ISL78214ARZ集成電路（IC）的穩(wěn)壓器-DC-DC開(kāi)關(guān)穩(wěn)壓器規(guī)格書PDF中文資料

The ISL78214 is a high efficiency, monolithic, synchronous

step-down DC/DC converter that can deliver up to 4A

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 ISL78214 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, that can be synchronization 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 ISL78214 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 ISL78214 is offered in a space saving 4x4 QFN lead free

package with exposed pad lead frames for low thermal.

The ISL78214 offers a 1ms Power-good (PG) timer at

power-up. When shutdown, ISL78214 discharges the output

capacitor. Other features include internal soft-start, internal

compensation, overcurrent protection and thermal shutdown.

The ISL78214 is offered in a 16 Ld 4mmx4mm QFN package

with 1mm maximum height. The complete converter occupies

less than 0.4in2 area.

The ISL78214 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

? 4A output current

? Pin compatible to ISL78213

? 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