ISL8502EVAL1Z Intersil, ISL8502EVAL1Z Datasheet

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ISL8502EVAL1Z

Manufacturer Part Number
ISL8502EVAL1Z
Description
EVALUATION BOARD FOR ISL8502
Manufacturer
Intersil
Datasheets

Specifications of ISL8502EVAL1Z

Main Purpose
DC/DC, Step Down
Outputs And Type
2, Non-Isolated
Voltage - Output
2.5V, 2.5V
Current - Output
2.5A. 2.5A
Voltage - Input
4.5 ~ 14V
Regulator Topology
Buck
Frequency - Switching
500kHz
Board Type
Fully Populated
Utilized Ic / Part
ISL8502
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
2A Synchronous Buck Regulator with
Integrated MOSFETs
The ISL8502 is a synchronous buck controller with internal
MOSFETs packaged in a small 4mmx4mm QFN package.
The ISL8502 can support a continuous load of 2A and has a
very wide input voltage range. With the switching MOSFETs
integrated into the IC, the complete regulator footprint can
be very small and provide a much more efficient solution
than a linear regulator.
The ISL8502 is capable of stand alone operation or it can be
used in a master slave combination for multiple outputs that
are derived from the same input rail. Multiple slave channels
(up to six) can be synchronized. This method minimizes the
EMI and beat frequencies effect with multi-channel
operation.
The switching PWM controller drives two internal N-Channel
MOSFETs in a synchronous-rectified buck converter
topology. The synchronous buck converter uses
voltage-mode control with fast transient response. The
switching regulator provides a maximum static regulation
tolerance of
The output is user-adjustable by means of external resistors
down to 0.6V.
The output is monitored for undervoltage events. The
switching regulator also has overcurrent protection. Thermal
shutdown is integrated. The ISL8502 features a bi-directional
Enable pin that allows the part to pull the enable pin low
during fault detection.
Pinout
PGOOD
SYNCH
SGND
M/S
EN
FS
±
1% over line, load, and temperature ranges.
1
2
3
4
5
6
24
7
23
8
(24 LD QFN)
TOP VIEW
ISL8502
22
9
®
GND
25
1
10
21
11
20
Data Sheet
12
19
18
17
16
15
14
13
VIN
PHASE
PHASE
PHASE
PHASE
PGND
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Up to 2A Continuous Output Current
• Integrated MOSFETs for Small Regulator Footprint
• Adjustable Switching Frequency, 500kHz to 1.2MHz
• Tight Output Voltage Regulation,
• Wide Input Voltage Range, 5V
• Wide Output Voltage Range, from 0.6V
• Simple Single-Loop Voltage-Mode PWM Control Design
• Input Voltage Feed-Forward for Constant Modulator Gain
• Fast PWM Converter Transient Response
• Lossless r
• Undervoltage Detection
• Integrated Thermal Shutdown Protection
• Power-Good Indication
• Adjustable Soft-Start
• Start-Up with Pre-Bias Output
• Pb-free (RoHS Compliant)
Applications
• Point of Load Applications
• Graphics Cards - GPU and Memory Supplies
• ASIC Power Supplies
• Embedded Processor and I/O supplies
• DSP Supplies
Ordering Information
ISL8502IRZ*
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination finish,
which is 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.
Protection
NUMBER
(Note)
PART
All other trademarks mentioned are the property of their respective owners.
June 29, 2010
Copyright © Intersil Americas Inc. 2007, 2008, 2010. All Rights Reserved
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
DS(ON)
85 02IRZ
MARKING
PART
High Side and Low Side Overcurrent
-40 to +85
RANGE
TEMP.
(°C)
±
10% or 5.5V to 14V
±
1% Over-Temperature
24 Ld 4x4 QFN L24.4x4D
PACKAGE
(Pb-free)
ISL8502
FN6389.2
DWG. #
PKG.

Related parts for ISL8502EVAL1Z

ISL8502EVAL1Z Summary of contents

Page 1

... High Side and Low Side Overcurrent DS(ON) TEMP. PART RANGE PACKAGE MARKING (°C) (Pb-free) 85 02IRZ - 4x4 QFN L24.4x4D | Intersil (and design registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2007, 2008, 2010. All Rights Reserved PKG. DWG. # ...

Page 2

Block Diagram PVCC VIN SERIES REGULATOR SGND EN SYNCH CLOCK AND M/S OSCILLATOR GENERATOR FS VCC SS PVCC POR 30μA MONITOR BIAS FAULT MONITORING VOLTAGE MONITOR 0.6V REFERENCE FB COMP PGOOD VIN (x4) OC MONITOR PVCC GATE DRIVE AND ADAPTIVE ...

Page 3

Typical Application Schematics POWER GOOD ENABLE POWER GOOD ENABLE 3 ISL8502 PGOOD EN SYNCH M/S VCC ISL8502 PVCC SS FS COMP SGND FIGURE 1. STAND ALONE REGULATOR: V PGOOD EN PVCC VCC SS ISL8502 PHASE SYNCH M/S FS COMP SGND ...

Page 4

ISL8502 With Multiple Slaved Channels MASTER PVCC M/S VIN SS FS PHASE SYNCH GND ISL8502 ENABLE ISL8502 OUT1 + M/S VIN FS V OUT2 PHASE SYNCH + EN GND ISL8502 ...

Page 5

... Enable Sinking Current OSCILLATOR 5 ISL8502 Thermal Information Thermal Resistance QFN Package (Notes Maximum Junction Temperature (Plastic Package +150° +6.0V Maximum Storage Temperature Range . . . . . . . . . -65°C to +150°C Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp = 12V SYMBOL TEST CONDITIONS tied to VCC IN ...

Page 6

Electrical Specifications Refer to Block and Simplified Power System Diagrams and Typical Application Schematics. Operating Conditions Unless Otherwise Noted +25°C. (Continued) A PARAMETER PWM Frequency Ramp Amplitude Ramp Amplitude Modulator Gain Maximum Duty Cycle Maximum Duty Cycle ...

Page 7

Electrical Specifications Refer to Block and Simplified Power System Diagrams and Typical Application Schematics. Operating Conditions Unless Otherwise Noted +25°C. (Continued) A PARAMETER Negative Current Limit Undervoltage Level Thermal Shutdown Setpoint Thermal Recovery Setpoint Typical Performance Curves ...

Page 8

Typical Performance Curves 1.520 1.518 1.516 1.514 1.512 1.510 0 1 OUTPUT LOAD (A) FIGURE 7. V REGULATION vs LOAD (V OUT 2.515 2.513 14V IN 2.511 2.509 5V IN 2.507 2.505 0 1 OUTPUT LOAD (A) FIGURE 9. V ...

Page 9

Typical Performance Curves 2.0 1.8 1.6 1.4 1.2 1.0 14V IN 0.8 0.6 0.4 0.2 0 OUTPUT LOAD (A) FIGURE 13. POWER DISSIPATION vs LOAD (V 500kHz) 2.5 2.0 1.5 14V IN 1.0 0.5 0 OUTPUT ...

Page 10

Typical Performance Curves 5.2 5.1 5.0 4.9 4.8 4.7 4.6 4 100 150 I V (mA) CC FIGURE 19. V LOAD REGULATION CC 0.5µs PHASE1 5V/DIV 5V V RIPPLE OUT1 20mV/DIV FIGURE 21. MASTER TO SLAVE OPERATION PHASE1 ...

Page 11

Typical Performance Curves EN1 5V/DIV FIGURE 25. SOFT-START AT NO LOAD EN1 5V/DIV VOUT1 1V/DIV IL1 1A/DIV SS1 2V/DIV FIGURE 27. SOFT-START AT FULL LOAD PHASE1 10V/DIV V OUT1 2V/DIV SS1 2V/DIV FIGURE 29. POSITIVE OUTPUT SHORT CIRCUIT (HICCUP MODE) ...

Page 12

Typical Performance Curves PHASE1 10V/DIV IL1 1A/DIV PGOOD1 5V/DIV FIGURE 31. RECOVER FROM POSITIVE SHORT CIRCUIT Functional Pin Descriptions PGOOD (Pin 1) PGOOD is an open drain output that will pull to low if the output goes out of regulation ...

Page 13

PGND (Pins 10-13) These pins are used as the ground connection of the power train. PHASE (Pins 14-17) These pins are the PHASE node connections to the inductor. These pins are connected to the source of the control MOSFET and ...

Page 14

Overcurrent Fault Condition and the EN pin will be pulled LOW. An Overcurrent Fault Condition will result with the regulator attempting to restart in a hiccup mode with the delay between restarts being 4 soft-start periods. At the end of ...

Page 15

After the initial spike, attributable to the ESR and ESL of the capacitors, the output voltage experiences sag. This sag is a direct consequence of the amount of capacitance on the output. During the removal of the same output load, ...

Page 16

For most cases, the RMS current rating requirement for the input capacitor of a buck regulator is approximately 1/2 the DC load current. The maximum RMS current through the input capacitors ...

Page 17

20LOG ( 20LOG (V /Δ MODULATOR -20 GAIN - ESR -60 10 100 1k 10k 100k FREQUENCY (Hz) ...

Page 18

... 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 ...

Page 19

Package Outline Drawing L24.4x4D 24 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 10/06 4.00 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 19 ISL8502 ...

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