TC1305(2001) View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
TC1305
(Rev.:2001)
(Rev.:2001)
Microchip Technology
TC1305 Datasheet PDF : 10 Pages
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TC1305
Dual 150mA CMOS LDO With SelectModeTM , Shutdown and
Independent RESET Output
FEATURES
s Extremely Low Supply Current for Longer Battery
Life!
s SelectModeTM: Selectable Output Voltages for
High Design Flexibility
s Very Low Dropout Voltage
s 10µsec (Typ.) Wake Up Time from SHDN
s Guaranteed 150mA Output Current
s High Output Voltage Accuracy
s Power-Saving Shutdown Mode
s RESET Output Can Be Used as a Low Battery
Detector or Processor Reset Generator
s Over-Current and Over-Temperature Protection
s Space-Saving 10-Pin MSOP Package
APPLICATIONS
s Battery Operated Systems
s Portable Computers
s Medical Instruments
s Instrumentation
s Cellular / PHS Phones
s Linear Post-Regulator for SMPS
s Pagers
TYPICAL APPLICATION
VDET
VIN
VDET
RESET
VIN
VOUT2
TC1305
GND
VOUT1
SELECT Bypass
SHDN1 SHDN2
RESET
VOUT2
3.3µF
VOUT1
3.3µF
470pF
(Optional)
GENERAL DESCRIPTION
The TC1305 combines two CMOS Low Dropout Regu-
lators and a Microprocessor Monitor in a space-saving 10-
Pin MSOP package. Designed specifically for battery-oper-
ated systems, the device’s CMOS construction eliminates
wasted ground current, significantly extending battery life.
Total supply current is typically 120µA at full load, 20 to 60
times lower than in bipolar regulators!
The TC1305 features selectable output voltages for
higher design flexibility. The tri-state SELECT pin allows the
user to select VOUT1 and VOUT2 from 3 different values (2.5V,
2.8V and 3.0V).
An active low RESET is asserted when the detected
voltage (VDET) falls below the 2.63V reset voltage threshold.
The RESET output remains low for 300msec (typical) after
VDET rises above the reset threshold. When the shutdown
controls (SHDN1 and SHDN2) are low, the regulator output
voltages fall to zero, RESET output remains valid and supply
current is reduced to 20µA (typ.).
Other key features for the device include ultra low-noise
operation, fast response to step changes in load, and very
low dropout voltage (typically 240mV at full load). The
device also incorporates both over-temperature and over-
current protection. Each regulator is stable with an output
capacitor of only 1µF and has a maximum output current of
150mA. The 1305 is featured in a 10-pin MSOP package
with selective output voltages.
ORDERING INFORMATION
Part
Number
Package
Junction
Temp. Range
TC1305R-DVUN
10-Pin MSOP – 40°C to +125°C
NOTE: The "R" denotes the suffix for the 2.63V VDET threshold
Available Output Voltages:
D indicates VOUT1 = VOUT2 = 2.5, 2.8, 3.0 (selectable)
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
PIN CONFIGURATION
10-Pin MSOP
VDET 1
VIN 2
GND 3
SELECT 4
SHDN1 5
TC1305
10 RESET
9 VOUT2
8 VOUT1
7 Bypass
6 SHDN2
© 2001 Microchip Technology Inc. DS21526A
TC1305-1 12/22/00
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