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MAX1760 PDF预览

MAX1760

更新时间: 2023-12-20 18:44:17
品牌 Logo 应用领域
亚德诺 - ADI DC-DC转换器
页数 文件大小 规格书
14页 518K
描述
0.8A、低噪声、1MHz、升压型DC-DC转换器

MAX1760 数据手册

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19-1660; Rev 3; 1/07  
0.8A, Low-Noise, 1MHz,  
Step-Up DC-DC Converter  
General Description  
Features  
Up to 94% Efficiency  
The MAX1760/MAX1760H are high-efficiency, low-noise,  
step-up DC-DC converters intended for use in battery-  
powered wireless applications. They combine low quies-  
cent supply current (100µA) with a high 1MHz operating  
frequency. Small external components and tiny 10-pin  
TDFN and µMAX® packages make this device an excel-  
lent choice for small hand-held applications. The  
MAX1760 is activated by a logic-low ON signal while the  
MAX1760H is activated by a logic-high ON input.  
0.7V to 5.5V Input Range  
Up to 800mA Output  
Fixed 3.3V Output (or Adjustable from 2.5V to 5.5V)  
PWM Synchronous-Rectified Topology  
Low-Noise, Constant-Frequency Operation (1MHz)  
0.1µA Logic-Controlled Shutdown  
Synchronizable Switching Frequency  
Adjustable Current Limit  
Both devices use a synchronous-rectified pulse-width-  
modulation (PWM) boost topology to generate 2.5V to  
5.5V outputs from a wide range of inputs, such as 1 to 3  
alkaline or NiCd/NiMH cells or a single lithium-ion (Li+)  
cell. Proprietary Idle-Mode™ circuitry significantly  
improves light-load efficiency and smoothly transitions to  
fixed-frequency PWM operation at higher load currents.  
Adjustable Soft-Start  
10-Pin µMAX Package  
10-Pin 3mm x 3mm TDFN Package  
Low-noise, forced-PWM mode is available for applica-  
tions requiring constant-frequency operation at all load  
currents. PWM operation can also be synchronized to  
an external clock to protect sensitive frequency bands  
in communications equipment. Analog soft-start and  
adjustable current limit permit optimization of efficiency,  
external component size, and output voltage ripple.  
Ordering Information  
PIN-  
ON  
LOGIC  
PART  
PKG CODE  
PACKAGE  
T1033-1  
U10-2  
MAX1760ETB  
MAX1760EUB  
MAX1760HETB  
MAX1760HEUB  
10 TDFN-EP*  
10 µMAX  
Low  
Low  
High  
High  
T1033-1  
U10-2  
10 TDFN-EP*  
10 µMAX  
Applications  
Digital Cordless Phones  
Wireless Handsets  
Palmtop Computers  
Two-Way Pagers  
PCS Phones  
*EP = Exposed paddle.  
Handheld Instruments  
Personal Communicators  
Note: All devices are specified over the -40°C to +85°C operating  
temperature range.  
Pin Configurations  
Typical Operating Circuit  
INPUT = 0.7V  
TO V  
TOP VIEW  
OUT  
MAX1760  
ISET  
REF  
GND  
FB  
1
2
3
4
5
10 ON (ON)  
ISET  
REF  
GND  
FB  
1
2
3
4
5
10 ON (ON)  
ON  
LX  
9
8
7
6
POUT  
LX  
9
8
7
6
POUT  
LX  
V
= 3.3V,  
OUT  
CLK/SEL  
POUT  
MAX1760  
MAX1760H  
MAX1760  
MAX1760H  
800mA  
PGND  
CLK/SEL  
PGND  
CLK/SEL  
ISET  
REF  
FB  
OUT  
OUT  
OUT  
µMAX  
TDFN  
(3mm x 3mm)  
GND PGND  
(ON) FOR MAX1760H  
µMAX is a registered trademark of Maxim Integrated Products, Inc.  
Idle Mode is a trademark of Maxim Integrated Products, Inc.  
________________________________________________________________ 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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