LDS3985M285R

LDS3985xx Ultra low drop-low noise BiCMOS 300 mA voltage regulator for use with very low ESR output capacitor Features ■ ■ ■ ■ Input voltage from 2.5 V to 6 V Stable with low ESR ceramic capacitors Ultra low dropout voltage (150 mV typ. at 300 mA load, 0.4 mV typ. at 1 mA load) Very low quiescent current (85 µA typ. at no load, 200 µA typ. at 300 mA load; max 1.5 µA in off mode) Guaranteed output current up to 300 mA Wide range of output voltage: – from 1.25 V to 5.0 V Fast turn-on time: typ. 240 µs – [CO = 2.2 µF, CBYP = 33 nF and IO = 1 mA] Logic-controlled electronic shutdown Internal current and thermal limit Output low noise voltage 30 µVRMS over 10 Hz to 100 kHz SVR of 55 dB at 1 kHz, 50 dB at 10 kHz Temperature range: - 40 °C to 125 °C makes it suitable for low power applications and in battery powered systems. Regulator ground current increases only slightly in dropout, further prolonging the battery life. 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. Typical applications are in mobile phone and similar battery powered wireless systems, portable information appliances. DFN6 SOT23-5L ■ ■ ■ ■ ■ ■ ■ ■ Description The LDS3985xx provides up to 300 mA, from 2.5 V to 6 V input voltage. It is stable with ceramic and high quality tantalum capacitor. The ultra low drop voltage, low quiescent current and low noise Table 1. Device summary Part numbers LDS3985XX15 LDS3985XX18 LDS3985XX25 LDS3985XX28 LDS3985XX30 LDS3985XX33 LDS3985XX50 Output voltages 1.5 V 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V 5.0 V July 2010 Doc ID 11039 Rev 7 1/20 www.st.com 20 Contents LDS3985xx 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2/20 Doc ID 11039 Rev 7 LDS3985xx Diagram 1 Figure 1. Diagram Schematic diagram Doc ID 11039 Rev 7 3/20 Pin configuration LDS3985xx 2 Figure 2. Pin configuration Pin connections (top view for SOT23-5L, top through view for DFN6) SOT23-5L DFN6 Table 2. Pin n° for SOT23-5L 1 2 3 4 5 - Pin description Pin n° for DFN6 1 5 6 4 3 2 Symbol VI GND VINH BYPASS VO N.C. 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 Not connect Name and function 4/20 Doc ID 11039 Rev 7 LDS3985xx Typical application 3 Figure 3. Typical application Typical application circuit Doc ID 11039 Rev 7 5/20 Maximum ratings LDS3985xx 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) Symbol VI VO VINH IO PD TSTG TOP Unit V V V -0.3 to VI+0.3 -0.3 to VI+0.3 Internally limited Internally limited -65 to 150 -40 to 125 °C °C 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 81 255 DFN6 10 55 Unit °C/W °C/W Table 4. Symbol RthJC RthJA 6/20 Doc ID 11039 Rev 7 LDS3985xx Electrical characteristics 5 Electrical characteristics TJ = 25 °C, VI = VO(NOM) + 0.5 V, CI = 1 µF, CO = 2.2 µF, CBYP = 33 nF, IO = 1 mA, VINH = 1.4 V, unless otherwise specified. Table 5. Symbol VI VO Electrical characteristics for LDS3985xx Parameter Operating input voltage Output voltage < 2.5 V IO = 1 mA TJ = - 40 to 125 °C Output voltage ≥ 2.5 V IO = 1 mA TJ= - 40 to 125 °C Line regulation (1) VI = VO(NOM) + 0.5 to 6 V, TJ = - 40 to 125 °C VO = 4.7 to 5 V IO = 1 mA to 300 mA, VO ≤ 2.5 V TJ = - 40 to 125 °C IO = 1 mA to 300 mA, VO ≥ 2.5 V TJ = - 40 to 125 °C VI = VO(NOM) + 1 V, IO = 300 mA, tR = tF = 30 µs IO = 0 IO = 0, TJ = - 40 to 125 °C Quiescent current ON MODE: VINH = 1.24 V I = 0 to 300 mA O IO = 0 to 300 mA, TJ = - 40 to 125 °C 0.003 OFF MODE: VINH = 0.4 V TJ = - 40 to 125 °C IO = 1 mA IO = 1 mA, TJ = -40 to 125 °C 0.4 2 60 mV 100 150 250 600 f = 1 kHz f = 10 kHz 300 55 dB 50 550 mA mA 1.5 Test conditions Min. 2.5 -50 -75 -2 -3 -0.1 -0.19 0.005 0.0008 5 85 150 200 µA 300 Typ. Max. 6 50 mV 75 2 3 0.1 %/V 0.19 0.01 0.004 %/mA %/mA mVPP % of VO(NOM) Unit V VO ΔVO ΔVO ΔVO ΔVO Load regulation Load regulation Output AC line regulation (2) IQ VDROP Dropout voltage (3) IO = 150 mA IO = 150 mA, TJ = - 40 to 125 °C IO = 300 mA IO = 300 mA, TJ = - 40 to 125 °C ISC Short circuit current RL = 0 VI = VO(NOM)+0.25 V ± VRIPPLE = 0.1 V, IO = 50 mA For VO(NOM) < 2.5 V, VI = 2.55 V VO ≥ VO(NOM) - 5 % SVR Supply voltage rejection IO(PK) Peak output current Doc ID 11039 Rev 7 7/20 Electrical characteristics Table 5. Symbol VINH IINH eN tON TSHDN CO LDS3985xx Electrical characteristics for LDS3985xx (continued) Parameter Inhibit input logic Low Inhibit input logic High Inhibit input current Output noise voltage Turn On time (4) Test conditions VI = 2.5 V to 6 V, TJ= - 40 to 125 °C VINH = 0.4 V, VI = 6 V BW = 10 Hz to 100 kHz, CO = 2.2 µF CBYP = 33 nF (5) Min. Typ. Max. 0.4 Unit V 1.4 ±1 30 240 160 2.2 5 22 5000 nA µVRMS µs °C µF mΩ Thermal shutdown Output capacitor Capacitance ESR 1. For VO(NOM) < 2 V, VI = 2.5 V 2. For VO(NOM) = 1.25 V, VI = 2.5 V 3. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This specification does not apply for input voltages below 2.5 V 4. 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 5. Typical thermal protection hysteresis is 20 °C 8/20 Doc ID 11039 Rev 7 LDS3985xx Typical performance characteristics 6 Typical performance characteristics TJ = 25 °C, VI = VO(NOM) + 0.5 V, CI = 1 µF, CO = 2.2 µF, CBYP = 33 nF, IO = 1 mA, VINH = 1.4 V, unless otherwise specified. Output voltage vs. temp. (VI = 2.5 V) Figure 5. Output voltage vs. temp. (VI = 3.2 V) Figure 4. Figure 6. Output voltage vs. temp. (VI = 3.8 V) Figure 7. Shutdown voltage vs. temperature (VO = 1.35 V) Figure 8. Shutdown voltage vs. temperature (VO = 3.3 V) Figure 9. Line regulation vs. temperature (VI = 2.5 V to 6 V) Doc ID 11039 Rev 7 9/20 Typical performance characteristics LDS3985xx Figure 10. Line regulation vs. temperature (VI = 3.2 V to 6 V) Figure 11. Line regulation vs. temperature (VI = 3.8 V to 6 V) Figure 12. Quiescent current vs. temperature (VI = 2.5 V) Figure 13. Quiescent current vs. temperature (VI = 6 V) Figure 14. Quiescent current vs. temperature (VI = 3.4 V) Figure 15. Supply voltage rejection vs. frequency 10/20 Doc ID 11039 Rev 7 LDS3985xx Typical performance characteristics Figure 16. Dropout voltage vs. temperature Figure 17. Dropout voltage vs. output current Figure 18. Inhibit transient VI = 5 V, IO = 1 mA, VINH = 0 to 1.2 V, CI = CO = 1 µF (cer), CBYP = 10 nF, TR = TF = 1 µs Doc ID 11039 Rev 7 11/20 Package mechanical data LDS3985xx 7 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. 12/20 Doc ID 11039 Rev 7 LDS3985xx Package mechanical data 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 Doc ID 11039 Rev 7 13/20 Package mechanical data LDS3985xx DFN6 (3x3 mm) mechanical data mm. Dim. Min. A A1 A3 b D D2 E E2 e L 0.30 0.23 2.90 2.23 2.90 1.50 0.80 0 Typ. 0.90 0.02 0.20 0.30 3.00 2.38 3.00 1.65 0.95 0.40 0.50 0.012 0.38 3.10 2.48 3.10 1.75 0.009 0.114 0.088 0.114 0.059 Max. 1.00 0.05 Min. 0.031 0 Typ. 0.035 0.001 0.008 0.012 0.118 0.094 0.118 0.065 0.037 0.016 0.020 0.015 0.122 0.098 0.122 0.069 Max. 0.039 0.002 inch. 7946637A 14/20 Doc ID 11039 Rev 7 LDS3985xx Package mechanical data DFN6D (3x3 mm) mechanical data mm. Dim. Min. A A1 A3 b D D2 E E2 e L 0.30 0.23 2.90 2.23 2.90 1.50 0.95 0.40 0.50 0.012 3.00 3.00 0.80 0 0.02 0.20 0.45 3.10 2.50 3.10 1.75 0.009 0.114 0.088 0.114 0.059 0.037 0.016 0.020 0.118 0.118 Typ. Max. 1.00 0.05 Min. 0.031 0 0.001 0.008 0.018 0.122 0.098 0.122 0.069 Typ. Max. 0.039 0.002 inch. 7946637B Doc ID 11039 Rev 7 15/20 Package mechanical data LDS3985xx 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. 16/20 Doc ID 11039 Rev 7 LDS3985xx Package mechanical data Tape & reel QFNxx/DFNxx (3x3) mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 3.3 3.3 1.1 4 8 12.8 20.2 60 14.4 0.130 0.130 0.043 0.157 0.315 Typ. Max. 180 13.2 0.504 0.795 2.362 0.567 Min. Typ. Max. 7.087 0.519 inch. Doc ID 11039 Rev 7 17/20 Order codes LDS3985xx 8 Table 6. Order codes Order codes Packages Output voltage SOT23-5L LDS3985M125R (1) LDS3985M135R (1) DFN6 LDS3985PM12R (1) LDS3985PM13R LDS3985PM15R LDS3985PM18R (1) (1) (1) DFN6D 1.25 V 1.35 V LDS3985PU15R 1.5 V 1.8 V 2.0 V 2.1 V 2.2 V 2.5 V 2.6 V 2.7 V LDS3985PU28R 2.8 V 2.85 V 2.9 V 3.0 V LDS3985PU33R 3.3 V 4.7 V 4.8 V 4.9 V 5.0 V LDS3985M15R LDS3985M18R LDS3985M20R (1) LDS3985M21R LDS3985M22R (1) (1) LDS3985PM20R (1) LDS3985PM21R LDS3985PM22R LDS3985PM25R (1) (1) (1) LDS3985M25R LDS3985M26R (1) LDS3985M27R (1) LDS3985PM26R (1) LDS3985PM27R (1) LDS3985M28R LDS3985M285R (1) LDS3985PM285R (1) LDS3985M29R (1) LDS3985M30R LDS3985M33R LDS3985M47R (1) LDS3985PM29R (1) LDS3985PM30R (1) LDS3985PM47R (1) LDS3985M48R (1) LDS3985M49R (1) LDS3985PM48R (1) LDS3985PM49R LDS3985PM50R (1) (1) LDS3985M50R 1. Available on request. 18/20 Doc ID 11039 Rev 7 LDS3985xx Revision history 9 Table 7. Date Revision history Document revision history Revision 1 2 3 4 5 6 7 First release. Added: new package TSOT23-5L. Added: new mechanical data DFN6D and order codes updated. Added: Table 1 in cover page. Modified: Table 6 on page 18. Modified: Table 6 on page 18. Modified: Table 1 on page 1 and Table 6 on page 18. Changes 02-Dec-2004 10-Apr-2007 16-May-2007 06-Sep-2007 11-Jun-2008 11-Jul-2009 29-Jul-2010 Doc ID 11039 Rev 7 19/20 LDS3985xx 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. 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