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MAX8815, MAX8815A
1A、97%效率、30µA静态电流、升压转换器，具有真关断
效率最高的1A输出boost转换器
概述
完整的数据资料
(PDF, 336kB) 英文
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MAX8815A DC-DC升压转换器是一款高效、低静态电流、具备True Shutdown™和浪涌电流限制的同步升压转换器。MAX8815A可以从2节NiMH/NiCd电池或单节锂离子/锂聚合物电池产生3.3V至5V的输出。
关键特性
应用/使用
效率高达97%，带有内部同步整流器
30µA低静态电流
1.8V输入、VOUT = 5V时保证500mA输出电流
2.5V输入、5V时保证1A输出电流
低噪声固定频率工作模式(FPWM模式)
2MHz PWM开关频率
预设(5V)或可调节输出
采用软启动控制电流，限制了浪涌电流
True Shutdown功能
内部补偿
过载/短路保护
0.1µA关断电流
热关断功能
紧凑的10引脚、3mm x 3mm TDFN封装
蜂窝电话、PDA、MP3播放器 DSC和DVC 微处理器/DSP核供电 PCMCIA卡 便携式手持设备
Key Specifications:
Step-Up Switching Regulators
Part Number
VIN (min) (V)
VIN (max) (V)
Min. VOUT (V)
Max. VOUT (V)
IOUT (A)
Output Adj. Method
Operating Current, ICC (max) (mA)
Number of DC-DC Outputs
Operating Freq. (kHz)
Features
EV-Kit
Package
RoHS Available
Operating Temp. Range (°C)
Price**
MAX8815
NEW!
1.2
5.5
1.265
5.5
1
Resistor
0.03
1
2000
• Fixed Frequency/ PWM Operation
Yes
THIN QFN (Dual)/10
Yes
-40 to +85
$1.14 @ 1k
See All Step-Up Switching Regulators (89)
Key Specifications:
Switch-Mode DC-DC Power Supplies
Part Number
Topology
VIN (min) (V)
VIN (max) (V)
Number of DC-DC Outputs
Digital/VID Programmed Output
Min. Adjustable VOUT (V)
Max. Adjustable VOUT (V)
IOUT (A)
Operating Current, ICC (max) (mA)
Operating Freq. (kHz)
Internal Power Switch(es)
Package
Price**
MAX8815
NEW!
Step-Up
1.2
5.5
1
No
1.265
5.5
1
0.03
2000
Yes
THIN QFN (Dual)/10
$1.14 @ 1k
See All Switch-Mode DC-DC Power Supplies (429)
Notes:
** This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
图表
典型应用电路
参考文献： 19-4092;
Rev. 1;
2008-09-04
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