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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 A in OFF mode, 500 A 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 F 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 F capacitor for stability allowing space and cost saving. Table 1. Device summary Part numbers KF15B KF25B KF33B KF40B KF50B KF80B February 2008 Rev 11 1/20 www.st.com 20 Contents KFxxB Contents 1 2 3 4 5 6 7 8 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2/20 KFxxB Diagram 1 Figure 1. Diagram Schematic diagram 3/20 Pin configuration KFxxB 2 Figure 2. Pin configuration Pin connections (top view) SO-8 DPAK 4/20 KFxxB Maximum ratings 3 Table 2. Maximum ratings Absolute maximum ratings Parameter DC input voltage Output current Power dissipation Storage temperature range Operating junction temperature range Value -0.5 to 20 Internally Limited Internally Limited -40 to 150 -40 to 125 C C Unit V Symbol VI IO PTOT TSTG TOP Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Thermal data Parameter Thermal resistance junction-case DPAK 8 SO-8 20 Unit C/W Table 3. Symbol RthJC Figure 3. Test circuit 5/20 Electrical characteristics KFxxB 4 Table 4. Symbol VO VI IO VO VO Electrical characteristics Electrical characteristics for KF15 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Parameter Output voltage Operating input voltage Output current limit Line regulation Load regulation VI = 2.5 to 20 V, IO = 5 mA VI = 2.8 V, IO = 5 to 500 mA VI = 2.5 to 20V, IO = 0mA Id Quiescent current VI = 2.8 to 20V, IO=500mA VI = 6 V OFF MODE f = 120 Hz SVR Supply voltage rejection IO = 5 mA, VI = 3.5 1 V f = 1 kHz f = 10 kHz eN Vd VIL VIH II CO Output noise voltage Dropout voltage Control input logic low Control input logic high Control input current Output bypass capacitance B = 10 Hz to 100 kHz IO = 200 mA Ta = -40 to 125C Ta = -40 to 125C VI = 6 V, VC = 6 V ESR = 0.1 to 10 IO = 0 to 500 mA , 2 2 10 10 50 82 77 60 50 1 0.8 V V V V A F dB ON MODE 12 100 A Test conditions IO = 50 mA, VI = 3.5 V IO = 50 mA, VI = 3.5 V, Ta = -25 to 85C IO = 500 mA Min. 1.47 1.44 2.5 1 2 2 0.5 12 50 1 mA Typ. 1.5 Max. 1.53 V 1.56 20 V A mV mV Unit 6/20 KFxxB Table 5. Symbol VO VI IO VO VO Electrical characteristics Electrical characteristics for KF25 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Parameter Output voltage Operating input voltage Output current limit Line regulation Load regulation VI = 3.5 to 20 V, IO = 5 mA VI = 3.8 V, IO = 5 to 500 mA VI = 3.5 to 20V, IO = 0mA ON MODE 12 OFF MODE f = 120 Hz 50 82 77 60 50 0.2 0.4 0.35 V 0.7 0.8 2 10 2 10 V V A F V dB 100 A Test conditions IO = 50 mA, VI = 4.5 V IO = 50 mA, VI = 4.5 V, Ta = -25 to 85C IO = 500 mA 1 2 2 0.5 12 50 1 mA Min. 2.45 2.4 Typ. 2.5 Max. 2.55 V 2.6 20 V A mV mV Unit Id Quiescent current VI = 3.8 to 20V, IO=500mA VI = 6 V SVR Supply voltage rejection IO = 5 mA, VI = 4.5 1 V f = 1 kHz f = 10 kHz eN Vd VIL VIH II CO Output noise voltage Dropout voltage Control input logic low Control input logic high Control input current Output bypass capacitance B = 10 Hz to 100 KHz IO = 200 mA IO = 500 mA Ta = -40 to 125C Ta = -40 to 125C VI = 6 V, VC = 6 V ESR = 0.1 to 10 IO = 0 to 500 mA , 7/20 Electrical characteristics KFxxB Table 6. Symbol VO VI IO VO VO Electrical characteristics for KF33 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Parameter Output voltage Operating input voltage Output current limit Line regulation Load regulation VI = 4.3 to 20 V, IO = 5 mA VI = 4.6 V, IO = 5 to 500 mA VI = 4.3 to 20V, IO = 0mA ON MODE 12 OFF MODE f = 120 Hz 50 80 75 60 50 0.2 0.4 0.35 V 0.7 0.8 2 10 2 10 V V A F V dB 100 A Test conditions IO = 50 mA, VI = 5.3 V IO = 50 mA, VI = 5.3 V, Ta = -25 to 85C IO = 500 mA 1 2 2 0.5 12 50 1 mA Min. 3.234 3.168 Typ. 3.3 Max. 3.366 V 3.432 20 V A mV mV Unit Id Quiescent current VI = 4.6 to 20V, IO=500mA VI = 6 V SVR Supply voltage rejection IO = 5 mA, VI = 5.3 1 V f = 1 kHz f = 10 kHz eN Vd VIL VIH II CO Output noise voltage Dropout voltage Control input logic low Control input logic high Control input current Output bypass capacitance B = 10 Hz to 100 KHz IO = 200 mA IO = 500 mA Ta = -40 to 125C Ta = -40 to 125C VI = 6 V, VC = 6 V ESR = 0.1 to 10 IO = 0 to 500 mA , 8/20 KFxxB Electrical characteristics Table 7. Symbol VO VI IO VO VO Electrical characteristics for KF40 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Parameter Output voltage Operating input voltage Output current limit Line regulation Load regulation VI = 5 to 20 V, IO = 5 mA VI = 5.3 V, IO = 5 to 500 mA VI = 5 to 20V, IO = 0mA ON MODE 12 OFF MODE f = 120 Hz 50 78 73 60 50 0.2 0.4 0.35 V 0.7 0.8 2 10 2 10 V V A F V dB 100 A Test conditions IO = 50 mA, VI = 6 V IO = 50 mA, VI = 6 V, Ta = -25 to 85C IO = 500 mA 1 3 2 0.5 18 50 1 mA Min. 3.92 3.84 Typ. 4 Max. 4.08 V 4.16 20 V A mV mV Unit Id Quiescent current VI = 5.3 to 20V, IO=500mA VI = 6 V SVR Supply voltage rejection IO = 5 mA, VI = 6 1 V f = 1 kHz f = 10 kHz eN Vd VIL VIH II CO Output noise voltage Dropout voltage Control input logic low Control input logic high Control input current Output bypass capacitance B = 10 Hz to 100 KHz IO = 200 mA IO = 500 mA Ta = -40 to 125C Ta = -40 to 125C VI = 6 V, VC = 6 V ESR = 0.1 to 10 IO = 0 to 500 mA , 9/20 Electrical characteristics KFxxB Table 8. Symbol VO VI IO VO VO Electrical characteristics for KF50 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Parameter Output voltage Operating input voltage Output current limit Line regulation Load regulation VI = 6 to 20 V, IO = 5 mA VI = 6.3 V, IO = 5 to 500 mA VI = 6 to 20V, IO = 0mA ON MODE 12 OFF MODE f = 120 Hz 50 76 71 60 50 0.2 0.4 0.35 V 0.7 0.8 2 10 2 10 V V A F V dB 100 A Test conditions IO = 50 mA, VI = 7 V IO = 50 mA, VI = 7 V, Ta = -25 to 85C IO = 500 mA 1 3 2 0.5 18 50 1 mA Min. 4.9 4.8 Typ. 5 Max. 5.1 V 5.2 20 V A mV mV Unit Id Quiescent current VI = 6.3 to 20V, IO=500mA VI = 6 V SVR Supply voltage rejection IO = 5 mA, VI = 7 1 V f = 1 kHz f = 10 kHz eN Vd VIL VIH II CO Output noise voltage Dropout voltage Control input logic low Control input logic high Control input current Output bypass capacitance B = 10 Hz to 100 KHz IO = 200 mA IO = 500 mA Ta = -40 to 125C Ta = -40 to 125C VI = 6 V, VC = 6 V ESR = 0.1 to 10 IO = 0 to 500 mA , 10/20 KFxxB Table 9. Symbol VO VI IO VO VO Electrical characteristics Electrical characteristics for KF80 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Parameter Output voltage Operating input voltage Output current limit Line regulation Load regulation VI = 9 to 20 V, IO = 5 mA VI = 9.3 V, IO = 5 to 500 mA VI = 9 to 20V, IO = 0mA ON MODE 12 OFF MODE f = 120 Hz 70 72 67 60 50 0.2 0.4 0.35 V 0.7 0.8 2 10 2 10 V V A F V dB 140 A Test conditions IO = 50 mA, VI = 10 V IO = 50 mA, VI = 10 V, Ta = -25 to 85C IO = 500 mA 1 4 2 0.7 24 50 1.5 mA Min. 7.84 7.68 Typ. 8 Max. 8.16 V 8.32 20 V A mV mV Unit Id Quiescent current VI = 9.3 to 20V, IO=500mA VI = 9 V SVR Supply voltage rejection IO = 5 mA, VI = 10 1 V f = 1 kHz f = 10 kHz eN Vd VIL VIH II CO Output noise voltage Dropout voltage Control input logic low Control input logic high Control input current Output bypass capacitance B = 10 Hz to 100 KHz IO = 200 mA IO = 500 mA Ta = -40 to 125C Ta = -40 to 125C VI = 6 V, VC = 6 V ESR = 0.1 to 10 IO = 0 to 500 mA , 11/20 Typical performance characteristics KFxxB 5 Figure 4. Typical performance characteristics (unless otherwise specified VO(NOM) = 3.3 V) Dropout voltage vs output current Figure 5. Dropout voltage vs temperature Figure 6. Supply current vs input voltage Figure 7. Supply current vs input voltage Figure 8. Short circuit current vs input voltage Figure 9. Supply current vs temperature 12/20 KFxxB Package mechanical data 6 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK(R) 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 box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. 13/20 Package mechanical data KFxxB SO-8 mechanical data Dim. A A1 A2 B C D E e H h L k ddd 0.1 5.80 0.25 0.40 mm. Min. 1.35 0.10 1.10 0.33 0.19 4.80 3.80 1.27 6.20 0.50 1.27 8 (max.) 0.04 0.228 0.010 0.016 Typ. Max. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 Min. 0.053 0.04 0.043 0.013 0.007 0.189 0.150 0.050 0.244 0.020 0.050 inch. Typ. Max. 0.069 0.010 0.065 0.020 0.010 0.197 0.157 0016023/C 14/20 KFxxB Package mechanical data DPAK mechanical data mm. Dim. Min. A A1 A2 B b4 C C2 D D1 E E1 e e1 H L (L1) L2 L4 R V2 2.2 0.9 0.03 0.64 5.2 0.45 0.48 6 5.1 6.4 4.7 2.28 4.4 9.35 1 2.8 0.8 0.6 0.2 0 8 0 1 0.023 0.008 8 4.6 10.1 0.173 0.368 0.039 0.110 0.031 0.039 6.6 0.252 0.185 0.090 0.181 0.397 Typ. Max. 2.4 1.1 0.23 0.9 5.4 0.6 0.6 6.2 Min. 0.086 0.035 0.001 0.025 0.204 0.017 0.019 0.236 0.200 0.260 Typ. Max. 0.094 0.043 0.009 0.035 0.212 0.023 0.023 0.244 inch. 0068772-F 15/20 Package mechanical data KFxxB Tape & reel SO-8 mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 8.1 5.5 2.1 3.9 7.9 12.8 20.2 60 22.4 8.5 5.9 2.3 4.1 8.1 0.319 0.216 0.082 0.153 0.311 Typ. Max. 330 13.2 0.504 0.795 2.362 0.882 0.335 0.232 0.090 0.161 0.319 Min. Typ. Max. 12.992 0.519 inch. 16/20 KFxxB Package mechanical data Tape & reel DPAK-PPAK mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 6.80 10.40 2.55 3.9 7.9 6.90 10.50 2.65 4.0 8.0 12.8 20.2 60 22.4 7.00 10.60 2.75 4.1 8.1 0.268 0.409 0.100 0.153 0.311 0.272 0.413 0.104 0.157 0.315 13.0 Typ. Max. 330 13.2 0.504 0.795 2.362 0.882 0.2.76 0.417 0.105 0.161 0.319 0.512 Min. Typ. Max. 12.992 0.519 inch. 17/20 Order codes KFxxB 7 Table 10. Order codes Order codes Packages Output voltage SO-8 (tape and reel) DPAK (tape and reel) KF15BDT-TR KF25BD-TR KF33BD-TR KF25BDT-TR KF33BDT-TR KF40BDT-TR KF50BD-TR KF50BDT-TR KF80BDT-TR 1.5 V 2.5 V 3.3 V 4V 5V 8V 18/20 KFxxB Revision history 8 Table 11. Date Revision history Document revision history Revision 9 10 11 Order codes updated. Modified: Table 10. Modified: Table 10 on page 18. Changes 06-Jun-2007 14-Dec-2007 21-Feb-2008 19/20 KFxxB Please Read Carefully: 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. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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