DDR12 datasheet(5/11 Pages) ARTESYN

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DDR12 Series | Tracking Dual Output

DC-DC Converters

www.artesyn.com

File Name: lf_ddr12.pdf Rev: 29 Nov 2005

Input Characteristics

Electrical Charact. - Vddq O/P

Characteristic

Symbol

Min

Typ

Max

Units

Notes and Conditions

Nominal set-point voltage

Vddq (nom)

2.316

Vdc

With no external trim resistor

Output voltage range

Vddq

2.316

2.750

Vdc

For details on trimming the

output voltage see

Application Note 133

Output set-point accuracy

±1.5

±2.5

Using 1% trim resistors

measured at minimum load

Load regulation

+0/-1

+1/-2

Vary load with line held constant

(Voltage typically drops with load)

Line regulation

±0.1

±0.2

Vary line with load held constant

Cross regulation

±0.4

±0.6

Vary load on Vtt with load on

Vddq held constant

Temperature co-efficient

0.2

mV/ºC

Ripple and noise

mV pk-pk

With recommended external

load capacitance and

5 Hz to 20 MHz bandwidth

Load transient response -

Peak deviation for 75% to 100%

peak deviation

step load, di/dt = 0.04 A/µs

Load transient response -

200

µs

Settling time to within 1% of

recovery

output setpoint voltage for

75% to 100% step load

External load capacitance

Cext (Vddq)

1000

1680

3000

µF

Recommended 3 x 560 µF with

total ESR of 5 m

Ω and additional

high-quality ceramic capacitors.

Consult factory for other capacitance

Overshoot

2.0

Nominal output at turn-on

Undershoot

150

mVdc

Output current - continuous

Iddq

1.5

Adc

Output current - short circuit

Isc-ddq

A rms

Latching short circuit protection

power or enable needs to be

cycled

Characteristic

Symbol

Min

Typ

Max

Units

Notes and Conditions

Input current - operating

Iin

7.2

Adc

Reflected ripple current

Iin (ripple)

mA rms

measured with external filter.

mA pk-pk See Application Note 133 for

details

Input capacitance - internal

Cinput

420

µF

filter

Input capacitance - external

Cbypass

µF

Use large value ceramic

filter

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