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参数资料
型号： TC1303A-AP1EUN
厂商： Microchip Technology Inc.
英文描述： 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
中文描述： 500毫安同步降压稳压器，300 mA的LDO具有电源就绪输出
文件页数： 18/36页
文件大小： 463K
代理商： TC1303A-AP1EUN
TC1303A/TC1303B/TC1303C/TC1304
DS21949B-page 18
2005 Microchip Technology Inc.
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
3.1
TC1303 LDO Shutdown Input Pin
(SHDN2)
SHDN2 is a logic-level input used to turn the LDO Reg-
ulator on and off. A logic-high (> 45% of V
IN
), will
enable the regulator output. A logic-low (< 15% of V
IN
)
will ensure that the output is turned off.
3.2
TC1304 Shutdown Input Pin
(SHDN)
SHDN is a logic-level input used to initiate the sequenc-
ing of the LDO output, then the buck regulator output.
A logic-high (> 45% of V
IN
), will enable the regulator
outputs. A logic-low (< 15% of V
IN
) will ensure that the
outputs are turned off.
3.3
LDO Input Voltage Pin (V
IN2
)
V
IN2
is a LDO power input supply pin. Connect variable
input voltage source to V
IN2
.
Connect V
IN1
and V
IN2
together with board traces as short as possible. V
IN2
provides the input voltage for the LDO. An additional
capacitor can be added to lower the LDO regulator
input ripple voltage.
3.4
LDO Output Voltage Pin (V
OUT2
)
V
OUT2
is a regulated LDO output voltage pin. Connect
a 1 μF or larger capacitor to V
OUT2
and A
GND
for proper
operation.
3.5
Power-Good Output Pin (PG)
PG is an output level indicating that V
OUT2
(LDO) is
within 94% of regulation. The PG output is configured
as a push-pull for the TC1303B and open-drain output
for the TC1303A, TC1303C and TC1304.
3.6
Analog Ground Pin (A
GND
)
A
GND
is the analog ground connection. Tie A
GND
to the
analog portion of the ground plane (A
GND
). See the
physical layout information in
Section 5.0 “Application
Circuits/Issues”
for grounding recommendations.
3.7
Buck Regulator Output Sense Pin
(V
FB
/V
OUT1
)
For V
OUT1
adjustable-output voltage options, connect
the center of the output voltage divider to the V
FB
pin.
For fixed-output voltage options, connect the output of
the buck regulator to this pin (V
OUT1
).
3.8
Buck Regulator Shutdown Input
Pin (SHDN1)
SHDN1 is a logic-level input used to turn the buck
regulator on and off. A logic-high (> 45% of V
IN
), will
enable the regulator output. A logic-low (< 15% of V
IN
)
will ensure that the output is turned off.
Pin No.
TC1303
Name
TC1304
Name
Function
1
SHDN2
—
Active Low Shutdown Input for LDO Output Pin
1
—
SHDN
Active Low Shutdown Input both Buck Regulator Output and LDO Output.
Initiates sequencing up and down
2
V
IN2
V
OUT2
PG
V
IN2
V
OUT2
PG
Analog Input Supply Voltage Pin
3
LDO Output Voltage Pin
4
Power-Good Output Pin
5
A
GND
V
FB
/V
OUT1
A
GND
V
FB
/V
OUT1
Analog Ground Pin
6
Buck Feedback Voltage (Adjustable Version) / Buck Output Voltage
(Fixed Version) Pin
7
SHDN1
—
Active Low Shutdown Input for Buck Regulator Output Pin
7
—
A
GND
V
IN1
L
X
P
GND
Exposed
Pad
Analog Ground Pin
8
V
IN1
L
X
P
GND
Exposed
Pad
Buck Regulator Input Voltage Pin
9
Buck Inductor Output Pin
10
Power Ground Pin
EP
For the DFN package, the center exposed pad is a thermal path to remove
heat from the device. Electrically this pad is at ground potential and should
be connected to A
GND
相关PDF资料
PDF描述
TC1303A-AP1EUNTR 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
TC1303A-AP2EMF 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
TC1303A-AP2EMFTR 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
TC1303A-AR0EMF 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
TC1303A-AR0EMFTR 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
相关代理商/技术参数
参数描述
TC1303A-AP1EUNTR 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
TC1303A-AP2EMF 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
TC1303A-AP2EMFTR 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
TC1303A-AP2EUN 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
TC1303A-AP2EUNTR 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output
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