MP5010B datasheet(12/15 Pages) MPS

12 / 15 page

MP5010B – 3V-18V, 1A-5A PROGRAMMABLE CURRENT LIMIT SWITCH

MP5010B Rev. 1.0

www.MonolithicPower.com

4/3/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

APPLICATION INFORMATION

Current Limit

The current limit is a function of the external

current-limit resistor. Table 2 and Table 3 list

examples of current values as a function of the

resistor value for both Kelvin current sensing and

direct current sensing.

Rise Time

The rise time is a function of the capacitor (Cdv/dt)

on the dv/dt pin. Table 4 lists typical rise times as

a function of capacitance.

Table 2: Current Limit vs. Current Limit Resistor (VCC=5V, Kelvin Current Sensing)

RLIMIT (Ω)

100

Trip Current (A)

2.31

2.18

2.05

2.00

1.99

Hold Current (A)

1.45

1.10

0.71

0.56

0.47

Table 3: Current Limit vs. Current Limit Resistor (VCC=5V, Direct Current Sensing)

RLIMIT (Ω)

100

220

Trip Current (A)

4.31

3.10

2.69

2.52

2.31

Hold Current (A)

2.79

1.29

0.91

2.43

0.40

Table 4: Rise Time vs. Cdv/dt

Cdv/dt

330pF

1nF

3.3nF

6.8nF

Rise Time

(typ., ms)

1.1

9.4

19.2

* Notes: Rise Time = KRT*(50pF+Cdv/dt), KRT =2.8E6

The “rise time” is measured by from 10% to 90%

of output voltage.

90%

10%

Rise Time

Input

Output

Enable

Figure 2—Rise Time

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