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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1301A Datasheet

Dual LDO

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TC1301A pdf
TC1301A/B
Dual LDO with Microcontroller RESET Function
Features
• Dual Output LDO with Microcontroller Reset
Monitor Functionality:
- VOUT1 = 1.5V to 3.3V @ 300 mA
- VOUT2 = 1.5V to 3.3V @ 150 mA
www.DataSheet4U.com - VRESET = 2.20V to 3.20V
• Output Voltage and RESET Threshold Voltage
Options Available (See Table 8-1)
• Low Dropout Voltage:
- VOUT1 = 104 mV @ 300 mA, Typical
- VOUT2 = 150 mV @ 150 mA, Typical
• Low Supply Current: 116 µA, Typical
TC1301A/B with both output voltages available
• Reference Bypass Input for Low-Noise Operation
• Both Output Voltages Stable with a Minimum of
1 µF Ceramic Output Capacitor
• Separate Input for RESET Detect Voltage
(TC1301A)
• Separate VOUT1 and VOUT2 SHDN pins
(TC1301B)
• RESET Output Duration: 300 ms. Typical
• Power-Saving Shutdown Mode of Operation
• Wake-up from SHDN: 5.3 µs. Typical
• Small 8-pin DFN and MSOP Package Options
• Operating Junction Temperature Range:
- -40°C to +125°C
• Overtemperature and Overcurrent Protection
Applications
• Cellular/GSM/PHS Phones
• Battery-Operated Systems
• Hand-Held Medical Instruments
• Portable Computers/PDAs
• Linear Post-Regulators for SMPS
• Pagers
Related Literature
• AN765, “Using Microchip’s Micropower LDOs”,
DS00765, Microchip Technology Inc., 2002
• AN766, “Pin-Compatible CMOS Upgrades to
BiPolar LDOs”, DS00766, Microchip Technology
Inc., 2002
• AN792, “A Method to Determine How Much
Power a SOT23 Can Dissipate in an Application”,
DS00792, Microchip Technology Inc., 2001
Description
The TC1301A/B combines two Low Dropout (LDO)
regulators and a microcontroller RESET function into a
single 8-pin MSOP or DFN package. Both regulator
outputs feature low dropout voltage, 104 mV
@ 300 mA for VOUT1, 150 mV @ 150 mA for VOUT2,
low quiescent current consumption, 58 µA each and a
typical regulation accuracy of 0.5%. Several fixed-
output voltage and detector voltage combinations are
available. A reference bypass pin is available to further
reduce output noise and improve the power supply
rejection ratio of both LDOs.
The TC1301A/B is stable over all line and load
conditions with a minimum of 1 µF of ceramic output
capacitance, and utilizes a unique compensation
scheme to provide fast dynamic response to sudden
line voltage and load current changes.
For the TC1301A, the microcontroller RESET function
operates independently of both VOUT1 and VOUT2. The
input to the RESET function is connected to the VDET
pin.The SHDN2 pin is used to control the output of
VOUT2 only. VOUT1 will power-up and down with VIN.
In the case of the TC1301B, the detect voltage input of
the RESET function is connected internally to VOUT1.
Both VOUT1 and VOUT2 have independent shutdown
capability.
Additional features include an overcurrent limit and
overtemperature protection that, when combined,
provide a robust design for all load fault conditions.
Package Types
DFN8
8-Pin DFN/MSOP
TC1301A
MSOP8
RESET 1
VOUT1 2
GND 3
Bypass 4
8 VDET
7 VIN
6 VOUT2
5 SHDN2
RESET 1
VOUT1 2
GND 3
Bypass 4
8 VDET
7 VIN
6 VOUT2
5 SHDN2
DFN8
TC1301B
MSOP8
RESET 1
VOUT1 2
GND 3
Bypass 4
8 SHDN1
7 VIN
6 VOUT2
5 SHDN2
RESET 1
VOUT1 2
GND 3
Bypass 4
8 SHDN1
7 VIN
6 VOUT2
5 SHDN2
© 2005 Microchip Technology Inc.
DS21798B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1301A Datasheet

Dual LDO

No Preview Available !

TC1301A pdf
TC1301A/B
Functional Block Diagrams
TC1301A
VIN
LDO #1
300 mA
VOUT1
VIN
SHDN1
TC1301B
LDO #1
300 mA
SHDN2
LDO #2
150 mA
VOUT2
SHDN2
LDO #2
150 mA
www.DataSheet4U.comGND
Bypass
VDET
Bandgap
Reference
1.2V
VDET
GND
Bypass
Threshold
Detector
Time Delay
300 ms, typ
RESET
Bandgap
Reference
1.2V
Threshold Time Delay
Detector 300 ms typ
VOUT1
VOUT2
RESET
Typical Application Circuits
System RESET
2.8V @ 300 mA
COUT1
1 µF Ceramic
X5R
CBYPASS(Note)
10 nF Ceramic
TC1301A
1 RESET VDET 8
2 VOUT1
3 GND
VIN 7
VOUT2 6 2.6V @ 150 mA
BATTERY
CIN
1 µF
4 Bypass SHDN2 5
COUT2
1 µF Ceramic
X5R
ON/OFF Control VOUT2
2.7V
to
4.2V
System RESET
2.8V @ 300 mA
COUT1
1 µF Ceramic
X5R
ON/OFF Control VOUT1
TC1301B
1 RESET SHDN1 8
2 VOUT1
3 GND
VIN 7
VOUT2 6 2.6V @ 150 mA
BATTERY
CIN
1 µF
4 Bypass SHDN2 5
COUT2
1 µF Ceramic
X5R
2.7V
to
4.2V
Note: CBYPASS is optional
ON/OFF Control VOUT2
DS21798B-page 2
© 2005 Microchip Technology Inc.


Part Number TC1301A
Description Dual LDO
Maker Microchip Technology
Total Page 28 Pages
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