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| 型号： | MAX8581ETB+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/10页 |
| 文件大小： | 0K |
| 描述： | IC CONV 2.5MHZ CDMA 10-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 功能： | 降频器 |
| 频率： | 2.5MHz，1.5MHz |
| RF 型： | 手机，CDMA |
| 次要属性： | TDFN 内 60 兆欧 旁路 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 1411 (CN2011-ZH PDF) |
| 其它名称： | MAX8581ETB+TDKR |
ATION
AILABL
19-0593; Rev 1; 1/07
KIT
EVALU E
AV
2.5MHz/1.5MHz Step-Down Converters
with 60m ? Bypass in TDFN for CDMA PA Power
General Description
The MAX8581/MAX8582 high-frequency step-down con-
verters are optimized for dynamically powering the power
amplifier (PA) in CDMA handsets. They integrate a high-
efficiency PWM step-down converter for medium- and
low-power transmission and a 60m ? (typ) bypass mode
to power the PA directly from the battery during high-
power transmission. They use an analog input driven by
an external DAC to control the output voltage linearly for
continuous PA power adjustment. The MAX8581/
MAX8582 use an internal feedback network, and the
switching frequency is internally set to 2.5MHz and
1.5MHz, respectively.
Fast switching (up to 2.5MHz) and fast soft-start allow
the use of ceramic 2.2μF input and output capacitors
while maintaining low voltage ripple. The small 1.5μH to
3.3μH inductor size can be optimized for efficiency.
The MAX8581/MAX8582 are available in 10-pin, 3mm x
3mm TDFN packages (0.8mm max height).
Applications
Features
? 600mA Step-Down Converter
? 60m ? (typ) Bypass Mode with Integrated FET
? Dynamically Adjustable Output from 0.4V to V IN
? 2.5MHz and 1.5MHz Switching Frequency
? Small LC Components: 1.5μH to 3.3μH and 2.2μF
? Up to 94% Efficiency
? Low Output Ripple at All Loads
? 2.7V to 5.5V Input
? 0.1μA Shutdown Mode
? Output Short-Circuit Protection
? Thermal Shutdown
? 10-Pin, 3mm x 3mm TDFN Packag es
Ordering Information
WCDMA/NCDMA Cell Phones
Wireless PDAs, Smartphones
PART*
MAX8581 ETB+
MAX8582 ETB+
PIN-
PACKAGE
10 TDFN-EP**
10 TDFN-EP**
TOP
MARK
ACT
ACU
PKG
CODE
T1033-1
T1033-1
* All devices are specified in the -40°C to +85°C extended
temperature range.
** EP = Exposed pad.
+ Denotes a lead-free package.
Typical Operating Circuit
Pin Configuration
INPUT
Li+ BATTERY
IN
OUT
OUTPUT
0.4V TO V BATT
TOP VIEW
2.2 μ F
GND
MAX8581
MAX8582
LX
1.5 μ H OR 3.3 μ H
2.2 μ F
10
9
8
MAX8581/
7
6
MAX8582
ON/OFF
SHDN
ANALOG
CONTROL
REFIN
HP
FORCED BYPASS
+
1
2
3
4
5
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8582ETB+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX8582ETB+T | 功能描述:直流/直流开关转换器 2.5/1.5MHz Step-Down 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 |
| MAX8582EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX8582 EVAL KIT - Rail/Tube |
| MAX8585EUA | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX8585EUA+ | 功能描述:功率驱动器IC ORing MOSFET Controller RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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