- 您现在的位置：买卖IC网 > PDF目录1852 > MCP1624T-I/MC (Microchip Technology)IC BOOST SYNC REG PWM/PFM 8DFN PDF资料下载
参数资料
| 型号： | MCP1624T-I/MC |
| 厂商： | Microchip Technology |
| 文件页数： | 13/28页 |
| 文件大小： | 0K |
| 描述： | IC BOOST SYNC REG PWM/PFM 8DFN |
| 标准包装： | 3,300 |
| 应用： | 转换器，PIC? 微控制器 |
| 输入电压： | 0.8 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 2 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN（2x3） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
MCP1623/24
5.0
APPLICATION INFORMATION
5.3
Input Capacitor Selection
5.1
Typical Applications
The boost input current is smoothed by the boost
inductor reducing the amount of filtering necessary at
The MCP1623/24 synchronous boost regulator
operates over a wide input voltage and output voltage
range. The power efficiency is high for several decades
of load range. Output current capability increases with
input voltage and decreases with increasing output
voltage. The maximum output current is based on the
N-Channel peak current limit. Typical characterization
curves in this data sheet are presented to display the
typical output current capability.
the input. Some capacitance is recommended to
provide decoupling from the source. Low ESR X5R or
X7R are well suited since they have a low temperature
coefficient and small size. For most applications,
4.7 μF of capacitance is sufficient at the input. For high
power applications that have high source impedance or
long leads, connecting the battery to the input 10 μF of
capacitance is recommended. Additional input
capacitance can be added to provide a stable input
voltage.
5.2
Adjustable Output Voltage
Calculations
input capacitor value.
To calculate the resistor divider values for the
MCP1623/24, the following equation can be used.
5.4
Output Capacitor Selection
R TOP = R BOT × ? ------------- – 1 ?
? V FB
I OUT = C OUT × ? ? ? ?
Where R TOP is connected to V OUT , R BOT is connected
to GND and both are connected to the FB input pin.
EQUATION 5-1:
V OUT
?
Example A:
V OUT = 3.3V
V FB = 1.21V
R BOT = 309 k Ω
R TOP = 533.7 k Ω (Standard Value = 536 k Ω )
Example B:
V OUT = 5.0V
V FB = 1.21V
R BOT = 309 k Ω
R TOP = 967.9 k Ω (Standard Value = 976 k Ω )
There are some potential issues with higher value
resistors. For small surface mount resistors,
environment contamination can create leakage paths
that significantly change the resistor divider that effect
the output voltage. The FB input leakage current can
also impact the divider and change the output voltage
The output capacitor helps provide a stable output
voltage during sudden load transients and reduces the
output voltage ripple. As with the input capacitor, X5R
and X7R ceramic capacitors are well suited for this
application.
The MCP1623/24 is internally compensated so output
capacitance range is limited. See Table 5-1 for the
recommended output capacitor range.
While the N-Channel switch is on, the output current is
supplied by the output capacitor C OUT . The amount of
output capacitance and equivalent series resistance
will have a significant effect on the output ripple
voltage. While C OUT provides load current, a voltage
drop also appears across its internal ESR that results
in ripple voltage.
EQUATION 5-2:
dV
-------
dt
Where dV represents the ripple voltage and dt
represents the ON time of the N-Channel switch (D * 1/
F SW ).
input and output capacitor value.
tolerance.
TABLE 5-1:
CAPACITOR VALUE RANGE
C IN
C OUT
? 2011 Microchip Technology Inc.
Min
Max
4.7 μF
none
10 μF
100 μF
DS41420C-page 13
相关PDF资料 |
PDF描述 |
|---|---|
| MCP1630-E/MS | IC REG CTRLR BST FLYBK ISO 8MSOP |
| MCP16301T-I/CHY | IC REG BUCK ADJ 0.6A SOT23-6 |
| MCP1631-E/ST | IC REG CTRLR ISO PWM CM 20-TSSOP |
| MCP1631HVT-500E/ST | IC REG CTRLR ISO PWM CM 20-TSSOP |
| MCP1631VHVT-330E/ST | IC REG CTRLR ISO PWM VM 20-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP16251 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low Quiescent Current, PFM/PWM Synchronous Boost Regulator |
| MCP16251T-I/CH | 功能描述:直流/直流开关调节器 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 |
| MCP16251T-I/MNY | 功能描述:直流/直流开关调节器 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 |
| MCP16252 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low Quiescent Current, PFM/PWM Synchronous Boost Regulator |
| MCP16252T-I/CH | 功能描述:直流/直流开关调节器 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 |
发布紧急采购，3分钟左右您将得到回复。