TC1174 Microchip, TC1174 Datasheet

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TC1174

Manufacturer Part Number
TC1174
Description
300mA CMOS LDO with Shutdown and VREF Bypass
Manufacturer
Microchip
Datasheet

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Features
• Extremely Low Supply Current (50µA, Typ.)
• Very Low Dropout Voltage
• 300mA Output Current
• Adjustable Output Voltages
• Power Saving Shutdown Mode
• Bypass Input for Ultra Quiet Operation
• Over Current and Over Temperature Protection
• Space-Saving MSOP Package Option
Applications
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulators for SMPS
• Pagers
Device Selection Table
Package Type
©
Part Number
TC1174VOA
TC1174VUA
2002 Microchip Technology Inc.
300mA CMOS LDO with Shutdown and V
V
GND
V
GND
ADJ
ADJ
OUT
OUT
NC
NC
Adjustable
Adjustable 8-Pin MSOP -40°C to +125°C
Voltage
Output
(V)
1
2
3
4
1
2
3
4
8-Pin MSOP
TC1174VOA
TC1174VUA
8-Pin SOIC
8-Pin SOIC
Package
5
5
8
7
6
8
7
6
V
NC
V
NC
SHDN
Bypass
SHDN
Bypass
IN
IN
-40°C to +125°C
Temp. Range
Junction
General Description
The TC1174 is an adjustable output CMOS low dropout
regulator. Total supply current is typically 50µA at full
load (20 to 60 times lower than in bipolar regulators).
TC1174 key features include ultra low noise operation
(plus optional Bypass input); very low dropout voltage
(typically 270mV at full load) and internal feed-forward
compensation for fast response to step changes in
load. Supply current is reduced to 0.05µA (typical) and
V
The TC1174 incorporates both over temperature and
over current protection. The TC1174 is stable with an
output capacitor of only 1µF and has a maximum
output current of 300mA.
Typical Application
OUT
V
OUT
falls to zero when the shutdown input is low.
C1
1µF
+
470K
470K
R2
R1
V
OUT
1
2
3
4
TC1174
V
GND
NC
ADJ
= V
OUT
REF
TC1174
REF
x
[
Bypass
— + 1
R1
R2
SHDN
Bypass
V
NC
IN
]
DS21363B-page 1
8
7
6
5
V
NC
Shutdown
Control
(from Power
Control Logic)
C
470pF
(Optional)
IN
BYPASS

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TC1174 Summary of contents

Page 1

... Supply current is reduced to 0.05µA (typical) and V falls to zero when the shutdown input is low. OUT The TC1174 incorporates both over temperature and over current protection. The TC1174 is stable with an output capacitor of only 1µF and has a maximum output current of 300mA. Typical Application V ...

Page 2

... SS Power Dissipation................Internally Limited (Note 5) Maximum Voltage on Any Pin ........ V IN Operating Temperature Range...... -40°C < T Storage Temperature.......................... -65°C to +150°C TC1174 ELECTRICAL SPECIFICATIONS Electrical Characteristics 1V OUT type specifications apply for junction temperatures of -40°C to +125°C. Symbol ...

Page 3

... Shutdown control input. The regulator is fully enabled when a logic high is applied to this input. The regulator enters shutdown when a logic low is applied to this input. During shutdown, output voltage falls to zero and supply current is reduced to 0.05µA (typical connect Unregulated supply input. IN 2002 Microchip Technology Inc. © TC1174 Description DS21363B-page 3 ...

Page 4

... R1 and R2 (Figure 3-1). The ohmic values of these C BYPASS resistors should be between 470K and 3M to minimize 470pF (Optional) bleeder current. The output voltage setting is calculated using the following equation. EQUATION 3-1: The voltage adjustment range of the TC1174 is from REF IN to ground is required. OUT to GND if there IN [ ...

Page 5

... D MAX of approxi (125 – 55) = 350mW In this example, the TC1174 dissipates a maximum of 155mW; below the allowable limit of 350mW similar manner, Equation 4-1 and Equation 4-2 can be used to calculate maximum current and/or input voltage limits. For example, the maximum allowable V is found by substituting the maximum allowable ...

Page 6

... TC1174 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 ...

Page 7

... TR Suffix Device Carrier Width (W) Pitch (P) Part Per Full Reel 2500 User Direction of Feed P Standard Reel Component Orientation for TR Suffix Device Carrier Width (W) Pitch (P) Part Per Full Reel 2500 TC1174 W Reel Size Reel Size 13 in DS21363B-page 7 ...

Page 8

... TC1174 6.3 Package Dimensions 8-Pin MSOP .122 (3.10) .114 (2.90) .026 (0.65) TYP. .122 (3.10) .114 (2.90) .016 (0.40) .006 (0.15) .010 (0.25) .002 (0.05) 8-Pin SOIC .157 (3.99) .150 (3.81) .050 (1.27) TYP. .197 (5.00) .189 (4.80) .020 (0.51) .010 (0.25) .013 (0.33) .004 (0.10) DS21363B-page 8 PIN 1 .197 (5.00) .189 (4.80) .043 (1.10) 6° MAX. MAX. .028 (0.70) .016 (0.40) PIN 1 .244 (6.20) .228 (5.79) .069 (1.75) .053 (1.35) ° ...

Page 9

... The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.  2002 Microchip Technology Inc. TC1174 DS21363B-page 9 ...

Page 10

... TC1174 NOTES: DS21363B-page 10  2002 Microchip Technology Inc. ...

Page 11

... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc. © TC1174 Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...

Page 12

... Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology Taiwan 11F-3, No. 207 ...

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