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參數(shù)資料
| 型號(hào)： | MAX15010 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Automotive 300mA LDO Voltage Regulators with Tracker Output and Overvoltage Protector |
| 中文描述： | 用于汽車電子的300mA LDO穩(wěn)壓器，提供跟蹤輸出和過(guò)壓保護(hù) |
| 文件頁(yè)數(shù)： | 17/23頁(yè) |
| 文件大小： | 479K |
| 代理商： | MAX15010 |
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Setting the Overvoltage Threshold
(MAX15008 Only)
The MAX15008 provides an accurate means to set the
overvoltage threshold for the OVP controller using
FB_PROT. Use a resistive voltage-divider to set the
desired overvoltage threshold (Figure 5). FB_PROT has
a rising 1.235V threshold with a 4% falling hysteresis.
Begin by selecting the total end-to-end resistance,
R
TOTAL
= R
5
+ R
6
. Choose R
TOTAL
to yield a total cur-
rent equivalent to a minimum of 100 x I
FB_PROT
(FB_PROT’s input maximum bias current) at the
desired overvoltage threshold. See the Electrical
Characteristics table.
For example:
With an overvoltage threshold (V
OV
) set to 20V,
R
TOTAL
< 20V / (100 x I
FB_PROT
), where I
FB_PROT
is
FB_PROT’s maximum 100nA bias current:
R
TOTAL
< 2M
Ω
Use the following formula to calculate R
6
:
R
6
= V
TH_PROT
x R
TOTAL
/ V
OV
where V
TH_PROT
is the 1.235V FB_PROT rising thresh-
old and V
OV
is the desired overvoltage threshold. R
6
=
124k
Ω
:
R
TOTAL
= R
5
+ R
6
where R
5
= 1.88M
Ω
. Use a standard 1.87M
Ω
resistor.
A lower value for total resistance dissipates more
power, but provides better accuracy and robustness
against external disturbances.
Input Transients Clamping
When the external MOSFET is turned off during an
overvoltage event, stray inductance in the power path
may cause additional input-voltage spikes that exceed
the V
DSS
rating of the external MOSFET or the absolute
maximum rating for the MAX15008 (IN, TRACK).
Minimize stray inductance in the power path using wide
traces and minimize the loop area included by the
power traces and the return ground path.
For further protection, add a zener diode or transient
voltage suppressor (TVS) rated below the absolute
maximum rating limits (Figure 6).
M
Automotive 300mA LDO Voltage Regulators
with Tracker Output and Overvoltage Protector
______________________________________________________________________________________
17
R6
R5
R5
R6
IN
V
IN
FB_PROT
SGND
GATE
SOURCE
PROTECTOR
OUTPUT
MAX15008
IN
V
IN
FB_PROT
SGND
GATE
SOURCE
PROTECTOR
OUTPUT
MAX15008
Figure 5. Setting the Overvoltage Threshold (MAX15008)
IN
V
IN
SGND
GATE
SOURCE
TVS
MAX15008
LOAD
Figure 6. Protecting the MAX15008 Input from High-Voltage
Transients
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX15010ATJ+ | 功能描述:低壓差穩(wěn)壓器 - LDO Automotive 300mA w/Tracker 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(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 |
| MAX15010ATJ+T | 功能描述:低壓差穩(wěn)壓器 - LDO Automotive 300mA w/Tracker 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(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 |
| 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(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 |
| 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(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 |
| MAX15012AASA+ | 功能描述:功率驅(qū)動(dòng)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(shí)間: 下降時(shí)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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