TC1301B-DAAVUATR Datasheet, PDF (1/28 Pages) Microchip Technology – Dual LDO with Microcontroller RESET Function

TC1301A/B
Dual LDO with Microcontroller RESET Function
Features
• Dual Output LDO with Microcontroller Reset
Monitor Functionality:
- V_OUT1 = 1.5V to 3.3V @ 300 mA
- V_OUT2 = 1.5V to 3.3V @ 150 mA
- V_RESET = 2.20V to 3.20V
• Output Voltage and RESET Threshold Voltage
Options Available (See Table 8-1)
• Low Dropout Voltage:
- V_OUT1 = 104 mV @ 300 mA (typical)
- V_OUT2 = 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 V_OUT1 and V_OUT2 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 V_OUT1, 150 mV @ 150 mA for V_OUT2,
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 V_OUT1 and V_OUT2. The
input to the RESET function is connected to the V_DET
pin.The SHDN2 pin is used to control the output of
V_OUT2 only. V_OUT1 will power-up and down with V_IN.
In the case of the TC1301B, the detect voltage input of
the RESET function is connected internally to V_OUT1.
Both V_OUT1 and V_OUT2 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
V_OUT1 2
GND 3
Bypass 4
8 V_DET
7 V_IN
6 V_OUT2
5 SHDN2
RESET 1
V_OUT1 2
GND 3
Bypass 4
8 V_DET
7 V_IN
6 V_OUT2
5 SHDN2
DFN8
TC1301B
MSOP8
RESET 1
V_OUT1 2
GND 3
Bypass 4
8 SHDN1
7 V_IN
6 V_OUT2
5 SHDN2
RESET 1
V_OUT1 2
GND 3
Bypass 4
8 SHDN1
7 V_IN
6 V_OUT2
5 SHDN2
© 2008 Microchip Technology Inc.
DS21798C-page 1