ISL78213_15 Datasheet, PDF (1/16 Pages) Intersil Corporation – 3A Low Quiescent Current, High Efficiency Synchronous Buck Regulator

DATASHEET
3A Low Quiescent Current, High Efficiency
Synchronous Buck Regulator
ISL78213
The ISL78213 is a high efficiency, monolithic, synchronous
step-down DC/DC converter that can deliver up to 3A 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.
The ISL78213 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, that can be synchronized up to 4MHz with an external
clock, 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 ISL78213 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
overvoltage comparator and over-temperature monitor circuit. A
power-good output voltage monitor indicates when the output is
in regulation.
The ISL78213 is offered in a space saving 4x4 QFN lead free
package with exposed pad lead frames for low thermal
resistance.
The ISL78213 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.
The ISL78213 offers a 1ms Power-Good (PG) timer at power-up.
When shut down, ISL78213 discharges the output capacitor.
Other features include internal soft-start, internal compensation,
overcurrent protection and thermal shutdown.
The ISL78213 is offered in a 4mmx4mm 16 Ld QFN package
with 1mm maximum height. The complete converter occupies
less than 0.4in² area.
The ISL78213 is AEC-Q100 qualified. The ISL78214 is rated for
the automotive temperature range (-40°C to +105°C).
Features
• High efficiency synchronous buck regulator with up to 97%
efficiency
• Power-good (PG) output with a 1ms delay
• 2.8V to 5.5V supply voltage
• 2% 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
• 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)
• AEC-Q100 qualified
Applications
• Automotive power
• DC/DC POL modules
• µC/µP, FPGA and DSP power
Related Literature
• AN1365, “ISL8013AEVAL2Z: 3A Low Quiescent Current 1MHz
High Efficiency Synchronous Buck Regulator”
May 12, 2015
FN7550.3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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