TC1300 Datasheet, PDF (1/16 Pages) Microchip Technology – 300 mA CMOS LDO with Shutdown, Bypass and Independent Delayed Reset Function

M
TC1300
300 mA CMOS LDO with Shutdown, Bypass and
Independent Delayed Reset Function
Features
• LDO with Integrated Microcontroller Reset
Monitor Functionality
• Low Input Supply Current (80 µA, typical)
• Very Low Dropout Voltage
• 10 µsec (typ.) Wake-Up Time from SHDN
• 300 mA Output Current
• Standard or Custom Output and Detected
Voltages
• Power-Saving Shutdown Mode
• Bypass Input for Quiet Operation
• Separate Input for Detected Voltage
• 140 msec Minimum RESET Output Duration
• Space-Saving MSOP Package
• Specified Junction Temperature Range:
-40°C to +125°C
Applications
• Battery-Operated Systems
• Portable Computers
• Medical Instruments
• Pagers
• Cellular / GSM / PHS Phones
Related Literature
• AN765, “Using Microchip’s Micropower LDOs”,
DS00765.
• AN766, “Pin-Compatible CMOS Upgrades to
Bipolar LDOs”, DS00766.
• AN792, “A Method to Determine How Much
Power a SOT23 Can Dissipate in an Application”,
DS00792.
Package Type
MSOP
RESET ¹
8 V_DET
V_OUT 2 _TC1300VUA 7 V_IN
GND ³
6 NC
Bypass 4
5 SHDN
General Description
The TC1300 combines a low dropout regulator and a
microcontroller reset monitor in an 8-Pin MSOP pack-
age. Total supply current is 80 µA (typical), 20 to 60
times lower than bipolar regulators.
The TC1300 has a precise output with a typical accu-
racy of ±0.5%. Other key features include low noise
operation, low dropout voltage and internal feed-
forward compensation for fast response to step
changes in load. The TC1300 has both over-tempera-
ture and over-current protection. When the shutdown
control (SHDN) is low, the regulator output voltage falls
to zero, RESET output remains valid and supply cur-
rent is reduced to 30 µA (typical). The TC1300 is rated
for 300 mA of output current and stable with a 1 µF out-
put capacitor.
An active-low RESET is asserted when the detected
voltage (V_DET) falls below the reset voltage threshold.
The RESET output remains low for 300 msec (typical)
after V_DET rises above reset threshold. The TC1300
also has a fast wake-up response time (10 µsec.,
typical) when released from shutdown.
Typical Application Circuit
RESET ¹ RESET
8
V_DET
V_DET
V_OUT
C₁
1 µF
2 _VOUT
V_IN ⁷
TC1300
3 _GND
NC ⁶
4 _{Bypass SHDN} 5
C₂
1 µF
Battery
C_BYPASS
470 pF
(Optional)
Shutdown Control
(from Power
Control Logic)
 2002 Microchip Technology Inc.
DS21385C-page 1