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參數(shù)資料
| 型號： | EL7556AC |
| 元件分類： | 開關(guān)穩(wěn)壓 |
| 英文描述： | Adjustable Synchronous DC:DC Switching Regulator |
| 中文描述： | 可調(diào)同步DC-DC開關(guān)穩(wěn)壓器 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 262K |
| 代理商： | EL7556AC |
Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
2000 Elantec, Inc.
EL
7556AC
General Description
The EL7556AC is an adjustable synchronous DC:DC switching regu-
lator optimized for a 5V input and 1.0-3.8V output. By combining
integrated NMOS power FETS with a fused-lead package the
EL7556AC can supply up to 6A continuous output current without the
use of external power devices or discrete heat sinks, thereby minimiz-
ing design effort and overall system cost.
On chip resistorless current sensing is used to achieve stable, highly
efficient, current-mode control. The EL7556AC also incorporates the
VCC2DET function to directly interface with the Intel P54 and P55
microprocessors. Depending on the state of VCC2DET the output
voltage is internally preset to 3.50V or a user adjustable voltage using
two external resistors. In both internal and external feedback modes
the active-high PWRGD output indicates when the regulator output is
within ±10% of the programmed voltage. An on-board sensor moni-
tors die temperature (OT) for over-temperature conditions and can be
connected directly to OUTEN to provide automatic thermal shutdown.
Adjustable oscillator frequency and slope compensation allow added
flexibility in overall system design.
Connection Diagram
1
2
3
4
16
15
14
13
5
6
7
12
11
9
8
10
20
19
18
17
24
23
22
21
EL7556AC
28
27
26
25
FB1
VSS
VHI
LX
VSSP
VIN
VDD
COSC
CSLOPE
CREF
TEST
VSSP
VCC2DET
OUTEN
OT
VSSP
CP
FB2
C2V
C4
C8
C7
D1
C10
L1
C11
R1
C 6
R5
R6
C3
0.22F
68
2.5H
1mF
150pF
220pF
0.1F
1F
68
0.1F
5
C9
660F
VOUT
D2
D3
C 5
1F
R4
R3
100
150
Connect to VSSP for
external feedback
Manufactured under U.S. Patents No. 5,723,974 and No. 5,793,126
PWRGD
VIN
C12
0.1F
C3, C4, C5, C6, C7 C8 - ceramic
C5, C11 - ceramic or tantalum
C9 - Sprague 594D337X10010R2T 2X330F
C10 - Sprague 594D337X10010R2T 3X330F
L1 - Pulse Engineering, PE-53681
D1-D4: BAT54S fast diode
D4
Features
EL7556C Pin Compatible
Improved Temperature and
Voltage Ranges
6A Continuous Load Current
Precision Internal 1% Reference
1.0V to 3.8V Output Voltage
Internal Power MOSFETs
>90% Efficiency
Synchronous Switching
Adjustable Slope Compensation
Over Temperature Indicator
Pulse by Pulse Current Limiting
Operates up to 1MHz
1.5% Typical Output Accuracy
Adjustable Oscillator w/Sync
Remote Enable/Disable
Intel P54 and P55 Compatible
VCC2DET Interface
Internal Soft Start
Applications
PC Motherboards
Local high power CPU supplies
5V to 1.0V DC-DC Conversion
Portable Electronics/Instruments
P54 and P55 Regulators
GTL+ Bus Power Supply
Ordering Information
Part No
Temp. Range
Package
Outline #
EL7556ACM -40°C to +85°C
28-Lead SOIC
MDP0027
EL7556AC
Programmable CPU Power Supply Unit
February
28,
2000
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相關(guān)代理商/技術(shù)參數(shù) |
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| EL7556ACM | 制造商:ELAN 功能描述: |
| EL7556B | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Integrated Adjustable 6 Amp Synchronous Switcher |
| EL7556BC | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:Integrated Adjustable 6 Amp Synchronous Switcher |
| EL7556BCM | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Integrated Adjustable 6 Amp Synchronous Switcher |
| EL7556BCM-T13 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Integrated Adjustable 6 Amp Synchronous Switcher |
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