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参数资料
| 型号： | MAX16920BATJ/V+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/20页 |
| 文件大小： | 0K |
| 描述： | IC PMIC MULT-OUTPUT AUTO 32TQFN |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 43 |
| 应用： | 车载系统 |
| 电流 - 电源： | 2mA |
| 电源电压： | 5.5 V ~ 18 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-WFQFN 裸露焊盘 |
| 供应商设备封装： | 56-TQFN-EP（7x7） |
| 包装： | 托盘 |
Automotive Power-Management IC with
Three Step-Down Converters and Linear Regulator
5) Route high-speed switching nodes (BST_ and LX_)
away from sensitive analog areas (SYNC and FB_)
and keep their area as small as possible.
6) Place the V INA , V INB , and V L bypass capacitors as
close as possible to the device. If using multiple
bypass capacitors, place the lowest value capacitor
closest to the pin. The ground connection of the V L
bypass capacitor should be connected directly to the
GND pin with a wide trace.
7) Keep any feedback traces as short and small as
possible to prevent noise pickup. Make feedback
connections directly to the positive terminal of the
output capacitor to ensure good regulation.
Thermal Considerations
The power dissipation of the MAX16920 is made up of
three components: power dissipation due to the DC-DC
converters, power dissipation due to the linear regulator,
and internal power dissipation. The DC-DC converter
power dissipation can be estimated as follows:
P DCDC = P RESISTIVE + P SWITCHING
P RESISTIVE = D x I OUT2 x R H + (1 - D) x I OUT2 x
R L
where D is the duty cycle (approximately V OUT /V IN ),
I OUT is the output current, R H is the resistance of
the high-side switch, and R L is the resistance of the
low-side switch.
P SWITCHING = f SW x (0.25 x V IN x I OUT x t RISE + 0.25 x
V IN x I OUT x t FALL )
where V IN is the input voltage, t RISE is the rise time of
the LX node (approximately 5ms (MAX16920B) and
10ms (MAX16920A)), and t FALL is the fall time of the
LX node (approximately 5ms (MAX16920B) and 10ms
(MAX16920A)).
The linear regulator power dissipation is:
P LIN = (V IN - 5V) x I LIN
The internal power dissipation can be approximately
calculated as V IN_ x 35mA during normal operation. In
many applications, the power dissipation of the linear
regulator (LDOA) is a large contributor to the overall
power dissipation. Note that although the linear regula-
tor can provide up to 150mA of output current, in most
cases the permitted output current is lower due to power
dissipation limitations.
The total power dissipation leads to an increase in the
chip temperature, which is dependent on the thermal
resistance of the board upon which the MAX16920 is
mounted. The maximum permitted junction temperature
is +150°C and a junction temperature above this eventu-
ally leads to overtemperature shutdown of the chip.
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16920BEVKIT+ | 功能描述:电源管理IC开发工具 Multiple-Output Power Supply 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 |
| MAX16922ATPA/V+ | 功能描述:直流/直流开关转换器 2.2MHz Dual Step-Dwn DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX16922ATPA/V+T | 功能描述:直流/直流开关转换器 2.2MHz Dual Step-Dwn DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX16922ATPB/V+ | 功能描述:直流/直流开关转换器 2.2MHz Dual Step-Dwn DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX16922ATPB/V+T | 功能描述:直流/直流开关转换器 2.2MHz Dual Step-Dwn DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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