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EL7564 Datasheet

  • EL7564

  • Monolithic 4 Amp DC/DC Step-Down Regulator

  • 644.00KB

  • 17页

  • INTERSIL   INTERSIL

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NOT
N EW
FO R
D ED
4
MEN EL755
Sheet
OM SEE
Data
RE C
庐
IG
D ES
NS
EL7564
May 9, 2005
FN7297.3
Monolithic 4 Amp DC/DC Step-Down
Regulator
The EL7564 is an integrated, full-featured synchronous step-
down regulator with output voltage adjustable from 1.0V to
3.8V. It is capable of delivering 4A continuous current at up
to 95% efficiency. The EL7564 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 EL7564
features power tracking, which makes the start-up
sequencing of multiple converters possible. A junction
temperature indicator conveniently monitors the silicon die
temperature, saving the designer time on the tedious
thermal characterization. The minimal external components
and full functionality make this EL7564 ideal for desktop and
portable applications.
The EL7564 is specified for operation over the -40掳C to
+85掳C temperature range.
Features
鈥?Integrated synchronous MOSFETs and current mode
controller
鈥?4A continuous output current
鈥?Up to 95% efficiency
鈥?4.5V to 5.5V input voltage
鈥?Adjustable output from 1V to 3.8V
鈥?Cycle-by-cycle current limit
鈥?Precision reference
鈥?卤0.5% load and line regulation
鈥?Adjustable switching frequency to 1MHz
鈥?Oscillator synchronization possible
鈥?Internal soft start
鈥?Over voltage protection
鈥?Junction temperature indicator
鈥?Over temperature protection
鈥?Under voltage lockout
鈥?Multiple supply start-up tracking
鈥?Power good indicator
鈥?20-pin SO (0.300鈥? package
Typical Application Diagrams
EL7564
[20-PIN SO (0.300鈥?]
TOP VIEW
C5
0.1碌F
1 VREF
C4
390pF
R4
22鈩?/div>
2 SGND
3 COSC
C3
4 VDD
0.22碌F
5 VTJ
C2
2.2nF
V
IN
5V
C1
330碌F
6 PGND
7 PGND
8 VIN
9 STP
10 STN
EN 20
FB 19
PG 18
VDRV 17
VHI 16
LX 15
LX 14
PGND 13
PGND 12
PGND 11
C6
0.22碌F
L1
4.7碌H
C7
330碌F
D1
V
OUT
3.3V, 4A
C10
R2
2.37k鈩?100pF
R1
1k鈩?/div>
鈥?28-pin HTSSOP package
鈥?Pb-Free available (RoHS compliant)
Applications
鈥?DSP, CPU core and IO supplies
鈥?Logic/Bus supplies
鈥?Portable equipment
鈥?DC/DC converter modules
鈥?GTL + Bus power supply
Typical Application Diagrams continued on page 3
Manufactured Under U.S. Patent No. 5,7323,974
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2003, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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