TC1306_07 Datasheet, PDF (1/18 Pages) Microchip Technology – Dual 150mA CMOS LDO With Select Mode™ Operation, Shutdown and RESET Output

Obsolete Device
TC1306
Dual 150mA CMOS LDO With Select Mode™ Operation,
Shutdown and 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
• 10μsec (Typ.) Wake-Up Time from SHDN
• Maximum 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 8-Pin MSOP Package
Applications
• Load Partitioning
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Pagers and Cellular/GSM/PHS Phones
• Linear Post-Regulator for SMPS
Device Selection Table
Part Number
Package
Junction
Temperature
Range
TC1306R-BDVUA 8-Pin MSOP -40°C to +125°C
NOTE: “R” denotes the suffix for the 2.63V RESET threshold.
“B” indicates V_OUT1 = 1.8V (fixed).
“D” indicates V_OUT2 = 2.8V, 3.0V (selectable).
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
8-Pin MSOP
V_{IN 1}
GND 2
SELECT ³
SHDN1 4
TC1306
8 RESET
7 ^VOUT2
6 ^VOUT1
5 SHDN2
General Description
The TC1306 combines two CMOS Low Dropout Regu-
lators and a Microprocessor Monitor in a space saving
8-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 TC1306 features selectable output voltages for
higher design flexibility. The dual-state SELECT input
pin allows the user to select V_OUT2 from 2 different
values (2.8V and 3.0V). V_OUT1 supplies a fixed 1.8V
voltage.
An active low RESET is asserted when the output
voltage V_OUT2 falls below the 2.63V reset voltage
threshold. The RESET output remains low for 300msec
(typical) after V_OUT2 rises above reset threshold. When
the shutdown control (SHDN1) is low, the regulator
output voltage V_OUT1 falls to zero and RESET output
remains valid. When the shutdown control (SHDN2) is
low, the regulator output voltage V_OUT2 falls to zero and
RESET output is low.
Other key features for the device include ultra low noise
operation, fast response to step changes in load and
very low dropout voltage (typically 125mV 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.
Typical Application
V_IN
1
2
GND
3
SELECT
SHDN1
4
TC1306
8
RESET
7
V_OUT2
3.3µF
6
V_OUT1
3.3µF
5
SHDN2
© 2007 Microchip Technology Inc.
DS21527C-page 1