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MAX1875EVKIT PDF预览

MAX1875EVKIT

更新时间: 2024-02-23 21:05:46
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描述
Evaluation Kit for the MAX1875/MAX1876/MAX1858

MAX1875EVKIT 数据手册

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19-2611; Rev 0; 10/02  
MAX1875 Evaluation Kit  
General Description  
Features  
8V to 18V Input Voltage Range  
The MAX1875 evaluation kit (EV kit) demonstrates a low-  
cost application circuit. This dual-PWM synchronous DC-  
to-DC converter operates from unregulated AC adapters  
and generates precision, low-voltage rails for broad-  
band gateways, digital TVs, cable modems, and set-  
top boxes.  
1.8V and 3.3V Adjustable Output Voltages  
3.5A Output Current (1.8V Output)  
3.5A Output Current (3.3V Output)  
Lossless Foldback Current Limit  
100kHz Switching Frequency  
The MAX1875 EV kit provides dual 1.8V and 3.3V output  
voltages from an 8V to 18V input voltage range. It delivers  
up to 3.5A output current for the 1.8V output and the 3.3V  
output, with greater than 90% efficiency. Both converters  
operate 180 degrees out-of-phase to reduce input ripple  
current. The EV kit operates at 100kHz switching frequency.  
RST Output with 140ms Delay  
(MAX1876/MAX1858 only)  
180 Degree Out-of-Phase Operation  
24-Pin QSOP Package  
This EV kit is a fully assembled and tested circuit  
board. It also allows evaluation of other output voltages  
in the 0.75V to 15V range.  
Low-Cost Components  
Fully Assembled and Tested  
The MAX1875 EV kit can also be used to evaluate the  
MAX1876 and MAX1858.  
Ordering Information  
PART  
TEMP RANGE  
IC PACKAGE  
MAX1875EVKIT  
0°C to +70°C  
24 QSOP  
Component List  
DESIGNATION QTY  
DESCRIPTION  
DESIGNATION QTY  
DESCRIPTION  
27µH 5A power inductor  
L2  
1
390µF, 25V aluminum electrolytic  
capacitors Sanyo 25MV390AX  
C1, C4  
2
N1A, N1B,  
N2A, N2B  
Dual N-channel MOSFETs 8-pin SO  
Fairchild FDS6990A  
2
C5, C6, C12  
3
1
1
0.1µF ceramic capacitors (0805)  
0.39µF ceramic capacitor (0805)  
0.33µF ceramic capacitor (0805)  
C7  
C8  
D2D5  
R1  
0
1
2
1
1
1
1
1
1
1
1
2
1
1
2
1
2
1
Not installed (open)  
8.06k  
10k  
1% resistor (0805)  
1% resistors (0805)  
1% resistor (0805)  
1% resistor (0805)  
5% resistor (0805)  
5% resistor (0805)  
1% resistor (0805)  
1% resistor (0805)  
5% resistor (0805)  
5% resistor (0805)  
5% resistors (0805)  
1% resistor (0805)  
1% resistor (0805)  
R2, R4  
R3  
C9, C10, C11,  
C13, C14  
5
470µF, 10V aluminum electrolytic  
capacitors Sanyo 10MV470AX  
23.2k  
60.4k  
2.7k  
2k  
R5  
C17  
C18  
1
1
2200pF ceramic capacitor (0805)  
1500pF ceramic capacitor (0805)  
R6  
R7  
0.22µF, 16V X5R ceramic capacitor  
(0805) Taiyo Yuden EMK212BJ224KG  
C19  
C20  
1
1
R8  
49.9k  
69.8k  
100k  
20  
R9  
4.7µF, 10V X5R ceramic capacitor  
(1206) Taiyo Yuden LMK316BJ475ML  
R10  
R11  
0.22µF, 50V X7R ceramic capacitor  
(0805) Taiyo Yuden UMK212BJ224MG  
or TDK C2012X7R1H224M  
R12, R13  
R14  
3.9  
C21  
1
154k  
84.5k  
R15  
C22, C23  
2
0
0.01µF ceramic capacitors (0805)  
Not installed (open)  
JU1, JU2  
U1  
3-pin headers  
C2, C3, C15  
MAX1875EEG 24-pin QSOP  
Shunts  
100mA, 30V dual Schottky diode 23-pin  
SOT Central Semiconductor CMPSH-3A  
D1  
L1  
1
1
None  
None  
MAX1875 PC board  
15µH 5A power inductor  
________________________________________________________________ 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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