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參數(shù)資料
| 型號(hào)： | ML4894 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Synchronous Buck Controller For DC/DC conversion(用于DC/DC變換的同步補(bǔ)償控制器（5.9V～15V到5V變換）) |
| 中文描述： | 同步降壓控制器，用于直流/直流轉(zhuǎn)換（用于直流/直流變換的同步補(bǔ)償控制器（高于全?15V的到5V的變換）） |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大?。?/td> | 246K |
| 代理商： | ML4894 |
July 1998
ML4894
Synchronous Buck Controller
1
BLOCK DIAGRAM
FEATURES
I
Regulation to ±3% maximum
I
Fixed 5V output synchronous buck
I
Wide input voltage range (5.9V to 15V)
I
Power conversion efficiencies of >90% over 3 decades
of output current
I
Integrated antishoot-through logic
I
Shutdown control provides load isolation and minimum
sleep mode power consumption
GENERAL DESCRIPTION
The ML4894 synchronous buck controller has been
designed to provide high efficiency DC/DC conversion for
portable products. The ML4894 can deliver a fixed 5V
output from input voltages of 5.9V to 15V.
The ML4894 drives external P- and N-channel MOSFETs
in a synchronous buck topology, allowing an overall
conversion efficiency of greater than 90% over an output
current range exceeding three decades, with an output
current capability of up to 5A.
The regulator can be disabled via the
SHDN
pin. While
disabled, the output of the regulator is completely
isolated from the circuit’s input supply, and the supply
current is reduced to less than 5μA to help extend battery
life.
OSCILLATOR
ONE SHOT
2.5V
–7mV
S
R
Q
Q
SHOOT-THRU
PROTECTION
–
+
VREG
VIN
2
VFB
3
ISENSE
6
N DRV
7
P DRV
8
VIN
5
GND
VREG
4
SHDN
+
–
COMP
–
+
COMP
LINEAR
REGULATOR
SLEEP
LOGIC
VIN
VIN
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML4895 | Synchronous Buck Controller For DC/DC conversion(用于DC/DC變換的同步補(bǔ)償控制器（5.9V～15V到2.5V～4V變換）) |
| ML4900 | High Current Synchronous Buck Controller For DC/DC conversion(用于DC/DC變換的大電流同步補(bǔ)償控制器（5V到2.1V～3.5V變換）) |
| ML4901 | High Current Synchronous Buck Controller For DC/DC conversion(用于DC/DC變換的大電流同步補(bǔ)償控制器（12V到2.1V～3.5V變換）) |
| ML4902 | High Current Synchronous Buck Controller For DC/DC conversion(用于DC/DC變換的大電流同步補(bǔ)償控制器（5V到1.8V～3.5V變換）) |
| ML4903 | High Current Synchronous Buck Controller For DC/DC conversion(用于DC/DC變換的大電流同步補(bǔ)償控制器（12V到1.8V～3.5V變換）) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4894ES | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4894ES/4895ES WAF UP | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4895 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Synchronous Buck Controller |
| ML4895ES | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4895ESX | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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