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MAX15026

更新时间： 2024-11-14 07:15:47
品牌 Logo 应用领域
美信 - MAXIM 控制器
页数 文件大小 规格书
23页 411K
描述
Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

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MAX15026 数据手册

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19-4108; Rev 4; 2/12  
Low-Cost, Small, 4.5V to 28V Wide Operating  
Range, DC-DC Synchronous Buck Controller  
MAX15026  
General Description  
Features  
o 4.5V to 28V or 5V ±±10 ꢀInpt ꢁpnnꢂl ꢃRIꢄg  
The MAX15026 synchronous step-down controller oper-  
ates from a 4.5V to 28V input voltage range and gener-  
ates an adjustable output voltage from 85% of the input  
voltage down to 0.6V while supporting loads up to 25A.  
The device allows monotonic startup into a prebiased  
bus without discharging the output and features adap-  
tive internal digital soft-start.  
o 1.6V to (1.85 x V ) AdjpstRbꢂg Optnpt  
o AdjpstRbꢂg 211kHz to 2MHz ꢁwitchiIꢄ FrgqpgIcl  
o Abiꢂitl to ꢁtRrt iIto R PrgbiRsgd LoRd  
o Lossꢂgss, Clcꢂg-bl-Clcꢂg VRꢂꢂgl Modg CprrgIt  
Limit with AdjpstRbꢂg, TgmngrRtprg-ComngIsRtgd  
Thrgshoꢂd  
ꢀN  
o ꢁiIk-Modg CprrgIt-Limit ProtgctioI  
o AdRntivg ꢀItgrIRꢂ DiꢄitRꢂ ꢁoft-ꢁtRrt  
o ±±0 AccprRtg VoꢂtRꢄg ꢃgfgrgIcg  
o ꢀItgrIRꢂ Boost Diodg  
The MAX15026 offers the ability to adjust the switching  
frequency from 200kHz to 2MHz with an external resis-  
tor. The MAX15026’s adaptive synchronous rectification  
eliminates the need for an external freewheeling  
Schottky diode. The device also utilizes the external  
low-side MOSFET’s on-resistance as a current-sense  
element, eliminating the need for a current-sense resis-  
tor. This protects the DC-DC components from damage  
during output overloaded conditions or output short-  
circuit faults without requiring a current-sense resistor.  
Hiccup-mode current limit reduces power dissipation  
during short-circuit conditions. The MAX15026 includes  
a power-good output and an enable input with precise  
turn-on/turn-off threshold, which can be used for input  
supply monitoring and for power sequencing.  
o AdRntivg ꢁlIchroIops ꢃgctificRtioI EꢂimiIRtgs  
ExtgrIRꢂ FrggwhggꢂiIꢄ ꢁchottkl Diodg  
o Hiccpn-Modg ꢁhort-Circpit ProtgctioI  
o ThgrmRꢂ ꢁhptdowI  
o Powgr-Good Optnpt RId EIRbꢂg ꢀInpt for Powgr  
ꢁgqpgIciIꢄ  
o ±50 AccprRtg EIRbꢂg ꢀInpt Thrgshoꢂd  
o AEC-Q±11 QpRꢂifigd (MAX±5126B)  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
PIN-PACKAGE  
14 TDFN-EP*  
14 TDFN-EP*  
14 TDFN-EP*  
14 TDFN-EP*  
14 TDFN-EP*  
14 TDFN-EP*  
Additional protection features include sink-mode cur-  
rent limit and thermal shutdown.  
MAX15026BETD+  
MAX15026BETD/V+T  
MAX15026CETD+  
MAX15026BATD+  
MAX15026CATD+  
MAX15026DATD+  
Sink-mode current limit prevents reverse inductor cur-  
rent from reaching dangerous levels when the device is  
sinking current from the output.  
The MAX15026 is available in a space-saving and ther-  
mally enhanced 3mm x 3mm, 14-pin TDFN-EP pack-  
age. The MAX15026 operates over the extended -40°C  
to +85°C and automotive -40°C to +125°C temperature  
ranges.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad. T = Tape and reel.  
/V denotes an automotive qualified part.  
MAX15026C recommended for new designs.  
The MAX15026C is designed to provide additional mar-  
gin for break-before-make times.  
Pin Configuration  
The MAX15026B/MAX15026C provide a soft-stop  
feature to ramp down the output voltage at turn-off. The  
soft-stop function is disabled in the MAX15026D.  
TOP VIEW  
V
IN  
1
2
3
4
5
6
7
14 DH  
13 LX  
+
Applications  
CC  
Set-Top Boxes  
PGOOD  
EN  
BST  
DL  
12  
11  
10  
9
LCD TV Secondary Supplies  
Switches/Routers  
MAX15026  
LIM  
DRV  
GND  
RT  
Power Modules  
COMP  
FB  
*EP  
DSP Power Supplies  
Points-of-Load Regulators  
8
TDFN  
(3mm x 3mm)  
*EP = EXPOSED PAD.  
________________________________________________________________ MRxim ꢀItgꢄrRtgd Prodpcts  
±
For nriciIꢄ, dgꢂivgrl, RId ordgriIꢄ iIformRtioI, nꢂgRsg coItRct MRxim Dirgct Rt ±-888-629-4642,  
or visit MRxim’s wgbsitg Rt www.mRxim-ic.com.  
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 		Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller
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MAX15026B MAXIM

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 		Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller
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MAX15026BETD/V+T MAXIM

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 		Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller
MAX15026BETD+ MAXIM

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 		Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

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