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参数资料
| 型号： | MAX15032EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/10页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX15032 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步升 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 30V |
| 电流 - 输出： | 20mA |
| 输入电压： | 2.9 ~ 5.5 V |
| 稳压器拓扑结构： | 升压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX15032 |
500kHz, 36V Output, 600mW PWM
Step-Up DC-DC Converter
? × L ?
I OUT
? T S ? LPEAK OPTIMUM ?
C OUT [ μ F ] =
( V O U T ? V IN _ MIN ) ? ?
? ?
0 . 5 × Δ V OUT
× L OPTIMUM OUT
× I ? × V ?
V OUT OUT
? T S ? LPEA K
C IN [ μ F ] =
?
? ?
? ?
0 . 5 × Δ V IN × η × Δ V IN _ MIN
ESR [ m Ω ] =
discharge equals 50% (proportions could vary), calcu-
late the output capacitance and ESR required for a spec-
ified ripple using the following equations:
I
0 . 5 × Δ V OUT
ESR [ m Ω ] =
I OUT
For very low output-ripple applications, the output of the
boost converter can be followed by an RC filter to fur-
ther reduce the ripple. Figure 1 shows a 10 Ω , 2.2μF fil-
ter used to reduce the switching output ripple to
1mV P-P with a 20mA output and a ripple voltage of
400μV P-P with a 2mA load. The output voltage regula-
tion resistive divider must remain connected to the
diode/output capacitor node.
X7R ceramic capacitors are stable over -40°C to
+125°C temperature range. Where the automotive tem-
perature range is required, use X7R ceramic capaci-
tors. X5R dielectric can be used for -40°C to +85°C
applications.
Input Capacitor Selection
Bypass IN (the input voltage pin) to PGND with a mini-
mum 4.7μF ceramic capacitor. Depending on the sup-
ply source impedance, higher values might be needed.
Make sure that the input capacitor is close enough to
the IC to provide adequate decoupling at IN as well. If
the layout cannot achieve this, add another 0.1μF
ceramic capacitor between IN and PGND in the imme-
L1
4.7 μ H
diate vicinity of the IC. Bulk aluminum electrolytic
capacitors might be needed to avoid chattering at low
input voltages. In the case of aluminum electrolytic
capacitors, calculate the capacitor value and ESR of
the input capacitor using the following equations:
I
η × V IN _ MIN × 0 . 5 × Δ V IN V IN _ MIN ( V OUT ? V IN _ MIN )
V OUT × I OUT
Applications Information
Layout Considerations
Careful PCB layout is critical to achieve clean and sta-
ble operation. Protect sensitive analog grounds by
using a star ground configuration. Connect GND and
PGND together close to the device at the return terminal
of the output bypass capacitor. Do not connect them
together anywhere else. Keep all PCB traces as short
as possible to reduce stray capacitance, trace resis-
tance, and radiated noise. Ensure that the feedback
connection to FB is short and direct. Route high-speed
switching nodes away from the sensitive analog areas.
Avoid any coupling from LX to FB node by keeping the
FB node away from the LX routing. In addition, decou-
pling LX and FB with a small 22pF capacitor from FB to
GND can be used. Use an internal PCB layer for GND
as an EMI shield to keep radiated noise away from the
device, feedback dividers, and bypass capacitors.
V IN = 2.9V TO 5.5V
IN
SHDN
LX
D1
1A/40V
R1
R F
10 Ω
V OUT
30V
143k Ω
C IN
10 μ F
MAX15032
PGND
GND
FB
CP
CN
C CP
10nF
R2
6.2k Ω
C OUT
2.2 μ F
C F
2.2 μ F
Figure 1. Typical Operating Circuit with RC Filter
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15032EVKIT+ | 功能描述:电源管理IC开发工具 MAX15032 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 |
| MAX15033AAUI+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX15033ATE+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX15033BAUI+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX15034AAUI+ | 功能描述:DC/DC 开关控制器 Configurable Synchronous Buck RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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