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參數(shù)資料
| 型號： | Si9139DG-2818 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Multi-Output, Individual On/Off Control Power-Supply Controller |
| 中文描述： | 多輸出，單獨開/關(guān)控制電源控制器 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 162K |
| 代理商： | SI9139DG-2818 |
Si9139
Vishay Siliconix
New Product
Document Number: 71841
S-22317—Rev. A, 16-Dec-02
www.vishay.com
1
Multi-Output, Individual On/Off Control Power-Supply Controller
FEATURES
Five Output 50-W, Triple Output DC-DC-Controller
Up to 95% Efficiency
3% Total Regulation (Line, Load and Temperature)
4.5-V to 30-V Input Voltage Range
Two Fixed 1.5-V, 1.8-V, 2.0-V, 2.2-V, 2.5-V, 2.8-V, 3.3-V Outputs
One Adjustable 1.24-V to 20-V Output
3.3-V Reference Output
5-V/30-mA Linear Regulator Output
Individual ON/OFF Control for A and B Outputs
300-kHz Low-Noise Fixed Frequency Operation
High Efficiency Pulse Skipping Mode Operation at Light Load
Only Three Inductors Required
No Transformer
LITTLE FOOT Optimized Output Drivers
Internal Under Voltage Lockout and Soft-Start
Minimum Number of External Control Components
28-Pin SSOP Package
Output Overvoltage Protection
Output Undervoltage Shutdown
Power-Good Output (RESET)
APPLICATIONS
Notebook and Subnotebook Computers
PDAs and Mobile Communicators
Portable Display
Multimedia Set-Top Box
Telecommunications Infrastructure
Network Equipment
Distributed Power Conversion
DESCRIPTION
The Si9139 is current-mode PWM and PSM converter
controller, with two high current, high efficiency synchronous
buck controllers and an adjustable buck-boost controller
whose output can be set between 1.24 V and 20 V with an
external resistor divider. Designed for fixed and portable
devices, it offers a total of five power outputs (three tightly
regulated dc/dc converter outputs, a precision 3.3-V reference
and a 5-V LDO output. Individually controlled power-up
sequencing, power-good signal with delay, internal frequency
compensation networks and automatic boot-strapping
simplify the system by minimizing the number of external
components
while
achieving
approaching 95%.
conversion
efficiencies
The Si9139 is available in a 28-pin SSOP package and
specified to operate over the extended commercial (-40 C to
85 C) temperature range.
FUNCTIONAL BLOCK DIAGRAM
5-V
Linear
Regulator
3.3-V
Voltage
Reference
1.5- V - 3.3-V
SMPS
A
1.8- V - 3.3-V
SMPS
B
Auxiliary SMPS
Programmable
V
IN
(4.5 V to 30 V)
0 - 6 A
V
L
(5.0 V)
V
(+3.3 V)
1.24-V to 20-V/500 mA
Adjustable
Power_Good
RESET
(Power_Good)
ON
A
ON
B
Logic Control
0 - 6 A
V
OUT
V
OUT
B
V
OUT
A
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9139DG-2818-T1 | 制造商:Vishay Siliconix 功能描述:CURRENT MODE PWM CNTRLR 2.8V/1.8V/1.24V TO 20V 1A 28SSOP - Tape and Reel |
| SI9139DG-2820 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Multi-Output, Individual On/Off Control Power-Supply Controller |
| SI9139DG-2820-T1 | 制造商:Vishay Siliconix 功能描述:CURRENT MODE PWM CNTRLR 2.8V/2V/1.24V TO 20V 1A 28SSOP - Tape and Reel |
| SI9139DG-2822 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Multi-Output, Individual On/Off Control Power-Supply Controller |
| SI9139DG-2822-T1 | 制造商:Vishay Siliconix 功能描述:CURRENT MODE PWM CNTRLR 2.8V/2.2V/1.24V TO 20V 1A 28SSOP - Tape and Reel |
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