ISL8012

2A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator

Product Status: Mass Production

OVERVIEW

The ISL8012 is a high efficiency, monolithic, synchronous step-down DC/DC converter that can deliver up to 2A continuous output current from a 2.7V 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 ISL8012 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 240mV dropout voltage at 2A output current. High 1MHz pulse width modulation (PWM) switching frequency allows the use of small external components.

The ISL8012 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 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 ISL8012 offers a 1ms Power-good (PG) timer at power-up. When shutdown, ISL8012 discharges the output capacitor. Other features include internal soft-start, internal compensation, overcurrent protection, and thermal shutdown.

The ISL8012 is offered in a space saving 3mmx3mm 10 Ld DFN package lead free package with exposed pad lead frames for low thermal. The complete converter occupies less than 0.35in2 area.

KEY FEATURES

  • High Efficiency Synchronous Buck Regulator with up to 95% Efficiency
  • Power-Good (PG) Output with a 1ms Delay
  • 2.7V to 5.5V Supply Voltage
  • 3% Output Accuracy Over-Temperature/Load/Line
  • 2A Guaranteed Output Current
  • Start-up with Pre-Biased Output
  • Internal Soft-Start - 1ms
  • Soft-Stop Output Discharge During Disabled
  • 40µA Quiescent Supply Current in PFM Mode
  • Selectable Forced PWM Mode and PFM Mode
  • 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 10 Ld 3mmx3mm: DFN
  • Pb-Free (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL8012
Basic Information
Production Status
Mass Production
Topology
Buck
# of Outputs
1
Input Voltage Min (V)
2.7
Input Voltage Max (V)
5.5
Output Voltage Min (V)
0.8
Output Voltage Max (V)
5.5
Output Current Max (A)
2
IQ
40 µA
Switching Freq. (max) (MHz)
1
Switching Freq. (min) (MHz)
1
Max Duty Cycle (%)
100
Qualification Level
Standard
Peak Efficiency (%)
95
POR
Yes
BOM Total Footprint (mm2)
225.8
SYNCH Capability
No
Control Type
Current Mode
Switching Frequency Range (MHz)
1
Temperature Range
-40 to +85

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Find out how the highly efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails.
9:50
This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR, ISL9120IR, for battery-powered portable devices.
3:57
This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.
3:02
Find out how the highly efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails.
9:50
This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR, ISL9120IR, for battery-powered portable devices.
3:57
This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.

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