ISL78214

4A Low Quiescent Current High Efficiency Synchronous Buck Regulator

Product Status: Mass Production

OVERVIEW

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.

KEY 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

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL78214
Basic Information
Production Status
Mass Production
# of Outputs
1
Topology [Rail 1]
Buck
Input Voltage Min (V) [Rail 1]
2.8
Input Voltage Max (V) [Rail 1]
5.5
Output Voltage Min (V) [Rail 1]
0.8
Output Voltage Max (V) [Rail 1]
5.5
Output Current Max (A) [Rail 1]
4
IQ [Rail 1]
35 µA
Switching Freq. (max) (MHz)
1
Switching Freq. (min) (MHz)
1
Max Duty Cycle (%)
100
Qualification Level
Automotive
Peak Efficiency (%)
97
POR
No
BOM Total Footprint (mm2)
258.1
Control Type
Current Mode
Switching Frequency Range (MHz)
1
Can Sample
YES
Temperature Range
-40 to +105

Design Resources and Tools

Simulation Tool

iSim Online Designer

Select supporting components, build your schematic and validate your power management and op amp designs.

Simulate

Selection Tool

 PowerCompass Online Tool

The PowerCompass™ tool helps you find Renesas parts that match your requirements, performs system analysis & more.

Design

Cross Reference

Intersil Cross Reference

Cross-reference based on data from industry sources. Support for the online tool has been discontinued, but the data is still available.

Download

Knowledge Base

Automotive IC FAQs

Find answers to common questions, support articles and development hints.


FAQs

Related Boards and Kits


Related Videos

11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.
2:13
Advanced automotive power management solutions can improve power efficiency by as much as 5 percent.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.
2:13
Advanced automotive power management solutions can improve power efficiency by as much as 5 percent.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.
2:13
Advanced automotive power management solutions can improve power efficiency by as much as 5 percent.

Action Needed