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| 型号： | MAX1947ETA25+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/11页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SYNC 2.5V 0.25A 8TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 2.5V |
| 输入电压： | 0.7 V ~ 3.6 V |
| 频率 - 开关： | 最高 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： | 8-WDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 其它名称： | MAX1947ETA25+TDKR |
19-3086; Rev 2; 10/06
ATION
EVALU
AVAILA
KIT
BLE
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
General Description
The MAX1947 is a compact, high-efficiency, step-up DC-
DC converter that regulates output voltages from 1.8V to
Features
? Low Input (0.7V) and Output (1.8V) Voltage
Capability
3.3V to power μP/DSP cores, memory, and I/O rails in 1-
and 2-cell alkaline/NiMH/NiCd battery-powered systems.
It features an internal 800mA switch and synchronous
rectifier to achieve up to 94% efficiency and to eliminate
the need for an external Schottky diode.
High-frequency switching (up to 2MHz) results in low
ripple and small external components, while automatic
pulse skipping at light loads reduces supply current to
just 70μA for extended battery life. Maxim’s proprietary
True Shutdown? reduces supply current to just 2μA
and fully discharges the output to ground. The convert-
er is offered in fixed-output voltages of 1.8V, 2.5V, 3.0V,
?
?
?
?
?
?
?
Internal Synchronous Rectifier
High 94% Efficiency
Fixed Output Voltages: 1.8V, 2.5V, 3V, and 3.3V
Up to 2MHz Switching Allows Small External
Components and Low Output Ripple
Automatic Pulse Skipping at Light Loads for
Extended Battery Life
Low 70μA (typ) Operating Supply Current
(Measured at OUT)
Low 2μA Logic-Controlled Shutdown
and 3.3V, requiring no feedback or compensation net-
work. A 75ms RESET output flag provides for power-on
reset (POR) and undervoltage detection. The MAX1947
is available in a space-saving 8-pin TDFN package.
Applications
? True Shutdown Fully Discharges Output to Ground
? Uses Only Small Ceramic Capacitors
? 75ms RESET Output Flag
Ordering Information
MP3 Players, Pagers, and CD Players
PDAs and Organizers
PART
TEMP RANGE
PIN-PACKAGE
PKG
CODE
Digital Still Cameras
Cordless Phones
MAX1947ETAxy*-T -40 ° C to +85 ° C 8 TDFN 3mm x 3mm
MAX1947ETAxy*+T -40 ° C to +85 ° C 8 TDFN 3mm x 3mm
T833-1
T833-1
Wireless Mice/Keyboards
Portable Medical Equipment
Other Battery-Powered Systems
Typical Application Circuit
* xy represents the output voltage code (e.g., 18 =1.8V).
Standard output voltages include 3.3V (33), 3.0V (30), 2.5V
(25), and 1.8V (18). Contact the factory for other output voltages
in 100mV increments between 1.8V and 3.3V; the minimum
order quantity is 25,000 units.
+ Denotes lead-free package.
Pin Configuration
V IN
+0.7V TO +V OUT
2.2 μ F
4.7 μ H
TOP VIEW
LX
V OUT
RESET
1
8
BATT
BATT
MAX1947
OUT
+1.8V, +2.5V,
+3.0V, +3.3V
10 μ F
GND
GND
2
3
MAX1947
7
6
OUT
LX
SHDN
PGND
SHDN
4
5
PGND
RESET
GND
TDFN
3mm x 3mm
A "+" SIGN WILL REPLACE THE FIRST
PIN INDICATOR ON LEAD-FREE PACKAGES.
True Shutdown is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1947ETA30+ | 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP UP 8TDFN EP - Rail/Tube 制造商:Maxim Integrated Products 功能描述:STEP-UP DC-DC CONVERTER WITH ACTIVE-LOW |
| MAX1947ETA30+T | 功能描述:直流/直流开关转换器 Step-Up w/RESET DC/DC 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 |
| MAX1947ETA30-T | 功能描述:直流/直流开关转换器 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 |
| MAX1947ETA33 | 制造商:Maxim Integrated Products 功能描述:LOW INPUT/OUTPUT VOLTAGE STEP-UP DC-DC CONVER - Rail/Tube |
| MAX1947ETA33+ | 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP UP 8TDFN EP - Rail/Tube |
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