ELECTRICAL CHARACTERISTICS CURVES
0 | 0 |
0
Figure 9: Turn-on transient at zero load current, 4 ms/div;
Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input, 5V/div.
Figure 10: Output voltage response to step-change in load current, 200mV/div, 200us/div. 75%-50%-75% of Io, max, di/dt = 0.1A/µs. Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor.
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..
is | ic |
| Vin+ |
+ | + |
| Vin- |
Cs: 220uF | 100uF, |
| ESR=0.2 ohm @ |
| 25oC 100KHz |
0
Figure 11: Output voltage response to step-change in load current, 200mV/div, 1ms/div. 75%-50%-75% of Io, max, di/dt
=1A/µs. Load cap: 5000µF tantalum capacitor and 1µF ceramic capacitor.
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 12: 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 source Inductance (LTEST) of 12 μH. Capacitor Cs offset possible battery impedance. Measured current as shown below.
5
DS_H48SA12025_05052008