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參數資料
| 型號： | EL7551CU |
| 廠商： | ELANTEC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Monolithic 1Amp DC:DC Step-down Regulator |
| 中文描述： | 2 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | QSOP-16 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 149K |
| 代理商： | EL7551CU |
1
FN7291
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL7551
Monolithic 1Amp DC:DC Step-down
Regulator
The EL7551 is an integrated,
synchronous step-down regulator with
output voltage adjustable from 1.0V to
3.8V. It is capable of delivering 1A continuous current at up
to 95% efficiency. The EL7551 operates at a constant
frequency pulse width modulation (PWM) mode, making
external synchronization possible. Patented on-chip
resistorless current sensing enables current mode control,
which provides cycle-by-cycle current limiting, over-current
protection, and excellent step load response. The EL7551 is
available in a fused-lead 16-pin QSOP package. With proper
external components, the whole converter fits into a less
than 0.4 in
2
area. The minimal external components and
small size make this EL7551 ideal for desktop and portable
applications.
The EL7551 is specified for operation over the -40°C to
+85°C temperature range.
Pinout
EL7551
(16-PIN QSOP)
TOP VIEW
Features
Integrated synchronous MOSFETs and current mode
controller
1A continuous output current
Up to 95% efficiency
4.5V to 5.5V input voltage
Adjustable output from 1V to 3.8V
Cycle-by-cycle current limit
Precision reference
±0.5% load and line regulation
Adjustable switching frequency to 1.2MHz
Oscillator synchronization possible
Internal soft start
Over temperature protection
Under voltage lockout
16-pin QSOP package
Applications
DSP, CPU Core and IO Supplies
Logic/Bus Supplies
Portable Equipment
DC:DC Converter Modules
GTL + Bus Power Supply
Manufactured under U.S. Patent No. 57,323,974
1
2
3
4
16
15
14
13
5
6
7
12
11
10
8
9
SGND
COSC
VDD
PGND
PGND
VIN
VIN
EN
PGND
VREF
FB
VDRV
LX
LX
VHI
PGND
R3
R2
L1
C3
C4
C1
C5
R1
1k
C6
0.1μF
C
7
V
(3.3V,1A)
V
(4.5V-5.5V)
2.37k
10μH
0.1μF
0.1μF270pF
39
10μF
ceramic
Ordering Information
PART NUMBER
PACKAGE
TAPE & REEL
PKG. NO.
EL7551CU
16-Pin QSOP
-
MDP0040
EL7551CU-T7
16-Pin QSOP
7”
MDP0040
EL7551CU-T13
16-Pin QSOP
13”
MDP0040
Data Sheet
January 24, 2002
NOT RECOMMENDED FOR NEW DESIGNS
SEE EL7531 OR EL7536
相關PDF資料 |
PDF描述 |
|---|---|
| EL7551CUZ | Monolithic 1Amp DC:DC Step-down Regulator |
| EL7551CUZ-T13 | Monolithic 1Amp DC:DC Step-down Regulator |
| EL7551CUZ-T7 | Monolithic 1Amp DC:DC Step-down Regulator |
| EL7554(中文) | Monolithic 4 Amp DC-DC Step-Down Regulator(單片4A DC-DC降壓穩(wěn)壓器) |
| EL7554IREZ-T13 | Monolithic 4 Amp DC-DC Step-Down Regulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| EL7551CU-T13 | 制造商:Intersil 功能描述:1A INTEGRTD DC:DC CN VRTR |
| EL7551CU-T7 | 制造商:Intersil 功能描述:1A INTEGRTD DC:DC CN VRTR |
| EL7551CUZ | 功能描述:直流/直流開關轉換器 EL7551CUZ 1A INTEGR DC:DC CNVRTR RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| EL7551CUZ-T13 | 功能描述:直流/直流開關轉換器 EL7551CUZ 1A INTEGR DC:DC CNVRTR RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| EL7551CUZ-T7 | 功能描述:直流/直流開關轉換器 EL7551CUZ 1A INTEGR DC:DC CNVRTR RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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