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MAX8667

更新时间： 2024-11-25 11:14:35
品牌 Logo 应用领域
美信 - MAXIM 转换器
页数 文件大小 规格书
18页 387K
描述
1.5MHz Dual Step-Down DC-DC Converters with Dual LDOs and Individual Enables

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MAX8667 数据手册

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19-0784; Rev 1; 7/07  
1.5MHz Dual Step-Down DC-DC Converters  
with Dual LDOs and Individual Enables  
7/MAX68  
General Description  
Features  
o Tiny, Thin QFN 3mm x 3mm Package  
o Individual Enables  
o Step-Down Converters  
The MAX8667/MAX8668 dual step-down converters  
with dual low-dropout (LDO) linear regulators are  
intended to power low-voltage microprocessors or  
DSPs in portable devices. They feature high efficiency  
with small external component size. The step-down  
converters are adjustable from 0.6V to 3.3V (MAX8668)  
or factory preset (MAX8667) with guaranteed output  
current of 600mA for OUT1 and 1200mA for OUT2. The  
1.5MHz hysteretic-PWM control scheme allows for tiny  
external components and reduces no-load operating  
current to 100µA with all outputs enabled. Dual low-qui-  
escent-current, low-noise LDOs operate down to 1.7V  
supply voltage. The MAX8667/MAX8668 have individ-  
ual enables for each output, maximizing flexibility.  
600mA Guaranteed Output Current on OUT1  
1200mA Guaranteed Output Current on OUT2  
Tiny Size 2.2µH Chip Inductor (0805)  
Output Voltage from 0.6V to 3.3V (MAX8668)  
Ultra-Fast Line and Load Transients  
Low 25µA Supply Current Each  
o LDOs  
300mA Guaranteed  
Low 1.7V Minimum Supply Voltage  
Low Output Noise  
Ordering Information  
The MAX8667/MAX8668 are available in the space-  
saving, 3mm x 3mm, 16-pin thin QFN package.  
PART  
PKG CODE  
T1633-4  
T1633-4  
T1633-4  
T1633-4  
TOP MARK  
AEQ  
MAX8667ETEAA+  
MAX8667ETEAB+  
MAX8667ETEAC+  
MAX8667ETECQ+  
Applications  
AFI  
Cell Phones/Smartphones  
AFM  
PDA and Palmtop Computers  
Portable MP3 and DVD Players  
Digital Cameras, Camcorders  
PCMCIA Cards  
AFN  
Note: All MAX8667/MAX8668 parts are in a 16-pin, thin QFN,  
3mm x 3mm package and operate in the -40°C to +85°C  
extended temperature range.  
+Denotes a lead-free package.  
Handheld Instruments  
Ordering Information continued at the end of data sheet.  
Selector Guide appears at the end of data sheet.  
Pin Configuration  
Typical Operating Circuit  
2.6V TO 5.5V  
TOP VIEW  
10µF  
4.7µF  
IN12 IN34  
12  
11  
10  
9
EN3  
EN1  
EN4  
EN2  
REF  
OUT2 (FB2)  
REF  
300mA  
300mA  
4.7µF  
13  
14  
PGND1  
8
7
6
5
OUT3  
OUT1 (FB1)  
0.01µF  
OUT4  
GND  
MAX8667  
MAX8668  
4.7µF  
GND  
EN1 15  
16  
EN4  
EN2  
MAX8667  
2.2µH  
2.2µH  
1.2A  
600mA  
1
2
3
4
LX2  
LX1  
OUT2  
OUT1  
2.2µF  
2.2µF  
PGND1 PGND2  
THIN QFN  
(3mm x 3mm)  
( ) ARE FOR THE MAX8668  
________________________________________________________________ Maxim Integrated Products  
1
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.  
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 		1.5MHz Dual Step-Down DC-DC Converters with Dual LDOs and Individual Enables
MAX8667ETECQ+ MAXIM

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 		1.5MHz Dual Step-Down DC-DC Converters with Dual LDOs and Individual Enables
MAX8667ETECQ+T MAXIM

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MAX8667ETEHR+ MAXIM

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 		Dual Switching Controller, Voltage-mode, 2A, 1500kHz Switching Freq-Max, BICMOS, 3 X 3 MM,
MAX8667ETEHR+T MAXIM

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 		Dual Switching Controller, Voltage-mode, 2A, 1500kHz Switching Freq-Max, BICMOS, 3 X 3 MM,
MAX8667ETEJS+T MAXIM

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 		Dual Switching Controller, Voltage-mode, 2A, 1500kHz Switching Freq-Max, BICMOS, 3 X 3 MM,
MAX8668 ADI

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 		1.5MHz、双路降压型DC-DC转换器，带有双LDO和独立使能控制

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