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參數(shù)資料
| 型號： | MAX1875-MAX1876 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual 180∑ Out-of-Phase PWM Step- Down Controllers with POR |
| 中文描述： | 雙180Σ外的三相PWM降壓控制器的復(fù)位 |
| 文件頁數(shù)： | 1/21頁 |
| 文件大?。?/td> | 493K |
| 代理商： | MAX1875-MAX1876 |
General Description
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.
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.
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.
The MAX1875/MAX1876 are available in a 24-pin QSOP
package. An evaluation kit is available to speed designs.
Applications
Network Power Supplies
Telecom Power Supplies
DSP, ASIC, and FPGA Power Supplies
Set-Top Boxes
Broadband Routers
Servers
Features
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
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
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
M
Dual 180° Out-of-Phase PWM Step-
Down Controllers with POR
________________________________________________________________
Maxim Integrated Products
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.
1
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
EN
LX2
DH2
BST2
OSC
ILIM2
FB2
COMP2
TOP VIEW
DL2
V
L
PGND
DL1
CKO
GND
REF
V+
16
15
14
13
9
10
11
12
BST1
DH1
LX1
COMP1
FB1
ILIM1
SYNC
QSOP
MAX1875/
MAX1876
RST
(MAX1876 ONLY)
Pin Configuration
19-2431; Rev 0; 7/02
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
PIN-PACKAGE
24 QSOP
24 QSOP
MAX1875
EEG
MAX1876
EEG
Typical Operating Circuit appears at end of data sheet.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1876AEEG | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX1876AEEG+ | 功能描述:電壓模式 PWM 控制器 Dual 180 Out PWM Step-Down RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX1876AEEG+T | 功能描述:電壓模式 PWM 控制器 Dual 180 Out PWM Step-Down RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX1876AEEG-T | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX1876EEG | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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