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参数资料
| 型号： | MAX1947ETA25+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/11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 |
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
Typical Operating Characteristics (continued)
(V IN = 1.5V, Circuit of Typical Application Circuit, T A = +25°C, unless otherwise noted.)
EXITING AND ENTERING
POWER-ON RESET WAVEFORMS
MAX1947toc17
SHUTDOWN WAVEFORMS
MAX1947toc18
V IN
V RESET
V OUT
20ms/div
1V/div
1V/div
1V/div
V OUT
V RESET
V SHDN
20ms/div
1V/div
1V/div
1V/div
Pin Description
PIN
1
2
3
4
5
6
7
8
—
NAME
RESET
GND
GND
SHDN
PGND
LX
OUT
BATT
EP
FUNCTION
Active-Low Push-Pull Reset Output. RESET goes high 75ms (min) after the output voltage has
exceeded 90% of its final value. The RESET output is valid for output voltages as low as 0.9V. RESET
is driven low in shutdown.
Ground. Connect to exposed paddle.
Ground. Connect to exposed paddle.
Shutdown Input. Connect to BATT or logic 1 for normal operation. Connect to GND or logic 0 for a low
quiescent-current shutdown mode.
Power Ground. Connect to exposed paddle.
Inductor Connection to the Drains of the Internal n-Channel Switch and p-Channel Synchronous
Rectifier
Regulator Output. Bypass with 10μF ceramic capacitor to GND for full-load capability. For less than
50% of full load, a 4.7μF capacitor can be used.
Battery Connection. V BATT is used for the startup oscillator and to power the chip when V OUT < V BATT .
Exposed Paddle. Connect to GND and PGND.
Detailed Description
The MAX1947 compact step-up DC-DC converter starts
up with voltages as low as 0.8V and operates with input
voltages down to 0.7V. An internal synchronous rectifier
reduces cost by eliminating the need for an external
Schottky diode and improves overall efficiency by
reducing losses in the circuit. The efficiency is further
increased with the low 70μA quiescent current and low
on-resistance of the internal n-channel MOSFET power
switch. The MAX1947 uses Maxim’s proprietary True
Shutdown circuitry, which disconnects the output from
the input in shutdown and actively discharges the
output to ground.
6
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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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