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MAX1544

更新时间： 2024-09-15 22:57:59
品牌 Logo 应用领域
美信 - MAXIM 控制器
页数 文件大小 规格书
42页 808K
描述
Dual-Phase, Quick-PWM Controller for AMD Hammer CPU Core Power Supplies

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19-2745; Rev 1; 9/03  
Dual-Phase, Quick-PWM Controller for  
AMD Hammer CPU Core Power Supplies  
General Description  
Features  
The MAX1544 is a dual-phase, Quick-PWM™, step-  
down controller for AMD Hammer™ CPU core supplies.  
Dual-phase operation reduces input ripple current  
requirements and output voltage ripple while easing  
component selection and layout difficulties. The Quick-  
PWM control scheme provides instantaneous response  
to fast load-current steps. The MAX1544 includes active  
voltage positioning with adjustable gain and offset,  
reducing power dissipation and bulk output capacitance  
requirements.  
o Dual-Phase, Quick-PWM Controller  
o ±±0.75 ꢀ Accuracy Over Line, Load, and  
OUT  
Temperature (103ꢀ)  
o Active ꢀoltage Positioning with Adjustable Gain  
and Offset  
o 7-Bit On-Board DAC: ±06.7ꢀ to 1077ꢀ Output  
Adjust Range  
o Selectable 1±±kHz/2±±kHz/3±±kHz/77±kHz  
Switching Frequency  
The MAX1544 is intended for two different notebook CPU  
core applications: stepping down the battery directly or  
stepping down the 5V system supply to create the core  
voltage. The single-stage conversion method allows this  
device to directly step down high-voltage batteries for the  
highest possible efficiency. Alternatively, two-stage con-  
version (stepping down the 5V system supply instead of  
the battery) at a higher switching frequency provides the  
minimum possible physical size.  
o 4ꢀ to 28ꢀ Battery Input ꢀoltage Range  
o Adjustable Slew-Rate Control  
o Drives Large Synchronous Rectifier MOSFETs  
o Selectable Output Overvoltage Protection  
o Undervoltage and Thermal-Fault Protection  
o Power Sequencing and Timing  
o Selectable Suspend ꢀoltage  
The MAX1544 complies with AMD’s desktop and  
mobile CPU specifications. The switching regulator fea-  
tures soft-start and power-up sequencing, and  
soft-shutdown. The MAX1544 also features indepen-  
dent four-level logic inputs for setting the suspend volt-  
age (S0–S1).  
o Soft-Shutdown  
o Selectable Single- or Dual-Phase Pulse Skipping  
Ordering Information  
The MAX1544 includes output undervoltage protection,  
thermal protection, and voltage regulator power-OK  
(VROK) output. When any of these protection features  
detect a fault, the controller shuts down. Additionally, the  
MAX1544 includes selectable overvoltage protection.  
PART  
TEMP RANGE  
PIN-PACKAGE  
MAX1544ETL -40°C to +100°C 40 Thin QFN 6mm ✕ 6mm  
Pin Configuration  
The MAX1544 is available in a low-profile, 40-pin 6mm  
x 6mm thin QFN package. For other CPU platforms,  
refer to the pin-to-pin compatible MAX1519/MAX1545  
and MAX1532/MAX1546/MAX1547 data sheets.  
TOP VIEW  
TIME  
TON  
SUS  
S0  
1
2
30  
V
DD  
Applications  
AMD Hammer Desktop or Notebook PCs  
29 DLM  
28 DHM  
27 LXM  
26 BSTM  
25 VROK  
24 D0  
3
4
Multiphase CPU Core Supply  
S1  
5
MAX1544  
SHDN  
OFS  
REF  
6
Voltage-Positioned Step-Down Converters  
Servers/Desktop Computers  
7
D1  
8
23  
ILIM  
9
22 D2  
21 D3  
10  
V
CC  
Quick-PWM is a trademark of Maxim Integrated Products, Inc.  
Hammer is a trademark of AMD.  
THIN QFN  
________________________________________________________________ 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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