TC1305 Datasheet, PDF (1/18 Pages) Microchip Technology – Dual 150mA CMOS LDO With Select Mode™ Operation, Shutdown and Independent RESET Output

TC1305
Dual 150mA CMOS LDO With Select Mode^™ Operation,
Shutdown and Independent RESET Output
Features
• Extremely Low Supply Current for Longer Battery
Life
• Select Mode^™ Operation: Selectable Output
Voltages for High Design Flexibility
• Very Low Dropout Voltage
• 29µV_RMS Typical Output Noise
• 10µsec (Typ.) Wake-Up Time from SHDN
• 150mA Output Current per Output
• High Output Voltage Accuracy
• Power-Saving Shutdown Mode
• RESET Output Can Be Used as a Low Battery
Detector or Processor Reset Generator
• Over Current Protection and Over Temperature
Shutdown
• Space Saving 10-Pin MSOP Package
Applications
• 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
Package
Junction
Temperature
Range
TC1305R-DVUN 10-Pin MSOP -40°C to +85°C
NOTE: “R” denotes the suffix for the 2.63V V_DET threshold.
“D” indicates V_OUT1 = V_OUT2 = 2.5, 2.8, 3.0 (selectable).
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
10-Pin MSOP
V_DET 1
V_IN 2
GND 3
SELECT 4
SHDN1 5
TC1305
10 RESET
9 VOUT2
8 VOUT1
7 Bypass
6 SHDN2
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 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 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 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 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 1µF and has a
maximum output current of 150mA. The TC1305 is
featured in a 10-Pin MSOP package with selective
output voltages.
Typical Application
V_DET
1
V_IN
2
3
GND
4
SELECT
5
SHDN1
TC1305
10
RESET
9
3.3µF
V_OUT2
8
3.3µF
V_OUT1
7
470pF Bypass
(Optional)
6
SHDN2
© 2002 Microchip Technology Inc.
DS21526A-page 1