鈩?/div>
Operation: Selectable Output
Voltages for High Design Flexibility
鈥?Very Low Dropout Voltage
鈥?29碌V
RMS
Typical Output Noise
鈥?10碌sec (Typ.) Wake-Up Time from SHDN
鈥?150mA Output Current per Output
鈥?High Output Voltage Accuracy
鈥?Power-Saving Shutdown Mode
鈥?RESET Output Can Be Used as a Low Battery
Detector or Processor Reset Generator
鈥?Over Current Protection and Over Temperature
Shutdown
鈥?Space Saving 10-Pin MSOP Package
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 operated systems, total supply current is
typically 120碌A 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 input pin
allows the user to select V
OUT1
and V
OUT2
from 3
different values (2.5V, 2.8V and 3.0V).
An active low RESET is asserted when the detected
voltage (V
DET
) falls below the 2.63V reset voltage
threshold. The RESET output remains low for 300msec
(typical) after V
DET
rises above 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 20碌A
(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 150mV at full load).
The device also incorporates both over temperature
and over current protection. Each regulator is stable
with an output capacitor of only 1碌F and has a
maximum output current of 150mA. The TC1305 is
featured in a 10-Pin MSOP package with selective
output voltages.
Junction
Temperature
Range
-40掳C to +85掳C
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Load Partitioning
Battery Operated Systems
Portable Computers
Medical Instruments
Instrumentation
Pagers and Cellular/PHS Phones
Linear Post-Regulator for SMPS
Device Selection Table
Part Number
TC1305R-DVUN
Package
10-Pin MSOP
Typical Application
V
DET
V
IN
GND
4
SELECT
SHDN1
5
1
2
3
10
9
3.3碌F
RESET
V
OUT2
V
OUT1
3.3碌F
7
6
470pF Bypass
(Optional)
SHDN2
NOTE:
鈥淩鈥?denotes the suffix for the 2.63V V
DET
threshold.
鈥淒鈥?indicates V
OUT1
= V
OUT2
= 2.5, 2.8, 3.0 (selectable).
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
TC1305
8
Package Type
10-Pin MSOP
V
DET
1
V
IN
2
GND 3
SELECT 4
SHDN1 5
10 RESET
9 V
OUT2
TC1305
8 V
OUT1
7 Bypass
6
SHDN2
2002 Microchip Technology Inc.
DS21526A-page 1
漏
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