Microchip Technology TC1303BDM-DDBK1 ユーザーズマニュアル
TC1303B DUAL-OUTPUT
REGULATOR USER’S GUIDE
©
2005 Microchip Technology Inc.
DS51563A-page 7
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The TC1303B Dual-Output Regulator with Power-Good Output Demo Board
demonstrates Microchip’s TC1303B Dual Output Voltage Regulator over its entire
range of operation.
demonstrates Microchip’s TC1303B Dual Output Voltage Regulator over its entire
range of operation.
2.2
FEATURES
The TC1303B Dual-Output Regulator with Power-Good Output Demo Board has the
following features:
following features:
• Test points for applying input voltage (0V to 5.5V)
• Test points for connecting external loads
- Buck V
OUT1
= 0 mA to 500 mA
- LDO V
OUT2
= 0 mA to 300 mA
- PG Output
- Shutdown V
OUT1
and shutdown V
OUT2
• The fixed output voltages for the TC1303B can be determined by using the data
sheet section titled “Product Identification System”. Refer to the TC1303B data
sheet (DS21949) for details.
sheet (DS21949) for details.
2.3
GETTING STARTED
The TC1303B Dual-Output Regulator with Power-Good Output Demo Board is fully
assembled and tested for evaluating the TC1303B device operation.
assembled and tested for evaluating the TC1303B device operation.
2.3.1
Power Input and Output Connections
2.3.1.1
POWERING THE TC1303B DUAL-OUTPUT REGULATOR WITH
POWER-GOOD OUTPUT DEMO BOARD
POWER-GOOD OUTPUT DEMO BOARD
For normal operation, it is not necessary to pull up the shutdown pins of the TC1303B
device, pull-up resistors are placed on the board.
device, pull-up resistors are placed on the board.
1.
Apply the input voltage (+2.7V to +5.5V for normal operation) to board test point
TP2 (+V
TP2 (+V
IN
) and TP4 (P
GND
).
2.
Connect buck regulator load (0 mA to 500 mA for normal operation) to board test
point TP3 (+V
point TP3 (+V
O1
) and TP7 (P
GND
).
3.
Connect LDO regulator load (0 mA to 300 mA for normal operation) to TP10
(+V
(+V
O2
) and TP11 (A
GND
).
4.
The power-good output signal is available on test point TP5 (PG).
5.
To shutdown V
OUT1
, a jumper wire from TP8, (SHDN1) to the A
GND
test point
(TP11) can be used. This will disable the buck regulator output voltage (the LDO
output voltage is not affected).
output voltage is not affected).
6.
To shutdown V
OUT2
, a jumper wire from TP9 (SHDN2) to the A
GND
test point
(TP11) can be used. This will disable the LDO output voltage (the buck regulator
output voltage is not affected).
output voltage is not affected).