TC1268 MICROCHIP [Microchip Technology], TC1268 Datasheet

no-image

TC1268

Manufacturer Part Number
TC1268
Description
500mA Fixed Output, Fast Response CMOS LDO with Shutdown
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
Features
• Very Low Dropout Voltage
• 500mA Output Current
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Over Current and Over Temperature Protection
• SHDN Input for Active Power Management
• ERROR Output to Detect Low Battery
• 5µsec (typical) Wake-up Time from SHDN
Applications
• RAMBUS Memory Module
• Battery-Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulator for SMPS
• Pagers
• Digital Cameras
Device Selection Table
*Other output voltages and package options are available.
Please contact Microchip Technology Inc. for details.
Package Type
©
TC1268-2.5VOA
Part Number
2002 Microchip Technology Inc.
500mA Fixed Output, Fast Response CMOS LDO with Shutdown
BYPASS
V
GND
OUT
NC
1
2
3
4
Output*
Voltage
8-Pin SOIC
(V)
2.5
TC1268
8-Pin SOIC -40°C to +125°C
Package
8
7
6
5
Temp. Range
Junction
V
NC
SHDN
ERROR
IN
General Description
The TC1268 is a fixed output, fast turn-on, high
accuracy (typically ±0.5%) CMOS low dropout
regulator. Designed specifically for battery-operated
systems, the TC1268’s CMOS construction eliminates
wasted ground current, significantly extending battery
life. Total supply current is typically 80µA at full load (20
to 60 times lower than in bipolar regulators).
TC1268’s key features include ultra low noise, very low
dropout voltage (typically 350mV at full load), and
fast response to step changes in load. The TC1268
also has a fast wake-up response time (5µsec typically)
when
incorporates both over temperature and over current
protection. The TC1268 is stable with an output
capacitor of only 1µF and has a maximum output
current of 500mA.
Typical Application
V
IN
released
V
GND
IN
TC1268
from
TC1268
SHDN
V
OUT
shutdown.
+
SHDN
DS21379B-page 1
C
1µF
OUT
The
V
OUT
TC1268

Related parts for TC1268

TC1268 Summary of contents

Page 1

... Total supply current is typically 80µA at full load ( times lower than in bipolar regulators). TC1268’s key features include ultra low noise, very low dropout voltage (typically 350mV at full load), and fast response to step changes in load. The TC1268 also has a fast wake-up response time (5µsec typically) when released incorporates both over temperature and over current protection ...

Page 2

... Absolute Maximum Ratings* Input Voltage .........................................................6.5V Power Dissipation................Internally Limited (Note 6) Maximum Voltage on Any Pin ........ V IN Operating Temperature ............... -40°C < T Storage Temperature.......................... -65°C to +150°C TC1268 ELECTRICAL SPECIFICATIONS Electrical Characteristics 1V OUT type specifications apply for junction temperatures of -40°C to +125°C. ...

Page 3

... TC1268 ELECTRICAL SPECIFICATIONS Electrical Characteristics 1V OUT type specifications apply for junction temperatures of -40°C to +125°C. ERROR Output V Minimum Operating Voltage MIN V Output Logic Low Voltage OL V ERROR Threshold Voltage TH Note the regulator output voltage setting – ...

Page 4

... In order to V OUT not see the bus voltage drop during the transition from C OUT high power to low power, the TC1268 has a very fast 1µF wake-up time of 5µsec to support the 2.5V rail. This ON OFF SHDN makes the TC1268 ideal for applications involving ...

Page 5

... Pull-up resistor R1 can be tied any other voltage less than (V OUT IN FIGURE 3-3: and transient V OUT V TH ERROR TC1268 falls out of OUT , OUT at 2.375V (typ.) for a 2. OUT is above V + OUT TH of the processor IH + 0.3V). IN ERROR OUTPUT ...

Page 6

... MAX = (125 – 95) dissipation = 500mW In this example, the TC1268 dissipates a maximum of 314mW; below the allowable limit of 500mW 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 7

... 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. Fast Response TC1268 SHDN Conditions ...

Page 8

... TC1268 6.0 PACKAGING INFORMATION 6.1 Package Marking Information Package marking data not available at this time. 6.2 Taping Form Component Taping Orientation for 8-Pin SOIC (Narrow) Devices PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package 8-Pin SOIC (N) 6.3 Package Dimensions 8-Pin SOIC .050 (1.27) TYP. ...

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. TC1268 DS21379B-page 9 ...

Page 10

... TC1268 NOTES: DS21379B-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. © TC1268 Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...

Page 12

W ORLDWIDE AMERICAS Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: http://www.microchip.com Rocky Mountain 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7966 Fax: 480-792-7456 Atlanta 500 Sugar Mill Road, ...

Related keywords