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參數(shù)資料
| 型號： | ML4880 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Portable PC/PCMCIA Power Controller(便攜式PC/PCMCIA電源控制器) |
| 中文描述： | 便攜式電腦/ PCMCIA的電源控制器（便攜式電腦/電源控制器的PCMCIA） |
| 文件頁數(shù)： | 1/15頁 |
| 文件大?。?/td> | 164K |
| 代理商： | ML4880 |
F E A T U R IN G
Extended Commercial Temperature Range
for Portable Handheld Equipment
1
GENERAL DESCRIPTION
The ML4880 Portable PC and PCMCIA Power Controller
is a complete solution for DC/DC power conversion for
portable computing systems with single or multiple
PCMCIA slots.
The device provides two synchronous buck controllers to
implement mixed voltage systems and a flyback controller
for 12V V
PP
generation for PCMCIA slots. The flyback
architecture enables generation of high currents (150mA
or more per slot) on the 12V bus for multiple slot PCMCIA
applications.
Each regulator can be independently switched off to fully
isolate the load from the power supply. The PFM
architecture will automatically adjust switching frequency
at light loads in order to maintain power conversion
efficiencies in excess of 90% over a wide output power
range.
(* Indicates Part is End Of Life as of July 1, 2000)
FEATURES
I
Regulation to
±
3% maximum: provides 2% PCMCIA
switch matrix margin
I
Two synchronous buck controllers for 3.3/3V, 5V
generation, and a flyback for high current, 12V
generation from 5.5V to 18V input
I
Regulator power conversion efficiencies > 90%
I
Pulse frequency modulation for high efficiency
operation
I
Independent regulator shutdown for full load isolation
I
Adjustable current limit
I
Wide input voltage range (5.5V to 18V)
July 2000
ML4880
*
Portable PC/PCMCIA Power Controller
BLOCK DIAGRAM
P DRV A
N DRV A
VOUT A
2.5 – 3.5V
+
–
ISENSE A
VFB A
N DRV C
ISENSE C
PWR GND C
VFB C
VOUT C
6V – 15V
+
–
17
3
21
12
10
16
6
TO SYSTEM
POWER
MANAGEMENT
GND
VIN
SHDN C
SHDN B
SHDN A
BIAS
CIRCUITS
18
11
7
13
14
4
9
VIN
5.5 – 18V
P DRV B
N DRV B
VOUT B
4.5 – 5.0V
+
–
ISENSE B
VFB B
19
20
5
8
VIN
VIN
SHUTDOWN
LOGIC
GND
B
B
F
15
V
REG
GATE
CLAMP
24
CLAMP
23
PWR GND A
22
PWR GND B
GATE
CLAMP
CLAMP
CLAMP A
2
CLAMP B
1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4880CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Portable PC/PCMCIA Power Controller |
| ML4880ES | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Portable PC/PCMCIA Power Controller |
| ML4890 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Efficiency, Low Ripple Boost Regulator |
| ML4890CS-3 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Efficiency, Low Ripple Boost Regulator |
| ML4890CS-5 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Efficiency, Low Ripple Boost Regulator |
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