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参数资料
| 型号： | MAX15011ATJ+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/24页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V/ADJ .3A 32TQFN |
| 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）： | 0.8V @ 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 Regulators with
Switched Output and Overvoltage Protector
Leave CT open to select a typical reset timeout of 19μs.
To maintain reset accuracy, use a low-leakage type of
DC load current at OUT_SW, I OUT_SW_NOM and select
the C OC_DELAY using the following relationship:
capacitor.
Setting the Switch Current Limit
The switch block features accurate current-limit sens-
C OC_DELAY ≥
I OC_DELAY_UP × V OUT_LDO × C OUT_SW
V OC_DELAY × (I SW_LIM ? I OUT_SW_NOM )
ing circuitry. A resistor connected from ILIM to SGND
can be used to select the current-limit threshold using
the following relationship:
I SW_LIM (mA) = R ILIM (k Ω ) x 1mA / k Ω
where 20k Ω ≤ R ILIM ≤ 200k Ω .
Connect ILIM to OUT_LDO to select the default current
limit of 200mA (typ).
Programming the Switch
Overcurrent Blanking Time
The switch provides an adjustable overcurrent blanking
time to allow the safe charge of large capacitive loads.
When an overcurrent event is detected, a delay period
elapses before the condition is latched and the internal
MOSFET is turned off. This period is the overcurrent
delay, t OC_DELAY . Set the overcurrent delay using the
following equation:
t OC_DELAY = C OC_DELAY x V OC_DELAY / I OC_DELAY_UP
where t OC_DELAY is in seconds and C OC_DELAY is in
μF. V OC_DELAY is the overcurrent delay timeout thresh-
old voltage in volts and I OC_DELAY_UP is the overcur-
rent delay timeout pullup current in μA as seen in the
Electrical Characteristics table.
Ensure that the switch is not disabled due to a large
startup inrush current by selecting a large enough
value for overcurrent blanking time. Assume that the
current available for charging the total switch output
capacitance, C OUT_SW , is the difference between the
current-limit threshold value, I SW_LIM , and the nominal
C OC_DELAY also affects the length of time before the
MAX15009/MAX15011 attempt to turn the switch back
on. Set the autoretry delay using the following equation:
t OC_RETRY = C OC_DELAY x
V OC_DELAY /I OC_DELAY_DOWN
where t OC_RETRY is in seconds, C OC_DELAY is in μF,
V OC_DELAY is in volts, and I OC_DELAY_DOWN is in μA.
C OC_DELAY should be a low-leakage type of capacitor
with a minimum value of 100pF.
Setting the Overvoltage Threshold
(MAX15009 Only)
The MAX15009 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 4). 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 3 + R 4 . Choose R TOTAL to yield a total current
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
V IN
R5
IN
MAX15009
GATE
PROTECTOR
OUTPUT
V IN
IN
MAX15009
GATE
PROTECTOR
OUTPUT
R6
FB_PROT
SOURCE
SOURCE
FB_PROT
R3
SGND
Figure 4. Setting the Overvoltage Threshold (MAX15009)
SGND
R4
16
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| MAX15012AASA+ | 功能描述:功率驱动器IC 175V/2A High-Speed Half-B MOSFET Drvr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX15012AASA+T | 功能描述:功率驱动器IC 175V/2A High-Speed Half-B MOSFET Drvr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX15012BASA+ | 功能描述:功率驱动器IC 175V/2A High-Speed Half-B MOSFET Drvr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX15012BASA+T | 功能描述:功率驱动器IC 175V/2A High-Speed Half-B MOSFET Drvr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX15012CASA+ | 功能描述:功率驱动器IC 175V/2A High-Speed Half-B MOSFET Drvr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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