ELECTRICAL CHARACTERISTIC CURVES

Figure 4: Turn-on transient at full rated load current (5 ms/div).

Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 5V/div

Figure 5: Turn-on transient at zero load current (2 ms/div). Top

Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 5V/div

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

current (50%-75%-50% of Io, max; di/dt = 0.1A/µs). Load cap:

10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace:

Vout

(200mV/div),

Bottom

Trace:

Iout

(10A/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: Output voltage response to step-change in load

current (50%-75%-50% of Io, max; di/dt = 1A/µs). Load

cap:10uF,tantalum capacitor and 1µF ceramic capacitor. Top

Trace: Vout (200mV/div), Bottom Trace: Iout (10A/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 8: 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. Measure current as shown above.

DS_Q48SB10828_11062006

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