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參數(shù)資料
| 型號： | MAX15011 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Automotive 300mA LDO Regulators with Switched Output and Overvoltage Protector |
| 中文描述： | 用于汽車電子的300mA LDO穩(wěn)壓器，提供可切換輸出和過壓保護(hù) |
| 文件頁數(shù)： | 19/23頁 |
| 文件大小： | 479K |
| 代理商： | MAX15011 |
where V
SOURCE
= (V
OV
x 0.04) + V
2
in volts, and C
rss
is the MOSFET’s reverse transfer capacitance in pF.
Any external capacitance between GATE and PGND
adds up to C
rss
.
Power Dissipation/Junction Temperature
During normal operation, the MAX15009/MAX15011
have two main sources of internal power dissipation:
the LDO and the switched output.
The internal power dissipation due to the LDO can be
calculated as:
where V
IN
is the LDO input supply voltage in volts,
V
OUT_LDO
is the output voltage of the LDO in volts,
I
OUT_LDO
is the LDO total load current in mA, and
I
OUT_SW
is the switch load current in mA.
Calculate the power dissipation due to the switch as:
where
Δ
V
SW
is the switch dropout voltage in volts for
the given I
OUT_SW
current in mA.
The total power dissipation P
DISS
in mW as:
P
DISS
= P
LDO
+ P
SW
For prolonged exposure to overvoltage events, use the
V
IN
voltage expected during overvoltage conditions.
Under these circumstances the corresponding internal
power dissipation contribution, P
OVP
, calculated in the
previous section should also be included in the total
power dissipation, P
DISS
.
For a given ambient temperature, T
A
, calculate the
junction temperature, T
J
, as follows:
T
J
= T
A
+ P
DISS
x
θ
JA
where T
J
and T
A
are in °C and
θ
JA
is the junction-to-
ambient thermal resistance in °C/W as listed in the
Absolute Maximum Ratings section.
The junction temperature should never exceed +150°C
during normal operation.
Thermal Protection
When the junction temperature exceeds T
J
= +160°C,
the MAX15009/MAX15011 shut down to allow the
device to cool. When the junction temperature drops to
+140°C, the thermal sensor turns all enabled blocks on
again, resulting in a cycled output during continuous
thermal-overload conditions. Thermal protection pro-
tects the MAX15009/MAX15011 from excessive power
dissipation. For continuous operation, do not exceed
the absolute maximum junction temperature rating of
+150°C.
P
V
I
SW
SW
=
×
Δ
OUT SW
_
P
(V
V
) (I
I
)
IN
OUT_LDO
OUT_LDO
OUT_SW
LDO
=
+
M
Automotive 300mA LDO Regulators with
Switched Output and Overvoltage Protector
______________________________________________________________________________________
19
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX15011ATJ+ | 功能描述:低壓差穩(wěn)壓器 - LDO Automotive 300mA w/Switched Output 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 |
| MAX15011ATJ+T | 功能描述:低壓差穩(wěn)壓器 - LDO Automotive 300mA w/Switched Output 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 |
| MAX15012AASA+ | 功能描述:功率驅(qū)動器IC 175V/2A High-Speed Half-B MOSFET Drvr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX15012AASA+T | 功能描述:功率驅(qū)動器IC 175V/2A High-Speed Half-B MOSFET Drvr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX15012BASA+ | 功能描述:功率驅(qū)動器IC 175V/2A High-Speed Half-B MOSFET Drvr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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