DATASHEET
ISL8013A
FN7526
Rev 2.01
Dec 3, 2021
3A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator
The ISL8013A is a high efficiency, monolithic, synchronous
step-down DC/DC converter that can deliver up to 3A
Features
• High efficiency synchronous buck regulator with up to 97%
efficiency
continuous output current from a 2.8V 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.
• Power-good (PG) output with a 1ms delay
• 2.8V to 5.5V supply voltage
The ISL8013A 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 300mV dropout voltage
at 3A output current. High 1MHz pulse-width modulation
(PWM) switching frequency allows for the use of small external
components and the SYNC input enables multiple ICs to
synchronize out-of-phase to reduce ripple and eliminate beat
frequencies.
• 3% output accuracy over temperature, load, line
• 3A output current
• Start-up with prebiased output
• Internal soft-start - 1ms
• Soft-stop output discharge during disable
• 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
The ISL8013A 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.
• Internal current mode compensation
• Peak current limiting and hiccup mode short-circuit
protection
Fault protection is provided by internal hiccup mode current
limiting during short circuit and overcurrent conditions, an
output overvoltage comparator and over-temperature monitor
circuit. A power-good output voltage monitor indicates when
the output is in regulation.
• Over-temperature protection
• Small 16 Ld 4mmx4mm QFN
• Pb-Free (RoHS compliant)
The ISL8013A is offered in a space saving 4mmx4mm, Pb-free
QFN package with exposed pad leadframes for low thermal
resistance.
Applications
• DC/DC POL modules
The ISL8013A includes 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 300mV dropout voltage at 3A.
• 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
• Barcode readers
The ISL8013A offers a 1ms Power-Good (PG) timer at
power-up. When shut down, ISL8013A discharges the output
capacitor. Other features include internal soft-start, internal
compensation, overcurrent protection, and thermal shutdown.
The ISL8013A is offered in a 4mmx4mm 16 Ld QFN package
with 1mm maximum height. The complete converter occupies
2
less than 0.4in area.
FN7526 Rev 2.01
Dec 3, 2021
Page 1 of 17
© 2009 Renesas Electronics
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