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| 型号： | MCP1602-120I/MF |
| 厂商： | Microchip Technology |
| 文件页数： | 15/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1.2V 0.5A 8DFN |
| 标准包装： | 120 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.2V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 产品目录页面： | 668 (CN2011-ZH PDF) |
MCP1602
capacitor value.
TABLE 5-2:
MCP1602 RECOMMENDED
INDUCTORS (CONTINUED)
TABLE 5-1:
CAPACITOR VALUE RANGE
C IN C OUT
Part
Number
Value
(μH)
DCR
Ω
(max)
I SAT
(A)
Size
WxLxH (mm)
Minimum
Maximum
4.7 μF
—
4.7 μF
22 μF
Wurth Elektronik?
WE-TPC 3.6
0.085
1.10
3.8x3.8x1.65
5.6
Inductor Selection
Type S
WE-TPC
4.7
0.105
0.90
3.8x3.8x1.65
For most applications an inductor value of 4.7 μH is
Type S
recommended to achieve a good balance between
converter load transient response and minimized
noise. There are many different magnetic core
materials and package options to select from. That
decision is based on size, cost, and acceptable
radiated energy levels. Toroid and shielded ferrite pot
WE-TPC
Type S
WE-TPC
Type M
WE-TPC
6.8
3.3
4.7
0.156
0.065
0.082
0.75
1.80
1.65
3.8x3.8x1.65
4.8x4.8x1.8
4.8x4.8x1.8
cores will have low radiated energy, but tend to be
Type M
larger and higher in cost.
WE-TPC
6.8
0.100
1.25
4.8x4.8x1.8
The value of inductance is selected to achieve a
Type M
desired amount of ripple current. It is reasonable to
assume a ripple current that is 20% of the maximum
5.7
Thermal Calculations
Δ I L = ------------------- × ? 1 – ------------- ?
F SW × L
? ?
load current. The larger the amount of ripple current
allowed, the larger the output capacitor value becomes
to meet ripple voltage specifications. The inductor
ripple current can be calculated according to
EQUATION 5-4:
V OUT V OUT
V IN
Where:
The MCP1602 is available in two different packages
(MSOP and 3x3 DFN). By calculating the power
dissipation and applying the package thermal
resistance, ( θ JA ), the junction temperature is
estimated. The maximum continuous junction
temperature rating for the MCP1602 is +125 o C.
To quickly estimate the internal power dissipation for
the switching buck regulator, an empirical calculation
using measured efficiency can be used. Given the
measured efficiency, the internal power dissipation is
estimated by:
F SW
=
Switching Frequency
EQUATION 5-5:
? ------------------------------ ? – ( V
When considering inductor ratings, the maximum DC
current rating of the inductor should be at least equal to
the maximum load current, plus one half the peak-to-
? Efficiency ?
OUT × I OUT ) = P Dis
peak inductor ripple current (1/2 * Δ I L ). The inductor DC
resistance adds to the total converter power loss. An
inductor with a low DC resistance allows for higher
converter efficiency.
The difference between the first term, input power
dissipation, and the second term, power delivered, is
the internal power dissipation. This is an estimate
assuming that most of the power lost is internal to the
TABLE 5-2:
MCP1602 RECOMMENDED
INDUCTORS
MCP1602. There is some percentage of power lost in
the buck inductor, with very little loss in the input and
output capacitors.
Part
Number
Value
(μH)
DCR
Ω
(max)
I SAT
(A)
Size
WxLxH (mm)
Coiltronics?
SD10
SD10
SD10
SD12
SD12
SD12
3.3
4.7
6.2
3.3
4.7
6.2
0.108
0.154
0.218
0.104
0.118
0.170
1.31
1.08
0.92
1.42
1.29
1.08
5.2x5.2x1.0
5.2x5.2x1.0
5.2x5.2x1.0
5.2x5.2x1.2
5.2x5.2x1.2
5.2x5.2x1.2
? 2007 Microchip Technology Inc.
DS22061A-page 15
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相关代理商/技术参数 |
参数描述 |
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| MCP1602-150I/MF | 功能描述:开关变换器、稳压器与控制器 20MHz 05A Synch-Buck PFM/PWM Reg RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MCP1602-150I/MS | 功能描述:开关变换器、稳压器与控制器 20MHz 05A Synch-Buck PFM/PWM Reg RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MCP1602-180I/MF | 功能描述:开关变换器、稳压器与控制器 20MHz 05A Synch-Buck PFM/PWM Reg RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MCP1602-180I/MS | 功能描述:开关变换器、稳压器与控制器 20MHz 05A Synch-Buck PFM/PWM Reg RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MCP1602-250I/MF | 功能描述:开关变换器、稳压器与控制器 20MHz 05A Synch-Buck PFM/PWM Reg RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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