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KF33B Datasheet

Very low drop voltage regulators

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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 µA in OFF
mode, 500 µA 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 µF for stability
Available in ± 2 % accuracy at 25 °C
Supply voltage rejection: 70 db (typ.)
Temperature range: -40 to 125 °C
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 µF
capacitor for stability allowing space and cost
saving.
SO-8
DPAK
Table 1. Device summary
KF15B
KF25B
KF33B
Part numbers
KF40B
KF50B
KF80B
February 2008
Rev 11
1/20
www.st.com
20


STMicroelectronics Electronic Components Datasheet

KF33B Datasheet

Very low drop voltage regulators

No Preview Available !

Contents
Contents
KFxxB
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1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2/20


Part Number KF33B
Description Very low drop voltage regulators
Maker STMicroelectronics
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KF33B Datasheet PDF






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