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