ISL6521EVAL1

Manufacturer Part NumberISL6521EVAL1
DescriptionEVALUATION BOARD 1 ISL6521
ManufacturerIntersil
ISL6521EVAL1 datasheets
 


Specifications of ISL6521EVAL1

Main PurposeDC/DC, Step Down with LDOOutputs And Type4, Non-Isolated
Power - Output13.5WVoltage - Output1.5V, 2.5V, 3.3V, 1.8V
Current - Output5A, 1A, 1A, 120mAVoltage - Input4.5 ~ 5.5V
Regulator TopologyBuckFrequency - Switching300kHz
Board TypeFully PopulatedUtilized Ic / PartISL6521
Lead Free Status / RoHS StatusContains lead / RoHS non-compliant  
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Data Sheet
PWM Buck DC-DC and Triple Linear
Power Controller
The ISL6521 provides the power control and protection for
four output voltages in low-voltage, high-performance
applications. The IC integrates a voltage-mode PWM
controller and three linear controllers, as well as monitoring
and protection functions into a 16-lead SOIC package. The
PWM controller is intended to regulate the low voltage
supply that requires the greatest amount of current (usually
the core voltage for the FPGA, ASIC, or processor) with a
synchronous rectified buck converter. The linears are
intended to regulate other system voltages, such as I/O
(input/output) and memory circuits. Both the switching
regulator and linear voltage reference provide ±2% of static
regulation over line, load, and temperature ranges. All
outputs are user-adjustable by means of an external resistor
divider. All linear controllers can supply up to 120mA with no
external pass devices. Employing bipolar NPNs for the pass
transistors, the linear regulators can achieve output currents
of 3A or higher with proper device selection.
The ISL6521 monitors all the output voltages. The PWM
controller’s adjustable overcurrent function monitors the
output current by using the voltage drop across the upper
MOSFET’s r
. The linear regulator outputs are
DS(ON)
monitored via the FB pins for undervoltage events.
Ordering Information
PART NUMBER
TEMP. RANGE (°C)
ISL6521CBZ
0 to 70
16 Ld SOIC
(Note)
(Pb-free)
ISL6521CBZ-T
0 to 70
16 Ld SOIC
(Note)
(Pb-free)
ISL6521IBZ
-40 to 85
16 Ld SOIC
(Note)
(Pb-free)
ISL6521IBZ-T
-40 to 85
16 Ld SOIC
(Note)
(Pb-free)
ISL6521EVAL1
Evaluation Board
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.
1
February 8, 2005
Features
• Provides 4 Regulated Voltages
- Switching Regulator 20A Capable
- Three Linear Regulators
- Capable of 120mA
- Capable of up to 3A with an External Transistor
• Externally Resistor-Adjustable Outputs
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast PWM Converter Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
- All Outputs: ±2% Over Temperature
• Overcurrent Fault Monitors
- Switching Regulator Does Not Require Extra Current
Sensing Element, Uses MOSFET’s r
• Small Converter Size
- 300kHz Constant Frequency Operation
- Small External Component Count
• Commercial and Industrial Temperature Range Support
• Pb-free Available (RoHS Compliant)
Applications
PKG.
• FPGA and PowerPC
PACKAGE
DWG. #
• General purpose, low voltage power supplies
M16.15
Related Literature
M16.15
• Technical Support Document AG0001, “Power
Management Application Guide for Xilinx FPGAs”
M16.15
• Technical Support Document AG0002, “Power
Management Application Guide for Altera FPGAs”
M16.15
• Technical Support Document AG0005, “Power
Management Application Guide for Actel FPGAs”
Pinout
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
ISL6521
FN9148.2
DS(ON)
-based boards
ISL6521 (SOIC)
TOP VIEW
DRIVE2
1
16
FB3
FB2
2
15
DRIVE3
FB4
FB
3
14
COMP
13
DRIVE4
4
GND
5
12
OCSET
PHASE
6
11
VCC
BOOT
7
10
LGATE
UGATE
8
9
PGND
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.

ISL6521EVAL1 Summary of contents

  • Page 1

    ... ISL6521IBZ-T - SOIC (Note) (Pb-free) ISL6521EVAL1 Evaluation Board 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

    Block Diagram VCC EA3 - DRIVE3 + EA4 x 0.70 + DRIVE4 - + 0.8V - FB4 INHIBIT/SOFT-START + DRIVE2 - EA2 FB2 GND OSCILLATOR FB3 - + UV3 + - UV4 SOFT-START AND FAULT LOGIC + - UV2 + ...

  • Page 3

    Typical Applications High Output Current PWM Converter With Simple Triple Linears Regulators +5V V OUT2 2.5V 120mA + C OUT2 Rs2 V OUT3 1.8V 120mA + C OUT3 Rs3 V OUT4 3.3V 120mA + C OUT4 Rs4 High Output Current ...

  • Page 4

    Absolute Maximum Ratings UGATE, BOOT GND - 0.3V to 15V VCC, PHASE . . ...

  • Page 5

    Functional Pin Descriptions VCC (Pin 11) Provide a well decoupled 5V bias supply for the IC to this pin. This pin also provides the gate bias charge for the lower MOSFET controlled by the PWM section of the IC, as ...

  • Page 6

    As the internal soft-start voltage increases, the pulse-width on the PHASE pin increases to reach its steady-state duty cycle at time T2. Also at time T2, the error amplifier references of the linear controllers, ...

  • Page 7

    The OC trip point varies with MOSFET’s r temperature variations. To avoid overcurrent tripping in the normal operating load range, determine the R resistor from the equation above with: 1. The maximum r at the highest junction temperature. DS(ON) 2. ...

  • Page 8

    V DRIVER1 OSC PWM COMP SYNC - DRIVER + ∆ V OSC E/A 0.8V ERROR AMP DETAILED COMPENSATION COMPONENTS COMP ISL6521 0.8V FIGURE 5. VOLTAGE-MODE BUCK CONVERTER ...

  • Page 9

    The diode should be placed as close to the FB pin as possible to minimize stray capacitance to this pin. Upon turn-off of the pull-up device, the respective output undergoes a soft-start cycle, bringing the output ...

  • Page 10

    Component Selection Guidelines Output Capacitor Selection The output capacitors for each output have unique requirements. In general, the output capacitors should be selected to meet the dynamic load regulation requirements. Additionally, the PWM converters require an output capacitor to filter ...

  • Page 11

    Transistors Selection/Considerations The ISL6521 can employ external transistors. Two N-channel MOSFETs are used in the synchronous-rectified buck topology of PWM converter. The linear controllers can each drive an NPN bipolar transistor as a pass element. All these ...

  • Page 12

    ... Sumida CDEP134 15A 1.6µH Sumida CDEP134 20A 0.5µH Pulse PG0006.601 12 ISL6521 Intersil’s portfolio of multiple output controllers continues to expand with new selections to better fit our customer’s ), the needs. Refer to our website for updated information: I/O ) www.intersil.com MEMORY + C1 ...

  • Page 13

    ... 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 ...