DC-DC CONVERTERS

Tracking Dual Output

1

2 YEAR WARRANTY

DDR12 Series

Dual output

NEW Product

All specifications are typical at nominal input, full load at 25 °C unless otherwise stated

SPECIFICATIONS

The dual output DDR12-25D08-AJ is specially designed to meet the power needs of

logic terminations. This converter offers typical efficiencies greater than 84% when

operated at 50% load or greater. This model features a wide input range as well as

included as standard, and the converter is protected against over-current and over-

voltage conditions.

File Name: ddr12.pdf Rev: 04 Sept 2006

OUTPUT SPECIFICATIONS - Vddq

Voltage adjustability

2.32-2.75 Vdc

Output setpoint accuracy Using 1% trim resistors

±2.5%

Line regulation

Low line to high line

±0.1%

Load regulation

Minimum load to full load

+0%/-1.0%

Cross regulation

±0.4%

Temperature Co-efficient

0.2 mV/ºC

Ripple and noise

5 Hz to 20 MHz

50 mV pk-pk

(See Note 1)

Transient response

4 A/100 µs

±3.0% deviation

(See Note 2)

Overshoot

Nominal output at turn-on

2.0% max.

Undershoot

150 mV max.

OUTPUT SPECIFICATIONS - Vtt

Tracking Accuracy

Measured at Converter Pins

12 mV

(=Vddq/2 - Vtt)

Ripple and noise

5 Hz to 20 MHz

30 mV pk-pk

(See Note 1)

Transient response

8 A/1 µs

±3.0% deviation

(See Note 2)

INPUT SPECIFICATIONS

Input voltage range

Nominal 12 V

10.8-13.2 Vdc

Input current

Minimum load

400 mA

Remote OFF

20 mA

Input current (max.)

(See Note 3)

9 A max. @ Io max.

and Vin = 10.8 Vdc

INPUT SPECIFICATIONS - Contd.

Input reflected ripple

(See Note 4)

100 mA (pk-pk)

Remote ON/OFF

Logic compatibility

Open collector ref to -input

ON

>2.0 Vdc

OFF

<0.8 Vdc

Start-up time

Power up

<20 ms

(See Note 5)

Remote ON/OFF

<20 ms

EMC CHARACTERISTICS

Electrostatic discharge

EN61000-4-2, IEC801-2

Conducted immunity

EN61000-4-2

GENERAL SPECIFICATIONS

Efficiency

Vddq = 2.5 V

84% @ full load

Vtt = 1.25 V

Switching frequency

Vddq

300 kHz typ.

(Fixed)

Vtt

300 kHz typ.

Approvals and

(See Note 7)

IEC60950/EN60950

standards

UL/cUL 1950/60950

Material flammability

UL94V-0

Weight

34 g (1.3 oz)

MTBF

Telcordia SR-332

TBD hours

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating ambient,

0 °C to +80 °C

temperature

Non-operating

-40 °C to +125 °C