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 DPAK SO-8 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 February 2008 KF15B KF40B KF25B KF50B KF33B KF80B Rev 11 1/20 www.st.com 20 Contents KFxxB Contents 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 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2/20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 KFxxB Diagram 1 Diagram Figure 1. Schematic diagram 3/20 Pin configuration KFxxB 2 Pin configuration Figure 2. Pin connections (top view) SO-8 4/20 DPAK KFxxB Maximum ratings 3 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit -0.5 to 20 V VI DC input voltage IO Output current Internally Limited PTOT Power dissipation Internally Limited TSTG Storage temperature range -40 to 150 C TOP Operating junction temperature range -40 to 125 C Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 3. Thermal data Symbol RthJC Figure 3. Parameter Thermal resistance junction-case DPAK SO-8 Unit 8 20 C/W Test circuit 5/20 Electrical characteristics KFxxB 4 Electrical characteristics Table 4. Electrical characteristics for KF15 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 3.5 V 1.47 1.5 1.53 IO = 50 mA, VI = 3.5 V, Ta = -25 to 85C 1.44 1.56 IO = 500 mA 2.5 20 Unit V 1 V A VO Line regulation VI = 2.5 to 20 V, IO = 5 mA 2 12 mV VO Load regulation VI = 2.8 V, IO = 5 to 500 mA 2 50 mV 0.5 1 VI = 2.5 to 20V, IO = 0mA Id Quiescent current Supply voltage rejection mA VI = 2.8 to 20V, IO=500mA VI = 6 V SVR ON MODE IO = 5 mA, VI = 3.5 1 V 12 OFF MODE 50 f = 120 Hz 82 f = 1 kHz 77 f = 10 kHz 60 100 A dB eN Output noise voltage B = 10 Hz to 100 kHz 50 V Vd Dropout voltage IO = 200 mA 1 V VIL Control input logic low Ta = -40 to 125C VIH Control input logic high Ta = -40 to 125C Control input current VI = 6 V, VC = 6 V Output bypass capacitance ESR = 0.1 to 10 , IO = 0 to 500 mA II CO 6/20 0.8 2 2 V V 10 A 10 F KFxxB Table 5. Symbol 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 VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 4.5 V 2.45 2.5 2.55 IO = 50 mA, VI = 4.5 V, Ta = -25 to 85C 2.4 Unit V 2.6 IO = 500 mA 20 1 V A VO Line regulation VI = 3.5 to 20 V, IO = 5 mA 2 12 mV VO Load regulation VI = 3.8 V, IO = 5 to 500 mA 2 50 mV 0.5 1 VI = 3.5 to 20V, IO = 0mA Id Quiescent current Supply voltage rejection IO = 5 mA, VI = 4.5 1 V 12 OFF MODE 50 f = 120 Hz 82 f = 1 kHz 77 f = 10 kHz 60 eN Output noise voltage Vd Dropout voltage VIL Control input logic low Ta = -40 to 125C VIH Control input logic high Ta = -40 to 125C Control input current VI = 6 V, VC = 6 V Output bypass capacitance ESR = 0.1 to 10 , IO = 0 to 500 mA II CO mA VI = 3.8 to 20V, IO=500mA VI = 6 V SVR ON MODE 100 A dB B = 10 Hz to 100 KHz 50 V IO = 200 mA 0.2 0.35 IO = 500 mA 0.4 0.7 V 0.8 2 2 V V 10 A 10 F 7/20 Electrical characteristics Table 6. Symbol KFxxB Electrical characteristics for KF33 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 5.3 V 3.234 3.3 3.366 IO = 50 mA, VI = 5.3 V, Ta = -25 to 85C 3.168 Unit V 3.432 IO = 500 mA 20 1 V A VO Line regulation VI = 4.3 to 20 V, IO = 5 mA 2 12 mV VO Load regulation VI = 4.6 V, IO = 5 to 500 mA 2 50 mV 0.5 1 VI = 4.3 to 20V, IO = 0mA Id Quiescent current Supply voltage rejection IO = 5 mA, VI = 5.3 1 V 12 OFF MODE 50 f = 120 Hz 80 f = 1 kHz 75 f = 10 kHz 60 eN Output noise voltage Vd Dropout voltage VIL Control input logic low Ta = -40 to 125C VIH Control input logic high Ta = -40 to 125C Control input current VI = 6 V, VC = 6 V Output bypass capacitance ESR = 0.1 to 10 , IO = 0 to 500 mA II CO 8/20 mA VI = 4.6 to 20V, IO=500mA VI = 6 V SVR ON MODE 100 A dB B = 10 Hz to 100 KHz 50 V IO = 200 mA 0.2 0.35 IO = 500 mA 0.4 0.7 V 0.8 2 2 V V 10 A 10 F KFxxB Table 7. Symbol Electrical characteristics Electrical characteristics for KF40 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 6 V 3.92 4 4.08 IO = 50 mA, VI = 6 V, Ta = -25 to 85C 3.84 Unit V 4.16 IO = 500 mA 20 1 V A VO Line regulation VI = 5 to 20 V, IO = 5 mA 3 18 mV VO Load regulation VI = 5.3 V, IO = 5 to 500 mA 2 50 mV 0.5 1 VI = 5 to 20V, IO = 0mA Id Quiescent current Supply voltage rejection IO = 5 mA, VI = 6 1 V 12 OFF MODE 50 f = 120 Hz 78 f = 1 kHz 73 f = 10 kHz 60 eN Output noise voltage Vd Dropout voltage VIL Control input logic low Ta = -40 to 125C VIH Control input logic high Ta = -40 to 125C Control input current VI = 6 V, VC = 6 V Output bypass capacitance ESR = 0.1 to 10 , IO = 0 to 500 mA II CO mA VI = 5.3 to 20V, IO=500mA VI = 6 V SVR ON MODE 100 A dB B = 10 Hz to 100 KHz 50 V IO = 200 mA 0.2 0.35 IO = 500 mA 0.4 0.7 V 0.8 2 2 V V 10 A 10 F 9/20 Electrical characteristics Table 8. Symbol KFxxB Electrical characteristics for KF50 (refer to the test circuits, TJ = 25 C, CI = 0.1 F, CO = 2.2 F unless otherwise specified.) Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 7 V 4.9 5 5.1 IO = 50 mA, VI = 7 V, Ta = -25 to 85C 4.8 Unit V 5.2 IO = 500 mA 20 1 V A VO Line regulation VI = 6 to 20 V, IO = 5 mA 3 18 mV VO Load regulation VI = 6.3 V, IO = 5 to 500 mA 2 50 mV 0.5 1 VI = 6 to 20V, IO = 0mA Id Quiescent current Supply voltage rejection IO = 5 mA, VI = 7 1 V 12 OFF MODE 50 f = 120 Hz 76 f = 1 kHz 71 f = 10 kHz 60 eN Output noise voltage Vd Dropout voltage VIL Control input logic low Ta = -40 to 125C VIH Control input logic high Ta = -40 to 125C Control input current VI = 6 V, VC = 6 V Output bypass capacitance ESR = 0.1 to 10 , IO = 0 to 500 mA II CO 10/20 mA VI = 6.3 to 20V, IO=500mA VI = 6 V SVR ON MODE 100 A dB B = 10 Hz to 100 KHz 50 V IO = 200 mA 0.2 0.35 IO = 500 mA 0.4 0.7 V 0.8 2 2 V V 10 A 10 F KFxxB Table 9. Symbol 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 VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 10 V 7.84 8 8.16 IO = 50 mA, VI = 10 V, Ta = -25 to 85C 7.68 Unit V 8.32 IO = 500 mA 20 1 V A VO Line regulation VI = 9 to 20 V, IO = 5 mA 4 24 mV VO Load regulation VI = 9.3 V, IO = 5 to 500 mA 2 50 mV 0.7 1.5 VI = 9 to 20V, IO = 0mA Id Quiescent current Supply voltage rejection IO = 5 mA, VI = 10 1 V 12 OFF MODE 70 f = 120 Hz 72 f = 1 kHz 67 f = 10 kHz 60 eN Output noise voltage Vd Dropout voltage VIL Control input logic low Ta = -40 to 125C VIH Control input logic high Ta = -40 to 125C Control input current VI = 6 V, VC = 6 V Output bypass capacitance ESR = 0.1 to 10 , IO = 0 to 500 mA II CO mA VI = 9.3 to 20V, IO=500mA VI = 9 V SVR ON MODE 140 A dB B = 10 Hz to 100 KHz 50 V IO = 200 mA 0.2 0.35 IO = 500 mA 0.4 0.7 V 0.8 2 2 V V 10 A 10 F 11/20 Typical performance characteristics KFxxB 5 Typical performance characteristics Figure 4. (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 6 Package mechanical data 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. mm. Min. Typ. inch. Max. Min. Typ. Max. A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 E 3.80 4.00 0.150 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ddd 8 (max.) 0.1 0.04 0016023/C 14/20 KFxxB Package mechanical data DPAK mechanical data mm. inch. Dim. Min. A A1 A2 B b4 C C2 D D1 E E1 e e1 H L (L1) L2 L4 R V2 Typ. 2.2 0.9 0.03 0.64 5.2 0.45 0.48 6 Max. Min. 2.4 1.1 0.23 0.9 5.4 0.6 0.6 6.2 0.086 0.035 0.001 0.025 0.204 0.017 0.019 0.236 6.6 0.252 5.1 6.4 0.260 0.173 0.368 0.039 2.8 0.8 0.181 0.397 0.110 0.031 1 0.023 0.2 0 0.094 0.043 0.009 0.035 0.212 0.023 0.023 0.244 0.185 0.090 4.6 10.1 0.6 Max. 0.200 4.7 2.28 4.4 9.35 1 Typ. 0.039 0.008 8 0 8 0068772-F 15/20 Package mechanical data KFxxB Tape & reel SO-8 mechanical data mm. inch. Dim. Min. A Max. Min. 330 13.2 Typ. Max. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 16/20 Typ. 0.504 22.4 0.519 0.882 Ao 8.1 8.5 0.319 0.335 Bo 5.5 5.9 0.216 0.232 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 KFxxB Package mechanical data Tape & reel DPAK-PPAK mechanical data mm. inch. Dim. Min. Typ. A Max. Min. Typ. 330 13.0 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 Max. 0.504 0.512 22.4 0.519 0.882 Ao 6.80 6.90 7.00 0.268 0.272 0.2.76 Bo 10.40 10.50 10.60 0.409 0.413 0.417 Ko 2.55 2.65 2.75 0.100 0.104 0.105 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 7.9 8.0 8.1 0.311 0.315 0.319 17/20 Order codes KFxxB 7 Order codes Table 10. Order codes Packages Output voltage SO-8 (tape and reel) KF15BDT-TR 1.5 V KF25BD-TR KF25BDT-TR 2.5 V KF33BD-TR KF33BDT-TR 3.3 V KF40BDT-TR 4V KF50BDT-TR 5V KF80BDT-TR 8V KF50BD-TR 18/20 DPAK (tape and reel) KFxxB Revision history 8 Revision history Table 11. Document revision history Date Revision Changes 06-Jun-2007 9 Order codes updated. 14-Dec-2007 10 Modified: Table 10. 21-Feb-2008 11 Modified: Table 10 on page 18. 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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