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| 型號(hào)： | TC1313-CS3EUN |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 500 mA Synchronous Buck Regulator, + 300 mA LDO |
| 中文描述： | 500毫安同步降壓穩(wěn)壓器，300 mA的LDO |
| 文件頁(yè)數(shù)： | 13/28頁(yè) |
| 文件大?。?/td> | 392K |
| 代理商： | TC1313-CS3EUN |
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2005 Microchip Technology Inc.
DS21974A-page 13
TC1313
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
3.1
SHDN2 is a logic-level input used to turn the LDO
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.
3.2
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 regulator.
An additional capacitor can be added to lower the LDO
regulator input ripple voltage.
3.3
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.
3.4
No Connect Pin (NC)
LDO Shutdown Input Pin (SHDN2)
No connection.
3.5
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.
3.6
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
).
3.7
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.
3.8
Buck Regulator Input Voltage Pin
(V
IN1
)
V
IN1
is the buck regulator power-input supply pin.
Connect a variable-input voltage source to V
IN1
.
Connect V
IN1
and V
IN2
together with board traces as
short as possible.
3.9
Buck Inductor Output Pin (L
X
)
Connect L
X
directly to the buck inductor. This pin
carries large signal-level current; all connections
should be made as short as possible.
3.10
Power Ground Pin (P
GND
)
Connect all large-signal level ground returns to P
GND
.
These large-signal level ground traces should have a
small loop area and length to prevent coupling of
switching noise to sensitive traces. Please see the
physical layout information supplied in
Section 5.0
“Application
Circuits/Issues”
recommendations.
3.11
Exposed Pad (EP)
For the DFN package, connect the EP to A
GND
with
vias into the A
GND
plane.
for
grounding
Pin No.
Name
Function
1
SHDN2
Active Low Shutdown Input for LDO Output Pin
2
V
IN2
V
OUT2
NC
Analog Input Supply Voltage Pin
3
LDO Output Voltage Pin
4
No Connect
5
A
GND
Analog Ground Pin
6
V
FB
/ V
OUT1
Buck Feedback Voltage (Adjustable Version)/Buck Output Voltage (Fixed Version) Pin
SHDN1
Active Low Shutdown Input for Buck Regulator Output Pin
7
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
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TC1313-CS3EUNTR | 500 mA Synchronous Buck Regulator, + 300 mA LDO |
| TC1313-BB0EMF | 500 mA Synchronous Buck Regulator, + 300 mA LDO |
| TC1313-BB0EMFTR | 500 mA Synchronous Buck Regulator, + 300 mA LDO |
| TC1313-BB0EUN | 500 mA Synchronous Buck Regulator, + 300 mA LDO |
| TC1313-BB0EUNTR | 500 mA Synchronous Buck Regulator, + 300 mA LDO |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC1313-DG0EMF | 功能描述:低壓差穩(wěn)壓器 - LDO PWM/LDO combo RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1313-DG0EMFTR | 功能描述:低壓差穩(wěn)壓器 - LDO PWM/LDO combo RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1313-PP0EMF | 功能描述:低壓差穩(wěn)壓器 - LDO PWM LDO combo PG RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1313-PP0EMFTR | 功能描述:低壓差穩(wěn)壓器 - LDO PWM LDO combo PG RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1313-RD1EMF | 功能描述:低壓差穩(wěn)壓器 - LDO PWM/LDO combo RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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