參數(shù)資料
型號(hào)： EL7551CUZ-T13
廠商： INTERSIL CORP
元件分類(lèi)： 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： ROHS COMPLIANT, QSOP-16
文件頁(yè)數(shù)： 1/9頁(yè)
文件大小： 181K
代理商： EL7551CUZ-T13
1
FN7291.1
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
Pb-free plus anneal available (RoHS compliant)
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
47μF
V
(3.3V,1A)
V
(4.5V-5.5V)
2.37k
10μH
0.1μF
0.1μF270pF
39
10μF
ceramic
Ordering Information
PART NUMBER
PART
MARKING
PACKAGE
TAPE &
REEL
PKG.
DWG. #
EL7551CU
7551CU
16-Pin QSOP
-
MDP0040
EL7551CU-T7
7551CU
16-Pin QSOP
7”
MDP0040
EL7551CU-T13
7551CU
16-Pin QSOP
13”
MDP0040
EL7551CUZ
(See Note)
7551CUZ
16-Pin QSOP
(Pb-free)
-
MDP0040
EL7551CUZ-T7
(See Note)
7551CUZ
16-Pin QSOP
(Pb-free)
7”
MDP0040
EL7551CUZ-T13
(See Note)
7551CUZ
16-Pin QSOP
(Pb-free)
13”
MDP0040
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb
and Pb-free soldering operations. Intersil Pb-free products are MSL classified
at Pb-free peak reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.
Data Sheet
March 21, 2006
NOT RECOMMENDED FOR NEW DESIGNS
SEE EL7531 OR EL7536
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2002, 2003, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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