KF15B| Datasheet

KF15B, KF15BD, KF15BDT-TR, KF25B, KF25BD-TR, KF25BDT-TR, KF30B, KF33B, KF33BD-TR, KF33BDT-TR, KF40B, KF40BDT-TR, KF50B, KF50BD-TR, KF50BDT-TR, KF52B, KF52BDT, KF80B, KF80BDT-TR

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KFxxB
Very low drop voltage regulators with inhibit
Features

Very low dropout voltage (0.4 V) Very low quiescent current (typ. 50 uA in OFF mode, 500 uA in ON mode) Output current up to 500 mA Logic-controlled electronic shutdown Output voltages of 1.5; 2.5; 3.3; 4; 5; 8 V Internal current and thermal limit Only 2.2 uF for stability Available in 2 % accuracy at 25 C Supply voltage rejection: 70 db (typ.) Temperature range: -40 to 125 C
SO-8 DPAK

Description
The KFxx series are very low drop regulators available in SO-8 package and in a wide range of output voltages. The very low drop voltage (0.4 V) and the very low quiescent current make them particularly suitable for low noise, low power applications and specially in battery powered systems. A shutdown logic control function is available (pin 5, TTL compatible). This means that when the device is used as a local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. It requires only a 2.2 uF capacitor for stability allowing space and cost saving.

Table 1.

Device summary
Part numbers KF15B KF25B KF33B KF40B KF50B KF80B

February 2008

Rev 11

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