Datasheet

ManualsBrandsST ManualsIntegrated Circuits (ICs)LDO Voltage Regulator 3.3V 2A SOT-223

July 2017

DocID030319 Rev 3

1/20

This is information on a product in full production.

www.st.com

LDL1117

1.2 A high PSRR low-dropout linear voltage regulator

Datasheet - production data

Features

 Input voltage from 2.5 V to 18 V

 20 V AMR

 Available on fixed output voltages: 1.2 V

(1.185 V), 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5.0

V (other options are available on request)

 Guaranteed output current 1.2 A

 Typical dropout 350 mV@1.2 A

 Internal thermal, current and power limitation

 High PSRR 87 dB @120 Hz

 Operating temperature range: -40 °C to 125

°C package SOT223

Applications

 Consumer

 Industrial

 SMPS

 Motherboard P.O.L.

 DC-DC post-regulation

Description

The LDL1117 provides 1.2 A of maximum current

with an input voltage range from 2.5 V to 18 V,

and a typical dropout voltage of 350 mV@1.2 A.

The high power supply rejection ratio of 87 dB at

120 Hz, rolling down to more than 40 dB at 100

kHz, makes the LDL1117 suitable for direct

regulations in SMPS and secondary linear

regulations in DC-DC converters.

This device includes current limit, SOA and

thermal protections.

Summary of content (20 pages)

PAGE 1
LDL1117 1.2 A high PSRR low-dropout linear voltage regulator Datasheet - production data Applications      Consumer Industrial SMPS Motherboard P.O.L. DC-DC post-regulation Description Features         Input voltage from 2.5 V to 18 V 20 V AMR Available on fixed output voltages: 1.2 V (1.185 V), 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5.0 V (other options are available on request) Guaranteed output current 1.2 A Typical dropout 350 mV@1.
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Contents LDL1117 Contents 1 Block diagram.................................................................................. 5 2 Pin configuration ............................................................................. 6 3 Typical application .......................................................................... 7 4 5 Maximum ratings ............................................................................. 8 Electrical characteristics ...................................................
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LDL1117 List of tables List of tables Table 1: Pin description .............................................................................................................................. 6 Table 2: Absolute maximum ratings ........................................................................................................... 8 Table 3: Thermal data .................................................................................................................................
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List of figures LDL1117 List of figures Figure 1: Block diagram .............................................................................................................................. 5 Figure 2: Pin configuration (top view) ......................................................................................................... 6 Figure 3: Typical application schematic ......................................................................................................
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LDL1117 1 Block diagram Block diagram Figure 1: Block diagram DocID030319 Rev 3 5/20
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Pin configuration 2 LDL1117 Pin configuration Figure 2: Pin configuration (top view) Table 1: Pin description Pin name Pin number GND 1 Ground VOUT 2 Output voltage VIN 3 Input voltage The tab is connected to VOUT.
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LDL1117 3 Typical application Typical application Figure 3: Typical application schematic DocID030319 Rev 3 7/20
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Maximum ratings 4 LDL1117 Maximum ratings Table 2: Absolute maximum ratings Symbol VIN Parameter Input supply voltage Value Unit -0.3 to 20 V VOUT Output voltage -0.3 to VIN +0.
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LDL1117 5 Electrical characteristics Electrical characteristics (TJ = 25 °C, VIN = VOUT + 1 V or 2.6 V, whichever is greater; CIN = 1 μF; COUT = 4.7 μF; IOUT = 10 mA) Table 4: Electrical characteristics Symbol VIN VUVLO VOUT Parameter Test conditions Operating input voltage Min. 2.6 Turn-on threshold 2.3 Hysteresis VOUT accuracy Typ. IOUT = 10 mA -40 °C < TJ < 125 °C -3 +3 % IOUT = 10 mA to 1.2 A -40 °C < TJ < 125 °C VDROP Dropout voltage(2) IOUT = 1.2 A, VOUT > 2.
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Application information LDL1117 6 Application information 6.1 Thermal and short-circuit protections The LDL1117 is self-protected from short-circuit conditions and overtemperature. When the output load is higher than the one supported by the device, the output current rises until the limit of typically 2 A is reached. The current limit value is dependent of the dissipated power, thanks to an additional SOA protection, so that the maximum power is limited.
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Typical performance characteristics LDL1117 7 Typical performance characteristics (The following plots are referred to the typical application circuit and, unless otherwise noted, at TA = 25 °C) Figure 4: Output voltage vs temperature (VIN = 2.6 V, VOUT = 1.2 V, no-load) Figure 5: Output voltage vs temperature (VIN = 2.6 V, VOUT = 1.
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Typical performance characteristics LDL1117 Figure 8: Line regulation vs temperature (VIN = 6 to 18 V, VOUT = 5 V, IOUT = 10 mA) Figure 9: Line regulation vs temperature (VIN = 2.5 to 18 V, VOUT = 1.2 V, IOUT = 10 mA) Figure 10: Load regulation vs temperature (VIN = 6 V, VOUT = 5 V, IOUT = 10 to 1200 mA) Figure 11: Load regulation vs temperature (VIN = 2.6 V, VOUT = 1.
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Typical performance characteristics LDL1117 Figure 14: Quiescent current vs temperature (600 mA) Figure 15: Quiescent current vs temperature (1.2 A) Figure 16: Short-circuit current vs dropout voltage (VOUT = 5 V) Figure 17: Short-circuit current vs dropout voltage (VOUT = 1.2 V) Figure 18: SVR vs frequency Figure 19: Output noise spectral density (VO = 1.
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Typical performance characteristics 14/20 LDL1117 Figure 20: Stability plan (VOUT = 5 V) Figure 21: Stability plan (VOUT = 1.2 V) Figure 22: Turn-on time (VOUT = 5 V) Figure 23: Turn-on time (VOUT = 1.2 V) Figure 24: Line transient (VOUT = 5 V) Figure 25: Line transient (VOUT = 1.
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Typical performance characteristics LDL1117 Figure 26: Load transient (VOUT = 1.
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Package information 8 LDL1117 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: www.st.com. ECOPACK® is an ST trademark. 8.
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LDL1117 Package information Table 5: SOT223 package mechanical data mm Dim. Min. Typ. A Max. 1.8 A1 0.02 0.1 B 0.6 0.7 0.85 B1 2.9 3 3.15 c 0.24 0.26 0.35 D 6.3 6.5 6.7 e 2.3 e1 4.6 E 3.3 3.5 3.7 H 6.7 7.0 7.
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Ordering information 9 LDL1117 Ordering information Table 6: Order code Part number LDL1117 18/20 Marking Order code Output voltage (V) LL12 LDL1117S12R 1.185 LL15 LDL1117S15R 1.5 LL18 LDL1117S18R 1.8 LL25 LDL1117S25R 2.5 LL30 LDL1117S30R 3.0 LL33 LDL1117S33R 3.3 LL50 LDL1117S50R 5.
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LDL1117 10 Revision history Revision history Table 7: Document revision history Date Revision Changes 27-Feb-2017 1 Initial release. 30-Mar-2017 2 Updated features in cover page and Section 9: "Ordering information". Minor text changes. 04-Jul-2017 3 In Table 3: "Thermal data": - thermal data values changed Minor text changes.
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