Low drop fixed and adjustable positive voltage regulators

1 This is information on a product in full production. July 2013 DocID7194 Rev 261/24LD1117 ALow drop fixed and adjustable positive voltage regulatorsDatasheet - production dataFeatures Low dropout voltage : V typ. @ IOUT = 1 A, 25 C Very low quiescent current: 5 mA typ. @ 25 C Output current up to 1 A fixed output voltage of: V, V, V adjustable version availability (VREF = V) Internal current and thermal limit Only 10 F 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 CDescriptionThe LD1117A is a low drop voltage regulator able to provide up to 1 A of output current, available also in adjustable versions (VREF = V).

2 In fixed versions, the following output voltages are offered: V, V, and 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 F minimum capacitor is needed for stability. Chip trimming allows the regulator to reach a very tight output voltage tolerance, within 2% at 25 1. Device summaryOrder codesOutput VLD1117 ASTRLD1117 ADT-TRAdjustable from Rev 26 Contents1 Diagram .. 32 Pin configuration .. 43 Maximum ratings .. 54 Schematic application .. 65 Electrical characteristics.

3 76 Typical application .. 107LD1117A adjustable : application note .. 128 Package mechanical data .. 139 Packaging mechanical data .. 1910 Revision history .. 23 DocID7194 Rev 263/24LD1117 ADiagram241 DiagramFigure 1. Block diagram Pin configurationLD1117A4/24 DocID7194 Rev 262 Pin configuration Note:The TAB is connected to the 2. Pin connections (top view) DPAKSOT-223TO-220 ADJ/GNDVOUT1 VIN23 ADJ/GNDVOUT1 VIN23 ADJ/GNDOUTPUTINPUTDocID7194 Rev 265/24LD1117 AMaximum ratings243 Maximum ratings Note:Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.

4 Beyond the above suggested max. power dissipation, a short-circuit may permanently damage the 2. Absolute maximum ratingsSymbolParameterValueUnitVINDC input voltage15 VPDP ower dissipation12 WTSTGS torage temperature range-40 to +150 CTOPO perating junction temperature range0 to +125 CTable 3. Thermal dataSymbolParameterSOT-223 DPAKTO-220 UnitRthJCThermal resistance junction-case1585 C/WRthJAThermal resistance junction-ambient11010050 C/WSchematic applicationLD1117A6/24 DocID7194 Rev 264 Schematic applicationFigure 3. Application circuit (for fixed output voltages) ADocID7194 Rev 267/24LD1117 AElectrical characteristics245 Electrical characteristicsRefer to the test circuits, TJ = 0 to 125 C, CO = 10 F, CI = 10 F, R = 120 between OUT-GND, unless otherwise specified.

5 Refer to the test circuits, TJ = 0 to 125 C, CO = 10 F, CI = 10 F, unless otherwise specified. Table 4. Electrical characteristics of LD1117A#12 SymbolParameterTest voltageVI = V, IO = 10 mA, TJ = 25 voltageIO = 0 to 1 A, VI = to 10 VOLine regulationVI = to 8 V, IO = 0 mA16mV VOLoad regulationVI = V, IO = 0 to 1 A110mV VOTemperature VOLong term stability1000 hrs, TJ = 125 input voltageIO = 100 mA10 VIdQuiescent currentVI 8 V, IO = 0 mA510mAIOO utput currentVI - VO = 5 V, TJ = 25 C10001200mAeNOutput noise voltageB = 10 Hz to 10 kHz, TJ = 25 C100 VSVRS upply voltage rejectionIO = 40 mA, f = 120 HzVI - VO = 3 V, Vripple = 1 VPP6080dBVDD ropout voltageIO = 100 = 500 = 1 VO(pwr)Thermal regulationTa = 25 C, 30 ms 5.

6 Electrical characteristics of LD1117A#18 SymbolParameterTest voltageVI = V, IO = 10 mA, TJ = 25 voltageIO = 0 to 1 A, VI = to 8 VOLine regulationVI = to 8 V, IO = 0 mA16mV VOLoad regulationVI = V, IO = 0 to 1 A110mV VOTemperature VOLong term stability1000 hrs, TJ = 125 input voltageIO = 100 mA10 VIdQuiescent currentVI 8 V, IO = 0 mA510mAIOO utput currentVI - VO = 5 V, TJ = 25 C1000mAElectrical characteristicsLD1117A8/24 DocID7194 Rev 26 Refer to the test circuits, TJ = 0 to 125 C, CO = 10 F, CI = 10 F, unless otherwise specified. Refer to the test circuits, TJ = 0 to 125 C, CO = 10 F, CI = 10 F, unless otherwise specified. eNOutput noise voltageB = 10 Hz to 10 kHz, TJ = 25 C100 VSVRS upply voltage rejectionIO = 40 mA, f = 120 HzVI - VO = 3 V, Vripple = 1 VPP6080dBVDD ropout voltageIO = 100 = 500 = 1 VO(pwr)Thermal regulationTa = 25 C, 30 ms 5.

7 Electrical characteristics of LD1117A#18 (continued)SymbolParameterTest 6. Electrical characteristics of LD1117A#33 SymbolParameterTest voltageVI = V, IO = 10 mA, TJ = 25 voltageIO = 0 to 1 A, VI = to 10 VOLine regulationVI = to 8 V, IO = 0 mA16mV VOLoad regulationVI = V, IO = 0 to 1 A110mV VOTemperature VOLong term stability1000 hrs, TJ = 125 input voltageIO = 100 mA10 VIdQuiescent currentVI 10 V, IO = 0 mA510mAIOO utput currentVI - VO = 5 V, TJ = 25 C10001200mAeNOutput noise voltageB =10 Hz to 10 kHz, TJ = 25 C100 VSVRS upply voltage rejectionIO = 40 mA, f = 120 HzVI - VO = 3 V, Vripple = 1 VPP6075dBVDD ropout voltageIO = 100 = 500 = 1 VO(pwr)Thermal regulationTa = 25 C, 30 ms 7.

8 Electrical characteristics of LD1117A ( adjustable )SymbolParameterTest voltageVI = V, IO = 10 mA, TJ = 25 voltageIO = 10 mA to 1 A, VI = to 10 VOLine regulationVI = to 8 V, IO = 0 mA16mVDocID7194 Rev 269/24LD1117 AElectrical characteristics24 VOLoad regulationVI = V, IO = 0 to 1 A110mV VOTemperature VOLong term stability1000 hrs, TJ = 125 input voltageIO = 100 mA10 VIadjAdjustment pin currentVin 10 V60120 A IadjAdjustment pin current changeVin - VO = to 10 V, IO = 10 mA to 1 A15 AIO(min)Minimum load currentVin = 10 V25mAIOO utput currentVI - VO = 5 V, TJ = 25 C10001200mAeNOutput noise voltageB =10 Hz to 10 kHz, TJ = 25 C100 VSVRS upply voltage rejectionIO = 40 mA, f = 120 HzVI - VO = 3 V, Vripple = 1 VPP6080dBVDD ropout voltageIO = 100 = 500 = 1 VO(pwr)Thermal regulationTa = 25 C, 30 ms 7.

9 Electrical characteristics of LD1117A ( adjustable ) (continued)SymbolParameterTest applicationLD1117A10/24 DocID7194 Rev 266 Typical application Figure 4. Negative supply LD1117 AVOUT = - VOUT(NOM)Figure 5. Circuit for increasing output voltage LD1117 AVOUT = VOUT(NOM) + (0 - 5V)Figure 6. voltage regulator with reference LD1117 AVOUT = VOUT(NOM) + VzVzDocID7194 Rev 2611/24LD1117 ATypical application24 Figure 7. Post-regulated dual supply LD1117 AVOUT2 = VOUT(NOM) ALD1117 AVOUT1 VOUT3 = -VOUT(NOM) ALD1117A adjustable : application noteLD1117A12/24 DocID7194 Rev 267 LD1117A adjustable : application noteThe LD1117A adjustable has a thermal stabilized V reference voltage between the OUT and ADJ pins.

10 IADJ is 60 A typ. (120 A max.) and IADJ is 1 A typ. (5 A max.).R1 is normally fixed to 120 . From Figure 6 the following is obtained:VOUT = VREF + R2 (IADJ + IR1) = VREF + R2 (IADJ +VREF /R1) = VREF (1 + R2 / R1) + R2 x normal applications the R2 value is in the range of a few k , so the R2 x IADJ product can not be considered in the VOUT calculation; the above expression then becomes:VOUT = VREF (1 + R2 / R1).In order to have a better load regulation it is important to realize a good Kelvin connection of R1 and R2 resistors. In particular, the R1 connection must be realized very close to the OUT and ADJ pins, while the R2 ground connection must be placed as near as possible to the negative load pin.