MIC2007 datasheet(14/17 Pages) MICREL

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Micrel

MIC2007/MIC2017

October 2005

M9999-102805

Figure 4. IOUT in Current Limiting for VIN - VOUT ≤1V

Figure 5. IOUT in Current Limiting for VIN - VOUT >1V

This folding back of ILIMIT can be generalized by plotting

ILIMIT as a function of VOUT, as shown below. The slope

of VOUT between IOUT = 0 and IOUT = ILIMIT (where ILIMIT =

1) is determined by RON of MIC2007/2017 and ILIMIT.

0.2

0.4

0.6

0.8

1.0

1.2

456

OUTPUT VOLTAGE (V)

Normalized Output Current

vs. Output Voltage (5V)

Figure 6.

0.2

0.4

0.6

0.8

1.0

1.2

0.5 1.0 1.5 2.0 2.5 3.0

OUTPUT VOLTAGE (V)

Normalized Output Current

vs. Output Voltage (2.5V)

Figure 7.

CSLEW

The CSLEW input is provided to increase control of the

output voltage ramp at turn-on. This input allows

designers the option of decreasing the output’s slew rate

(slowing the voltage rise) by adding an external

capacitance between the pin, CSLEW, and VIN. This

capacitance slows the rate at which the pass FET gate

voltage increases and thus, slows both the response to

an Enable command as well as VOUT’s ascent to its final

value.

Figure 8 illustrates effect of CSLEW on turn-ON delay and

output rise time.

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