參數(shù)資料
型號(hào)： MAX1733
廠商： Maxim Integrated Products, Inc.
英文描述： Replaced by TMS320VC5506 :
中文描述： 低電壓、降壓型DC-DC轉(zhuǎn)換器，SOT23封裝
文件頁數(shù)： 1/8頁
文件大?。?/td> 265K
代理商： MAX1733
General Description
The MAX1733/MAX1734 step-down DC-DC converters
deliver over 250mA to outputs as low as 1.25V. These
converters use a unique proprietary current-limited con-
trol scheme that achieves over 90% efficiency. These
devices maintain extremely low quiescent supply cur-
rent (40μA), and their high 1.2MHz (max) operating fre-
quency permits small, low-cost external components.
This combination of features makes the MAX1733/
MAX1734 excellent high-efficiency alternatives to linear
regulators in space-constrained applications.
Internal synchronous rectification greatly improves effi-
ciency and eliminates the external Schottky diode
required in conventional step-down converters. Both
devices also include internal digital soft-start to limit
input current upon startup and reduce input capacitor
requirements.
The MAX1733 provides an adjustable output voltage
(1.25V to 2.0V). The MAX1734 provides factory-preset
output voltages (see
Selector Guide
). Both are avail-
able in space-saving 5-pin SOT23 packages.
Applications
Cellular, PCS, and Cordless Telephones
PDAs, Palmtops, and Handy-Terminals
Battery-Powered Equipment
Features
o
250mA Guaranteed Output Current
o
Synchronous Rectifier for Over 90% Efficiency
o
Tiny 5-Pin SOT23 Package
o
40μA Quiescent Supply Current
o
0.01μA Logic-Controlled Shutdown
o
Up to 1.2MHz Switching Frequency
o
Fixed 1.8V or 1.5V Outputs (MAX1734)
o
Adjustable Output Voltage (MAX1733)
o
±1.5% Initial Accuracy
o
2.7V to 5.5V Input Range
o
Soft-Start Limits Startup Current
M
Low-Voltage, Step-Down DC-DC Converters
in SOT23
________________________________________________________________
Maxim Integrated Products
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1
GND
OUT (FB)
( ) ARE FOR MAX1733 ONLY.
SHDN
1
5
LX
IN
MAX1733
MAX1734
SOT23-5
TOP VIEW
2
3
4
Pin Configuration
OUT
V
OUT
AT
250mA
INPUT
+2.7V TO +5.5V
LX
IN
MAX1734
SHDN
GND
10
μ
H
22
μ
F
2.2
μ
F
Typical Operating Circuit
19-1586; Rev 0; 7/00
Note:
The MAX1734 offers two output voltages. See the Selector
Guide, then insert the proper designator into the blanks above to
complete the part number.
Ordering Information
PART
TEMP. RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
PIN-PACKAGE
5 SOT23-5
5 SOT23-5
MAX1733
EUK-T
M A X1 7 3 4
E U K_ _- T
Selector Guide
PART
V
OUT
(V)
Adjustable
1.8
1.5
TOP MARK
ADKY
ADKW
ADKX
MAX1733EUK
MAX1734EUK18
MAX1734EUK15
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1733EUK 制造商:Maxim Integrated Products 功能描述:5 PIN COUNT SOT PACKAGE TYPE - Bulk
MAX1733EUK+ 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP DOWN 5PIN SOT-23 - Rail/Tube
MAX1733EUK+T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1733EUK-T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1733EUK-TG05 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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