Min. Typ. Max. Units
3.3 VDC Input -0.7 7.0
Input Voltage Surge (1 Sec) 5 VDC Input -0.7 7.0 VDC
12 VDC Input -0.7 15.0
Lead Temperature 1.5 mm From Case For 10 Sec 300.0 ºC
Internal Power Dissipation All Models 450 mW
Caution: Exceeding Absolute Maximum Ratings may damage the module. These are not continuous operating ratings.
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Model Selection Guide
Input Output Load Fuse Rating
Model Efficiency
Voltage (VDC) Current (mA) Voltage Current Current Regulation Slow-Blow
Number (%, Typ)
Nominal Range Full-Load No-Load (VDC) (mA, Max) (mA, Min) (%, Max) (mA)
LF101ESI 5 4.5 - 5.5 281 30 5.0 200.0 20.0 15.0 71 500
LF102ESI 5 4.5 - 5.5 270 30 9.0 111.0 23.0 9.0 74 500
LF103ESI 5 4.5 - 5.5 259 30 12.0 84.0 17.0 7.5 77 500
LF104ESI 5 4.5 - 5.5 259 30 15.0 67.0 13.0 7.0 77 500
LF111ESI 12 10.8 - 13.2 114 15 5.0 200.0 20.0 15.0 73 200
LF112ESI 12 10.8 - 13.2 111 15 9.0 111.0 23.0 9.0 75 200
LF113ESI 12 10.8 - 13.2 107 15 12.0 84.0 17.0 7.5 78 200
LF114ESI 12 10.8 - 13.2 107 15 15.0 67.0 13.0 7.0 78 200
LF151ESI 3.3 3.0 - 3.6 452 55 5.0 200.0 20.0 15.0 67 750
LF152ESI 3.3 3.0 - 3.6 445 55 9.0 111.0 23.0 9.0 68 750
LF153ESI 3.3 3.0 - 3.6 432 55 12.0 84.0 17.0 7.5 70 750
Notes: Derating Curve
1. Output load regulation is specified for a load change of 10% to 100%.
2. When measuring output ripple, it is recommended that an external
0.33 F ceramic capacitor be placed from the +Vout pin to the -Vout
pin for single output units and from each output to common for dual
output units.
3. During operation, care must be taken not to exceed the specified
input range of the unit or to allow the output load to drop below the
specified minimum (10% of full load). Operating the unit under either
of these conditions could cause damage to the unit.
4. These converters are specified for operation without external compo-
nents. However, in some applications the addition of input/ouput ca-
pacitors will enhance stability and reduce output ripple. Recommended
capacitor values are:
Input Output
Vin Vout
Capacitor Capacitor
3.3 VDC 10.0 F 5 VDC 10.0 F
5 VDC 4.7 F 5 VDC 10.0 F
12 VDC 2.2 F 9 VDC 4.7 F
24 VDC 1.0 F 12 VDC 2.2 F Pin Connections
15 VDC 1.0 F
Pin Description Pin Description
For applications requiring very low output noise levels, a simple LC filter
1 -Vin 7 NC
should be effective.
5. It is recommended that a fuse be used on the input of a power supply for 2 +Vin 8 +Vout
protection. See the Model Selection table above for the correct rating. 3 NC 10 NC
5 -Vout 11 NC
Mechanical Dimensions 6 NC 12 NC
Board Layout
NC = No Connection
Notes:
All dimensions are typical in inches (mm)
Tolerance x.xx = ±0.01 (±0.25)
Pin 1 is marked by a "dot" or indentation
on the unit
Leads are tin plated for improved solder-
ability.
MicroPower Direct
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de