DC-DC CONVERTERS

C Class Non-isolated

1

SMT30C Series

12 Vin single output

NEW Product

File Name: smt30c.pdf Rev (04): 16 Dec 2005

2 YEAR WARRANTY

per Telcordia SR-332

The SMT30C series is a new high density open-frame, non-isolated converter for space

sensitive applications. SMT30C has a wide input range of 10.2 Vdc to 13.8 Vdc and offers a

wide 0.9 Vdc to 5.0 Vdc output voltage range with a 30 A load. An external resistor adjusts the

output voltage from its pre-set value of 0.9 V to any value up to the 5 V maximum. Typical

efficiency is 91%. The series offers remote ON/OFF and over-current protection as standard.

With full international safety approvals including EN60950 and Ul/cUL60950, the SMT30C

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

SPECIFICATIONS

OUTPUT SPECIFICATIONS

Voltage adjustability

(See Note 1)

0.9-5.0 Vdc

Output setpoint accuracy 1.0% trim resistors

±3%

Line regulation

Low line to high line

±0.2% max.

Load regulation

Full load to min. load

±1.0% max.

Min/max load

0 A/30 A

Overshoot

At turn-on

1.0% max.

Undershoot

At turn-off

100 mV max.

Ripple and noise

(See Note 2)

50 mV pk-pk

5 Hz to 20 MHz

15 mV rms

Transient response

75 mV max. deviation

(See Note 3)

150 µs recovery to

within regulation band

Current share

Full load

±10%

INPUT SPECIFICATIONS

Input voltage range

Nominal 12 V

10.2-13.8 Vdc

Input current

Minimum load

230 mA

Remote OFF

30 mA

Input current (max.)

(See Note 4)

13.8 A max. @ Io max.

and Vin = 10.8 V

Input reflected ripple

(See Note 2)

150 mA (pk-pk)

Remote ON/OFF

Logic compatibility

Positive logic

ON

>2.4 Vdc

OFF

<0.8 Vdc

Start-up time

Power-up

<30 ms

(See Note 5)

Remote ON/OFF

<30 ms

INPUT SPECIFICATIONS (CONTD.)

Turn ON threshold

9.0 Vdc typ.

Turn OFF threshold

7.6 Vdc typ.

GENERAL SPECIFICATIONS

Efficiency

91% typ.

Switching frequency

Fixed

300 kHz typ.

Approvals and

(See Note 7)

TÜV Product Services

standards

IEC60950, UL/cUL60950

Material flammability

UL94V-0

Weight

28.3 g (1 oz)

Coplanarity

150 µm

MTBF

Telcordia SR-332

4,456,655 hours

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating ambient,

0 ºC to +80 ºC

(See Note 8)

temperature

Non-operating

-40 ºC to +125 ºC

PROTECTION

Short-circuit

Foldback, non-latching

Over-temperature

Hiccup, non-latching

RECOMMENDED SYSTEM CAPACITANCE

Input capacitance

(See Note 9)

270 µF/20 m

Ω ESR max.

Output capacitance

(See Note 9) 2 x 680 µF/10 m

Ω ESR max.