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参数资料
| 型号： | MAX1733EUK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ SOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 2 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 250mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | SOT-23-5 |
19-1586; Rev 0; 7/00
Low-Voltage, Step-Down DC-DC Converters
in SOT23
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.
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
Ordering Information
PART
MAX1733 EUK-T
MAX1734 EUK_ _-T
TEMP. RANGE
-40 ° C to +85 ° C
-40 ° C to +85 ° C
PIN-PACKAGE
5 SOT23-5
5 SOT23-5
Applications
Cellular, PCS, and Cordless Telephones
PDAs, Palmtops, and Handy-Terminals
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.
Selector Guide
Battery-Powered Equipment
PART
MAX1733EUK
MAX1734EUK18
MAX1734EUK15
V OUT (V)
Adjustable
1.8
1.5
TOP MARK
ADKY
ADKW
ADKX
Typical Operating Circuit
Pin Configuration
INPUT
+2.7V TO +5.5V
IN
LX
10 μ H
V OUT AT
250mA
TOP VIEW
2.2 μ F
MAX1734
22 μ F
IN
1
5
LX
SHDN
OUT
GND 2
MAX1733
MAX1734
GND
SHDN 3
4
OUT (FB)
SOT23-5
( ) ARE FOR MAX1733 ONLY.
________________________________________________________________ Maxim Integrated Products
1
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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1733EUK-TG05 | 功能描述:直流/直流开关转换器 Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1734EUK15 | 制造商:Maxim Integrated Products 功能描述:5 PIN COUNT SOT PACKAGE TYPE - Bulk |
| MAX1734EUK15+ | 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP DOWN 5PIN SOT-23 - Rail/Tube |
| MAX1734EUK15+T | 功能描述:直流/直流开关转换器 Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1734EUK15-T | 功能描述:直流/直流开关转换器 Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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