參數(shù)資料
型號(hào)： MAX757
廠商： Maxim Integrated Products, Inc.
元件分類： DC/DC變換器
英文描述： 3.3V/5V/Adjustable-Output, Step-Up DC-DC Converters(可調(diào),高效率,步升DC-DC變換器)
中文描述： 3.3V/5V/可調(diào)輸出、升壓型DC-DC轉(zhuǎn)換器
文件頁(yè)數(shù)： 4/8頁(yè)
文件大?。?/td> 129K
代理商： MAX757
M
3.3V /5V /Adjustable-Output,
S tep-Up DC-DC Converters
4
_______________________________________________________________________________________
______________________________________________________________Pin Desc ription
NAME
FUNCTION
1
SHDN
2
3/5
Selects the main output voltage setting; 5V when low, 3.3V when high.
–
FB
3
REF
4
LBO
5
LBI
6
OUT
7
GND
Power Ground. Must be low impedance; solder directly to ground plane.
8
LX
1A, 0.5
N-Channel Power MOSFET Drain
1
–
2
3
4
5
6
7
8
PIN
MAX756
MAX757
Shutdown Input disables SMPS when low, but the voltage reference and low-battery com-
parator remain active.
Feedback Input for adjustable output operation. Connect to an external voltage divider
between OUT and GND.
1.25V Reference Voltage Output. Bypass with 0.22μF to GND (0.1μF if there is no external
reference load). Maximum load capability is 250μA source, 20μA sink.
Low-Battery Output. An open-drain N-channel MOSFET sinks current when the voltage at
LBI drops below +1.25V.
Low-Battery Input. When the voltage on LBI drops below +1.25V, LBO sinks current.
Connect to V
IN
if not used.
Connect OUT to the regulator output. It provides bootstrapped power to both devices,
and also senses the output voltage for the MAX756.
OUTPUT
VOLTAGE
50mV/div
V
IN
= 2.5V
HORIZONTAL = 50
μ
s/div
5V Mode
LOAD-TRANSIENT RESPONSE
OUTPUT
CURRENT
0mA to 200mA
_____________________________Typic al Operating Charac teristic s (c ontinued)
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
V
SHDN
2V/div
V
IN
= 2.5V
HORIZONTAL = 5ms/div
5V Mode
START-UP DELAY
V
OUT
2V/div
3V
0V
5V
0V
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參數(shù)描述
MAX757C/D 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Adjustable Step-Up 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
MAX757C/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX757CPA 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.3/5/AdjV-Out Step Up 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
MAX757CPA+ 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.3/5/AdjV-Out Step Up 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
MAX757CSA 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.3/5/AdjV-Out Step Up 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
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