ISL8014 데이터 시트보기 (PDF) - Renesas Electronics
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ISL8014 Datasheet PDF : 17 Pages
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ISL8014
NOT RECOMMENDED FOR NEW DESIGNS
RECOMMENDED REPLACEMENT PART
ISL8014A
4A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator
DATASHEET
FN6576
Rev 4.00
November 23, 2009
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 0.4in2 area.
Features
• High Efficiency Synchronous Buck Regulator with
up to 97% Efficiency
• 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 Protection
• 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
FN6576 Rev 4.00
November 23, 2009
Page 1 of 17
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