EL7564 Datasheet PDF - Intersil

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EL7564
Intersil

Part Number EL7564
Description Monolithic 4 Amp DC/DC Step-Down Regulator
Page 17 Pages


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NOT RECOMM®ESNEDEEDEDLFa7Ot5aR5S4NhEeWetDESIGNS
May 9, 2005
EL7564
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°C to
+85°C temperature range.
Typical Application Diagrams
EL7564
[20-PIN SO (0.300”)]
TOP VIEW
C5
0.1µF
1 VREF
EN 20
C4
390pF
2 SGND
FB 19
R4 3 COSC PG 18
22
C3
0.22µF
4
VDD
5 VTJ
C2
2.2nF
6 PGND
VDRV 17
VHI 16
LX 15
C6
0.22µF
L1
D1
VOUT
3.3V, 4A
VIN
5V
C1
330µF
7 PGND
LX 14
8 VIN PGND 13
4.7µH
C7
330µF
R2 C10
2.37k100pF
9 STP
10 STN
PGND 12
PGND 11
R1
1k
Features
• Integrated synchronous MOSFETs and current mode
controller
• 4A 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 1MHz
• Oscillator synchronization possible
• Internal soft start
• Over voltage protection
• Junction temperature indicator
• Over temperature protection
• Under voltage lockout
• Multiple supply start-up tracking
• Power good indicator
• 20-pin SO (0.300”) package
• 28-pin HTSSOP package
• Pb-Free available (RoHS compliant)
Applications
• DSP, CPU core and IO supplies
• Logic/Bus supplies
• Portable equipment
• DC/DC converter modules
• 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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EL7564
Ordering Information
PART NUMBER
PACKAGE
TAPE & PKG. DWG.
REEL
#
EL7564CM
20-Pin SO (0.300”)
-
MDP0027
EL7564CM-T13 20-Pin SO (0.300”) 13”
MDP0027
EL7564CMZ
(See Note)
20-Pin SO (0.300”)
(Pb-free)
-
MDP0027
EL7564CMZ-T13 20-Pin SO (0.300”)
(See Note)
(Pb-free)
13”
MDP0027
EL7564CRE
EL7564CRE-T7
EL7564CRE-T13
EL7564CREZ
(See Note)
EL7564CREZ-T7
(See Note)
28-Pin HTSSOP
28-Pin HTSSOP
28-Pin HTSSOP
28-Pin HTSSOP
(Pb-free)
28-Pin HTSSOP
(Pb-free)
-
7”
13”
-
7”
MDP0048
MDP0048
MDP0048
MDP0048
MDP0048
EL7564CREZ-T13 28-Pin HTSSOP
(See Note)
(Pb-free)
13”
MDP0048
NOTE: Intersil Pb-free 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.
2 FN7297.3
May 9, 2005



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EL7564
Absolute Maximum Ratings (TA = 25°C)
Supply Voltage between VIN or VDD and GND . . . . . . . . . . . . +6.5V
VLX Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VIN +0.3V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . GND -0.3V, VDD +0.3V
VHI Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . GND -0.3V, VLX +6.5V
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . +135°
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
DC Electrical Specifications VDD = VIN = 5V, TA = TJ = 25°C, COSC = 1.2nF, Unless Otherwise Specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP
VREF
VREFTC
VREFLOAD
VRAMP
IOSC_CHG
IOSC_DIS
IVDD+VDRV
IVDD_OFF
VDD_OFF
VDD_ON
TOT
THYS
ILEAK
ILMAX
RDSON
RDSONTC
ISTP
Reference Accuracy
Reference Temperature Coefficient
Reference Load Regulation
Oscillator Ramp Amplitude
0 < IREF < 50µA
Oscillator Charge Current
Oscillator Discharge Current
VDD+VDRV Supply Current
VDD Standby Current
VDD for Shutdown
VDD for Startup
Over Temperature Threshold
0.1V < VOSC < 1.25V
0.1V < VOSC < 1.25V
VEN = 4V, FOSC = 120kHz
EN = 0
Over Temperature Hysteresis
Internal FET Leakage Current
Peak Current Limit
EN = 0, LX = 5V (low FET), LX = 0V (high FET)
FET On Resistance
Wafer level test only
RDSON Tempco
Auxiliary Supply Tracking Positive
Input Pull Down Current
VSTP = VIN / 2
1.24
-1
2
3.5
4
5
-4
1.26
50
1.15
200
8
3.5
1
135
20
30
0.2
2.5
ISTN
Auxiliary Supply Tracking Negative VSTN = VIN / 2
Input Pull Up Current
2.5
VPGP
VPGN
VPG_HI
VPG_LO
VOVP
VFB
Positive Power Good Threshold
With respect to target output voltage
Negative Power Good Threshold With respect to target output voltage
Power Good Drive High
Power Good Drive Low
Over Voltage Protection
IPG = +1mA
IPG = -1mA
Output Initial Accuracy (EL7564CM) ILOAD = 0A
Output Initial Accuracy
(EL7564CRE)
6
-14
4
0.960
0.977
10
0.975
0.992
VFB_LINE
VFB_LOAD
VFB_TC
IFB
VEN_HI
VEN_LO
IEN
Output Line Regulation
Output Load Regulation
Output Temperature Stability
Feedback Input Pull Up Current
EN Input High Level
EN Input Low Level
Enable Pull Up Current
VIN = 5V, VIN = 10%, ILOAD = 0A
0.5A < ILOAD < 4A
-40°C < TA < 85°C, ILOAD = 2A
VFB = 0V
VEN = 0
0.5
0.5
±1
100
3.2
1
-4 -2.5
MAX
1.28
5
1.5
3.9
4.35
10
60
UNIT
V
ppm/°C
%
V
µA
mA
mA
mA
V
V
°C
°C
µA
A
m
m/°C
µA
4 µA
14
-6
0.5
0.99
1.007
%
%
V
V
%
V
V
%
%
%
200 nA
4V
V
µA
3 FN7297.3
May 9, 2005



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EL7564
Closed-Loop AC Electrical Specifications
PARAMETER
DESCRIPTION
FOSC
tSYNC
MSS
tBRM
tLEB
DMAX
Oscillator Initial Accuracy
Minimum Oscillator Sync Width
Soft Start Slope
FET Break Before Make Delay
High Side FET Minimum On Time
Maximum Duty Cycle
VS = VIN = 5V, TA = TJ = 25°C, COSC = 1.2nF, Unless Otherwise Specified.
CONDITIONS
MIN TYP MAX UNIT
105 117 130 kHz
25 ns
0.5 V/ms
15 ns
150 ns
95 %
Typical Application Diagrams (Continued)
EL7654
(28-PIN HTSSOP)
TOP VIEW
C5
0.1µF
C4
390pF
R4
22
C2
2.2nF
VIN
5V
330µF
1 VREF
2 SGND
3 COSC
C3
0.22µF
4
VDD
5 VTJ
6 PGND
7 PGND
8 PGND
9 PGND
10 VIN
11 VIN
12 NC
13 STP
14 STN
EN 28
FB 27
PG 26
VDRV 25
VHI 24
LX 23
LX 22
LX 21
LX 20
LX 19
LX 18
NC 17
PGND 16
PGND 15
C6
0.22µF
L1
4.7µH
D1
C7
330µF
VOUT
3.3V, 4A
R2
2.37k
C10
100pF
R1
1k
4 FN7297.3
May 9, 2005



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