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MAX1536

更新时间： 2024-09-16 14:58:15
品牌 Logo 应用领域
亚德诺 - ADI 开关稳压器
页数 文件大小 规格书
19页 857K
描述
3.6A、1.4MHz、低电压、内置开关、降压型稳压器，带有动态输出电压控制

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MAX1536 数据手册

 浏览型号MAX1536的Datasheet PDF文件第2页浏览型号MAX1536的Datasheet PDF文件第3页浏览型号MAX1536的Datasheet PDF文件第4页浏览型号MAX1536的Datasheet PDF文件第5页浏览型号MAX1536的Datasheet PDF文件第6页浏览型号MAX1536的Datasheet PDF文件第7页 
19-2729; Rev 1; 8/05  
3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-  
Down Regulator with Dynamic Output Voltage Control  
General Description  
Features  
The MAX1536 constant-off-time, pulse-width-modulated  
(PWM) step-down DC-to-DC converter is ideal for use in  
+5.0V and +3.3V to low voltages for notebook and sub-  
notebook computers. The MAX1536 features an internal  
PMOS power switch and internal synchronous rectifica-  
tion for high efficiency and reduced component count. No  
external Schottky diode is required across the internal  
synchronous rectifier switch. The internal 54mΩ PMOS  
power switch and 47mΩ NMOS synchronous-rectifier  
switch easily deliver continuous load currents up to 3.6A.  
The MAX1536 produces dynamically adjustable output  
voltages for chipsets and graphics processor cores using  
a logic-level control signal. The MAX1536 achieves effi-  
ciencies as high as 96%.  
♦ Dynamically Selectable Output Voltage from  
+0.7V to V  
♦ Internal PMOS/NMOS Switches  
IN  
54mΩ/47mΩ On-Resistance at V = +4.5V  
63mΩ/53mΩ On-Resistance at V = +3.0V  
♦ +3.0V to +5.5V Input Voltage Range  
♦ 1.4MHz Maximum Switching Frequency  
♦ 2V 0.75ꢀ Reference Output  
IN  
IN  
♦ Constant-Off-Time PWM Operation  
♦ Selectable Idle Mode/PWM Operation at Light  
Loads  
♦ 100ꢀ Duty Factor in Dropout  
The MAX1536 uses a unique current-mode, constant-off-  
time, PWM control scheme. It has selectable Idle  
ModeTM to maintain high efficiency during light-load  
operation, or fixed-PWM mode for low output ripple. The  
programmable constant-off-time architecture allows a  
wide range of switching frequencies up to 1.4MHz, opti-  
mizing performance trade-offs between efficiency, output  
switching noise, component size, and cost. The  
MAX1536 features a digital soft-start to limit surge cur-  
rents during startup, a 100% duty-cycle mode for low-  
dropout operation, and a low-power shutdown mode that  
disconnects the input from the output and reduces supply  
current below 1µA. The MAX1536 is available in a 28-pin  
thin QFN package with an exposed backside pad.  
♦ Digital Soft-Start Inrush Current Limiting  
♦ <1µA Typical Shutdown Supply Current  
♦ <750µA Quiescent Supply Current  
♦ Thermal Shutdown  
♦ 1ꢀ V  
Accuracy Over Line and Load  
OUT  
♦ External Reference Input  
♦ Power-Good Window Comparator  
♦ Selectable Power-Good Blanking Time During  
Output-Voltage Transition  
Ordering Information  
PART  
TEMP RANGE  
-40oC to +85oC  
-40oC to +85oC  
PIN-PACKAGE  
________________________Applications  
MAX1536ETI  
MAX1536ETI+  
28 Thin QFN 5mm x 5mm  
28 Thin QFN 5mm x 5mm  
Chipset/Graphics Cores  
with Dual-Supply Voltages  
Notebook Computers  
DDR Memory Termination  
+Denotes lead-free package.  
Active Termination Buses  
Pin Configuration  
Minimal Operating Circuit  
TOP VIEW  
V
V
IN  
OUT  
21 20 19 18 17 16 15  
+3.0V TO +5.5V  
+0.7V TO V  
IN  
LX  
FB  
IN  
PGND  
PGND  
REF  
13 REFIN  
22  
23  
14  
OD  
LX 24  
12  
11  
10  
9
V
PGND  
AGND  
CC  
OD  
25  
26  
27  
28  
N.C.  
LX  
SHDN  
MAX1536  
GATE  
MAX1536  
REF  
COMP  
PGND  
TOFF  
N.C.  
EXPOSED PADDLE  
PGOOD  
8
PGND  
REFIN  
TOFF  
SKIP  
1
2
3
4
5
6
7
THIN QFN  
A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES.  
Idle Mode is a trademark of Maxim Integrated Products, Inc.  
________________________________________________________________ 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...19

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