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参数资料
| 型号： | MAX15059EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/16页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX15059 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | * |
76V, 300mW Boost Converter and Current
Monitor for APD Bias Applications
Diode Selection
The MAX15059’s high switching frequency demands a
high-speed rectifier. Schottky diodes are recommended
for most applications because of their fast recovery time
and low forward-voltage drop. Ensure that the diode’s
V IN = 2.8V
TO 5.5V
L1
C IN
peak current rating is greater than the peak inductor cur-
rent. Also, the diode breakdown voltage must be greater
than V OUT .
Output Filter Capacitor Selection
For most applications, use a small output capacitor of
0.1 F F or greater. To achieve low output ripple, a capaci-
tor with low ESR, low ESL, and high capacitance value
should be selected. If tantalum or electrolytic capacitors
are used to achieve high capacitance values, always
C IN
CNTRL
SHDN
IN
MAX15059
LX
FB
D1
R 2
R 1
R F
C OUT
V OUT
C F
add a smaller ceramic capacitor in parallel to bypass the
high-frequency components of the diode current. The
higher ESR and ESL of electrolytic capacitors increase
the output ripple and peak-to-peak transient voltage.
Assuming the contribution from the ESR and capacitor
discharge equals 50% (proportions may vary), calculate
PGND
SGND
BIAS
the output capacitance and ESR required for a specified
ripple using the following equations:
Figure 2. Typical Operating Circuit with RC Filter
I OUT
0.5 x ? V OUT ? ?
I LPEAK xL OPTIMUM ?
? V
(V OUT IN_MIN ) ? ?
C OUT [ μ F] =
?
? t S ?
?
Input-Capacitor Selection
Bypass IN to PGND with a 1 F F (min) ceramic capacitor.
Depending on the supply source impedance, higher val-
ESR [ m W ] =
0.5 x ? V OUT
I OUT
ues may be needed. Make sure that the input capacitors
are close enough to the IC to provide adequate decou-
pling at IN as well. If the layout cannot achieve this,
For very-low-output-ripple applications, the output of the
boost converter can be followed by an RC filter to further
reduce the ripple. Figure 2 shows a 100 I , 0.1 F F (RF
CF) filter used to reduce the switching output ripple to
1mV P-P with a 0.1mA load or 1mV P-P with a 4mA load.
The output voltage regulation resistive divider must
remain connected to the diode/output capacitor node.
add another 0.1 F F ceramic capacitor between IN and
PGND in the immediate vicinity of the IC. Bulk aluminum
electrolytic capacitors may be needed to avoid chatter-
ing at low-input voltage. In case of aluminum electrolytic
capacitors, calculate the capacitor value and ESR of the
input capacitor using the following equations:
V OUT x I OUT
η x V IN_MIN x 0.5 x ? V IN ? ?
I LPEAK x L OPTIMUM x V OUT ?
? V
V IN_MIN OUT IN_MIN ) ? ?
?
Use X7R ceramic capacitors for more stability over the
full temperature range.
C IN [ μ F] =
?
? t S ?
(V
ESR [ m W ] =
0.5 x ? V IN x η x V IN_MIN
V OUT xI OUT
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15059EVKIT+ | 功能描述:电源管理IC开发工具 MAX15059 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 |
| MAX15061ATE+ | 功能描述:直流/直流开关转换器 80V 300mW Boost 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 |
| MAX15061ATE+T | 功能描述:直流/直流开关转换器 80V 300mW Boost 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 |
| MAX15062AATA+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX15062AATA+T | 功能描述:直流/直流开关调节器 36V 300mA Synchronous RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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