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MAX5093

更新时间: 2024-11-03 14:57:59
品牌 Logo 应用领域
亚德诺 - ADI 调节器
页数 文件大小 规格书
23页 1912K
描述
4V至72V输入LDO,具有boost前置调节器

MAX5093 数据手册

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EVALUATION KIT AVAILABLE  
MAX5092/MAX5093  
4V to 72V Input LDOs with Boost Preregulator  
General Description  
Features  
Wide Operating Input Voltage Range: 3.5V to 72V  
The MAX5092A/MAX5092B/MAX5093A/MAX5093B low-  
quiescent-current, low-dropout (LDO) regulators contain  
simple boost preregulators operating at a high fre-  
quency. The devices seamlessly provide a preset 3.3V  
(MAX5092A/MAX5093A) or 5V (MAX5092B/MAX5093B)  
LDO output voltage from a cold-crank through load-dump  
(3.5V to 80V) input voltage conditions. The MAX5092_/  
MAX5093_ deliver up to 250mA with excellent load and  
line regulation. During normal operation, when the battery  
is healthy, the boost preregulator is completely turned off,  
reducing quiescent current to 65μA (typ). This makes the  
devices suitable for always-on power supplies.  
with a 4V Startup Voltage  
LDO Output Regulates to 5V Seamlessly from an  
Input Voltage of 3.5V to 72V  
Up to 250mA Output Current  
Preset 3.3V, 5V, or Externally Programmable LDO  
Output Voltage from 1.5V to 9V (MAX5092_) or from  
1.5V to 10V (MAX5093_)  
Preset 7V or Externally Programmable Boost  
Output Voltage Up to 11V (MAX5092_) or Up to 12V  
(MAX5093_)  
● 65μA Quiescent Current in LDO Mode (V ≥ 8V)  
IN  
The buck-boost operation achieved by this combination of  
LDO and boost preregulator offers the advantage of using  
a single off-the-shelf inductor in place of the multiple-  
winding custom magnetics needed in typical single-ended  
primary inductor converter (SEPIC) and transformer-  
based flyback topologies. The high operating frequency  
of the boost regulator significantly reduces component  
size. The MAX5092_ integrates a blocking diode to fur-  
ther reduce the external component count. The boost  
preregulator output voltage is preset to 7V. Both LDO and  
boost output voltages are programmable using external  
resistors. The boost preregulator output voltage is adjust-  
able up to 11V(MAX5092_), or up to 12V (MAX5093_).  
The LDO output voltage is adjustable from 1.5V to 9V  
(MAX5092_) or from 1.5V to 10V (MAX5093_).  
5μA Shutdown Current  
Power-On Reset (RESET) with Programmable  
Timeout Period  
Output Short-Circuit and Thermal Protection  
TQFN Package Capable of Dissipating Up to 2.7W at  
+70°C  
Ordering Information  
PART  
TEMP RANGE  
PIN-PACKAGE  
MAX5092AATE+  
MAX5092BATE+  
MAX5093AATE+  
MAX5093BATE+  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
16 TQFN-EP*  
16 TQFN-EP*  
16 TQFN-EP*  
16 TQFN-EP*  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
The devices feature a shutdown mode with 5μA (typ) shut-  
down current, a HOLD input to implement a self-holding cir-  
cuit, and a power-on-reset output (RESET) with an externally  
programmable timeout period. Additional features include  
output overload, short-circuit, and thermal protection.  
Pin Configuration  
TOP VIEW  
The MAX5092_/MAX5093_ are available in a thermally  
enhanced, 16-pin 5mm x 5mm thin QFN package and  
can dissipate up to 2.7W at +70°C on a multilayer PC  
board (PCB).  
12  
11  
10  
9
OUT  
8
7
6
5
BSFB 13  
VL 14  
MAX5092_/  
MAX5093_  
OUT_SENSE  
SET  
Applications  
Industrial  
CT 15  
16  
PGND_LDO  
RESET  
+
1
2
3
4
Typical Operating Circuit and Selector Guide appear at end  
of data sheet.  
THIN QFN  
(5mm x 5mm)  
19-0659; Rev 2; 10/14  

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