8/20

0.8V ~ 1.45V

1.5V ~ 1.75V

1.8V ~ 5.0V

≧

6.8μF

≧

4.7μF

≧

1.0μF

■

OPERATIONAL EXPLANATION

current limit circuit and short circuit protection operate in relation to the level of output current.

<Low ESR Capacitor>

With the XCM406 series regulator, a stable output voltage is achievable even if low ESR capacitors are used, as a phase

compensation circuit is built into the regulator. In order to ensure the effectiveness of the phase compensation, we

Output Capacitor Corresponding Table

<Current Limiter, Short-Circuit Protection>

The XCM406 series regulator offers a combination of current limit and short circuit protection by means of a built-in fixed

current limiter circuit and a foldback circuit. When drops further and output current decreases. When the output pin is

shorted, a current of about 50mA flows. the load current reaches the current limit level, the fixed current limiter circuit

operates and output voltage drops. As a result of this drop in output voltage, the foldback circuit operates, the output

voltage

<EN Pin>

The IC's internal regulator circuitry can be shut down via the signal from the EN pin with the XC6210 series. In

EN pin logic (See the product classification). Note that as the XCM406AA types are 'High Active / No Pull-Down',

operations will become unstable with the EN pin open. Although the EN pin is equal to an inverter input with CMOS

hysteresis, with either the pull-up or pull-down options, the CE pin input current will increase when the IC is in operation.

correct specifications for the EN pin, the IC will operate normally. However, supply current may increase as a result of

■

NOTES ON USE

1. Please use this IC within the stated maximum ratings. For temporary, transitional voltage drop or voltage rising

phenomenon, the IC is liable to malfunction should the ratings be exceeded.

2. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on

4. The two dies in the same package are closely placed so that one heat generation affects the other.

Heat dissipation should be evaluated on the actual board design before finalizing. In case of light load operation like

100μA below, but the other side is heavy load operation, the light load output voltage may happen to be elevated up to

the input voltage level as a result of leakage current. As a counter measure when it happened, adding one resistor

5. Torex places an importance on improving our products and its reliability.

However, by any possibility, we would request user fail-safe design and post-aging treatment on system or equipment.