EL7571CMZ Intersil, EL7571CMZ Datasheet

IC CTRLR PWM PROGRAMMABLE 20SOIC

EL7571CMZ

Manufacturer Part Number
EL7571CMZ
Description
IC CTRLR PWM PROGRAMMABLE 20SOIC
Manufacturer
Intersil
Datasheet

Specifications of EL7571CMZ

Applications
Controller, Intel Pentium® II, Pro
Voltage - Input
4.5 ~ 12.6 V
Number Of Outputs
2
Voltage - Output
1.3 ~ 3.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Programmable PWM Controller
The EL7571 is a flexible, high efficiency, current mode, PWM
step down controller. It incorporates five bit DAC adjustable
output voltage control which conforms to the Intel Voltage
Regulation Module (VRM) Specification for Pentium® II and
Pentium® Pro class processors. The controller employs
synchronous rectification to deliver efficiencies greater than
90% over a wide range of supply voltages and load
conditions. The on-board oscillator frequency is externally
adjustable, or may be slaved to a system clock, allowing
optimization of RFI performance in critical applications. In
single supply operation, the high side FET driver supports
boot-strapped operation. For maximum flexibility, system
operation is possible from either a 5V rail, a single 12V rail,
or dual supply rails with the controller operating from 12V
and the power FETs from 5V.
Pinout
ENABLE
I.D. (VID
POWER
Voltage
Q1, Q2: Siliconix, Si4410, x2
C1: Sanyo, 16MV 1000GX, 1000µF x3
C2: Sanyo, 6MV 1000GX, 1000µF x6
L1: Pulse Engineering, PE-53700, 5.1µH
L2: Micrometals, T30-26, 7T AWG #20, 1.5µH
R1: Dale, WSL-25-12, 15mΩ, x2
D1: BAV99
D2: IR, 32CTQ030
GOOD
(0:4))
1.4V
0.1µF
C3
C3 240pF
C3 240pF
10
1
2
3
4
5
6
7
8
9
OTEN
CSLOPE
COSC
REF
PWRGD
VIDO
VID1
VID2
VID3
VID4
®
GNDP
VINP
GND
HSD
LSD
VH1
VIN
CS
1
LX
FB
20
19
18
17
16
15
14
13
12
11
Data Sheet
1µF
C7
Q2
Q1
D1
C6 0.1µF
R2
5Ω
D2
1µF
C8
5.1µH
L1
C1
1000µ
F x3
1-888-INTERSIL or 321-724-7143
1.5µH
R2
5Ω
L2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1.3V to
V
3.5V
OUT
C2
1000µF
4.5V
to
12.6V
x6
Features
• Pentium® II Compatible
• 5 bit DAC Controlled Output Voltage
• Greater than 90% Efficiency
• 4.5V to 12.6V Input Range
• Dual NMOS Power FET Drivers
• Fixed frequency, Current Mode Control
• Adjustable Oscillator with External Sync. Capability
• Synchronous Switching
• Internal Soft-Start
• User Adjustable Slope Compensation
• Pulse by Pulse Current Limiting
• 1% Typical Output Accuracy
• Power Good Signal
• Output Power Down
• Over Voltage Protection
• Pb-Free Available (RoHS Compliant)
Applications
• Pentium® II Voltage Regulation Modules (VRMs)
• PC Motherboards
• DC/DC Converters
• GTL Bus Termination
• Secondary Regulation
Ordering Information
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-020C.
EL7571CM
EL7571CM-T13
EL7571CMZ
(See Note)
EL7571CMZ-T13
(See Note)
PART NUMBER
October 25, 2004
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003-2004. All Rights Reserved.
PACKAGE
20-Pin SO
20-Pin SO
20-Pin SO
20-Pin SO
(Pb-free)
(Pb-free)
TAPE AND
REEL
13”
13”
-
-
EL7571
PKG. DWG. #
FN7298.1
MDP0027
MDP0027
MDP0027
MDP0027

Related parts for EL7571CMZ

EL7571CMZ Summary of contents

Page 1

... PART NUMBER EL7571CM EL7571CM-T13 EL7571CMZ (See Note) EL7571CMZ-T13 (See Note) 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-020C ...

Page 2

Absolute Maximum Ratings (T = 25°C) A Supply Voltage ...

Page 3

DC Electrical Specifications T (Continued) PARAMETER DESCRIPTION I VID Input Pull up Current VID I OTEN Input Pull up Current OTEN AC Electrical Specifications T PARAMETER DESCRIPTION f Nominal Oscillator Frequency OSC f Clock Frequency CLK t Shutdown Delay OTEN ...

Page 4

Typical Performance Curves +12V Supply Sync Line Regulation 0.004 0.003 0.002 0.001 0 -0.001 -0.002 -0.003 13.5 13.0 12.5 12.0 V (V) IN +12V Supply Sync Load Regulation 0.04 0. 1.8V OUT V = 2.1V OUT 0.02 V ...

Page 5

Typical Performance Curves +5V Supply Sync with Schottky Load 2 3.5V OUT 1 2.8V OUT 0 1.8V OUT -0 1.3V OUT -1.5 -2 (A) OUT +5V ...

Page 6

Typical Performance Curves 5V Sync Transient Response 1 Efficiency vs Temperature 92.6 92.5 92.4 92.2 92.0 91.8 91.6 -45 -30 -15 0 Temperature (°C) Frequency vs Temperature 280 270 260 250 240 230 220 210 200 -45 -30 -15 0 ...

Page 7

Applications Information Circuit Description General The EL7571 is a fixed frequency, current mode, pulse width modulated (PWM) controller with an integrated high precision reference and a 5 bit Digital-to-Analog Converter (DAC). The device incorporates all the active circuitry required to ...

Page 8

Modern logic level power FET’s rapidly increase in resistivity ( their gate drive is reduced below 5V. To prevent DS-ON thermal damage to the power FET’s under load, with a reduced supply voltage, the system watchdog monitors the ...

Page 9

I = peak ripple current PEAK T = top switch on time input voltage switching frequency output voltage OUT I = minimum load MIN Since inductance value tends to decrease ...

Page 10

Input Capacitor buck converter, where the output current is greater than 10A, significant demand is placed on the input capacitor. Under steady state operation, the high side FET conducts only when it is switched “on” and ...

Page 11

MANUFACTURER MODEL MegaMos Mi4410 MegaMos Mip30N03A Siliconix Si4410 Fuji 2SK1388 IR IRF3205S Motorola MTB75N05HD Skottky Diode the non-synchronous scheme a flyback diode is required to provide a current path to the output when the high side power ...

Page 12

Voltage ID Code Output Voltage Settings V V ID4 ID3 ...

Page 13

Input, Boot-Strapped Non-Synchronous DC:DC Converter ENABLE 240pF C3 C4 220pF 1.4V C5 0.1µF POWER GOOD Voltage LD. (VID(0:4)) EL7571 5V VRM Bill of Materials - 5V Non Sync Solution COMPONENT MANUFACTURER C1 Sanyo C2 Sanyo C3 C4 C5, C6 ...

Page 14

Input Boot-Strapped Synchronous DC:DC Converter ENABLE 240pF C3 C4 220pF 1.4V C5 0.1µF POWER GOOD Voltage LD. (VID(0:4)) EL7571 5V VRM Bill of Materials - 5V Non Sync Solution COMPONENT MANUFACTURER C1 Sanyo C2 Sanyo C3 C4 C5, C6 ...

Page 15

Input, 12V Controller, Non-Sync Solution ENABLE 220pF C3 C4 220pF 1.4V C5 0.1µF POWER GOOD Voltage LD. (VID(0:4)) EL7571 5V VRM Bill of Materials - 5V Non Sync Solution COMPONENT MANUFACTURER C1 Sanyo C2 Sanyo C7, ...

Page 16

Input, 12V Controller, Synchronous DC:DC Converter ENABLE 330pF C3 C4 330pF 1.4V C5 0.1µF POWER GOOD Voltage LD. (VID(0:4)) EL7571 5V VRM Bill of Materials - 5V Input, 12V Controller Sync Solution COMPONENT MANUFACTURER C1 Sanyo C2 Sanyo C3 ...

Page 17

PCB Layout Considerations 1. Place the power MOSFET’s as close to the controller as possible. Failure will cause large amounts of ringing due to the parasitic inductance of the copper trace. Additionally, the parasitic capacitance of the ...

Page 18

EL7571 Top Layer Metal Bottom Layer Metal Top Layer Silkscreen 18 ...

Page 19

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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