DS_D12S300-1_12282009

9

Output Capacitance

series modules. Hence, no external output capacitor is

required for stable operation.

Reflected Ripple Current and Output Ripple and

Noise Measurement

The measurement set-up outlined in Figure 30 has been

used for both input reflected/ terminal ripple current and

output voltage ripple and noise measurements on

D12S300-1 series converters.

DC-DC Converter

1uF

Ceramic

Tan

10uF

Vin+

Load

Ltest

Cs

Cin

Output voltage ripple noise measurement point

Input reflected current measurement point

Cs=330µF OS-CON cap x 1, Ltest=1µH, Cin=330µF OS-CON

cap x 1

Figure 30: Input reflected ripple/ capacitor ripple current and

output voltage ripple and noise measurement setup for

D12S300-1

FEATURES DESCRIPTIONS (CON.)

Voltage Margining Adjustment

Output voltage margin adjusting can be implemented in

the Trim pin to the Ground for margining up the output

voltage. Also, the output voltage can be adjusted lower

the voltage source Vt. Figure 29 shows the circuit

configuration for output voltage margining adjustment.

Figure 29: Circuit configuration for output voltage margining