IDS100 Series
10W, Step-Down, Single Output DC/DC Converters
Key Features
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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
Minmax’s 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
1
+Vo
On/Off
Adj.
-Vin
-Vo
MINMAX
REV:0 2005/04
IDS100 Series
Model Selection Guide
Model
Number
Input
Voltage
Output
Voltage
VDC
VDC
Max.
mA
Min.
mA
@Max. Load
mA (Typ.)
@No Load
mA (Typ.)
@Max. Load
% (Typ.)
IDS101
5
( 4.75 ~ 13.6 )
3.3
2000
200
1434
21
92
IDS112
12
( 6 ~ 16.5 )
5
2000
200
896
27
93
3.3
2000
200
331
IDS121
IDS122
24
( 16 ~ 28 )
Output Current
Input Current
Efficiency
83
45
5
2000
200
490
85
Notes :
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
Exceeding the absolute maximum ratings of the unit could cause damage.
These are not continuous operating ratings.
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.
Environmental Specifications
Parameter
Operating Temperature
Storage Temperature
Humidity
Cooling
Conditions
Ambient
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.
Input Specifications
Parameter
Start Voltage
REV:0 2005/04
Model
Min.
Typ.
Max.
5V Input Models
3.5
---
3.9
12V Input Models
5.5
---
6
24V Input Models
12
---
15
MINMAX
Unit
VDC
2
IDS100 Series
Output Specifications
Parameter
Conditions
Min.
---
{1.0
{2.0
%
Line Regulation
Vin=Min. to Max.
---
{0.2
{0.5
%
Load Regulation
Io=0% to 100%
---
{0.5
{1.5
%
---
30
50
mV P-P
---
---
120
mV P-P
Ripple & Noise (20MHz)
---
---
15
mV rms
Over Load
120
---
---
%
Transient Recovery Time
---
100
150
uS
Output Voltage Accuracy
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
Transient Response Deviation
Over Line, Load & Temp.
50% Load Step Change
Temperature Coefficient
Output Short Circuit
Typ.
Max.
Unit
---
{2
{4
%
---
{0.01
{0.02
%/]
Typ.
Max.
Unit
Continuous
General Specifications
Parameter
Conditions
Min.
Isolation Voltage
none
Switching Frequency
MTBF
---
300
---
KHz
MIL-HDBK-217F @ 25], Ground Benign
1500
---
---
K Hours
Conditions
Min.
Typ.
Max.
Remote On/Off Control
Parameter
Supply On
3.0 to 5.0VDC or Open Circuit
Unit
VDC
Supply Off
-0.3
---
1.2
VDC
Device Standby Input Current
---
100
300
uA
Control Input Current ( on )
---
---
50
uA
---
---
-100
uA
Control Input Current ( off )
Control Common
Referenced to Negative Input
Output Voltage Trim
Parameter
Trim Down Range
Models
Min.
Typ.
Max.
Unit
IDS101, IDS121
1.8
---
3.3
VDC
IDS112, IDS122
3
---
5
VDC
Input Fuse Selection Guide
3
5V Input Models
12V Input Models
24V Input Models
4000mA Slow - Blow Type
3000mA Slow - Blow Type
1000mA Slow - Blow Type
MINMAX
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IDS100 Series
90
100
80
Efficiency (%)
Efficiency (%)
90
80
70
70
60
50
40
60
50
30
20
Low
Nom
High
Input Voltage (V)
Efficiency vs Input Voltage
10
20
40
60
80
100
Load Current (%)
Efficiency vs Output Load
100
100LFM
400LFM
Natural
convection
200LFM
Output Power (%)
80
60
40
20
0
〜
-25
50
60
70
90
80
Ambient Temperature
100
110
]
Derating Curve
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MINMAX
4
IDS100 Series
Test Configurations
Input Source Impedance
Peak-to-Peak Output Noise Measurement Test
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.
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
+Out
Single Output
DC / DC
Converter
-Vin
Copper Strip
Cout
Scope
Resistive
Load
+
-Out
+Vin
+
DC Power
Source
Design & Feature Considerations
DC / DC
Converter
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.
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.
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.
-Vin
-Out
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=
(Rx．1200) ．(Vo-1.195)
(Rx．1.195) -[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
+Out
-Vin
-Out
On/Off
Vadj
Fuse
Load
Radj
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 70°C.
The derating curves are determined from measurements
obtained in an experimental apparatus.
Position of air velocity
probe and thermocouple
15mm / 0.6in
5
Load
Cin
-
Remote On/Off
+Out
MINMAX
50mm / 2in
Air Flow
DUT
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IDS100 Series
Mechanical Dimensions
20.2 [0.80]
8.3MAX [0.327MAX]
21.5 [0.85]
2
3
4
5
2.54 [0.100]
Tolerance
Pin
Millimeters
Inches
X.X{0.25
X.XX{0.01
X.XX{0.13
{0.05
X.XXX{0.005
{0.002
3.5 [0.14]
1
24.0 [0.95]
0.8 [0.03]
Pin Connections
0.25 [0.010]
Physical Characteristics
Pin
Function
1
Remote On/Off
2
+Vin
3
-Vin
4
+Vout
5
Trim
5 to 10Hz amplitude 10mm pk-pk
Vibration
:
Shock
:
Acceleration 20G max. time 11 ms
Weight
:
8.6g
Soldering
temperature
:
235] max./10sec
10 to 55Hz acceleration 2G
Leads are tin plated for improved solderability.
REV:0 2005/04
MINMAX
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