LDL212. High PSRR, low drop linear regulator IC. Datasheet. Features. Applications. Description

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1 Datasheet High PSRR, low drop linear regulator IC Features Input voltage from 2.5 V to 18 V 2 V AMR Any fixed output voltages, from 1.2 V to 12 V in 1 mv steps (from 1.2 V to 6.6 V in 5 mv steps) available on request Adjustable version from 1.18 V to V IN - V DROP(MAX) Guaranteed output current 1.2 A Typical dropout A Undervoltage lockout Enable function Internal thermal, current and power limitation High PSRR: Hz, 75 1 khz Operating temperature range: -4 C to 125 C Packages SO-8 batwing plastic micropackage, DFN6 (3x3) and DFN6 (2x2) Applications Maturity status link LDL212 Consumer Industrial SMPS Point-of-load DC-DC post-regulation Description The LDL212 provides 1.2 A of maximum current from an input voltage range from 2.5 V to 18 V, with a typical dropout voltage of A. The high power supply rejection ratio of 87 db at 12 Hz, and more than 4 db at 1 khz, makes the LDL212 suitable for direct regulation in SMPS and secondary linear regulation in DC-DC converters. The LDL212 goes to shutdown mode due to the enable logic control function, reducing the total current consumption. The device also includes the current limit, SOA and thermal protections. DS Rev 3 - September 218 For further information contact your local STMicroelectronics sales office.

2 Block diagram 1 Block diagram Figure 1. Block diagram (fixed) V IN V OUT UVLO Bias generator RC filter OP-AMP SENSE EN Enable Bandgap reference Thermal protection Current and power limit GND GIPD MT Figure 2. Block diagram (adjustable) V IN V OUT UVLO Bias generator RC filter OP-AMP EN Enable ADJ Bandgap reference Thermal protection Current and power limit GND GIPD bMT DS Rev 3 page 2/28

3 Pin configuration 2 Pin configuration Figure 3. Pin configuration (top view) SO-8 DFN6 GIPD MT Table 1. Pin description Pin name Pin number (SO-8) Pin number (DFN6) Description V IN 4 4 Input voltage V OUT 1 3 Output voltage GND 2, 3, 6, 7 1 Output voltage ADJ/sense 8 2 Feedback pin for adjustable version / V OUT sense on fixed version EN 5 6 Enable pin. The device is in off-state when this pin is pulled low NC - 5 Not connected GND - exposed pad Exposed pad must be connected to GND 1. The sense pin on the fixed version must be connected to V OUT for proper operation. DS Rev 3 page 3/28

4 Typical application 3 Typical application Figure 4. Typical application circuit (adjustable version) V IN V I V O V OUT LDL212 R 1 C In ON OFF EN ADJ GND C Out 1µF 4.7µF R 2 Adjustable version GIPD MT Figure 5. Typical application circuit (fixed version) V IN V I V O V OUT C In ON OFF LDL212 EN SENSE GND C Out 1µF 4.7µF Fixed version GIPD MT Note: R1 and R2 are calculated according to the following formula: R 1 = R 2 x (V OUT /V ADJ - 1). The output voltage of the adjustable version can be set from 1.18 V to V IN -V DROP(MAX), where V DROP(MAX) is the maximum dropout voltage, as defined in Table 4. Electrical characteristics. DS Rev 3 page 4/28

5 Maximum ratings 4 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit V IN DC input voltage -.3 to 2 V V OUT DC output voltage -.3 to V IN +.3 V V EN Enable input voltage -.3 to V IN +.3 V V SENSE Output sense pin voltage -.3 to V IN +.3 V V ADJ ADJ pin voltage -.3 to 2 V I OUT Output current Internally limited ma P D Power dissipation Internally limited mw T STG Storage temperature range - 55 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. Table 3. Thermal data Symbol Parameter Value Unit SO-8 batwing plastic micropackage DFN6 (2x2) DFN6 (3x3) Thermal resistance junction-to-case 2 Thermal resistance junction-to-ambient 55 Thermal resistance junction-to-case 15 Thermal resistance junction-to-ambient 65 Thermal resistance junction-to-case 1 Thermal resistance junction-to-ambient 55 C/W DS Rev 3 page 5/28

6 Electrical characteristics 5 Electrical characteristics T J = 25 C, V IN = V OUT(NOM) + 1 V, C IN = 1 μf, C OUT = 4.7 μf, I OUT = 1 ma, V EN = V IN, unless otherwise specified. ( For V OUT(NOM) 1.5 V, V IN = 2.7 V.) Table 4. Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit V IN Operating input voltage V V Turn-on threshold V UVLO Hysteresis 2 mv V OUT V OUT accuracy I OUT = 1 ma T J = 25 C I OUT = 1 ma -4 C < T J < 125 C -2 2 % -3 3 % V IN = 2.5 V, I OUT = 1 ma 1.18 V V ADJ Adjustable pin voltage T J = 25 C V IN = 2.5 V, I OUT = 1 ma -4 C < T J < 125 C % % I ADJ Adjustable pin current V IN = 2.5 V, I OUT = 1 ma 2 na ΔV OUT Line regulation V OUT + 1 V V IN 18 V, I OUT = 1 ma.2.1 %/V ΔV OUT Load regulation I OUT = 1 ma to 1.2 A.1.5 %/ma V DROP Dropout voltage (1) I OUT = 1.2 A V OUT > 3 V -4 C < T J < 125 C 35 6 mv en Output noise voltage 1 Hz to 1 khz, I OUT = 1 ma 6 µv RMS / V OUT V IN = V OUT(NOM) + 1 V ± V RIPPLE 87 V RIPPLE =.5 V, f = 12 Hz SVR Supply voltage rejection V IN = V OUT(NOM) + 1 V ± V RIPPLE 75 V RIPPLE =.5 V, f = 1 khz db V IN = V OUT(NOM) + 1 V ± V RIPPLE 5 V RIPPLE =.5 V, f = 1 khz I Q Quiescent current I OUT = ma to 1.2 A -4 C < T J < 125 C V IN input current in OFF mode V EN = GND V IN = 18 V µa I SC Short-circuit current R L = A DS Rev 3 page 6/28

7 Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit V EN Enable input logic low Enable input logic high V IN = 2.5 V to 18 V -4 C < T J < 85 C V IN = 2.5 V to 18 V -4 C < T J < 85 C V I EN Enable input current V EN = V IN, V IN = 18 V µa T ON Turn-on time (2) 12 µs T Thermal shutdown 175 SHDN Hysteresis 25 C 1. Dropout voltage is the input-to-output voltage difference at which the output voltage is 1 mv below its nominal value. This specification is not valid for output voltages below 2.2 V. 2. Turn-on time is the time measured between the enable input just exceeding V EN high value and the output voltage just reaching 95% of its nominal value. DS Rev 3 page 7/28

8 Typical performance characteristics 6 Typical performance characteristics Figure 6. Output voltage vs. temperature (V IN = 2.5 V, V OUT = V ADJ, I OUT = ma) Figure 7. Output voltage vs. temperature (V IN = 2.5 V, V OUT = V ADJ, I OUT = 12 ma) Output voltage [V] Output voltage [V] GIPD MT 1.14 GIPD MT Figure 8. Output voltage vs. temperature (V IN = 6 V, V OUT = 5 V, I OUT = 1 ma) Figure 9. Output voltage vs. temperature (V IN = 6 V, V OUT = 5 V, I OUT = 12 ma) Output voltage [V] Output voltage [V] GIPD MT 4.7 GIPD MT DS Rev 3 page 8/28

9 Typical performance characteristics Figure 1. Line regulation vs. temperature (V IN = 6 to 18 V, V OUT = 5 V, I OUT = 1 ma ) Figure 11. Line regulation vs. temperature (V IN = 2.5 to 18 V, V OUT = V ADJ, I OUT = 1 ma).4.3 Line regulation [%/V].2 Line regulation [%/V] GIPD MT GIPD MT Figure 12. Load regulation vs. temperature (V IN = 6 V, V OUT = 5 V, I OUT = 1 to 12 ma ) Figure 13. Load regulation vs. temperature (V IN = 2.5 V, V OUT = V ADJ, I OUT = to 12 ma).1.1 Line regulation [%/ma] Line regulation [%/ma] GIPD MT GIPD MT Figure 14. Enable thresholds vs. temperature (V OUT = V ADJ ) Figure 15. Enable thresholds vs. temperature(v OUT = 5 V) Ven-Lo, Vin=6V Ven-Hi, Vin=6V V EN [V] V EN [V] GIPD MT GIPD bMT DS Rev 3 page 9/28

10 Typical performance characteristics Figure 16. Dropout voltage vs. temperature Figure 17. Quiescent current vs. temperature (V OUT = 5 V, I OUT = ma) 6 IOUT =6mA IOUT =12mA IOUT =1mA 6 V DROP [mv] 4 2 IQ [µa] 4 2 GIPD MT V OUT = 5 V GIPD bMT Figure 18. Quiescent current vs. temperature (V OUT = 5 V, I OUT = 6 ma, 1.2 A) Figure 19. Quiescent current vs. temperature (V OUT = V ADJ, I OUT = ma) 6 4 IOUT = 6 ma I OUT = 12 ma 6 4 VIN =2.5V VIN =12V VIN =18V IQ [µa] IQ [µa] 2 2 V OUT = 5 V GIPD MT V OUT = V ADJ GIPD MT Figure 2. Quiescent current vs. temperature (V OUT = V ADJ, I OUT = 6 ma) Figure 21. Quiescent current vs. temperature (V OUT = V ADJ, I OUT = 1.2 A) IQ [µa] VIN =2.5V VIN =6V VIN =1V IQ [µa] V OUT = V ADJ GIPD MT V OUT = V ADJ GIPD MT DS Rev 3 page 1/28

11 Typical performance characteristics Figure 22. Off-state current vs. temperature (V OUT = 5 V) Figure 23. Off-state current vs. temperature (V OUT = V ADJ ) VIN = 2.5 V VIN = 18 V IQ [µa] 3 2 IQ [µa] GIPD MT V OUT = V ADJ GIPD MT Figure 24. Short-circuit current vs. dropout voltage (V OUT = 5 V) Figure 25. Short-circuit current vs. dropout voltage (V OUT = V ADJ ) I SHORT [A] ISHORT [A] T=125 C ISHORT [A] T=85 C ISHORT [A] T=25 C ISHORT [A] T= C ISHORT [A] T=-25 C ISHORT [A] T=-4 C I SHORT [A] ISHORT [A] T=125 C ISHORT [A] T=85 C ISHORT [A] T=25 C ISHORT [A] T= C ISHORT [A] T=-25 C ISHORT [A] T=-4 C V DROP [ V] V EN to V IN, C IN =1µF, C OUT =4.7 µf GIPD MT V DROP [ V] V EN to V IN, C IN =1µF, C OUT =4.7 µf GIPD MT Figure 26. SVR vs. frequency Figure 27. Output noise spectral density (V O = V ADJ ) Vout=5V Vout=Vadj SVR [db] en [uv/sqrt(hz)] frequency [Hz] For V OUT = 5V, V IN = V EN = from 5.5 to 6.5V, I OUT = 1mA, C IN = 1µF, C OUT = 4.7µF For V OUT = V ADJ, V IN = V EN = from 2.5 to 3.5V, I OUT = 1mA, No C IN, C OUT = 4.7µF GIPD MT frequency [Hz] V IN = V EN = 2.5V, V OUT = V ADJ, I OUT = 1mA, C IN = 1µF, C OUT = 4.7µF GIPD MT DS Rev 3 page 11/28

12 Typical performance characteristics Figure 28. Output noise spectral density (V O = 5 V) Figure 29. Output noise spectral density (V O = 12 V) en [uv/sqrt(hz)] 1. en [uv/sqrt(hz)] frequency [Hz] V IN = V EN = 6V, V OUT = 5V, I OUT = 1mA, C IN = 1µF, C OUT = 4.7 µf GIPD MT frequency [Hz] V IN = V EN = 6V, V OUT = 5V, I OUT = 1mA, C IN = 1µF, C OUT = 4.7 µf GIPD MT Figure 3. Stability plan (V OUT = 5 V) Figure 31. Stability plan (V OUT = V ADJ ) ESR@1KHz [Ω] 1.1 ESR@1KHz [Ω] C OUT [µf] (nominal value) V EN = V IN = from 6 V to 18 V, I OUT = from 1 ma to 1.2 A (according to Max I OUT vs V drop characteristics), C IN = 1 µf GIPD MT C OUT [µf] (nominal value) V EN = V IN = from 2.5 V to 18 V, I OUT = from 1 ma to 1.2 A (according to Max I OUT vs Vdrop characteristics), C IN = 1 µf GIPD MT Figure 32. Startup with enable (V OUT = 5 V) Figure 33. Startup with enable (V OUT = V ADJ ) Ch2=V OUT Ch2=V OUT Ch1=V EN Ch1=V EN VIN = 15 V, VEN from to 2 V, IOUT = 1 ma CIN = COUT = 1 µf Trise = 1 µs GIPD MT VIN = 15 V, VEN from to 2 V, IOUT = 1 ma CIN = COUT = 1 µf Trise = 1 µs GIPD MT DS Rev 3 page 12/28

13 Typical performance characteristics Figure 34. Turn-on time (V OUT = 5 V) Figure 35. Turn-on time (V OUT = V ADJ ) Ch2=V OUT VEN = VIN = from to 15 V, IOUT = 1 ma, COUT = 1 µf Trise = 1 µs GIPD MT Figure 36. Line transient (V OUT = 5 V) Figure 37. Line transient (V OUT = V ADJ ) Ch2=V OUT Ch2=V OUT Ch2=V OUT OUT Ch2=V OUT Ch1=V IN Ch1=V IN Ch1=V Ch1=V IN IN Ch1=V IN V IN = from 6 to 15 V, I OUT = 1 ma, C OUT = 4.7 μf, tr = 5 μs GIPD MT V IN = from 3.5 to 15 V, I OUT = 1 ma, NO C IN, C OUT = 4.7 μf, tr = 5 μs GIPD MT Figure 38. Load transient (V OUT = 5 V) Figure 39. Load transient (V OUT = V ADJ ) Ch2=ACV OUT Ch4=I OUT VEN to VCC VIN = 3.5 V, IOUT = from 1 ma to 1.2 A, CIN = 1 µf COUT = 4.7 µf Trise = 5 µs GIPD MT DS Rev 3 page 13/28

14 Package information 7 Package information 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. 7.1 DFN6 (3x3) package information Figure 4. DFN6 (3x3) package outline _C DS Rev 3 page 14/28

15 DFN6 (3x3) package information Table 5. DFN6 (3x3) mechanical data Dim. mm Min. Typ. Max. A.8 1 A1.2.5 A3.2 b D D E E e.95 L Figure 41. DFN6 (3x3) recommended footprint _C DS Rev 3 page 15/28

16 DFN6 (3x3) packing information 7.2 DFN6 (3x3) packing information Figure 42. DFN6 (3x3) tape outline _ N DS Rev 3 page 16/28

17 DFN6 (3x3) packing information Figure 43. DFN6 (3x3) reel outline _ N Table 6. DFN6 (3x3) tape and reel mechanical data Dim. mm Min. Typ. Max. A B K DS Rev 3 page 17/28

18 DFN6 (2x2) package information 7.3 DFN6 (2x2) package information Figure 44. DFN6 (2x2) package outline Table 7. DFN6 (2x2) mechanical data Dim. mm Min. Typ. Max. A A A ref - b DS Rev 3 page 18/28

19 DFN6 (2x2) package information Dim. mm Min. Typ. Max. D E e D E K L aaa bbb ccc ddd eee Figure 45. DFN6 (2x2) recommended footprint reve DS Rev 3 page 19/28

20 DFN6 (2x2) packing information 7.4 DFN6 (2x2) packing information Figure 46. DFN6 (2 x 2 mm) reel outline Table 8. DFN6 (2 x 2 mm) tape and reel mechanical data Dim. mm Min. Typ. Max. A 18 C D 2.2 N 6 T 14.4 A 2.4 B 2.4 K 1.3 P 4 P 4 DS Rev 3 page 2/28

21 SO8 package information 7.5 SO8 package information Figure 47. SO-8 batwing package outline 1623_G Table 9. SO-8 batwing mechanical data Dim. mm Min. Typ. Max. A 1.75 A A b b c.1.25 c D E E e 1.27 h.25.5 L L1 1.4 L2.25 k 8 ccc.1 DS Rev 3 page 21/28

22 SO8 package information Figure 48. SO-8 batwing recommended footprint 1623_GU DS Rev 3 page 22/28

23 Ordering information 8 Ordering information Table 1. Order code DFN6 (3x3) DFN6 (2x2) SO-8 batwing plastic micropackage Output voltage (V) LDL212PU12R (1) 1.2 LDL212PU15R 1.5 LDL212PU18R (1) 1.8 LDL212PU25R (1) 2.5 LDL212PU3R (1) 3 LDL212PV33R LDL212D33R (1) 3.3 LDL212PU5R 5 LDL212PUR LDL212PVR LDL212DR Adjustable 1. Available on request. DS Rev 3 page 23/28

24 Revision history Table 11. Document revision history Date Revision Changes 2-Mar Initial release. 19-Sep Sep Updated Table 3: "Thermal data" and Section 5: "Electrical characteristics". Minor text changes. Added: GND pin name in Table 1. Pin description and new order code LDL212D33R in Table 1. Order code. DS Rev 3 page 24/28

25 Contents Contents 1 Block diagram Pin configuration Typical application Maximum ratings Electrical characteristics Typical performance characteristics Package information DFN6 (3x3) package information DFN6 (3x3) packing information DFN6 (2x2) package information DFN6 (2x2) packing information SO8-batwing package information SO8-batwing packing information... 8 Ordering information...23 Revision history...24 Contents...25 List of tables...26 List of figures...27 DS Rev 3 page 25/28

26 List of tables List of tables Table 1. Pin description....3 Table 2. Absolute maximum ratings...5 Table 3. Thermal data....5 Table 4. Electrical characteristics...6 Table 5. DFN6 (3x3) mechanical data Table 6. DFN6 (3x3) tape and reel mechanical data Table 7. DFN6 (2x2) mechanical data Table 8. DFN6 (2 x 2 mm) tape and reel mechanical data... 2 Table 9. SO-8 batwing mechanical data Table 1. Order code Table 11. Document revision history DS Rev 3 page 26/28

27 List of figures List of figures Figure 1. Block diagram (fixed)....2 Figure 2. Block diagram (adjustable)... 2 Figure 3. Pin configuration (top view)...3 Figure 4. Typical application circuit (adjustable version) Figure 5. Typical application circuit (fixed version)....4 Figure 6. Output voltage vs. temperature (V IN = 2.5 V, V OUT = V ADJ, I OUT = ma)...8 Figure 7. Output voltage vs. temperature (V IN = 2.5 V, V OUT = V ADJ, I OUT = 12 ma)...8 Figure 8. Output voltage vs. temperature (V IN = 6 V, V OUT = 5 V, I OUT = 1 ma)...8 Figure 9. Output voltage vs. temperature (V IN = 6 V, V OUT = 5 V, I OUT = 12 ma)...8 Figure 1. Line regulation vs. temperature (V IN = 6 to 18 V, V OUT = 5 V, I OUT = 1 ma )...9 Figure 11. Line regulation vs. temperature (V IN = 2.5 to 18 V, V OUT = V ADJ, I OUT = 1 ma)...9 Figure 12. Load regulation vs. temperature (V IN = 6 V, V OUT = 5 V, I OUT = 1 to 12 ma )...9 Figure 13. Load regulation vs. temperature (V IN = 2.5 V, V OUT = V ADJ, I OUT = to 12 ma)...9 Figure 14. Enable thresholds vs. temperature (V OUT = V ADJ )...9 Figure 15. Enable thresholds vs. temperature(v OUT = 5 V)...9 Figure 16. Dropout voltage vs. temperature... 1 Figure 17. Quiescent current vs. temperature (V OUT = 5 V, I OUT = ma) Figure 18. Quiescent current vs. temperature (V OUT = 5 V, I OUT = 6 ma, 1.2 A)... 1 Figure 19. Quiescent current vs. temperature (V OUT = V ADJ, I OUT = ma)... 1 Figure 2. Quiescent current vs. temperature (V OUT = V ADJ, I OUT = 6 ma)... 1 Figure 21. Quiescent current vs. temperature (V OUT = V ADJ, I OUT = 1.2 A)... 1 Figure 22. Off-state current vs. temperature (V OUT = 5 V) Figure 23. Off-state current vs. temperature (V OUT = V ADJ ) Figure 24. Short-circuit current vs. dropout voltage (V OUT = 5 V) Figure 25. Short-circuit current vs. dropout voltage (V OUT = V ADJ ) Figure 26. SVR vs. frequency Figure 27. Output noise spectral density (V O = V ADJ ) Figure 28. Output noise spectral density (V O = 5 V) Figure 29. Output noise spectral density (V O = 12 V) Figure 3. Stability plan (V OUT = 5 V) Figure 31. Stability plan (V OUT = V ADJ ) Figure 32. Startup with enable (V OUT = 5 V) Figure 33. Startup with enable (V OUT = V ADJ ) Figure 34. Turn-on time (V OUT = 5 V) Figure 35. Turn-on time (V OUT = V ADJ ) Figure 36. Line transient (V OUT = 5 V) Figure 37. Line transient (V OUT = V ADJ ) Figure 38. Load transient (V OUT = 5 V) Figure 39. Load transient (V OUT = V ADJ ) Figure 4. DFN6 (3x3) package outline Figure 41. DFN6 (3x3) recommended footprint Figure 42. DFN6 (3x3) tape outline Figure 43. DFN6 (3x3) reel outline Figure 44. DFN6 (2x2) package outline Figure 45. DFN6 (2x2) recommended footprint Figure 46. DFN6 (2 x 2 mm) reel outline... 2 Figure 47. SO-8 batwing package outline Figure 48. SO-8 batwing recommended footprint DS Rev 3 page 27/28

28 IMPORTANT NOTICE PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ( ST ) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. 218 STMicroelectronics All rights reserved DS Rev 3 page 28/28

LD A high PSRR ultra low drop linear regulator with reverse current protection. Datasheet. Features. Applications.

LD A high PSRR ultra low drop linear regulator with reverse current protection. Datasheet. Features. Applications. Datasheet 2 A high PSRR ultra low drop linear regulator with reverse current protection Features Input voltage from 1.25 V to 6. V Ultra low drop: 13 mv (typ.) at 2 A load 1 % output accuracy at 25 C,