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MAX1763

更新时间： 2024-09-25 14:58:23
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
18页 654K
描述
1.5A、低噪声、1MHz、升压型DC-DC转换器

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MAX1763 数据手册

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19-1698; Rev 2; 4/11  
1.5A, Low-Noise, 1MHz, Step-Up  
DC-DC Converter  
General Description  
Features  
The MAX1763 is a high-efficiency, low-noise, step-up  
DC-DC converter intended for use in battery-powered  
wireless applications. This device maintains exception-  
ally low quiescent supply current (110µA) despite its  
high 1MHz operating frequency. Small external compo-  
nents and a tiny package make this device an excellent  
choice for small hand-held applications that require the  
longest possible battery life.  
♦ Up to 94% Efficiency  
♦ +0.7V to +5.5V Input Voltage Range  
♦ 1.1V Guaranteed Startup Input Voltage  
♦ Up to 1.5A Output  
♦ Fixed 3.3V Output or Adjustable (2.5V to 5.5V)  
♦ 1MHz PWM Synchronous-Rectified Topology  
♦ 1µA Logic-Controlled Shutdown  
The MAX1763 uses a synchronous-rectified pulse-  
width-modulation (PWM) boost topology to generate  
2.5V to 5.5V outputs from a wide range of input  
sources, such as one to three alkaline or NiCd/NiMH  
cells or a single Lithium-ion (Li+) cell. Maxim's propri-  
etary Idle Mode™ circuitry significantly improves effi-  
ciency at light load currents while smoothly transitioning  
to fixed-frequency PWM operation at higher load cur-  
rents to maintain excellent full-load efficiency. Low-  
noise, forced-PWM mode is available for applications  
that require constant-frequency operation at all load  
currents. The MAX1763 may also be synchronized to  
an external clock to protect sensitive frequency bands  
in communications equipment.  
♦ Analog Gain Block for Linear-Regulator or Low-  
Battery Comparator  
♦ Adjustable Current Limit and Soft-Start  
♦ 1.5W TSSOP Package Available  
Idle Mode is a trademark of Maxim Integrated Products.  
________________________Applications  
Digital Cordless  
Phones  
Hand-Held  
Instruments  
PCS Phones  
Palmtop Computers  
Wireless Handsets  
Personal  
The MAX1763 includes an on-chip linear gain block  
that can be used to build a high-power external linear  
regulator or as a low-battery comparator. Soft-start and  
current limit functions permit optimization of efficiency,  
external component size, and output voltage ripple.  
Communicators  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
16 QSOP  
The MAX1763 is available in a space-saving 16-pin  
QSOP package or a high-power (1.5W) 16-pin TSSOP-  
EP package.  
MAX1763EEE+  
MAX1763EUE+  
16 TSSOP-EP*  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad  
Typical Operating Circuit  
Pin Configuration  
1.5μH  
IN  
0.7V TO 5.5V  
OUT  
3.3V AT 1.5A  
TOP VIEW  
LX  
ONA  
ISET  
REF  
GND  
FB  
1
2
3
4
5
6
7
8
16 ONB  
15 POUT  
14 LX  
POUT  
MAX1763  
OFF  
ON  
ONB  
ONA  
ON  
OFF  
OUT  
MAX1763  
13 POUT  
12 PGND  
11 LX  
PWM  
CLK/SEL  
AIN  
OR NORMAL  
LBI OR GAIN  
BLOCK INPUT  
OUT  
AIN  
AO  
ISET  
REF  
10 PGND  
AO  
LBO OR  
GAIN BLOCK OUTPUT  
9
CLK/SEL  
FB  
GND PGND  
QSOP  
TSSOP-EP  
________________________________________________________________ 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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