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MAX1876EEG+T

更新时间： 2024-02-05 14:52:34
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美信 - MAXIM 控制器
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19-2431; Rev 0; 7/02  
Dual 180° Out-of-Phase PWM Step-  
Down Controllers with POR  
General Description  
Features  
The MAX1875/MAX1876 dual, synchronized, step-down  
controller generates two outputs from input supplies  
ranging from 4.75V to 23V. Each output is adjustable from  
sub-1V to 18V and supports loads of 10A or higher. Input  
voltage ripple and total RMS input ripple current are  
reduced by synchronized 180° out-of-phase operation.  
o Two Independent Output Voltages  
o 180° Out-of-Phase Operation  
o 90° Out-of-Phase Operation  
(Using Two MAX1875/MAX1876s)  
o Foldback Current Limit  
The switching frequency is adjustable from 100kHz to  
600kHz with an external resistor. Alternatively, the con-  
troller can be synchronized to an external clock gener-  
ated to another MAX1875/MAX1876 or a system clock.  
One MAX1875/MAX1876 can be set to generate an in-  
phase, or 90° out-of-phase, clock signal for synchro-  
nization with additional controllers. This allows two  
controllers to operate either as an interleaved two- or  
four-phase system with each output shifted by 90°.  
These devices also feature soft-start and soft-stop.  
o 4.75V to 23V Input Supply Range  
o 0 to 18V Output-Voltage Range (Up to 10A)  
o >90% Efficiency  
o Fixed-Frequency Pulse-Width Modulation (PWM)  
Operation  
o Adjustable 100kHz to 600kHz Switching  
Frequency  
The MAX1875/MAX1876 eliminate the need for current-  
sense resistors by utilizing the low-side MOSFET’s on-  
resistance as a current-sense element. This protects  
the DC-DC components from damage during output-  
overload conditions or when output short-circuit faults  
without requiring a current-sense resistor. Adjustable  
foldback current limit reduces power dissipation during  
short-circuit conditions. The MAX1876 includes a  
power-on reset output to signal the system when both  
outputs reach regulation.  
o External SYNC Input  
o Clock Output for Master/Slave Synchronization  
o Soft-Start and Soft-Stop  
o RST Output with 140ms Minimum Delay (MAX1876)  
o Lossless Current Limit (No Sense Resistor)  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
24 QSOP  
The MAX1875/MAX1876 are available in a 24-pin QSOP  
package. An evaluation kit is available to speed designs.  
MAX1875EEG  
MAX1876EEG  
24 QSOP  
Applications  
Network Power Supplies  
Telecom Power Supplies  
DSP, ASIC, and FPGA Power Supplies  
Set-Top Boxes  
Pin Configuration  
TOP VIEW  
COMP2  
1
2
3
4
5
6
7
8
9
24 EN  
FB2  
ILIM2  
OSC  
V+  
23 DH2  
Broadband Routers  
Servers  
22  
LX2  
21 BST2  
20 DL2  
REF  
MAX1875/  
MAX1876  
19 V  
L
GND  
CKO  
SYNC  
18 PGND  
17 DL1  
Typical Operating Circuit appears at end of data sheet.  
16 BST1  
ILIM1 10  
FB1 11  
15  
14  
LX1  
DH1  
COMP1 12  
13 RST  
(MAX1876 ONLY)  
QSOP  
________________________________________________________________ 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.  
1234567...21

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MAX1876EEG+T 替代型号

型号 品牌 替代类型 描述 数据表
MAX1876EEG MAXIM

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