参数资料
| 型号： | MAX8506ETE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC DC-DC CONV PWM 16-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 应用： | 转换器，WCDMA |
| 输入电压： | 2.6 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 0.4 V ~ 3.4 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（4x4） |
| 包装： | 管件 |
PWM Step-Down DC-DC Converters with 75m ?
Bypass FET for WCDMA and cdmaOne Handsets
Table 1. Suggested Inductors
SUPPLIER
Murata
Sumida
Taiyo Yuden
TOKO
PART
NUMBER
LQH32C-53
CDRH2D11
LBLQ2016
D312C
INDUCTANCE
(μH)
4.7
4.7
4.7
4.7
ESR (m ? )
150
135
250
200
SATURATION
CURRENT (A)
0.650
0.500
0.210
0.790
DIMENSIONS (mm)
2.5 x 3.2 x 1.7
3.2 x 3.2 x 1.2
1.6 x 2.0 x 1.6
3.6 x 3.6 x 1.2
capacitor ripple. This sets the device speed for transient
response and allows the use of small ceramic output
capacitors because the phase-shifted capacitor ripple
PC Board Layout and Routing
Table 2. Component Suppliers
does not disturb the current-regulation loop. The resistor
sets the proportional gain of the output error voltage by
a factor of g m x R C . Increasing this resistor also increas-
es the sensitivity of the control loop to output ripple.
The resistor and capacitor set a compensation zero that
defines the system’s transient response. The load cre-
SUPPLIER
Murata
Sumida
Taiyo Yuden
TOKO
PHONE
770-436-1300
847-956-0666
408-573-4150
847-297-0070
WEBSITE
www.murata.com
www.sumida.com
www.t-yuden.com
www.tokoam.com
ates a dynamic pole, shifting in frequency with changes
in load. As the load decreases, the pole frequency
shifts to the left. System stability requires that the com-
pensation zero must be placed to ensure adequate
phase margin (at least 30° at unity gain). With a 4.7μF
output capacitor, the recommended C C and R C for the
MAX8506 are 1500pF and 10k ? , respectively. This pro-
vides adequate phase margin over the entire output
voltage and load range and optimizes the output-
voltage settling time for REFIN dynamic control. See the
Typical Application Circuits for recommended C C and
R C values for the MAX8507 and MAX8508.
Inductor Selection
A 4μH to 6μH inductor is recommended for most appli-
cations. For best efficiency, the inductor’s DC resistance
should be <400m ? . Saturation current (I SAT ) should be
greater than the maximum DC load at the PA’s supply
plus half the inductor current ripple. Two-step V CC
applications typically require very small inductors with
I SAT in the 200mA to 300mA region. See Tables 1 and 2
for recommended inductors and suppliers.
High switching frequencies and large peak currents
make PC board layout a very important part of design.
Good design minimizes EMI, noise on the feedback
paths, and voltage gradients in the ground plane, all of
which can result in instability or regulation errors.
Connect the inductor, input filter capacitor, and output fil-
ter capacitor as close together as possible and keep their
traces short, direct, and wide. The external voltage- feed-
back network should be very close to the FB pin, within
0.2in (5mm). Keep noisy traces, such as those from the
LX pin, away from the voltage-feedback network. Position
the bypass capacitors as close as possible to their
respective supply and ground pins to minimize noise cou-
pling. For optimum performance, place input and output
capacitors as close to the device as possible. Connect
GND directly under the IC to the exposed paddle. Refer
to the MAX8506 evaluation kit for an example PC board
layout and routing scheme.
_______________________________________________________________________________________
9
相关PDF资料 |
PDF描述 |
|---|---|
| MAX15059AETE+T | IC REG CONV APD APPS 16WQFP |
| ACB06DHNT | CONN EDGECARD 12POS .050 DIP SLD |
| SIP21107DR-30-E3 | IC REG LDO 3V .15A SC70-5 |
| ABB06DHNT | CONN EDGECARD 12POS .050 DIP SLD |
| SIP21107DR-28-E3 | IC REG LDO 2.8V .15A SC70-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8506ETE+ | 功能描述:直流/直流开关转换器 DC/DC Converter DC/DC 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 |
| MAX8506ETE+T | 功能描述:直流/直流开关转换器 DC/DC Converter DC/DC 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 |
| MAX8506ETE-T | 功能描述:直流/直流开关转换器 DC/DC Converter DC/DC 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 |
| MAX8506EVKIT | 功能描述:电源管理IC开发工具 MAX8506/7/8 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 |
| MAX8507ETE | 功能描述:直流/直流开关转换器 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 |
发布紧急采购，3分钟左右您将得到回复。