參數(shù)資料
型號(hào)： MAX1947ETA24
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, DSO8
封裝： 3 X 3 MM, 0.80 MM HEIGHT, MO229/WEEC, EXPOSED PAD, TDFN-8
文件頁數(shù)： 6/10頁
文件大?。?/td> 817K
代理商： MAX1947ETA24
M
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.
Low Input/Output Voltage
Step-Up DC-DC Converter with
RESET
6
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
RESET
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.
2
3
GND
GND
Ground. Connect to exposed paddle.
Ground. Connect to exposed paddle.
4
SHDN
Shutdown Input. Connect to BATT or logic 1 for normal operation. Connect to GND or logic 0 for a low
quiescent-current shutdown mode.
5
PGND
Power Ground. Connect to exposed paddle.
6
LX
Inductor Connection to the Drains of the Internal N-Channel Switch and P-Channel Synchronous
Rectifier
7
OUT
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.
8
—
BATT
EP
Batter y C onnecti on. V
B A TT
i s used for the star up osci ator and to p ow er the chi p w hen V
OU T
< V
B A TT
.
Exposed Paddle. Connect to GND and PGND.
POWER-ON RESET WAVEFORMS
M
V
IN
V
OUT
V
RESET
1V/div
1V/div
1V/div
20ms/div
EXITING AND ENTERING
SHUTDOWN WAVEFORMS
M
V
OUT
V
SHDN
V
RESET
1V/div
1V/div
1V/div
20ms/div
Typical Operating Characteristics (continued)
(V
IN
= 1.5V, Circuit of Typical Application Circuit, T
A
= +25°C, unless otherwise noted.)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1947ETA25 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX1947ETA25+ 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP UP 8TDFN EP - Rail/Tube
MAX1947ETA25+T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Step-Up w/RESET DC/DC 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
MAX1947ETA25-T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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
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
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