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| 型号： | MAX15008ATJ+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 17/24页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V/ADJ .3A 32TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 5V，1.8 V ~ 11 V |
| 输入电压： | 5 V ~ 40 V |
| 电压 - 压降（标准）： | 0.775V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA（最小） |
| 电流 - 限制（最小）： | 330mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
Automotive 300mA LDO Voltage Regulators
with Tracker Output and Overvoltage Protector
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 :
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).
V IN
IN
MAX15008
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.
TVS
SGND
GATE
SOURCE
LOAD
A lower value for total resistance dissipates more
power, but provides better accuracy and robustness
against external disturbances.
Figure 6. Protecting the MAX15008 Input from High-Voltage
Transients
V IN
IN
GATE
V IN
IN
GATE
R5
MAX15008
FB_PROT
SOURCE
PROTECTOR
OUTPUT
MAX15008
SOURCE
PROTECTOR
OUTPUT
R5
R6
FB_PROT
SGND
Figure 5. Setting the Overvoltage Threshold (MAX15008)
SGND
R6
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相关代理商/技术参数 |
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|---|---|
| MAX15008EVKIT+ | 功能描述:电源管理IC开发工具 MAX15008 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX15009ATJ+ | 功能描述:低压差稳压器 - LDO Automotive 300mA w/Switched Output RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX15009ATJ+T | 功能描述:低压差稳压器 - LDO Automotive 300mA w/Switched Output RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX15009ATN+ | 功能描述:低压差稳压器 - LDO Automotive 300mA w/Switched Output RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX15009ATN+T | 功能描述:低压差稳压器 - LDO Automotive 300mA w/Switched Output RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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