LDK ma low quiescent current very low noise LDO. Applications. Description. Features

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1 LDK13 3 ma low quiescent current very low noise LDO Applications Datasheet - production data Mobile phones Personal digital assistants (PDAs) Cordless phones and similar battery-powered systems Digital still cameras Description Features Input voltage from 1.9 to 5.5 V Very low dropout voltage (1 mv typ. at 1 ma load) Low quiescent current (max. 12 µa, 1 µa in OFF mode) Very low noise Output voltage tolerance: ± C 3 ma guaranteed output current Wide range of fixed output voltages available on request: from.8 V to 3.5 V with 1 mv step The LDK13 low drop voltage regulator provides 3 ma of maximum current from an input supply voltage in the range of 1.9 V to 5.5 V, with a typical dropout voltage of 1 mv. It is stabilized with a ceramic capacitor on the output. The very low drop voltage, low quiescent current and low noise features make it suitable for low power battery-powered applications. An enable logic control function puts the LDK13 in shutdown mode allowing a total current consumption lower than 1 µa. The device also includes a short-circuit constant current limiting and thermal protection. Adjustable version: from.8 V to V IN -V drop Logic-controlled electronic shutdown Compatible with ceramic capacitor C OUT = 1 µf Internal current and thermal limit Available in SOT23-5L, SOT323-5L and DFN6 (1.2 x 1.3 mm) packages Temperature range: -4 C to 125 C March 214 DocID2421 Rev 3 1/27 This is information on a product in full production. 27

2 Contents LDK13 Contents 1 Diagram Pin configuration Typical application Maximum ratings Electrical characteristics Typical performance characteristics Package mechanical data Packaging mechanical data Order codes Revision history /27 DocID2421 Rev 3

3 LDK13 List of tables List of tables Table 1. Pin description (SOT23-5L, SOT323-5L) Table 2. Absolute maximum ratings Table 3. Thermal data Table 4. Electrical characteristics for LDK13 (fixed version) Table 5. Electrical characteristics for LDK13 (adjustable version) Table 6. SOT23-5L mechanical data Table 7. DFN6L (1.2 x 1.3 mm) mechanical data Table 8. SOT323-5L mechanical data Table 9. SOT23-5L tape and reel mechanical data Table 1. SOT323-xL tape and reel mechanical data Table 11. Order codes Table 12. Marking Table 13. Document revision history DocID2421 Rev 3 3/27

4 List of figures LDK13 List of figures Figure 1. Block diagram Figure 2. Pin connection (top view) Figure 3. Typical application circuits for fixed version Figure 4. Typical application circuits for adjustable version Figure 5. Output voltage vs. temp. for adjustable (I O = 1 ma) Figure 6. Output voltage vs. temp. for adjustable version (I O = 3 ma) Figure 7. Output voltage vs. temp. for fixed version (I O = 1 ma) Figure 8. Output voltage vs. temp. for fixed version (I O = 3 ma) Figure 9. Line regulation vs. temp. for adjustable version Figure 1. Short-circuit current vs. temp. for adjustable version Figure 11. Load regulation vs. temp. for adjustable version Figure 12. Load regulation vs. temp. for fixed version Figure 13. Enable pin thresholds vs. temp. (V IN = 1.9 V) Figure 14. Enable pin thresholds vs. temp Figure 15. Quiescent current vs. temp. for adjustable version (I O = ma) Figure 16. Quiescent current vs. temp. for adjustable version (I O = 3 ma) Figure 17. Quiescent current vs. temp. for fixed version (I O = ma) Figure 18. Quiescent current vs. temp. for fixed version (I O = 3 ma) Figure 19. Shutdown current vs. temperature Figure 2. SVR vs. frequency (V O = 2.5 V) Figure 21. SVR vs. frequency (V O = V ADJ ) Figure 22. Output noise vs. frequency (V O = 3.3 V) Figure 23. Output noise vs. frequency (V O =V ADJ ) Figure 24. Stability region vs. COUT (fixed) Figure 25. Stability region vs COUT (adjust.) Figure 26. Line transient (V OUT = V ADJ ) Figure 27. Line transient (V OUT = 3 V) Figure 28. Load transient (V OUT = 3 V) Figure 29. Load transient (V OUT = V ADJ ) Figure 3. Startup transient Figure 31. Enable transient (V OUT = V ADJ ) Figure 32. Enable transient (V OUT = 3 V) Figure 33. Dropout voltage vs. temperature (I OUT = 1 ma) Figure 34. Dropout voltage vs. temperature (I OUT = 3 ma) Figure 35. SOT23-5L mechanical drawing Figure 36. SOT23-5L footprint (dimensions in mm) Figure 37. DFN6L (1.2 x 1.3 mm) drawing Figure 38. DFN6L footprint (dimensions in mm) Figure 39. SOT323-5L drawing Figure 4. TSOT23-5L and SOT323-xL tape and reel drawing /27 DocID2421 Rev 3

5 LDK13 Diagram 1 Diagram Figure 1. Block diagram DocID2421 Rev 3 5/27

6 Pin configuration LDK13 2 Pin configuration Figure 2. Pin connection (top view) SOT23-5L, SOT323-5L DFN6 (1.2 x 1.3) Table 1. Pin description (SOT23-5L, SOT323-5L) Pin SOT23/ SOT323 DFN6 Symbol Function 1 6 IN Input voltage of the LDO 2 2 GND Common ground 3 4 EN Enable pin logic input: Low = shutdown, High = active 4 3 BYP (1) /ADJ 5 1 OUT Output voltage of the LDO Bypass capacitor on fixed versions, Adjustable pin on ADJ versions - 5 N/C Not connected. This pin should be connected to GND 1. Bypass capacitor for noise reduction on fixed version is optional, if not used the relevant pin must be left floating with no routing on the board. 6/27 DocID2421 Rev 3

7 LDK13 Typical application 3 Typical application Figure 3. Typical application circuits for fixed version Figure 4. Typical application circuits for adjustable version V O =V ADJ (1+R 1 /R 2 ) DocID2421 Rev 3 7/27

8 Maximum ratings LDK13 4 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit V IN DC input voltage -.3 to 7 V V OUT DC output voltage -.3 to V I +.3 V V EN Enable input voltage -.3 to V I +.3 V V BYP/ADJ ADJ/Bypass pin voltage 2 V I OUT Output current Internally limited ma P D Power dissipation Internally limited mw T STG Storage temperature range - 65 to 15 C T OP Operating junction temperature range - 4 to 125 C Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. All values are referred to GND. Table 3. Thermal data Symbol Parameter SOT23-5L SOT323-5L DFN-6L Unit R thja Thermal resistance junction-ambient C/W R thjc Thermal resistance junction-case C/W 8/27 DocID2421 Rev 3

9 LDK13 Electrical characteristics 5 Electrical characteristics T J = 25 C, V IN = V OUT(NOM) + 1 V, C IN = C OUT = 1 µf, I OUT = 1 ma, V EN = V IN, unless otherwise specified. Table 4. Electrical characteristics for LDK13 (fixed version) Symbol Parameter Test conditions Min. Typ. Max. Unit V IN Operating input voltage V V OUT V OUT accuracy I OUT =1 ma, T J =25 C % I OUT =1 ma, -4 C<T J <125 C % ΔV OUT Static line regulation V OUT +1 V V IN 5.5 V, I OUT =1 ma.5 %/V ΔV OUT Static load regulation I OUT = 1 ma to 3 ma.6 %/ma I OUT = 1 ma, V OUT =2.5 V 1 V DROP Dropout voltage (1) I OUT = 3 ma, V OUT =2.5 V C<T J <125 C e N SVR Output noise voltage Supply voltage rejection 1 Hz to 1 khz, I OUT =1 ma, V OUT =2.5 V, C BYP =1 nf V IN =V OUTNOM +.5 V+/-V RIPPLE V RIPPLE =.1 V Freq.=12 Hz to 1 khz I OUT =1 ma 51 mv µv RMS /V 55 db I OUT = ma, -4 C<T J <125 C 3 6 I Q Quiescent current I OUT =3 ma, -4 C<T J <125 C 7 12 µa V IN input current in OFF mode: V EN =GND 1 I SC Short-circuit current R L = 45 ma Enable input logic low V IN =1.9 V to 5.5 V, -4 C<T J <125 C.4 V EN Enable input logic high V IN =1.9 V to 5.5 V, -4 C<T J <125 C 1.2 V I EN Enable pin input current V SHDN =V IN 1 na Thermal shutdown 16 T SHDN C Hysteresis 2 C OUT Output capacitor Capacitance (see Section 6: Typical performance characteristics) 1 22 µf 1. Dropout voltage is the input-to-output voltage difference at which the output voltage is 1 mv below its nominal value. DocID2421 Rev 3 9/27

10 Electrical characteristics LDK13 T J = 25 C, V IN = V OUT(NOM) + 1 V, C IN = C OUT = 1 µf, I OUT = 1 ma, V EN = V IN, unless otherwise specified. Table 5. Electrical characteristics for LDK13 (adjustable version) Symbol Parameter Test conditions Min. Typ. Max. Unit V IN Operating input voltage V V ADJ V ADJ accuracy I OUT =1 ma, T J =25 C mv I OUT =1 ma, -4 C<T J <125 C % ΔV OUT Static line regulation V OUT +1 V V IN 5.5 V, I OUT =1 ma.5 %/V ΔV OUT Static load regulation I OUT =1 ma to 3 ma.6 %/ma I OUT =1 ma, V OUT =2.5 V 1 V DROP Dropout voltage (1) I OUT = 3 ma, V OUT =2.5 V C<T J <125 C, e N Output noise voltage 1 Hz to 1 khz, I OUT =1 ma 13 I ADJ Adjust pin current 1 µa SVR Supply voltage rejection V IN =V OUTNOM +.5 V+/-V RIPPLE V RIPPLE =.1 V Freq.=12 Hz to 1 khz I OUT =1 ma mv µv RMS /V 55 db I OUT = ma, -4 C<T J <125 C 3 6 I Q Quiescent current I OUT =3 ma, -4 C<T J <125 C 7 12 µa V IN input current in OFF mode: V EN =GND 1 I SC Short-circuit current R L = 45 ma Enable input logic low V IN =1.9 V to 5.5 V, -4 C<T J <125 C.4 V EN Enable input logic high V IN =1.9 V to 5.5 V, -4 C<T J <125 C 1.2 V I EN Enable pin input current V SHDN =V IN 1 na Thermal shutdown 16 T SHDN C Hysteresis 2 C OUT Output capacitor Capacitance (see Section 6: Typical performance characteristics) 1 22 µf 1. Dropout voltage is the input-to-output voltage difference at which the output voltage is 1 mv below its nominal value. 1/27 DocID2421 Rev 3

11 LDK13 Typical performance characteristics 6 Typical performance characteristics C IN = C OUT = 1 µf, V EN to V IN, unless otherwise specified. Figure 5. Output voltage vs. temp. for adjustable (I O = 1 ma) Figure 6. Output voltage vs. temp. for adjustable version (I O = 3 ma) VADJ [ V ] AM128v V IN = 1.9 V, I OUT = 1 ma Temperature [ C] V ADJ [V] AM16274v1.85 V IN = 1.9 V, I OUT = 3 ma Temperature [ C] Figure 7. Output voltage vs. temp. for fixed version (I O = 1 ma) Figure 8. Output voltage vs. temp. for fixed version (I O = 3 ma) V OUT [V] AM16198v V IN = 4 V, I OUT = 1 ma Temperature [ C] V OUT [V] AM16199v V IN = 4 V, I OUT = 3 ma Temperature [ C] DocID2421 Rev 3 11/27

12 Typical performance characteristics LDK13 Figure 9. Line regulation vs. temp. for adjustable version Figure 1. Short-circuit current vs. temp. for adjustable version Line regulation [%/V].1.9 AM162v1 V IN from 1.9 V to 5.5 V, I OUT = 1 ma Temperature [ C] I SHORT [ma] 6 AM1621v1 V IN = 1.9 V Temperature [ C] Figure 11. Load regulation vs. temp. for adjustable version Figure 12. Load regulation vs. temp. for fixed version Load regulation [%/ma] V IN = 1.9 V, I OUT from 1 ma to 3 ma AM16276v1 Load regulation [%/ma] V IN = 4 V, I OUT from 1 ma to 3 ma AM16277v1 Temperature [ C] Temperature [ C] Figure 13. Enable pin thresholds vs. temp. (V IN = 1.9 V) Figure 14. Enable pin thresholds vs. temp. V EN Thresholds [V] 1 V IN = 1.9 V, I OUT = 1 ma.9.8 AM1624v1 Low High Temperature [ C] V EN Thresholds [V] 1.6 V IN = 5.5 V, I OUT = 1 ma AM1625v1 Low 1.4 High Temperature [ C] 12/27 DocID2421 Rev 3

13 LDK13 Typical performance characteristics Figure 15. Quiescent current vs. temp. for adjustable version (I O = ma) Figure 16. Quiescent current vs. temp. for adjustable version (I O = 3 ma) Quiescent current [µa] 1 9 AM1626v1 V IN = 1.9 V, I OUT = ma Temperature [ C] Quiescent current [µa] 2 18 AM16278v1 V IN = 1.9 V, I OUT = 3 ma Temperature [ C] Figure 17. Quiescent current vs. temp. for fixed version (I O = ma) Figure 18. Quiescent current vs. temp. for fixed version (I O = 3 ma) Quiescent current [µa] 1 9 AM1628v1 V IN = 4 V, I OUT = ma Temperature [ C] Quiescent current [µa] 2 18 AM16279v1 V IN = 4 V, I OUT = 3 ma Temperature [ C] Figure 19. Shutdown current vs. temperature Figure 2. SVR vs. frequency (V O = 2.5 V) Quiescent current [µa] 1.9 AM1621v1 V IN = 4 V, V EN = GND Temperature [ C] SVR [db] AM16211v1 Cbyp =1 nf No Cbyp V OUT = 2.5 V, V IN = V OUT +.5 V +/- 1 mv, I OUT = 1 ma Frequency [Hz] DocID2421 Rev 3 13/27

14 Typical performance characteristics LDK13 Figure 21. SVR vs. frequency (V O = V ADJ ) Figure 22. Output noise vs. frequency (V O =3.3V) SVR [db] AM16212v1 en [µv /Sqrt (Hz)] V IN = 4.3 V, I OUT = 1 ma AM16213v1 Cbyp = 1 nf No Cbyp 1 V OUT = V ADJ, V IN = V OUT +.5 V +/- 1 mv, I OUT = 1 ma Frequency [Hz] Frequency (Hz) Figure 23. Output noise vs. frequency (V O =V ADJ ) Figure 24. Stability region vs. C OUT (fixed) V IN = 1.8 V, I OUT = 1 ma AM16214v AM16215v1 en [µv /Sqrt (Hz)] khz [Ω] Stability area Frequency [Hz] C OUT [µf] (nominal value) V IN = V EN = 4 to 5.5 V, I OUT = 1 ma to.3 A, C IN = 1 µf, T A = 25 C Figure 25. Stability region vs C OUT (adjust.) Figure 26. Line transient (V OUT = V ADJ ) 1 AM16216v khz [Ω] Stability area C OUT [µf] (nominal value) V IN = V EN = 1.9 to 5.5 V, I OUT = 1 ma to.3 A, C IN = 1 µf, T A = 25 C V OUT = V ADJ, V IN = 3.5 V to 4 V, V EN = 2 V, I OUT = 1 ma, NO C IN, C OUT = 1 µf, t r = t f = 5 µs 14/27 DocID2421 Rev 3

15 LDK13 Typical performance characteristics Figure 27. Line transient (V OUT = 3 V) Figure 28. Load transient (V OUT = 3 V) V OUT = 3 V, V IN = 4 V to 4.5 V, V EN = 2 V, I OUT = 1 ma, NO C IN, C OUT = 1 µf, t r = t f = 5 µs Figure 29. Load transient (V OUT = V ADJ ) V OUT = 3 V, V IN = V EN = 3.5 V, I OUT = 1 ma to 2 ma, C OUT = 1 µf, t r = t f = 5 µs Figure 3. Startup transient V OUT = V ADJ, V IN = V EN = 3.5 V, I OUT = 1 ma to 2 ma, C OUT = 1 µf, t r = t f = 5 µs V OUT = 3 V, V IN = V EN = to 4.2 V, I OUT = 1 ma, C IN = C OUT = 1 µf, t r = t f = 5 µs DocID2421 Rev 3 15/27

16 Typical performance characteristics LDK13 Figure 31. Enable transient (V OUT = V ADJ ) Figure 32. Enable transient (V OUT = 3 V) V V, V IN = 1.9, V EN = to V IN, I OUT = 2 ma, C OUT = 1 µf, t r = t f = 1 µs Figure 33. Dropout voltage vs. temperature (I OUT = 1 ma) V IN = 4 V, V EN = to V IN, I OUT = 2 ma, C IN = C OUT = 1 µf, t r = t f = 1 µs Figure 34. Dropout voltage vs. temperature (I OUT = 3 ma) Dropout Voltage [mv] 3 AM16226v1 C IN = C OUT = 1 µf, I OUT = 1 ma, Fixed 3. V version Temperature [ C] Dropout Voltage [mv] 5 45 AM16275v1 C IN = C OUT = 1 µf, I OUT = 3 ma, Fixed 3. V version Temperature [ C] 16/27 DocID2421 Rev 3

17 LDK13 Package mechanical data 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: ECOPACK is an ST trademark. Figure 35. SOT23-5L mechanical drawing DocID2421 Rev 3 17/27

18 Package mechanical data LDK13 Table 6. SOT23-5L mechanical data Dim. mm Min. Typ. Max. A A1.15 A b.3.5 c D 2.95 E 1.6 e.95 H 2.8 L.3.6 θ 8 Figure 36. SOT23-5L footprint (dimensions in mm) 18/27 DocID2421 Rev 3

19 LDK13 Package mechanical data Figure 37. DFN6L (1.2 x 1.3 mm) drawing DocID2421 Rev 3 19/27

20 Package mechanical data LDK13 Table 7. DFN6L (1.2 x 1.3 mm) mechanical data Dim. mm Min. Typ. Max. A A D E e b L L aaa Figure 38. DFN6L footprint (dimensions in mm) 2/27 DocID2421 Rev 3

21 LDK13 Package mechanical data Figure 39. SOT323-5L drawing DocID2421 Rev 3 21/27

22 Package mechanical data LDK13 Table 8. SOT323-5L mechanical data Dim. mm Min. Typ. Max. A A1.1 A b.15.3 c.1.22 D E E e.65 e1 1.3 L < 8 22/27 DocID2421 Rev 3

23 LDK13 Packaging mechanical data 8 Packaging mechanical data Figure 4. TSOT23-5L and SOT323-xL tape and reel drawing DocID2421 Rev 3 23/27

24 Packaging mechanical data LDK13 Table 9. SOT23-5L tape and reel mechanical data Dim. mm Min. Typ. Max. A 18 C D 2.2 N 6 T 14.4 Ao Bo Ko Po P Table 1. SOT323-xL tape and reel mechanical data Dim. mm Min. Typ. Max. A C D 2.2 N T 14.4 Ao 2.25 Bo 3.17 Ko 1.2 Po P /27 DocID2421 Rev 3

25 LDK13 Order codes 9 Order codes Table 11. Order codes Packages SOT323-5L SOT23-5L DFN6L Output voltages LDK13C-R LDK13M-R LDK13PU-R ADJ LDK13C8R LDK13M8R LDK13PU8R.8 V LDK13C1R LDK13M1R LDK13PU1R 1 V LDK13C12R LDK13M12R LDK13PU12R 1.2 V LDK13C15R LDK13M15R LDK13PU15R 1.5 V LDK13C18R LDK13M18R LDK13PU18R 1.8 V LDK13M25R LDK13PU25R 2.5 V LDK13C29R LDK13M29R LDK13PU29R 2.9 V LDK13PU3R 3 V LDK13C32R LDK13M32R LDK13PU32R 3.2 V LDK13C33R LDK13M33R LDK13PU33R 3.3 V Table 12. Marking Order codes Packages Output voltages Marking LDK13MxxR SOT23-5L xx V Kxx LDK13CxxR SOT323-5L xx V Kxx LDK13PUxxR DFN-6L xx V xx LDK13M-R SOT23-5L Adj KAD LDK13C-R SOT323-5L Adj KAD LDK13PU-R DFN-6L Adj AD DocID2421 Rev 3 25/27

26 Revision history LDK13 1 Revision history Table 13. Document revision history Date Revision Changes 31-Jan Initial release 25-Oct RPN LDK13xx changed to LDK13. Updated the Features and the Description in cover page. Cancelled Table1: Device summary. Updated Section 7: Package mechanical data, Table 2: Absolute maximum ratings and Table 11: Order codes. Added Section 8: Packaging mechanical data. Minor text changes. 1-Mar Updated Table 11: Order codes. 26/27 DocID2421 Rev 3

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