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TOTAL POWER INT'L
10W, Step-Down, Single Output DC/DC Converters
Key Features
IDS100 Series
Efficiency up To 93% Output Current up to 2A MTBF > 1,500,000 Hours Low Cost Remote On/Off Control Low Output Noise Temperature Performance -25] to +70] Step-down Switching Regulator Overload Protection Standby Current 100uA only
High efficiency, wide input voltage range and low output noise define IDS Series of non-isolated, step-down, switching DC/DC converters. The 3.3V and 5V output devices are respectively up to 93% efficiency. All models are fully line and load regulated and maintain specified accuracy over the impressively wide input voltage ranges of 4.75 to 13.6V for 3.3V output, 6 to 16.5V for 5V output and 16 to 28V for 3.3V and 5V outputs. Output ripple and noise are typically 30mV P-P. The high efficiency of the IDS Series eliminates the need for thermally conductive potting compound. Devices are specified for full-power operation up to ambient temperatures of +70] Calculated MTBF (MIL-HDBK-217F) is more than 1.5 million hours. These simple-to-use power converters have no minimum load requirements. They draw 1mA when unloaded and a mere 100uA in the standby mode (On/Off Control turns off). 3.3V models have an output voltage adjustment range from 1.8 to 3.3V and 5V models are adjustable down to 3.0V.
3:1
Wide Range
Remote on/off
High Power Density
Low Noise
Vout Adj.
More Power
Block Diagram
Single Output
+Vin Switching Regulator
+Vo
On/Off -Vin
Adj. -Vo
IDS100 Series
Model Selection Guide
Model Number Input Voltage Output Voltage Output Current Input Current Efficiency
VDC IDS101 IDS112 IDS121 IDS122 5 ( 4.75 ~ 13.6 ) 12 ( 6 ~ 16.5 ) 24 ( 16 ~ 28 )
VDC 3.3 5 3.3 5
Max. mA 2000 2000 2000 2000
Min. mA 200 200 200 200
@Max. Load mA (Typ.) 1434 896 331
@No Load mA (Typ.) 21 27
@Max. Load % (Typ.) 92 93 83
45 490 85
Absolute Maximum Ratings
Parameter 5VDC Input Models Input Surge Voltage 12VDC Input Models ( 1000 mS ) 24VDC Input Models Lead Temperature (1.5mm from case for 10 Sec.) Internal Power Dissipation Min. -0.7 -0.7 -0.7 ----Max. 16 25 30 235 1500 Unit VDC VDC VDC ] mW
Notes :
1. Specifications typical at Ta=+25], resistive load, nominal input voltage, rated output current unless otherwise noted. 2. Transient recovery time is measured to within 1% error band for a step change in output load of 50% to 100%. 3. Ripple & Noise measurement bandwidth is 0-20 MHz. 4. These power converters require a minimum output loading to maintain specified regulation. 5. Operation under no-load conditions will not damage these modules; however, they may not meet all specifications listed. Min. Max. -25 +70 -25 +125 --95 Free-Air Convection Unit ] ] % 6. All DC/DC converters should be externally fused at the front end for protection. 7. Other input and output voltage may be available, please contact factory. 8. Specifications subject to change without notice.
Exceeding the absolute maximum ratings of the unit could cause damage. These are not continuous operating ratings.
Environmental Specifications
Parameter Operating Temperature Storage Temperature Humidity Cooling Conditions Ambient
Input Specifications
Parameter Start Voltage Model 5V Input Models 12V Input Models 24V Input Models Min. 3.5 5.5 12 Typ. ------Max. 3.9 6 15 VDC Unit
IDS100 Series
Output Specifications
Parameter Output Voltage Accuracy Line Regulation Load Regulation Ripple & Noise (20MHz) Ripple & Noise (20MHz) Ripple & Noise (20MHz) Over Load Transient Recovery Time Transient Response Deviation Temperature Coefficient Output Short Circuit 50% Load Step Change Over Line, Load & Temp. Vin=Min. to Max. Io=0% to 100% Conditions Min. ------------120 ------Continuous Typ. {1.0 {0.2 {0.5 30 ------100 {2 {0.01 Max. {2.0 {0.5 {1.5 50 120 15 --150 {4 {0.02 Unit % % % mV P-P mV P-P mV rms % uS % %/]
General Specifications
Parameter Isolation Voltage Switching Frequency MTBF MIL-HDBK-217F @ 25], Ground Benign Conditions Min. none --1500 300 ------KHz K Hours Typ. Max. Unit
Remote On/Off Control
Parameter Supply On Supply Off Device Standby Input Current Control Input Current ( on ) Control Input Current ( off ) Control Common Conditions Min. 3.0 to 5.0VDC or Open Circuit -0.3 --------100 ----1.2 300 50 -100 Typ. Max. Unit VDC VDC uA uA uA
Referenced to Negative Input
Output Voltage Trim
Parameter Trim Down Range Models IDS101, IDS121 IDS112, IDS122 Min. 1.8 3 Typ. ----Max. 3.3 5 Unit VDC VDC
Input Fuse Selection Guide
5V Input Models 4000mA Slow - Blow Type 12V Input Models 3000mA Slow - Blow Type 24V Input Models 1000mA Slow - Blow Type
IDS100 Series
90 80 Efficiency (%) 70 60 50 40
100 90 Efficiency (%) 80 70 60 50
30 20 10 20 40 60 80 100
Low
Nom Input Voltage (V)
High
Load Current (%)
Efficiency vs Input Voltage
Efficiency vs Output Load
100 80 Output Power (%) 100LFM Natural convection 400LFM
200LFM
60
40
20 0 -25
50 60 70 80 ] 90 100 110
Ambient Temperature
Derating Curve
IDS100 Series
Test Configurations
Peak-to-Peak Output Noise Measurement Test
Use a Cout 4.7uF ceramic capacitor. Scope measurement should be made by using a BNC socket, measurement bandwidth is 0-20 MHz. Position the load between 50 mm and 75 mm from the DC/DC Converter.
+Vin Single Output DC / DC Converter -Vin -Out +Out Copper Strip Cout Scope Resistive Load
Input Source Impedance
The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the power module. In applications where power is supplied over long lines and output loading is high, it may be necessary to use a capacitor at the input to ensure startup. Capacitor mounted close to the power module helps ensure stability of the unit, it is recommended to use a good quality low Equivalent Series Resistance (ESR < 1.0[ at 100 KHz) capacitor of a 100uF for the 5V input devices and a 33uF for the 12V and 24V devices.
+ DC Power Source + Cin -Vin -Out +Vin DC / DC Converter +Out Load
Design & Feature Considerations
Remote On/Off
Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin, and off during a logic low. Negative logic remote on/off turns the module off during a logic low and on during a logic high. To turn the power module on and off, the user must supply a switch to control the voltage between the on/off terminal and the -Vin terminal. The switch can be an open collector or equivalent. A logic low is -0.3V to 1.2V. A logic high is 3.0V to 5.0V. The maximum sink current at on/off terminal during a logic low is -100 uA. The maximum allowable leakage current of the switch at on/off terminal (3.0 to 5.0V) is 50uA.
Output Voltage Trim
Connecting the external resistor (Radj) between the Vadj and +Vout pins decreases the output voltage to set the point as defined in the following equation:
VR1=
(Rx1200) (Vo-1.195) (Rx1.195) -[1200(Vo-1.195)]
IDS101 and IDS121 ==>Rx=2130[ Output Voltage range is 1.8-3.3VDC. IDS112 and IDS122==>Rx=3840[ Output Voltage range is 3.0-5.0VDC.
+ DC Power Source +Vin Fuse -Vin On/Off -Out Vadj +Out Load Radj
Overcurrent Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure current limiting for an unlimited duration. At the point of current-limit inception, the unit shifts from voltage control to current control. The unit operates normally once the output current is brought back into its specified range.
Thermal Considerations
Many conditions affect the thermal performance of the power module, such as orientation, airflow over the module and board spacing. To avoid exceeding the maximum temperature rating of the components inside the power module, the ambient temperature must be kept below 70C. The derating curves are determined from measurements obtained in an experimental apparatus.
Position of air velocity probe and thermocouple 15mm / 0.6in 50mm / 2in Air Flow
Output Ripple Reduction
A good quality low ESR capacitor placed as close as practicable across the load will give the best ripple and noise performance. To reduce output ripple, it is recommended to use 22uF capacitors at the output.
DUT
IDS100 Series
Mechanical Dimensions
20.2 [0.80]
8.3MAX [0.327MAX]
0.8 [0.03]
21.5 [0.85]
1 2 3 4 5
24.0 [0.95]
2.54 [0.100]
Tolerance
Millimeters X.X{0.25 X.XX{0.13 {0.05
Inches X.XX{0.01 X.XXX{0.005 {0.002
Pin
Pin Connections
Pin 1 2 3 4 5 Function Remote On/Off +Vin -Vin +Vout Trim
3.5 [0.14]
0.25 [0.010]
Physical Characteristics
5 to 10Hz amplitude 10mm pk-pk 10 to 55Hz acceleration 2G Acceleration 20G max. time 11 ms 8.6g
Vibration
:
Shock Weight Soldering temperature
: :
:
235] max./10sec
Leads are tin plated for improved solderability.

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