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參數(shù)資料
| 型號(hào)： | MCP1827S-1802EEB |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 1.5A, Low Voltage, Low Quiescent Current LDO Regulator |
| 中文描述： | 1.5安培的電流，低電壓，低靜態(tài)電流LDO穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 19/32頁(yè) |
| 文件大小： | 968K |
| 代理商： | MCP1827S-1802EEB |
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2006 Microchip Technology Inc.
DS22001B-page 19
MCP1827/MCP1827S
5.0
APPLICATION CIRCUITS/
ISSUES
5.1
Typical Application
The MCP1827/MCP1827S is used for applications that
require high LDO output current and a power good
output.
FIGURE 5-1:
Typical Application Circuit.
5.1.1
APPLICATION CONDITIONS
5.2
Power Calculations
5.2.1
POWER DISSIPATION
The internal power dissipation within the MCP1827/
MCP1827S is a function of input voltage, output
voltage, output current and quiescent current.
Equation 5-1 can be used to calculate the internal
power dissipation for the LDO.
EQUATION 5-1:
P
LDO
Where:
In addition to the LDO pass element power dissipation,
there is power dissipation within the MCP1827/
MCP1827S as a result of quiescent or ground current.
The power dissipation as a result of the ground current
can be calculated using the following equation:
EQUATION 5-2:
The total power dissipated within the MCP1827/
MCP1827S is the sum of the power dissipated in the
LDO pass device and the P(I
GND
) term. Because of the
CMOS construction, the typical I
GND
for the MCP1827/
MCP1827S is 120 μA. Operating at a maximum of
3.465V results in a power dissipation of 0.49 milli-
Watts. For most applications, this is small compared to
the LDO pass device power dissipation and can be
neglected.
The
temperature specified for the MCP1827/MCP1827S is
+125
°
C
.
To estimate the internal junction temperature
of the MCP1827/MCP1827S, the total internal power
dissipation is multiplied by the thermal resistance from
junction to ambient (R
θ
JA
) of the device. The thermal
resistance from junction to ambient for the TO-220-5
package is estimated at 29.3
°
C/W.
maximum
continuous
operating
junction
EQUATION 5-3:
Package Type = TO-220-5
Input Voltage Range = 3.3V ± 5%
V
IN
maximum = 3.465V
V
IN
minimum = 3.135V
V
DROPOUT (max)
= 0.550V
V
OUT
(typical) = 2.5V
I
OUT
= 1.5A maximum
P
DISS
(typical) = 1.2W
Temperature Rise = 35.2
°
C
10 μF
V
OUT
= 2.5V @ 1.5A
R
1
C
10 k
Ω
PWRGD
SHDN
GND
2
4.7 μF
On
Off
C
MCP1827-2.5
1
3 4 5
3.3V
V
IN
V
IN MAX
)
)
V
OUT MIN
)
–
(
)
I
OUT MAX
)
)
×
=
P
LDO
=
LDO Pass device internal
power dissipation
Maximum input voltage
LDO minimum output voltage
V
IN(MAX)
V
OUT(MIN)
=
=
P
I GND
)
V
IN MAX
)
I
VIN
×
=
Where:
P
I(GND
=
Power dissipation due to the
quiescent current of the LDO
Maximum input voltage
Current flowing in the V
IN
pin
with no LDO output current
(LDO quiescent current)
V
IN(MAX)
=
=
I
VIN
T
J MAX
)
P
TOTAL
R
θ
JA
×
T
AMAX
+
=
T
J(MAX)
= Maximum continuous junction
temperature
P
TOTAL
= Total device power dissipation
R
θ
JA
= Thermal resistance from junction to
ambient
T
AMAX
= Maximum ambient temperature
相關(guān)PDF資料 |
PDF描述 |
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| MCP1827S-1802EET | 1.5A, Low Voltage, Low Quiescent Current LDO Regulator |
| MCP1827S-2502EAB | 1.5A, Low Voltage, Low Quiescent Current LDO Regulator |
| MCP1827S-2502EAT | 1.5A, Low Voltage, Low Quiescent Current LDO Regulator |
| MCP1827S-2502EEB | 1.5A, Low Voltage, Low Quiescent Current LDO Regulator |
| MCP1827S-2502EET | 1.5A, Low Voltage, Low Quiescent Current LDO Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP1827S-2502E/AB | 功能描述:低壓差穩(wěn)壓器 - LDO LDO 1.5A CMOS 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MCP1827S-2502E/EB | 功能描述:低壓差穩(wěn)壓器 - LDO LDO 1.5A CMOS 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MCP1827S-3002E/AB | 功能描述:低壓差穩(wěn)壓器 - LDO LDO 1.5A CMOS 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MCP1827S-3002E/AB | 制造商:Microchip Technology Inc 功能描述:; LEADED PROCESS COMPATIBLE:YES; PEAK RE 制造商:Microchip Technology Inc 功能描述:IC, LDO VOLT REG, 3V, 1.5A, TO-220-3 |
| MCP1827S-3002E/EB | 功能描述:低壓差穩(wěn)壓器 - LDO LDO 1.5A CMOS 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(lèi)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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