Figure 5: Output voltage response to step-change in load

current (75-50% Iomax; di/dt = 1A/µs). Load cap: 10µF

tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout

(0.2V/div, 200us/div), Bottom Trace: Iout (1A/div). Scope

measurement should be made using a BNC cable (length

shorter than 20 inches). Position the load between 51 mm to

76 mm (2 inches to 3 inches) from the module

Figure 6: Output voltage response to step-change in load current

(50-75% Iomax; di/dt = 1A/µs). Load cap: 10µF tantalum capacitor

and 1µF ceramic capacitor. Top Trace: Vout (0.2V/div, 200us/div),

Bottom Trace: Iout (1A/div). Scope measurement should be made

using a BNC cable (length shorter than 20 inches). Position the

load between 51 mm to 76 mm (2 inches to 3 inches) from the

module

Figure 7: Test set-up diagram showing measurement points

for Input Terminal Ripple Current and Input Reflected Ripple

Current.

Note: Measured input reflected-ripple current with a simulated

possible battery impedance. Measured current as shown

below

and nominal input voltage with 12µH source impedance and 33µF

electrolytic capacitor (100 mA/div, 2us/div)

0

E48SR12006_03022007

4