Datasheet

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 2002-2012 Microchip Technology Inc. DS21357C-page 1

TC1108

Features

• Extremely Low Supply Current (50A, Typ.)

• Very Low Dropout Voltage

• 300mA Output Current

• High Output Voltage Accuracy

• Standard or Custom Output Voltages

• Over Current and Over Temperature Protection

Applications

• Battery Operated Systems

• Portable Computers

• Medical Instruments

• Instrumentation

• Cellular/GSM/PHS Phones

• Linear Post-Regulators for SMPS

• Pagers

Device Selection Table

NOTE: xx indicates output voltages

Available Output Voltages: 2.5, 2.8, 3.0, 3.3, 5.0.

Other output voltages are available. Please contact Microchip

Technology Inc. for details.

Package Type

General Description

The TC1108 is a fixed output, high accuracy (typically

±0.5%) CMOS low dropout regulator. Total supply

current is typically 50A at full load (20 to 60 times

lower than in bipolar regulators).

TC1108 key features include ultra low noise operation,

very low dropout voltage (typically 240mV at full load),

and fast response to step changes in load.

The TC1108 incorporates both over temperature and

over current protection. The TC1108 is stable with an

output capacitor of only 1F and has a maximum

output current of 300mA. It is available in a SOT-223

package.

Typical Application

Part Number Package

Junction

Temp. Range

TC1108-xxVDB 3-Pin SOT-223 -40°C to +125°C

SOT-223

321

OUT

GNDV

TC1108VDB

TC1108

OUT

1μF

GND

OUT

300mA CMOS LDO

Summary of content (12 pages)

PAGE 1
TC1108 300mA CMOS LDO Features General Description • • • • • • The TC1108 is a fixed output, high accuracy (typically ±0.5%) CMOS low dropout regulator. Total supply current is typically 50A at full load (20 to 60 times lower than in bipolar regulators). Extremely Low Supply Current (50A, Typ.
PAGE 2
TC1108 1.0 ELECTRICAL CHARACTERISTICS Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Absolute Maximum Ratings* Input Voltage .........................................
PAGE 3
TC1108 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. (3-Pin SOT-223) 3.0 Symbol Description 1 VIN 2 GND Ground terminal. 3 VOUT Regulated voltage output. Unregulated supply input. DETAILED DESCRIPTION 3.1 The TC1108 is a precision, fixed output LDO. Unlike bipolar regulators, the TC1108’s supply current does not increase with load current.
PAGE 4
TC1108 4.0 THERMAL CONSIDERATIONS 4.1 Thermal Shutdown Integrated thermal protection circuitry shuts the regulator off when die temperature exceeds 150°C. The regulator remains off until the die temperature drops to approximately 140°C. 4.2 Power Dissipation The amount of power the regulator dissipates is primarily a function of input and output voltage, and output current.
PAGE 5
TC1108 5.0 TYPICAL CHARACTERISTICS Note: The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. 2.00 10.0 RLOAD = 50Ω COUT = 1μF 1.
PAGE 6
TC1108 6.0 PACKAGING INFORMATION 6.1 Package Marking Information “1” = part number code “2” = represents temperature + date code + lot identity + subcontractor identity TC1108 (V) 6.2 Code TC1108-2.5VDB 110825 TC1108-2.8VDB 110828 TC1108-3.0VDB 110830 TC1108-3.3VDB 110833 TC1108-5.
PAGE 7
TC1108 6.3 Package Dimensions Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging 3-Pin SOT-223 .264 (6.70) .248 (6.30) .122 (3.10) .114 (2.90) .287 (7.30) .146 (3.70) .264 (6.70) .130 (3.30) .041 (1.04) .033 (0.84) PIN 1 .091 (2.30) TYP. .031 (0.80) .024 (0.60) .071 (1.80) MAX. .013 (0.33) .009 (0.24) 10° MAX. .004 (0.10) .001 (0.02) .181 (4.60) TYP. .036 (0.91) MIN.
PAGE 8
TC1108 REVISION HISTORY Revision C (November 2012) Added a note to the package outline drawing. DS21357C-page 8  2002-2012 Microchip Technology Inc.
PAGE 9
TC1108 SALES AND SUPPORT Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. Your local Microchip sales office The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
PAGE 10
TC1108 NOTES: DS21357C-page10  2002-2012 Microchip Technology Inc.
PAGE 11
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 12
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