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參數資料
| 型號： | ML4761 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Adjustable Output Low Voltage Boost Regulator(可調輸出低壓差的升壓穩(wěn)壓器) |
| 中文描述： | 可調輸出低電壓升壓穩(wěn)壓器（可調輸出低壓差的升壓穩(wěn)壓器） |
| 文件頁數： | 1/8頁 |
| 文件大?。?/td> | 197K |
| 代理商： | ML4761 |
July 2000
ML4761
*
Adjustable Output Low Voltage Boost Regulator
BLOCK DIAGRAM
GENERAL DESCRIPTION
The ML4761 is a boost regulator designed for DC to DC
conversion in 1 to 3 cell battery powered systems. The
combination of BiCMOS process technology, internal
synchronous rectification, variable frequency operation,
and low supply current make the ML4761 ideal for 1 cell
applications. The ML4761 is capable of start-up with input
voltages as low as 1V, and the output voltage can be set
anywhere between 2.5V and 6V by an external resistor
divider connected to the SENSE pin.
An integrated synchronous rectifier eliminates the need for
an external Schottky diode and provides a lower forward
voltage drop, resulting in higher conversion efficiency. In
addition, low quiescent battery current and variable
frequency operation result in high efficiency even at light
loads. The ML4761 requires a minimum number of
external components to build a very small adjustable
regulator circuit capable of achieving conversion
efficiencies in excess of 90%.
The circuit also contains a
RESET
output which goes low
when the IC can no longer function due to low input
voltage (UVLO).
FEATURES
I
Guaranteed full load start-up and operation at 1V input
I
Pulse Frequency Modulation and Internal Synchronous
Rectification for high efficiency
I
Minimum external components
I
Low ON resistance internal switching FETs
I
Micropower operation
I
Adjustable output voltage (2.5V to 6V)
1
+
–
+
–
5
8
3
1
2
6
L1
VREF
SENSE
V
IN
GND
UVLO
RESET
V
L
C
OUT
+
–
V
OUT
PWR
GND
*OPTIONAL
TO MICROPROCESSOR
7
C
IN
*
R1
R2
C
FF
*
V
REF
4
BOOST
CONTROL
(* Indicates Part is End Of Life as of July 1, 2000)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ML4761 / 4861 WAF UP | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4761 / 4861 WAF UP | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4761CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Adjustable Output Low Voltage Boost Regulator |
| ML4761ES | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Adjustable Output Low Voltage Boost Regulator |
| ML4761IS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Adjustable Output Low Voltage Boost Regulator |
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