SMT20C Series
DC-DC CONVERTERS
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C Class Non-isolated
5 Vin and 12 Vin single output
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NEW Product
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20 A current rating
Input voltage range: 4.5 Vdc to 5.5 Vdc or 10.2 Vdc to 13.8 Vdc
Output voltage range: 0.9 Vdc to 3.3/5.0 Vdc
Industry leading value
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Cost optimized design
Excellent transient response
Output voltage adjustability
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Pathway for future upgrades
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Supports silicon voltage migration
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Resulting in reduced design-in and qualification time
Designed in reliability: MTBF of >7 million hours
per Telcordia SR-332
Available RoHS compliant
The SMT20C Series is a new high density open frame non-isolated converter for space-sensitive
applications. Each model has a wide input range (4.5 Vdc to 5.5 Vdc or 10.2 Vdc to 13.8 Vdc) and
offers a wide 0.9 Vdc to 3.3/5 V output voltage range with a 20 A load. An external resistor adjusts
the output voltage from its pre-set value of 0.9 V to any value up to the maximum allowed value for
that model. Typical efficiencies are 87% for the 5 V input version and 91% for the 12 V input
version at full load conditions. The SMT20C series offers remote ON/OFF and overcurrent
protection as standard. With full international safety approval including EN60950 and
UL/cUL60950
, the SMT20C reduces compliance costs and time to market.
All specifications are typical at nominal input Vin = 12 V, full load at 25 °C unless otherwise stated
2 YEAR WARRANTY
SPECIFICATIONS
OUTPUT SPECIFICATIONS
Voltage adjustability
(See Note 5)
5 V input models
12 V input models
0.9-3.3 Vdc
0.9-5.0 Vdc
±2.5%
±0.2% max.
±1.3% max.
0 A/20 A
5 V input models
12 V input models
(See Note 1)
3.0% max.
1.0% max.
See Table on page 2
100 mV max. deviation
200 µs recovery to
within regulation band
INPUT SPECIFICATIONS (CONTD.)
Turn ON threshold
Turn OFF threshold
5 Vin
12 Vin
5 Vin
12 Vin
4.5 Vdc typ.
9.3 Vdc typ.
4.3 Vdc typ.
7.8 Vdc typ.
Output setpoint accuracy With 1.0% trim resistors
Line regulation
Load regulation
Min/max load
Overshoot
(at turn on)
Ripple and noise
5 Hz to 20 MHz
Transient response
(See Note 2)
Low line to high line
GENERAL SPECIFICATIONS
Efficiency
Switching frequency
Approvals and
standards
Material flammability
Weight
Coplanarity
MTBF
Telcordia SR-332
Fixed
(See Note 7)
See Table on page 2
275 kHz typ.
TÜV Product Services
IEC60950, UL/cUL60950
UL94V-0
14.2 g (0.5 oz)
150 µm
7,963,574 hours
INPUT SPECIFICATIONS
Input voltage range
Input current
Input current (max.)
(See Note 3)
Input reflected ripple
Remote ON/OFF
Logic compatibility
ON
OFF
Start-up time
(See Note 8)
Power up
Remote ON/OFF
5 V input model
12 V input model
Minimum load
Remote OFF
5 V input model
12 V input model
(See Note 4)
4.5-5.5 Vdc
10.2-13.8 Vdc
65 mA
20 mA
15 A @ lo max.
11 A @ lo max.
200 mA (pk-pk)
Positive Logic
>2.4 Vdc
<0.8 Vdc
<20 ms
<20 ms
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
(See Note 9)
Operating ambient,
temperature
Non-operating
0 ºC to +80 ºC
-40 ºC to +125 ºC
PROTECTION
Short-circuit protection
RECOMMENDED SYSTEM CAPACITANCE
Input capacitance
Output capacitance
(See Note 10) 270 µF/20 mΩ ESR max.
(See Note 10) 680 µF/10 mΩ ESR max.
Hiccup, non-latching
File Name: smt20c.pdf Rev (03): 15 Dec 2005
ARTESYN [ ARTESYN TECHNOLOGIES ]
