Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsLD1117AS18TR

This is information on a product in full production.

July 2013 DocID7194 Rev 26 1/24

LD1117A

Low drop fixed and adjustable positive voltage regulators

Datasheet

production data

Features

• Low dropout voltage:

– 1.15 V typ. @ I

OUT

= 1 A, 25 °C

• Very low quiescent current:

– 5 mA typ. @ 25 °C

• Output current up to 1 A

• Fixed output voltage of:

– 1.2 V, 1.8 V, 3.3 V

• Adjustable version availability (V

REF

= 1.25 V)

• Internal current and thermal limit

• Only 10 µF for stability

• Available in ± 2% (at 25 °C) and 4% in full

temperature range

• High supply voltage rejection:

– 80 dB typ. (at 25 °C)

• Temperature range: 0 °C to 125 °C

Description

The LD1117A is a low drop voltage regulator able

to provide up to 1 A of output current, available

also in adjustable versions (V

REF

= 1.25 V). In

fixed versions, the following output voltages are

offered: 1.2 V, 1.8 V, and 3.3 V. The device is

supplied in: SOT-223, DPAK and TO-220. Surface

mounted packages optimize the thermal

characteristics while offering a relevant space

saving advantage. High efficiency is assured by

an NPN pass transistor. Only a very common 10

µF minimum capacitor is needed for stability. Chip

trimming allows the regulator to reach a very tight

output voltage tolerance, within ± 2% at 25 °C.

TO-220

SOT-223

DPAK

Table 1. Device summary

Order codes

Output voltage

SOT-223 DPAK TO-220

LD1117AS12TR LD1117ADT12TR 1.2 V

LD1117AS18TR LD1117ADT18TR 1.8 V

LD1117AS33TR LD1117ADT33TR LD1117AV33 3.3 V

LD1117ASTR LD1117ADT-TR Adjustable from 1.25 V

www.st.com

Summary of content (24 pages)

PAGE 1
LD1117A Low drop fixed and adjustable positive voltage regulators Datasheet - production data • Available in ± 2% (at 25 °C) and 4% in full temperature range • High supply voltage rejection: – 80 dB typ. (at 25 °C) • Temperature range: 0 °C to 125 °C SOT-223 TO-220 Description The LD1117A is a low drop voltage regulator able to provide up to 1 A of output current, available also in adjustable versions (VREF = 1.25 V). In fixed versions, the following output voltages are offered: 1.2 V, 1.8 V, and 3.3 V.
PAGE 2
Contents LD1117A Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . . . . .
PAGE 3
LD1117A 1 Diagram Diagram Figure 1.
PAGE 4
Pin configuration 2 LD1117A Pin configuration Figure 2. Pin connections (top view) 1 2 ADJ/GND VOUT 3 VIN 4/24 3 OUTPUT 2 ADJ/GND 1 TO-220 DPAK SOT-223 Note: INPUT The TAB is connected to the VOUT.
PAGE 5
LD1117A 3 Maximum ratings Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit VIN DC input voltage 15 V PD Power dissipation 12 W -40 to +150 °C 0 to +125 °C TSTG Storage temperature range TOP Operating junction temperature range Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Beyond the above suggested max.
PAGE 6
Schematic application 4 LD1117A Schematic application Figure 3.
PAGE 7
LD1117A 5 Electrical characteristics Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, CI = 10 µF, R = 120 Ω between OUTGND, unless otherwise specified. Table 4. Electrical characteristics of LD1117A#12 Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage VI = 5.3 V, IO = 10 mA, TJ = 25 °C 1.176 1.2 1.224 V VO Output voltage IO = 0 to 1 A, VI = 2.75 to 10 V 1.152 1.2 1.248 V ΔVO Line regulation VI = 2.
PAGE 8
Electrical characteristics LD1117A Table 5. Electrical characteristics of LD1117A#18 (continued) Symbol eN SVR VD Parameter Test conditions Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C Supply voltage rejection IO = 40 mA, f = 120 Hz VI - VO = 3 V, Vripple = 1 VPP Dropout voltage ΔVO(pwr) Thermal regulation Min. 60 Typ. Max. Unit 100 µV 80 dB IO = 100 mA 1 1.10 IO = 500 mA 1.05 1.15 IO = 1 A 1.15 1.30 Ta = 25 °C, 30 ms pulse 0.08 0.
PAGE 9
LD1117A Electrical characteristics Table 7. Electrical characteristics of LD1117A (adjustable) (continued) Symbol Parameter Test conditions ΔVO Load regulation ΔVO Temperature stability ΔVO Long term stability 1000 hrs, TJ = 125 °C VI Operating input voltage IO = 100 mA Iadj Adjustment pin current Vin ≤ 10 V ΔIadj Adjustment pin current change IO(min) Min. VI = 2.75 V, IO = 0 to 1 A Typ. Max. Unit 1 10 mV 0.5 % 0.3 % 10 V 60 120 µA Vin - VO = 1.
PAGE 10
Typical application 6 LD1117A Typical application Figure 4. Negative supply LD1117A VOUT = - VOUT(NOM) Figure 5. Circuit for increasing output voltage LD1117A VOUT = VOUT(NOM) + (0 - 5V) Figure 6.
PAGE 11
LD1117A Typical application Figure 7. Post-regulated dual supply VOUT1 LD1117A VOUT2 = VOUT(NOM) 0.5 A LD1117A VOUT3 = 0.
PAGE 12
LD1117A adjustable: application note 7 LD1117A LD1117A adjustable: application note The LD1117A adjustable has a thermal stabilized 1.25 ± 0.012 V reference voltage between the OUT and ADJ pins. IADJ is 60 µA typ. (120 µA max.) and ΔIADJ is 1 µA typ. (5 µA max.). R1 is normally fixed to 120 Ω. From Figure 6 the following is obtained: VOUT = VREF + R2 (IADJ + IR1) = VREF + R2 (IADJ +VREF /R1) = VREF (1 + R2 / R1) + R2 x IADJ.
PAGE 13
LD1117A 8 Package mechanical data 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. Table 8. TO-220 SG (single gauge) mechanical data mm Dim. Min. Typ. Max. A 4.40 4.60 b 0.61 0.88 b1 1.14 1.70 c 0.48 0.70 D 15.25 15.75 E 10 10.
PAGE 14
Package mechanical data LD1117A Figure 10.
PAGE 15
LD1117A Package mechanical data Table 9. SOT-223 mechanical data mm Dim. Min. Typ. A Max. 1.80 A1 0.02 0.1 B 0.60 0.70 0.85 B1 2.90 3.00 3.15 c 0.24 0.26 0.35 D 6.30 6.50 6.70 e 2.30 e1 4.60 E 3.30 3.50 3.70 H 6.70 7.00 7.30 V 10° Figure 11.
PAGE 16
Package mechanical data LD1117A Table 10. DPAK (TO-252) mechanical data mm Dim. Min. Typ. A 2.20 2.40 A1 0.90 1.10 A2 0.03 0.23 b 0.64 0.90 b4 5.20 5.40 c 0.45 0.60 c2 0.48 0.60 D 6.00 6.20 D1 E 5.10 6.40 6.60 E1 4.70 e 2.28 e1 4.40 4.60 H 9.35 10.10 L 1.00 1.50 (L1) 2.80 L2 0.80 L4 0.60 1.00 R V2 16/24 Max. 0.
PAGE 17
LD1117A Package mechanical data Figure 12.
PAGE 18
Package mechanical data LD1117A Figure 13. DPAK footprint (a) Footprint_REV_K a.
PAGE 19
LD1117A 9 Packaging mechanical data Packaging mechanical data Table 11. SOT-223 tape and reel mechanical data Tape Reel mm mm Dim. Dim. Min. Typ. Max. Min. Max. A0 6.75 6.85 6.95 A B0 7.30 7.40 7.50 N K0 1.80 1.90 2.00 W1 12.4 F 5.40 5.50 5.60 W2 18.4 E 1.65 1.75 1.85 W3 W 11.7 12 12.3 P2 1.90 2 2.10 Base quantity pcs 1000 P0 3.90 4 4.10 Bulk quantity pcs 1000 P1 7.90 8 8.10 T 0.25 0.30 0.35 Df 1.50 1.55 1.60 D1f 1.50 1.60 1.
PAGE 20
Packaging mechanical data LD1117A Figure 15.
PAGE 21
LD1117A Packaging mechanical data Table 12. DPAK tape and reel mechanical data Tape Reel mm mm Dim. Dim. Min. Max. A0 6.8 7 A B0 10.4 10.6 B 1.5 12.1 C 12.8 1.6 D 20.2 G 16.4 50 B1 Min. Max. 330 13.2 D 1.5 D1 1.5 E 1.65 1.85 N F 7.4 7.6 T K0 2.55 2.75 P0 3.9 4.1 Base qty. 2500 P1 7.9 8.1 Bulk qty. 2500 P2 1.9 2.1 R 40 T 0.25 0.35 W 15.7 16.3 DocID7194 Rev 26 18.4 22.
PAGE 22
Packaging mechanical data LD1117A Figure 16. Tape for DPAK 10 pitches cumulative tolerance on tape +/- 0.2 mm T P0 Top cover tape P2 D E F B1 W K0 B0 For machine ref. only including draft and radii concentric around B0 A0 P1 D1 User direction of feed R Bending radius User direction of feed AM08852v1 Figure 17. Reel for DPAK T REEL DIMENSIONS 40mm min. Access hole At sl ot location B D C N A Full radius Tape slot in core for tape start 25 mm min.
PAGE 23
LD1117A 10 Revision history Revision history Table 13. Document revision history Date Revision 29-Sep-2004 11 Add new part number. 12-Oct-2004 12 Mistake VO max. - Table 4. 21-Apr-2005 13 Add new package - D²PAK/A. 05-Jul-2005 14 The DPAK mechanical data updated. 10-Feb-2006 15 Add new package - D²PAK/A (B type). 20-Dec-2006 16 Change value VIN on Table 2. 19-Jan-2007 17 D²PAK/A mechanical data updated and add footprint data. 28-May-2007 18 Add IADJ and ΔIADJ values on Table 7.
PAGE 24
LD1117A 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.