ISL8014EVAL2Z Intersil, ISL8014EVAL2Z Datasheet

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ISL8014EVAL2Z

Manufacturer Part Number
ISL8014EVAL2Z
Description
EVALUATION BOARD FOR ISL8014
Manufacturer
Intersil
Datasheets

Specifications of ISL8014EVAL2Z

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
1.8V
Current - Output
4A
Voltage - Input
2.7 ~ 5.5V
Regulator Topology
Buck
Frequency - Switching
1MHz
Board Type
Fully Populated
Utilized Ic / Part
ISL8014
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-

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Part Number
Manufacturer
Quantity
Price
Part Number:
ISL8014EVAL2Z
Manufacturer:
Intersil
Quantity:
2
4A Low Quiescent Current 1MHz High Efficiency
Synchronous Buck Regulator
ISL8014
The ISL8014 is a high efficiency, monolithic, synchronous
step-down DC/DC converter that can deliver up to 4A
continuous output current from a 2.7V to 5.5V input
supply. It uses a current control architecture to deliver
very low duty cycle operation at high frequency with fast
transient response and excellent loop stability.
The ISL8014 integrates a pair of low ON-resistance
P-Channel and N-Channel internal MOSFETs to maximize
efficiency and minimize external component count. The
100% duty-cycle operation allows less than 400mV
dropout voltage at 4A output current. High 1MHz
pulse-width modulation (PWM) switching frequency
allows the use of small external components and SYNC
input enables multiple ICs to synchronize out of phase to
reduce ripple and eliminate beat frequencies.
The ISL8014 can be configured for discontinuous or
forced continuous operation at light load. Forced
continuous operation reduces noise and RF interference
while discontinuous mode provides high efficiency by
reducing switching losses at light loads.
Fault protection is provided by internal hiccup mode
current limiting during short circuit and overcurrent
conditions, an output over voltage comparator and
over-temperature monitor circuit. A power good output
voltage monitor indicates when the output is in
regulation.
The ISL8014 is offered in a space saving 4x4 QFN lead
free package with exposed pad lead frames for low
thermal.
The ISL8014 offers a 1ms Power-Good (PG) timer at
power-up. When shutdown, ISL8014 discharges the
output capacitor. Other features include internal
soft-start, internal compensation, overcurrent protection,
and thermal shutdown.
The ISL8014 is offered in a 16 Ld 4mmx4mm QFN
package with 1mm maximum height. The complete
converter occupies less than 0.4in
November 23, 2009
FN6576.4
1
2
area.
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• High Efficiency Synchronous Buck Regulator with up
• Power-Good (PG) Output with a 1ms Delay
• 2.7V to 5.5V Supply Voltage
• 3% Output Accuracy Over-Temperature/Load/Line
• 4A Output Current
• Pin Compatible to ISL8013
• Start-up with Pre-Biased Output
• Internal Soft-Start - 1ms
• Soft-Stop Output Discharge During Disabled
• 35µA Quiescent Supply Current in PFM Mode
• Selectable Forced PWM Mode and PFM Mode
• External Synchronization up to 4MHz
• Less than 1µA Logic Controlled Shutdown Current
• 100% Maximum Duty Cycle
• Internal Current Mode Compensation
• Peak Current Limiting and Hiccup Mode Short Circuit
• Over-Temperature Protection
• Small 16 Ld 4mmx4mm QFN
• Pb-Free (RoHS Compliant)
Applications
• DC/DC POL Modules
• µC/µP, FPGA and DSP Power
• Plug-in DC/DC Modules for Routers and Switchers
• Portable Instruments
• Test and Measurement Systems
• Li-ion Battery Powered Devices
• Small Form Factor (SFP) Modules
• Bar Code Readers
to 97% Efficiency
Protection
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. 2007-2009. All Rights Reserved

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ISL8014EVAL2Z Summary of contents

Page 1

... Bar Code Readers CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Intersil (and design registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2007-2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ...

Page 2

... 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. ...

Page 3

Typical Application INPUT 2. 22µF Block Diagram SOFT Soft START SHUTDOWN EN 0.8V BANDGAP 3pF VFB 6k 0.736V PG SGND 0.2V 3 ISL8014 LX VIN VDD PGND R1 ISL8014 100k PG VFB EN SYNCH SGND ...

Page 4

... Thermal Resistance (Typical, Notes 4, 5)θ 4x4 QFN Package . . . . . . . Junction Temperature Range . . . . . . . . . . -55°C to +125°C Storage Temperature Range . . . . . . . . . . . -65°C to +150°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp = -40°C to +85° 3.6V VDD, unless otherwise noted. Typical values are +25°C. Boldface limits apply over the operating temperature range, ...

Page 5

Electrical Specifications Unless otherwise noted, all parameter limits are established over the recommended operating conditions and the typical specification are measured at the following conditions -40°C to +85°C. (Continued) PARAMETER SYMBOL LX P-Channel MOSFET ON-Resistance N-Channel MOSFET ON-Resistance ...

Page 6

Typical Operating Performance 100 90 2.5V OUT-PWM 80 1.8V OUT-PWM 1. 0.0 0.5 1.0 1.5 2.0 2.5 OUTPUT LOAD (A) FIGURE 3. EFFICIENCY vs LOAD (1MHz 3.3 V 100 90 80 2.5V OUT-PWM 1.8V OUT-PWM 70 ...

Page 7

Typical Operating Performance 0.25 0.20 0.15 0.10 0.05 0 2.0 2.5 3.0 3.5 4.0 V (V) IN FIGURE 9. POWER DISSIPATION WITH NO LOAD vs V (PFM V = 1.8V) IN OUT 1.55 1.54 3.3V IN-PFM 1.53 1.52 1.51 1.50 ...

Page 8

Typical Operating Performance 1.830 1.820 4A LOAD PWM 1.810 1.800 1.790 1.780 1.770 1.760 1.750 2.0 2.5 3.0 3.5 4.0 INPUT VOLTAGE (V) FIGURE 15. OUTPUT VOLTAGE REGULATION vs VIN (PWM V = 1.8 ) OUT LX 2V/DIV V RIPPLE ...

Page 9

Typical Operating Performance LX 2V/DIV V OUT IL 1A/DIV FIGURE 21. MODE TRANSITION DCM TO CCM LX 2V/DIV V RIPPLE 50mV/DIV OUT IL 1A/DIV FIGURE 23. LOAD TRANSIENT (PFM) EN 5V/DIV V 0.5V/DIV OUT IL 1A/DIV PG 5V/DIV FIGURE 25. ...

Page 10

Typical Operating Performance EN 2V/DIV V 0.5V/DIV OUT IL 2A/DIV PG 5V/DIV FIGURE 27. SOFT-START AT FULL LOAD LX 2V/DIV SYNCH 2V/DIV V RIPPLE 20mV/DIV OUT IL 1A/DIV FIGURE 29. STEADY STATE OPERATION AT NO LOAD WITH FREQUENCY = 2MHz ...

Page 11

Typical Operating Performance IL 2A/DIV FIGURE 33. OUTPUT SHORT CIRCUIT 5.500 5.375 5.250 5.125 5.000 4.875 4.750 4.625 4.500 FIGURE 35. OUTPUT CURRENT LIMIT vs TEMPERATURE Theory of Operation The ISL8014 is a step-down switching regulator optimized for battery-powered handheld ...

Page 12

The error amplifier is a transconductance amplifier that converts the voltage error signal to a current output. The voltage loop is internally compensated with the 27pF and 390kΩ RC network. The maximum EAMP voltage output is ...

Page 13

Short-Circuit Protection The short-circuit protection SCP comparator monitors the VFB pin voltage for output short-circuit protection. When the VFB is lower than 0.2V, the SCP comparator forces the PWM oscillator frequency to drop to 1/3 of the normal operation value. ...

Page 14

... 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. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries ...

Page 15

... EN low until Vin is greater than 2.5V." 08/04/08 FN6576.2 Added to VIN, VDD and LX in Abs Max Rating (DC (20ms). Added Intersil Standards as follows: Added to Electrical Specs conditions at top over-temp note. Updated POD L16.4x4 to latest version. 12/20/07 FN6576.1 Removed the MIN and MAX value of " ...

Page 16

Package Outline Drawing L16.4x4 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 6, 02/08 4.00 6 PIN 1 INDEX AREA 0.15 (4X) TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 16 ...

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