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| LD3985xx Ultra low drop-low noise BiCMOS voltage regulators low ESR capacitors compatible Features Input voltage from 2.5 V to 6 V Stable with low ESR ceramic capacitors Ultra low dropout voltage (100 mV typ. at 150 mA load, 0.4 mV typ. at 1 mA load) Very low quiescent current (85 A typ. at no load, 170 A typ. at 150 mA load; max 1.5 A in OFF mode) Guaranteed output current up to 150 mA Wide range of output voltage: 1.22 V; 1.8 V; 2.5 V; 2.6 V; 2.7 V; 2.8 V; 2.9 V; 3 V; 3.3 V; 4.7 V Fast turn-on time: typ. 200 s [CO = 1 F, CBYP = 10 nF and IO = 1 mA] Logic-controlled electronic shutdown Internal current and thermal limit Output low noise voltage 30 VRMS over 10 Hz to 100 kHz S.V.R. of 60 dB at 1 kHz, 50 dB at 10 kHz Temperature range: -40 C to 125 C The ultra low drop-voltage, low quiescent current and low noise make it suitable for low power applications and in battery powered systems. Regulator ground current increases only slightly in dropout, further prolonging the battery life. Power supply rejection is better than 60 dB at low frequencies and starts to roll off at 10 kHz. High power supply rejection is maintained down to low input voltage levels common to battery operated circuits. Shutdown logic control function is available, this means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. The LD3985xx is designed to work with low ESR ceramic capacitors. Typical applications are in mobile phone and similar battery powered wireless systems. Flip-chip (1.57x1.22) SOT23-5L TSOT23-5L Description The LD3985xx provides up to 150 mA, from 2.5 V to 6 V input voltage. Table 1. Device summary Part number LD3985XX122 LD3985XX18 LD3985XX25 LD3985XX26 LD3985XX27 LD3985XX28 LD3985XX29 LD3985XX30 LD3985XX33 LD3985XX47 Rev 12 1/22 www.st.com 22 December 2007 LD3985xx Contents 1 2 3 4 5 6 7 8 9 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2/22 LD3985xx Diagram 1 Figure 1. Diagram Schematic diagram 3/22 Pin configuration LD3985xx 2 Figure 2. Pin configuration Pin connections (top view for SOT and TSOT, top through view for Flip-chip) SOT23-5L/TSOT23-5L Flip-chip Table 2. Pin n for SOT23-5L/ TSOT23-5L 1 2 3 4 5 Pin description Pin n for Flip-chip 4 2 1 5 3 Symbol VI GND VINH BYPASS VO Input voltage of the LDO Common ground Inhibit input voltage: ON MODE when VINH 1.2 V, OFF MODE when VINH 0.4 V (Do not leave floating, not internally pulled down/up) Bypass pin: connect an external capacitor (usually 10 nF) to minimize noise voltage Output voltage of the LDO Name and function 4/22 LD3985xx Typical application 3 Figure 3. Typical application Typical application circuit 5/22 Maximum ratings LD3985xx 4 Table 3. Maximum ratings Absolute maximum ratings Parameter DC input voltage DC output voltage INHIBIT input voltage Output current Power dissipation Storage temperature range Operating junction temperature range Value -0.3 to 6 (1) -0.3 to VI+0.3 -0.3 to VI+0.3 Internally limited Internally limited -65 to 150 -40 to 125 C C Unit V V V Symbol VI VO VINH IO PD TSTG TOP 1. The input pin is able to withstand non repetitive spike of 6.5 V for 200 ms. 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 Thermal resistance junction-ambient SOT23-5L/ TSOT23 81 255 170 Flip-chip Unit C/W C/W Table 4. Symbol RthJC RthJA 6/22 LD3985xx Electrical characteristics 5 Table 5. Symbol VI VO Electrical characteristics Electrical characteristics for LD3985 (TJ = 25 C, VI = VO(NOM) +0.5 V, CI = 1 F, CBYP = 10 nF, IO = 1 mA, VINH = 1.4 V, unless otherwise specified) Parameter Operating input voltage Output voltage < 2.5V IO = 1 mA TJ= -40 to 125C Output voltage 2.5V IO = 1 mA TJ= -40 to 125C VI = VO(NOM) + 0.5 to 6 V TJ= -40 to 125C VO = 4.7 to 5V VO Load regulation IO = 1 mA to 150mA, VO < 2.5V TJ= -40 to 125C IO = 1 mA to 150mA, VO 2.5V TJ= -40 to 125C (for flip-chip) IO = 1 mA to 150mA, TJ= -40 to 125C (for SOT23-5L/TSOT23-5L), VO 2.5V Output AC Line regulation VI = VO(NOM) + 1 V, IO = 150mA, tR= tF = 30s IO = 0 Quiescent current ON MODE: VINH = 1.2V IQ IO = 0, TJ= -40 to 125C IO = 0 to 150mA IO = 0 to 150mA, TJ= -40 to 125C 0.003 OFF MODE: VINH = 0.4V TJ= -40 to 125C IO = 1mA IO = 1mA, TJ= -40 to 125C IO = 50mA 20 35 mV 45 70 60 100 600 f = 1kHz f = 10kHz 60 dB 50 mA 0.4 2 1.5 170 A 250 Test conditions Min. 2.5 -50 -75 -2 -3 -0.1 -0.19 0.002 0.0004 0.0025 1.5 85 150 Typ. Max. 6 50 mV 75 2 3 0.1 %/V 0.19 0.008 0.002 %/mA 0.005 mVPP %/mA % of VO(NOM) Unit V VO VO Line regulation (Note: 1) VO Load regulation VO VDROP Dropout voltage (Note: 1) IO = 50mA, TJ= -40 to 125C IO = 100mA IO = 100mA, TJ= -40 to 125C IO = 150mA IO = 150mA, TJ= -40 to 125C ISC SVR Short circuit current Supply voltage rejection RL = 0 VI = VO(NOM)+0.25V VRIPPLE = 0.1V, IO= 50mA VO(NOM) < 2.5V, VI = 2.55V 7/22 Electrical characteristics Table 5. Symbol IO(PK) VINH IINH eN tON TSHDN CO LD3985xx Electrical characteristics for LD3985 (continued) (TJ = 25 C, VI = VO(NOM) +0.5 V, CI = 1 F, CBYP = 10 nF, IO = 1 mA, VINH = 1.4 V, unless otherwise specified) Parameter Peak output current Inhibit input logic low Inhibit input logic high Inhibit input current Output noise voltage Turn On time (Note 4) Thermal shutdown Output capacitor ESR 5 5000 m VI = 2.5V to 6V, TJ= -40 to 125C VINH = 0.4V, VI = 6V BW = 10 Hz to 100 kHz, CO = 1F CBYP = 10 nF Note 5 Capacitance (Note 6) 1 1.2 1 30 100 160 22 250 nA VRMS s C F Test conditions VO VO(NOM) - 5% Min. 300 Typ. 550 0.4 V Max. Unit mA Note: 1 2 3 For VO(NOM) < 2 V, VI = 2.5 V For VO(NOM)= 1.25 V, VI = 2.5 V Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. This specification does not apply for input voltages below 2.5V. Turn-on time is time measured between the enable input just exceeding VINH High Value and the output voltage just reaching 95% of its nominal value Typical thermal protection hysteresis is 20 C The minimum capacitor value is 1 F, anyway the LD3985 is still stable if the compensation capacitor has a 30 % tolerance in all temperature range. 4 5 6 8/22 LD3985xx Typical performance characteristics 6 Typical performance characteristics (TJ = 25 C, VI = VO(NOM) +0.5 V, CI = CO = 1 F, CBYP = 10 nF, IO = 1mA, VINH = 1.4 V, unless otherwise specified) Output voltage vs temperature Figure 5. Output voltage vs temperature Figure 4. Figure 6. Output voltage vs temperature Figure 7. Shutdown voltage vs temperature Figure 8. Shutdown voltage vs temperature Figure 9. Line regulation vs temperature 9/22 Typical performance characteristics LD3985xx Figure 10. Line regulation vs temperature Figure 11. Line regulation vs temperature Figure 12. Load regulation vs temperature Figure 13. Load regulation vs temperature Figure 14. Load regulation vs temperature Figure 15. Quiescent current vs temperature 10/22 LD3985xx Typical performance characteristics Figure 16. Quiescent current vs temperature Figure 17. Quiescent current vs temperature Figure 18. Supply voltage rejection vs frequency Figure 19. Load transient response VI = 3.2V, IO = 1 to 150mA, Rise-Fall time = 1sec Figure 20. Line transient response Figure 21. Start-Up VI = 3.8V to 4.4V, TJ = 25C, IO = 150mA, CI = CO = 1F (X7R), CBYP = 10nF, Rise-Fall time = 1sec, VO = 2.7V VI = 3.3V, IO = 1mA, CI = CO = 1F (cer), CBYP = 10nF, Tr = 20ns, VO = 2.8V 11/22 Typical performance characteristics LD3985xx Figure 22. Turn-Off VI = 3.3V, IO = 1mA, CI = CO = 1mF (cer), CBYP = 10nF, Tf = 20ns, VO = 2.8V 12/22 LD3985xx Package mechanical data 7 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. 13/22 Package mechanical data LD3985xx SOT23-5L mechanical data mm. Dim. Min. A A1 A2 b C D E e H L 2.60 0.10 0.90 0.00 0.90 0.35 0.09 2.80 1.50 0.95 3.00 0.60 102.3 3.9 Typ. Max. 1.45 0.10 1.30 0.50 0.20 3.00 1.75 Min. 35.4 0.0 35.4 13.7 3.5 110.2 59.0 37.4 118.1 23.6 Typ. Max. 57.1 3.9 51.2 19.7 7.8 118.1 68.8 mils. 7049676D 14/22 LD3985xx Package mechanical data TSOT23-5L mechanical data mm. Dim. Min. A A1 A2 b C D E E1 e e1 L 0.3 0 0.7 0.3 0.08 2.9 2.8 1.6 0.95 1.9 0.6 11.8 Typ. Max. 1.1 0.1 1.0 0.5 0.2 27.6 11.8 3.1 114.2 110.2 63.0 37.4 74.8 23.6 Min. Typ. Max. 43.3 3.9 39.4 19.7 7.9 mils. 7282780B 15/22 Package mechanical data LD3985xx Flip-chip 5 mechanical data mm. Dim. Min. A A1 A2 b D E e e1 f f1 0.635 0.21 0.375 0.290 1.510 1.16 0.45 0.816 Typ. 0.7 0.25 0.40 0.315 1.540 1.19 0.5 0.866 0.345 0.337 Max. 0.765 0.29 0.425 0.340 1.570 1.22 0.55 0.916 Min. 25.0 8.3 14.8 11.4 59.4 45.7 17.7 32.1 Typ. 27.6 9.8 15.7 12.4 6.1 46.8 19.7 34.1 13.6 13.3 Max. 30.1 11.4 16.7 13.4 61.8 48.0 21.7 36.1 mils. 16/22 LD3985xx Package mechanical data Tape & reel SOT23-xL mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 3.13 3.07 1.27 3.9 3.9 3.23 3.17 1.37 4.0 4.0 12.8 20.2 60 14.4 3.33 3.27 1.47 4.1 4.1 0.123 0.120 0.050 0.153 0.153 0.127 0.124 0.054 0.157 0.157 13.0 Typ. Max. 180 13.2 0.504 0.795 2.362 0.567 0.131 0.128 0.0.58 0.161 0.161 0.512 Min. Typ. Max. 7.086 0.519 inch. 17/22 Package mechanical data LD3985xx Tape & reel Flip-chip 5 mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 1.60 1.27 0.76 3.9 3.9 1.65 1.32 0.81 4 4 12.8 20.2 49 50 51 12.4 1.70 1.37 0.86 4.1 4.1 0.063 0.050 0.030 0.153 0.153 0.065 0.052 0.032 0.157 0.157 Typ. Max. 178 13.2 0.504 0.795 1.929 1.969 2.008 0.488 0.067 0.054 0.034 0.161 0.161 Min. Typ. Max. 6.926 0.519 inch. 18/22 LD3985xx Package mechanical data Tape & reel TSOT23-5L mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 3.13 3.07 1.27 3.9 3.9 3.23 3.17 1.37 4.0 4.0 12.8 20.2 60 14.4 3.33 3.27 1.47 4.1 4.1 0.123 0.120 0.050 0.153 0.153 0.127 0.124 0.054 0.157 0.157 13.0 Typ. Max. 180 13.2 0.504 0.795 2.362 0.567 0.131 0.128 0.0.58 0.161 0.161 0.512 Min. Typ. Max. 7.086 0.519 inch. 19/22 Order codes LD3985xx 8 Table 6. Order codes Order codes Packages SOT23-5L LD3985M122R LD3985M18R LD3985M25R LD3985M26R (1) TSOT23-5L LD3985G122R (1) LD3985G18R LD3985G25R LD3985G26R (1) Flip-chip Output voltage 1.22 V LD3985J18R LD3985J25R LD3985J26R 1.8 V 2.5 V 2.6 V 2.7 V LD3985M27R LD3985M28R LD3985M29R LD3985M30R LD3985M33R LD3985M47R 1. Available on request. LD3985G27R LD3985G28R LD3985G29R LD3985G30R LD3985G33R LD3985G47R LD3985J33R LD3985J28R LD3985J29R 2.8 V 2.9 V 3.0 V 3.3 V 4.7 V 20/22 LD3985xx Revision history 9 Table 7. Date Revision history Document revision history Revision 6 7 8 9 10 11 12 Changes Part number status changed on table 3. tON values are changed on table 5. Order codes changed - Table 3. Improved drawing quality for figures 19-20-21-22. Order codes updated. Order code change. Modified: Table 1, Table 6, mechanical data for flip-chip. 07-May-2004 05-Oct-2004 27-Oct-2004 17-Mar-2005 10-Apr-2007 08-Jun-2007 20-Dec-2007 21/22 LD3985xx 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. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST'S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER'S OWN RISK. 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