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| 型号： | MAX8559EBAJJ+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.85V .3A 8-UCSP |
| 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 |
| 输出电压： | 2.85V |
| 输入电压： | 最高 6.5V |
| 电压 - 压降（标准）： | 0.06V @ 100mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 300mA（最小） |
| 电流 - 限制（最小）： | 310mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFBGA，CSPBGA |
| 供应商设备封装： | 8-UCSP（4x2） |
| 包装： | 带卷 (TR) |
Dual, 300mA, Low-Noise Linear Regulator
with Independent Shutdown in UCSP or TDFN
Load-Transient Considerations
The MAX8559 load-transient response graphs (see the
Typical Operating Characteristics ) show two compo-
nents of the output response: a DC shift in the output
voltage due to the different load currents and the tran-
sient response. Typical overshoot for step changes in
the load current from 10μA to 100mA is 15mV. Increase
the output capacitor’s value and decrease its ESR to
attenuate transient spikes.
Dropout Voltage
A regulator’s minimum input-output voltage differential
(or dropout voltage) determines the lowest usable sup-
ply voltage. In battery-powered systems, this determines
the useful end-of-life battery voltage. Because the
MAX8559 uses an internal P-channel MOSFET pass
transistor, its dropout voltage is a function of the drain-
to-source on-resistance (R DS(ON) ) multiplied by the load
current (see the Typical Operating Characteristics ).
Calculating the Maximum Output Power
in UCSP
The maximum output power of the MAX8559 is limited
by the maximum power dissipation of the package. By
calculating the power dissipation of the package as a
function of the input voltage, output voltages, and out-
put currents, the maximum input voltage can be
obtained. The maximum power dissipation should not
exceed the package’s maximum power rating.
P = (V IN(MAX) - V OUTA ) x I OUTA
+ ( VIN(MAX) - V OUTB ) x I OUTB
where:
V IN(MAX) = maximum input voltage
P MAX = maximum power dissipation of the package
(379mW for the UCSP and 1951mW for the TDFN)
V OUTA = output voltage of OUTA
V OUTB = output voltage of OUTB
I OUTA = maximum output current of OUTA
I OUTB = maximum output current of OUTB
P should be less than P MAX . If P is greater than P MAX ,
consider the TDFN.
Layout Guidelines
Due to the low output noise and tight output voltage
accuracy required by most applications, careful PC
board layout is required. An evaluation kit
(MAX8559EVKIT) is available to speed design.
Follow these guidelines for good PC board layout:
? Keep the input and output paths short and wide if
possible, especially at the ground terminals.
? Use thick copper PC boards (2oz vs. 1oz) to
enhance thermal capabilities.
? Place output, input, and bypass capacitors as close
as possible to the IC.
? Ensure traces to BP and the BP capacitor are away
from noisy sources to ensure low output voltage noise.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8559EBAXY-T | 制造商:Maxim Integrated Products 功能描述:DUAL, 300MA, LOW-NOISE LINEAR REGULATOR WITH - Tape and Reel |
| MAX8559ETA11+ | 制造商:Maxim Integrated Products 功能描述:REG LDO LIN FIX POS 1.85V/1.85V 0.3A/0.3A 8TDFN EP - Rail/Tube |
| MAX8559ETA11+T | 功能描述:低压差稳压器 - LDO Dual 300mA Low-Noise Linear Regulator 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 |
| MAX8559ETA18+ | 制造商:Maxim Integrated Products 功能描述:REG LDO LIN FIX POS 1.85V/1.5V 0.3A/0.3A 8TDFN EP - Rail/Tube |
| MAX8559ETA18+T | 功能描述:低压差稳压器 - LDO Dual 300mA Low-Noise Linear Regulator 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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