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MAX1724EVKIT

更新时间： 2024-09-17 23:45:51
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美信 - MAXIM /
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4页 314K
描述
Evaluation Kit for the MAX1722/MAX1723/MAX1724

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MAX1724EVKIT 数据手册

 浏览型号MAX1724EVKIT的Datasheet PDF文件第2页浏览型号MAX1724EVKIT的Datasheet PDF文件第3页浏览型号MAX1724EVKIT的Datasheet PDF文件第4页 
19-2076; Rev 0; 7/01  
MAX1724 Evaluation Kit  
General Description  
Features  
The MAX1724 evaluation kit (EV kit) is a fully assembled  
and tested surface-mount circuit board that contains  
two separate boost switching-regulator circuits. The  
left-side circuit contains a MAX1724 with a preset 3.3V  
output. Other preset voltages of 2.7V, 3.0V, or 5.0V are  
also available. The right-side circuit contains a  
MAX1722, which has an adjustable output voltage. This  
circuit’s output is set for 3.6V. All devices regulate with  
ꢀ 0.91V to V  
Input Voltage Range  
OUT  
ꢀ Two Complete Boost Circuits  
3.3V Fixed (MAX1724)  
3.6V Adjustable Output (MAX1722)  
ꢀ Up to 50mA Output from a 1-Cell Input  
Up to 100mA Output from a 2-Cell Input  
ꢀ 1.5µA Quiescent Current from V  
input voltages from 0.91V to V  
, making them ideal  
OUT  
OUT  
for 1- or 2-cell alkaline and NiMH battery applications.  
ꢀ Up to 90% Efficiency with Synchronous  
The right-side circuit may also be used to evaluate the  
MAX1723, which features a shutdown (SHDN) mode.  
The MAX1722/MAX1724 has a BATT pin, which lowers  
the guaranteed startup voltage from 1.2V to 0.91V.  
Rectification  
ꢀ Switching Frequency Up to 200kHz  
ꢀ All Surface-Mount Design  
The MAX1722/MAX1723/MAX1724 feature synchronous  
rectification and ultra-low (1.5µA typ) quiescent current  
for maximum efficiency and long battery life. Operation  
up to 200kHz allows tiny surface-mount components.  
ꢀ Fully Assembled and Tested Board  
Ordering Information  
PART  
TEMP. RANGE  
IC PACKAGE  
MAX1724EVKIT  
0°C to +70°C  
THIN SOT23-5  
Component Suppliers  
Component List  
DESIGNATION QTY  
DESCRIPTION  
SUPPLIER  
Murata  
PHONE  
FAX  
WEB  
814-237-1431 814-238-0490 www.murata.com  
847-956-0666 847-956-0702 www.sumida.com  
10µF, 10V X7R ceramic capacitors  
Taiyo Yuden JMK325BJ106MN  
C1–C4  
D1  
4
0
2
Sumida  
Not installed  
Taiyo  
Yuden  
408-573-4150 408-573-4159 www.T-yuden.com  
512-794-0081 512-794-0087 www.venkel.com  
10µH inductors  
Sumida CDR43-100MC  
L1, L2  
Venkel  
Note: Please indicate that you are using the MAX1724 when  
contacting these component suppliers.  
2M  
1ꢀ resistor (0805)  
R1  
R2  
U1  
U2  
1
1
1
1
Venkel CR0805-10W-2004FT  
1.02M 1ꢀ resistor (0805)  
Venkel CR0805-10W-1024FT  
Quick Start  
Maxim MAX1724EZK33  
(5-pin THIN SOT23, top mark ADQJ)  
The MAX1724 EV kit is fully assembled and tested.  
Follow these steps to verify board operation. Do not  
turn on the power supply until all connections are  
completed.  
Maxim MAX1722EZK (5-pin THIN  
SOT23, top mark ADQF)  
3.3V Output (left side):  
1) Connect a 0.91V to 3.3V supply to the VBATT pad.  
Connect the supply ground to the GND pad.  
JU1, JU2  
None  
2
2
1
3-pin headers  
Shunts JU1, JU2  
MAX1724 PC board  
None  
2) Connect a voltmeter to the VOUT pad.  
MAX1722/MAX1723/MAX1724 data  
sheet  
None  
None  
1
1
3) Verify there is a shunt across pins 1 and 2 of  
jumper JU1 (SHDN), thus enabling the MAX1724.  
MAX1724 EV kit data sheet  
4) Turn on the power supply and verify that the output  
is at 3.3V.  
Note: Quantities are for both circuits.  
________________________________________________________________ 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.  
1234

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