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參數資料
| 型號： | MAX1745EUB/V+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High-Voltage, Step-Down DC-DC Controller in µMAX |
| 中文描述： | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | ROHS COMPLIANT, M0-187BA, UMAX-10 |
| 文件頁數： | 1/15頁 |
| 文件大小： | 299K |
| 代理商： | MAX1745EUB/V+ |
General Description
The MAX1744/MAX1745 are step-down DC-DC con-
trollers capable of handling up to 36V inputs. These
parts use a proprietary current-limited control scheme
for excellent light- and full-load efficiency, while their
330kHz (max) switching frequency permits small exter-
nal components for space-critical applications.
Operation to 100% duty cycle permits the lowest possi-
ble dropout voltage.
The MAX1744 contains an internal feedback network
that provides a pin-selectable output voltage of either
3.3V or 5V. The MAX1745 uses an external feedback
network to generate an adjustable output voltage
between 1.25V and 18V.
The MAX1744/MAX1745 are available in a space-sav-
ing 10-pin μMAX package.
________________________Applications
Automotive Electronics
Telecom Systems
Wall-Cube-Powered Devices
Industrial Control Systems
Firewire/IEEE 1394
____________________________Features
High-Voltage Operation (Up to 36V IN)
Efficiency > 90%
Output Power Capability Exceeds 50W
10-Pin Max Package
Low-Dropout Voltage
100% (max) Duty Cycle
90A Quiescent Current
4A Shutdown Current
Up to 330kHz Switching Frequency
Output Voltage
5V or 3.3V (MAX1744)
Adjustable 1.25V to 18V (MAX1745)
Current-Limited Control Scheme
MAX1744/MAX1745
High-Voltage, Step-Down DC-DC
Controllers in MAX
________________________________________________________________
Maxim Integrated Products
1
19-1776; Rev 4; 8/09
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX1744EUB+
-40
°C to +85°C
10 μMAX
MAX1744AUB+
-40
°C to +125°C
10 μMAX
MAX1744EUB/V+
-40
°C to +85°C
10 μMAX
MAX1745EUB+
-40
°C to +85°C
10 μMAX
MAX1745AUB+
-40
°C to +125°C
10 μMAX
MAX1745EUB/V+
-40
°C to +85°C
10 μMAX
GND
OUT
REF
VL
CS
MAX1744
3/5
5V
3.3V
ON
OFF
SHDN
IN
VH
EXT
P
IN
4.5V TO 36V
OUT
3.3V
OR 5V
Typical Operating Circuit
1
+
2
3
4
5
10
9
8
7
6
IN
EXT
VH
3/5 (FB)
( ) ARE FOR MAX1745 ONLY.
REF
VL
GND
MAX1744
MAX1745
μMAX
TOP VIEW
CS
OUT
SHDN
Pin Configuration
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
EVALUATION
KIT
AVAILABLE
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Firewire is a registered trademark of Apple, Inc.
IEEE is a registered service mark of the Institute of Electrical
and Electronics Engineers, Inc.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
/V Denotes an automotive qualified part.
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