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參數(shù)資料
| 型號(hào)： | ML4950 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Adjustable Output, Low Current Single Cell Boost Regulator with Detect(帶低電檢測(cè)電路的輸出可調(diào)、低電流單節(jié)電池上電升壓穩(wěn)壓器) |
| 中文描述： | 可調(diào)輸出，低電流的單電池升壓穩(wěn)壓器與檢測(cè)（帶低電檢測(cè)電路的輸出可調(diào)，低電流單節(jié)電池上電升壓穩(wěn)壓器） |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 284K |
| 代理商： | ML4950 |
1
GENERAL DESCRIPTION
The ML4950 is a low power boost regulator designed for
low voltage DC to DC conversion in single cell battery
powered systems. The maximum switching frequency can
exceed 100kHz, allowing the use of small, low cost
inductors.
The combination of integrated synchronous rectification,
variable frequency operation, and low supply current
make the ML4950 ideal for single cell applications. The
ML4950 is capable of start-up with input voltages as low
as 1V, and the output voltage can be set anywhere
between 2V and 3V.
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 ML4950 requires a minimum number of
external components and is 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, or when the DETECT input drops below 200mV.
FEATURES
I
Guaranteed full load start-up and operation at 1V input
I
Pulse Frequency Modulation (PFM) 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 (2V to 3V)
I
Low battery detect
BLOCK DIAGRAM
July 2000
ML4950
Adjustable Output, Low Current
Single Cell Boost Regulator with Detect
VREF
VOUT
VL
5
SENSE
3
VIN
1
DETECT
4
PWR
GND
8
6
RESET
VREF
–
+
+
–
S
R
Q
Q
5μs
ONE SHOT
START-UP
REFERENCE
GND
2
VREF
+
COMP
–
7
FEATURING
Extended Com-20C to 70C
for Portable Handheld Equipment
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| ML4961 | Adjustable Output Low Voltage Boost Regulator with Detect(帶低電檢測(cè)電路的輸出可調(diào)、低電流單節(jié)電池上電升壓穩(wěn)壓器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4950 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4950CS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ML4950ES | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Adjustable Output, Low Current Single Cell Boost Regulator with Detect |
| ML4961 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Adjustable Output Low Voltage Boost Regulator with Detect |
| ML4961CS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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