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MAX1778EVKIT

更新时间： 2024-02-14 13:36:01
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
6页 200K
描述
Evaluation Kit for the MAX1778/MAX1880/MAX1881/MAX1882

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MAX1778EVKIT 数据手册

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19-2063; Rev 0; 6/01  
MAX1778 Evaluation Kit  
General Description  
Features  
The MAX1778 evaluation kit (EV kit) is a fully assembled  
and tested surface-mount circuit board that contains a  
step-up switching regulator, two charge-pump voltage-  
o +2.7V to +5.5V Input Range  
o Output Voltages  
+8V, >200mA (Step-Up Switching Regulator)  
+20V, >10mA (Positive Charge-Pump Regulator)  
-5V, >20mA (Negative Charge-Pump Regulator)  
+2.5V, >200mA (LDO Linear Regulator)  
regulator circuits, a V  
buffer, and a low-drop out  
COM  
linear regulator (LDO). The step-up switching circuit is  
configured for a +8V output that provides up to 250mA  
of current from a +3.0V supply. The EV kit can be pow-  
ered from a +2.7V to +5.5V supply.  
+4V, >150mA Peak (V  
Buffer)  
COM  
The positive charge-pump circuit is configured for a  
+20V output that provides more than 10mA of current.  
The negative charge-pump circuit is configured for a  
-5V output and provides more than 20mA of current.  
Power for both charge-pump inputs is provided from  
the step-up switching regulator output.  
o All Outputs Are Adjustable with Resistors  
o >91% Efficiency  
o Internal MOSFET Switches  
o <1µA (typ) IC Shutdown Current  
o 1MHz Step-Up Switching Regulator Frequency  
The EV kit also features an LDO linear regulator circuit,  
which is configured for a +2.5V output that provides  
more than 200mA of current. Power for the LDO regula-  
o 500kHz Charge-Pump Regulator Switching  
Frequency  
o Adjustable Fault-Trip Level  
tor circuit is provided from the input supply. The V  
COM  
buffer provides a +4V output and more than 150mA of  
peak current. The step-up switching regulator output  
o Low-Profile External Components  
o Built-In Transient Load Tester  
o Surface-Mount Components  
o Fully Assembled and Tested  
provides power to the V  
buffer.  
COM  
The MAX1778 EV kit demonstrates low quiescent cur-  
rent and high efficiency (over 91%). High-frequency  
operation (500kHz/1MHz) allows the use of tiny surface-  
mount components and fast transient response. The  
MAX1778 TSSOP package (1.1mm max) with low-pro-  
file external components allows this circuit to be less  
than 1.2mm in height. A built-in transient load tester  
facilitates transient load tests. The MAX1778 EV kit can  
also be used to evaluate the MAX1880, MAX1881, and  
MAX1882 ICs.  
Ordering Information  
PART  
TEMP. RANGE  
IC PACKAGE  
MAX1778EVKIT  
0 C to +70 C  
24 TSSOP  
Component List  
DESIGNATION  
QTY  
DESCRIPTION  
DESIGNATION  
QTY  
DESCRIPTION  
1µF 10%, 16V X7R ceramic  
capacitors (1206)  
Murata GRM42-6X7R105K016  
3.3µF 10%, 10V X7R ceramic  
capacitors (1210)  
Taiyo Yuden LMK325BJ335KD  
C5, C7, C11,  
C13, C25 C29  
C1, C16, C17,  
C18, C21  
9
5
1000pF 10%, 50V X7R  
ceramic capacitor (0603)  
Murata GRM39X7R102K050AD  
0.47µF 10%, 10V X7R ceramic  
capacitor (0603)  
Taiyo Yuden LMK107BJ474KA  
C8  
1
C2  
1
2
4
0.22µF 10%, 10V X7R ceramic  
capacitor (0603)  
Taiyo Yuden LMK107BJ224KA  
0.01µF 10%, 50V X7R ceramic  
capacitors (0603)  
Murata GRM39X7R103K050AD  
C9  
1
0
C3, C14  
0.1µF 20%, 16V X7R ceramic  
capacitors (0603)  
C12, C20, C24  
Not installed (0603)  
C4, C6, C10, C22  
Taiyo Yuden EMK107BJ104MA  
________________________________________________________________ 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.  
123456

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