MCP2025-500ESLASHP datasheet(8/38 Pages) MICROCHIP

8 / 38 page

MCP2025

DS20002306B-page 8

 2012-2014 Microchip Technology Inc.

Under specific ambient temperature and battery

voltage range, the voltage regulator can output as high

as 150 mA current. For current load capability of the

voltage regulator, refer to Figures 2-8 and 2-9.

The regulator requires an external output bypass

capacitor for stability. See Figure 2-1 for correct

capacity and ESR for stable operation.

In worst-case scenarios, the ceramic capacitor may

derate by 50%, based on tolerance, voltage and

temperature. Therefore, in order to ensure stability,

ceramic capacitors smaller than 10 µF may require a

small series resistance to meet the ESR requirements,

as shown in Table 1-3.

FIGURE 1-3:

VOLTAGE REGULATOR BLOCK DIAGRAM

Note:

The regulator has an overload current limit

of approximately 250 mA. The regulator

output voltage, VREG, is monitored. If

output voltage VREG is lower than VSD, the

voltage regulator will turn off. After a

recovery time of about 3 ms, the VREG will

be checked again. If there is no short

circuit, (VREG >VSD), then the voltage

regulator remains on.

Note:

A ceramic capacitor of at least 10 µF or a

tantalum capacitor of at least 2.2 µF is

recommended for stability.

TABLE 1-3:

RECOMMENDED SERIES

RESISTANCE FOR CERAMIC

CAPACITORS

Resistance

Capacitor



1µF

0.47



2.2 µF

0.22



4.7 µF

0.1



6.8 µF

Pass

Element

Sampling

Network

Buffer

VREG

VBB

VSS

Fast

Transient

Loop

VREF

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