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參數(shù)資料
| 型號(hào)： | ML4870ES-5 |
| 英文描述： | High Current Boost Regulator with Load Disconnect |
| 中文描述： | 高電流升壓穩(wěn)壓器與負(fù)載斷開(kāi) |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大小： | 211K |
| 代理商： | ML4870ES-5 |
July 2000
PRELIMINARY
ML4870
*
High Current Boost Regulator with Load Disconnect
1
GENERAL DESCRIPTION
The ML4870 is a continuous conduction boost regulator
designed for DC to DC conversion in multiple cell battery
power systems. Continuous conduction allows the
regulator to maximize output current for a given inductor.
The maximum switching frequency can exceed 200kHz,
allowing the use of small, low cost inductors. The ML4870
is capable of start-up with input voltages as low as 1.8V,
and is available in 5V and 3.3V output versions with an
output voltage accuracy of ±3%.
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 addtion, low quiescent current and variable
frequency operation result in high efficiency even at light
loads. The ML4870 requires only a few external
components to build a very small regulator capable of
achieving conversion efficiencies approaching 85%.
The SHDN input allows the user to stop the regulator from
switching, and provides complete isolation of the load
from the battery.
*Some Packages Are Obsolete
BLOCK DIAGRAM
FEATURES
I
Guaranteed full load start-up and operation at
1.8V input
I
Continuous conduction mode for high output current
I
Pulse Frequency Modulation and internal synchronous
rectification for high efficiency
I
Isolates the load from the input during shutdown
I
Minimum external components
I
Low ON resistance internal switching FETs
I
Low supply current
I
5V and 3.3V output versions
VL2
5
VOUT
6
+
–
SHUTDOWN
CONTROL
4
SHDN
VIN
2
2.4V
START-UP
3
GND
VL1
1
SYNCHRONOUS
RECTIFIER
CONTROL
BOOST
CONTROL
SHDN
+
–
+
–
8
PWR GND
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML4871CS-3 | High Current Boost Regulator |
| ML4890CS-3 | High Efficiency, Low Ripple Boost Regulator |
| ML4890ES-3 | High Efficiency, Low Ripple Boost Regulator |
| ML4890ES-5 | High Efficiency, Low Ripple Boost Regulator |
| ML4890ES-T | High Efficiency, Low Ripple Boost Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4871 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Current Boost Regulator |
| ML4871CS3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4871CS-3 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Current Boost Regulator |
| ML4871CS-5 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Current Boost Regulator |
| ML4871ES-3 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Current Boost Regulator |
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