kf50b STMicroelectronics, kf50b Datasheet

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kf50b

Manufacturer Part Number
kf50b
Description
Very Low Drop Voltage Regulators With Inhibit
Manufacturer
STMicroelectronics
Datasheet

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Features
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.
Table 1.
February 2008
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
Device summary
KF15B
KF25B
KF33B
Very low drop voltage regulators with inhibit
Part numbers
Rev 11
SO-8
KF40B
KF50B
KF80B
DPAK
KFxxB
www.st.com
1/20
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kf50b Summary of contents

Page 1

... It requires only a 2.2 µF capacitor for stability allowing space and cost saving. Table 1. Device summary KF15B KF25B KF33B February 2008 Very low drop voltage regulators with inhibit SO-8 Part numbers Rev 11 KFxxB DPAK KF40B KF50B KF80B 1/20 www.st.com 20 ...

Page 2

Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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Diagram Figure 1. Schematic diagram 3/20 ...

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Pin configuration Figure 2. Pin connections (top view) SO-8 4/20 DPAK ...

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Maximum ratings Table 2. Absolute maximum ratings Symbol V DC input voltage I I Output current O P Power dissipation TOT T Storage temperature range STG T Operating junction temperature range OP Note: Absolute maximum ratings are those values ...

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Electrical characteristics Table 4. Electrical characteristics for KF15 (refer to the test circuits 2.2 µF unless otherwise specified.) O Symbol Parameter V Output voltage O V Operating input voltage I I Output current limit O ΔV ...

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Table 5. Electrical characteristics for KF25 (refer to the test circuits 2.2 µF unless otherwise specified.) O Symbol Parameter V Output voltage O V Operating input voltage I I Output current limit O ΔV Line regulation O ...

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Table 6. Electrical characteristics for KF33 (refer to the test circuits 2.2 µF unless otherwise specified.) O Symbol Parameter V Output voltage O V Operating input voltage I I Output current limit O ΔV Line regulation O ...

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Table 7. Electrical characteristics for KF40 (refer to the test circuits 2.2 µF unless otherwise specified.) O Symbol Parameter V Output voltage O V Operating input voltage I I Output current limit O ΔV Line regulation O ...

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Table 8. Electrical characteristics for KF50 (refer to the test circuits 2.2 µF unless otherwise specified.) O Symbol Parameter V Output voltage O V Operating input voltage I I Output current limit O ΔV Line regulation O ...

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Table 9. Electrical characteristics for KF80 (refer to the test circuits 2.2 µF unless otherwise specified.) O Symbol Parameter V Output voltage O V Operating input voltage I I Output current limit O ΔV Line regulation O ...

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Typical performance characteristics (unless otherwise specified V Figure 4. Dropout voltage vs output current Figure 6. Supply current vs input voltage Figure 8. Short circuit current vs input voltage 12/20 = 3.3 V) O(NOM) Figure 5. Dropout voltage vs ...

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Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner ...

Page 14

Dim. Min. A 1.35 A1 0.10 A2 1.10 B 0.33 C 0.19 D 4. 5.80 h 0.25 L 0.40 k ddd 14/20 SO-8 mechanical data mm. Typ. Max. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 1.27 ...

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DPAK mechanical data mm. Dim. Min. Typ. A 2.2 A1 0.9 A2 0.03 B 0.64 b4 5.2 C 0. 5.1 E 6.4 E1 4.7 e 2.28 e1 4 (L1) 2.8 L2 ...

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Tape & reel SO-8 mechanical data Dim. Min 12 8.1 Bo 5.5 Ko 2.1 Po 3.9 P 7.9 16/20 mm. Typ. Max. Min. 330 13.2 0.504 0.795 2.362 22.4 8.5 0.319 5.9 ...

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Tape & reel DPAK-PPAK mechanical data mm. Dim. Min. Typ 12.8 13 6.80 6.90 Bo 10.40 10.50 Ko 2.55 2.65 Po 3.9 4.0 P 7.9 8.0 inch. Max. Min. Typ. 330 13.2 ...

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... Order codes Table 10. Order codes SO-8 (tape and reel) KF25BD-TR KF33BD-TR KF50BD-TR 18/20 Packages DPAK (tape and reel) KF15BDT-TR KF25BDT-TR KF33BDT-TR KF40BDT-TR KF50BDT-TR KF80BDT-TR Output voltage 1.5 V 2 ...

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Revision history Table 11. Document revision history Date Revision 06-Jun-2007 9 14-Dec-2007 10 21-Feb-2008 11 Changes Order codes updated. Modified: Table 10. Modified: Table 10 on page 18. 19/20 ...

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... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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