Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsL4993DTR

This is information on a product in full production.

September 2013 Doc ID 13517 Rev 8 1/32

L4993

Low drop voltage regulator

Datasheet  production data

Features

■ Operating DC supply voltage range 5.6V to

31V

■ Reset circuit sensing the output voltage down

to 1V

■ Programmable reset pulse delay with external

capacitor

■ Watchdog

■ Programmable watchdog timer with external

capacitor

■ Enable input for enabling/disabling the

watchdog functionality

■ Thermal shutdown and short circuit protection

■ Wide temperature range (T

= -40°C to 150°C)

Description

The L4993 is a monolithic integrated 5V Voltage

regulator with a low drop voltage at currents up to

150 mA.The output voltage regulating element

consists in a p-channel MOS and the regulation is

performed regardless of input voltage transients

up to 40V. The high precision of the output voltage

is obtained with a pre-trimmed reference voltage.

The L4993 is protected against short circuit and

an over-temperature protection switches off the

device in case of extremely high power dissipa-

tion. The L4993 watchdog

is active when the

Enable is high. State of the art features like reset

and watchdog make this device particularly

suitable to supply microprocessor systems in

automotive applications.

Max DC supply voltage V

40V

Max output voltage tolerance V

+/-2%

Max dropout voltage V

400 mV

Output current I

150 mA

Quiescent current I

79 µA

(1)

1. Typical value with watchdog disabled.

'!0'#&4

SO-8

'!0'#&4

SO-20

Table 1. Device summary

Package

Order codes

Tube Tape & reel

SO-8 L4993D L4993DTR

SO-20 (16+2+2) L4993MD L4993MDTR

www.st.com

Summary of content (32 pages)

PAGE 1
L4993 Low drop voltage regulator Datasheet  production data Features Max DC supply voltage VS 40V Max output voltage tolerance V0 +/-2% Max dropout voltage Vdp 400 mV Output current I0 150 mA Quiescent current Iqn 79 µA(1) '!0'#&4 SO-8 '!0'#&4 SO-20 1. Typical value with watchdog disabled. Description ■ Operating DC supply voltage range 5.
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Contents L4993 Contents 1 Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 Electrical characteristics . . . . . . . . . . . . . .
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L4993 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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List of figures L4993 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. Figure 29. Figure 30. Figure 31. Figure 32. Figure 33. Figure 34. Figure 35. Figure 36. Figure 37. Figure 38. Figure 39. Figure 40. Figure 41. 4/32 Block diagram . . . . .
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L4993 1 Block diagram and pins description Block diagram and pins description Figure 1.
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Block diagram and pins description Table 2. Pin L4993 Pins description SO-8 (D) SO-20 (MD) WEn 1 1 Watchdog Enable input If high watchdog functionality is active Gnd 2 4 Ground reference name Gnd 5, 6, 15, 16 Function Ground Connected these pins to a heat spreader ground Res 3 7 Reset output. It is pulled down when output voltage goes below Vo_th or frequency at Wi is too low. Leave floating if not used. Vcr 4 10 Reset timing adjust.
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L4993 Electrical specifications 2 Electrical specifications 2.1 Absolute maximum ratings Stressing the device above the rating listed in Table 3 may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability.
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Electrical specifications 2.3 L4993 Electrical characteristics Values specified in this section are for Vs =5.6V to 31V, Tj= -40°C to +150°C unless otherwise stated. Table 5. General Pin Symbol Parameter Min. Typ. Vo Vo_ref Output voltage Vs = 6 to 31V Io = 1 to 150mA 4.9 5.0 5.1 V Vo Ishort Short circuit current Vs = 13.5V(1) Vo Ilim(2) 150 280 400 mA (1) Output current limitation Vs = 13.
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L4993 Electrical specifications Table 6. Reset Pin Symbol Parameter Test condition Min. Res Vres_l Reset output low voltage Res IRes_h Reset output high leakage VRes = 5V current Res R_p_u Pull up internal resistance With respect to Vo 12 Res Vo_th Vo out of regulation threshold Vs = 6 to 31V, Io = 1 to 150mA Vcr Vrlth Reset delay circuit low threshold Vcr Vrhth Vcr Typ. Max. Rext = 5k to Vo, Vo > 1V Unit 0.4 V 1 µA 25 50 k 6% 8% 10% Below Vo_ref Vs = 13.
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Electrical specifications Table 7. Watchdog (continued) Pin Symbol Vcw Icwd Discharge current Vs = 13.5V, Vcw = 2.5V 1.0 2.13 4.5 µA Vcw Twop Watchdog period Vs = 13.5V, Ctw = 47nF 25 50 90 ms Res twol Watchdog output low time Vs = 13.5V, Ctw = 47nF 6 10.5 22 ms Table 8. 10/32 L4993 Parameter Test condition Min. Typ. Max.
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L4993 Electrical specifications 2.4 Electrical characteristics curves Figure 3. Output voltage vs. Tj Figure 4. Vo_ref (V) Output voltage vs. Vs Vo_ref (V) 10 5,5 Vs= 13.5V I0 = 75mA 5,4 9 5,3 8 5,2 7 5,1 6 5 5 4,9 4 4,8 3 4,7 2 4,6 1 4,5 0 -50 -25 0 25 50 75 100 125 150 I0 = 75 mA Tj = 25 °C 0 5 10 15 Tj(°C ) Figure 5. 20 25 30 35 Vs (V ) Drop Voltage vs. Output Current Vdp (V) Figure 6. Current consumption vs.
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Electrical specifications Figure 9. L4993 Current limitation vs. Input Voltage Figure 10. Short Circuit Current vs. Tj Ilim (mA) Ishort (mA) 350 600 325 500 Tj = 25 °C 300 400 275 Vs= 13.5V 300 Tj = 125 °C 250 200 225 100 200 0 0 5 10 15 20 25 30 35 -50 -25 0 25 Vs (V ) 50 75 100 125 150 125 150 Tj(°C ) Figure 11. Short Circuit Current vs. Input Voltage Figure 12. VWEn_high vs. Tj Vwen_high (V) Ishort (mA ) 4 350 3,5 Vs= 5.
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L4993 Electrical specifications Figure 15. Vrlth vs. Tj Figure 16. Vwhth vs. Tj Vrlth (% Vo_ref) Vwhth (% Vo_ref ) 50 60 55 Vs= 5.6V to 31V 40 Vs= 5.6V to 31V 50 30 45 20 40 10 35 0 30 -50 -25 0 25 50 75 100 125 150 -50 -25 0 25 Tj(°C ) 50 75 100 125 150 Tj(°C ) Figure 17. Vwlth vs. Tj Figure 18. Icr & Icwc vs. Tj Vwlth (% Vo_ref) Icr & Icwc (µA) 50 30 Vs= 5.6V to 31V 25 Vs= 5.
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Electrical specifications L4993 Figure 21. PSRR C0 = 4.7µF PSRR [dB] 80 70 60 50 40 30 20 10 0,1 1 10 100 1000 0 10000 FREQUENCY [KHz] 2.5 Test circuit and waveforms plot 2.5.1 Load regulation Figure 22.
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L4993 Electrical specifications Figure 23.
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Application information 3 L4993 Application information Figure 24. L4993 application schematic 6O 6S 6I # 7KHUPDO SURWHFWLRQ #S 6CW #TW 7I # :DWFKGRJ 9ROWDJH UHIHUHQFH 7%N 2ES 6CR 5HVHW #TR 'ND '!0'2) Note: The input capacitor Cs > 200nF is necessary for the smoothing of line disturbances. The output capacitor C01 > 100nF is necessary for the stability of the regulation loop.
PAGE 17
L4993 Application information Figure 25. Behavior of output current versus regulated voltage Vo 6O 6O?REF )SHORT )LIM )OUT ("1($'5 3.2 Reset The reset circuit supervises the output voltage Vo. The Vo_th reset threshold is defined with the in-ternal reference voltage and a resistor output divider. If the output voltage becomes lower than Vo_th then Res goes low with a reaction time trr. The reset low signal is guaranteed for an output voltage Vo greater than 1V.
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Application information L4993 Figure 26. Reset timing diagram 7I 6O 6 OUT?TH TRR 6 CR 4 OSC TRR 6 RHTH 6 RLTH TRD 4 OSC 2ES '!0'#&4 3.3 Watchdog A connected microcontroller is monitored by the watchdog input Wi. If pulses are missing, the Reset output pin is set to low. The pulse sequence time can be set within a wide range with the external capacitor, Ctw. The watchdog circuit discharges the capacitor Ctw, with the constant current Icwd.
PAGE 19
L4993 Package and PCB thermal data 4 Package and PCB thermal data 4.1 SO-8 thermal data Figure 28. SO-8 PC board *$3*&)7 Layout condition of Rth and Zth measurements (PCB FR4 area= 58mm x 58mm, PCB thickness = 2mm, Cu thickness = 35µm , Copper areas: from minimum pad lay-out to 2cm2). Figure 29. Rthj-amb Vs.
PAGE 20
Package , and PCB thermal data 0ACKAGE AND 0#" THERMALL4993 DATA Figure 30. SO-8 thermal impedance junction ambient single pulse =7+ & : &OOTPRINT CM 7LPH V '!0'2) Equation 1: pulse calculation formula Z TH = R TH +Z THtp 1 –  where  = tP/T Figure 31.
PAGE 21
L4993 Package and PCB thermal data Table 9. SO-8 thermal parameter Area/island (cm2) Footprint R1 (°C/W) 4.21 R2 (°C/W) 2.11 R3 (°C/W) 2 R4 (°C/W) 41 R5 (°C/W) 40 R6 (°C/W) 58 C1 (W.s/°C) 0.00029 C2 (W.s/°C) 0.0024 C3 (W.s/°C) 0.03 C4 (W.s/°C) 0.04 C5 (W.s/°C) 0.1 C6 (W.s/°C) 1.
PAGE 22
Package and PCB thermal data 4.2 L4993 SO-20 thermal data Figure 32. SO-20 PC board . *$3*&)7 Note: Layout condition of Rth and Zth measurements (PCB FR4 area= 58mm x 58mm,PCB thickness = 2mm, Cu thickness=35m , Copper areas: from minimum pad lay-out to 6cm2). Figure 33. Rthj-amb Vs.
PAGE 23
L4993 Package and PCB thermal data Figure 34. SO-20 thermal impedance junction ambient single pulse =7+ & : &X FP &X IRRW SULQW 7LPH V ("1($'5 Equation 2: pulse calculation formula Z TH = R TH +Z THtp 1 –  where  = tP/T Figure 35.
PAGE 24
Package and PCB thermal data Table 10. 24/32 L4993 SO-20 thermal parameter Area/island (cm2) Footprint R1 (°C/W) 4.21 R2 (°C/W) 2.11 R3 (°C/W) 2.2 R4 (°C/W) 10 R5 (°C/W) 15 R6 (°C/W) 35 C1 (W.s/°C) 0.00029 C2 (W.s/°C) 0.0024 C3 (W.s/°C) 0.015 C4 (W.s/°C) 0.15 C5 (W.s/°C) 1.5 C6 (W.
PAGE 25
L4993 Package and packing information 5 Package and packing information 5.1 ECOPACK® 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.SO-8 package information Figure 36. SO-8 package dimensions '!0'#&4 SO-8 mechanical data Table 11. Millimeters Symbol Min.
PAGE 26
Package and packing information L4993 SO-8 mechanical data Table 11. Millimeters Symbol Min. Typ. Max. D(1) 4.80 4.90 5.00 E 5.80 6.00 6.20 E1(2) 3.80 3.90 4.00 e 1.27 h 0.25 0.50 L 0.40 1.27 L1 k 1.04 0° ccc 8° 0.10 1. Dimensions D does not include mold flash, protrusions or gate burrs. Mold flash, potrusions or gate burrs shall not exceed 0.15mm in total (both side). 2. Dimension “E1” does not include interlead flash or protrusions.
PAGE 27
L4993 5.2 Package and packing information SO-20 package information Figure 37. SO-20 package dimensions ("1($'5 SO-20 mechanical data Table 12. Millimeters Symbol Min. Typ. Max. A 2.35 2.65 A1 0.10 0.30 B 0.33 0.51 C 0.23 0.32 D(1) 12.60 13.00 E 7.40 7.60 e 1.27 H 10.0 10.65 h 0.25 0.75 L 0.40 1.
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Package and packing information L4993 SO-20 mechanical data (continued) Table 12. Millimeters Symbol Min. k Typ. Max. 0° 8° ddd 0.10 1. “D” dimension does not include mold flash, protusions or gate burrs. Mold flash, protusions or gate burrs shall not exceed 0.15mm per side. 5.3 SO-8 packing information Figure 38. SO-8 tube shipment (no suffix) " # ! Base q.ty Bulk q.ty Tube length (± 0.5) A B C (± 0.1) All dimensions are in mm. '!0'2) 28/32 Doc ID 13517 Rev 8 100 2000 532 3.2 6 0.
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L4993 Package and packing information Figure 39. SO-8 tape and reel shipment (suffix “TR”) 5.4 SO-20 packing information Figure 40. SO-20 tube shipment (no suffix) # " Base Q.ty Bulk Q.ty Tube length (± 0.5) A B C (± 0.1) 40 800 532 3.5 13.8 0.
PAGE 30
Package and packing information L4993 Figure 41. SO-20 tape and reel shipment (suffix “TR”) Reel dimensions Base Q.ty Bulk Q.ty A (max) B (min) C (± 0.2) D G (+ 2 / -0) N (min) T (max) 1000 1000 330 1.5 13 20.2 24.4 60 30.4 Tape dimensions According to Electronic Industries Association (EIA) Standard 481 rev. A, Feb. 1986 Tape width Tape Hole Spacing Component Spacing Hole Diameter Hole Diameter Hole Position Compartment Depth Hole Spacing W P0 (± 0.1) P D (+ 0.1/-0) D1 (min) F (± 0.
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L4993 6 Revision history Revision history Table 13. Document revision history Date Revision Changes June-2004 1 Initial release. 18-Jan-2007 2 Updated Table 5., 6, 7 and 8. 01-Jun-2007 3 Document put in corporate technical literature template. Updated Table 4. 22-Aug-2007 4 Table 5: General: updated Ishort, Ilim, Iq, Trr2, Vih_hist parameters. 29-Aug-2007 5 Added list of tables and figures. Added Section 4: Package and PCB thermal data. 08-Apr-2008 6 Document restructured.
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L4993 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.