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MAX8884Y

更新时间： 2024-11-12 11:14:27
品牌 Logo 应用领域
美信 - MAXIM 转换器
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17页 516K
描述
700mA DC-DC Step-Down Converters with Dual 300mA LDO in 2mm x 2mm CSP

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MAX8884Y 数据手册

 浏览型号MAX8884Y的Datasheet PDF文件第2页浏览型号MAX8884Y的Datasheet PDF文件第3页浏览型号MAX8884Y的Datasheet PDF文件第4页浏览型号MAX8884Y的Datasheet PDF文件第5页浏览型号MAX8884Y的Datasheet PDF文件第6页浏览型号MAX8884Y的Datasheet PDF文件第7页 
19-4418; Rev 1; 1/10  
700mA DC-DC Step-Down Converters  
with Dual 300mA LDO in 2mm x 2mm CSP  
Y/MAX84Z  
General Description  
Features  
o Step-Down Converter  
The MAX8884Y/MAX8884Z step-down converters with  
dual low-dropout (LDO) linear regulators are intended to  
power low-voltage microprocessors, DSPs, camera and  
Wi-Fi modules, or other point of load applications in  
portable devices. These ICs feature high efficiency with  
small external component size. The step-down converter  
output voltage is pin selectable between 1.2V and 1.8V,  
and provides guaranteed output current of 700mA. The  
2/4MHz hysteretic-PWM control scheme allows for tiny  
external components and reduces no-load operating  
current to 50µA. Two low quiescent current, low-noise  
LDOs operate down to 2.7V supply voltage. Two switch-  
ing frequency options are available—MAX8884Y (2MHz)  
and MAX8884Z (4MHz)—allowing optimization for small-  
est solution size or highest efficiency. Fast switching  
allows the use of small ceramic 2.2µF input and output  
capacitors while maintaining low ripple voltage. The  
MAX8884Y/MAX8884Z have individual enables for each  
output, maximizing flexibility.  
Pin-Selectable Output Voltage (1.2V/1.8V)  
2MHz or 4MHz Switching Frequency  
Low-Output Voltage Ripple  
700mA Output Drive Capability  
Simple Logic ON/OFF Control  
Tiny External Components  
o Low-Noise LDOs  
2 x 300mA LDO  
Pin-Selectable Output Voltage (LDO1)  
Low 26µV  
(typ) Output Noise  
RMS  
High 65dB (typ) PSRR  
Simple Logic ON/OFF Control  
o Low 0.1µA Shutdown Current  
o 2.7V to 5.5V Supply Voltage Range  
o Thermal Shutdown  
o Tiny, 2mm x 2mm x 0.65mm CSP Package (4x4 Grid)  
Ordering Information  
The MAX8884Y/MAX8884Z are available in a 16-bump,  
2mm x 2mm CSP package (0.7mm max height).  
SWITCHING  
FREQUENCY  
PART  
PIN-PACKAGE  
Applications  
MAX8884YEREKE+T  
MAX8884ZEREKE+T  
16 CSP  
16 CSP  
2MHz  
4MHz  
Cell Phones/Smartphones  
PDA and Palmtop Computers  
Portable MP3 and DVD Players  
Digital Cameras, Camcorders  
PCMCIA Cards  
Note: All devices are specified over the -40°C to +85°C operat-  
ing temperature range.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
T = Tape and reel.  
Typical Application Circuit appears at end of data sheet.  
Handheld Instruments  
Pin Configuration  
Typical Operating Circuit  
TOP VIEW  
(BUMPS ON BOTTOM)  
BATT  
2.7V TO 5.5V  
BUCK  
1.2V/1.8V  
IN1A  
IN1B  
FB  
LX  
MAX8884Y  
MAX8884Z  
2.2µF  
A1  
REFBP  
B1  
A2  
AGND  
B2  
A3  
NC1  
A4  
PGND  
B4  
2.2µH  
2.2µF  
MAX8884Y  
MAX8884Z  
PGND  
BUCK_EN  
SEL  
BUCK ON/OFF  
B3  
REFBP  
LDO2  
LDO2_EN  
BUCK_EN  
C2  
LX  
C4  
BUCK/LDO1 VOLTAGE  
SELECTION  
AGND  
LDO1  
C1  
C3  
LDO1 ON/OFF  
LDO2 ON/OFF  
LDO1_EN  
LDO2_EN  
V
LDO1  
UP TO 300mA  
IN2  
IN1B  
SEL  
IN1A  
BATT  
2.7V TO 5.5V  
D1  
D2  
D3  
D4  
FB  
V
LDO2  
IN2  
LDO2  
UP TO 300mA  
LDO1  
NC2  
LDO1_EN  
CSP  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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