ISL8011

1.2A Integrated FETs, High Efficiency Synchronous Buck Regulator

OVERVIEW

ISL8011 is an integrated FET, 1.2A synchronous buck regulator for general purpose point-of load applications. It is optimized for generating low output voltages down to 0.8V. The supply voltage range is from 2.7V to 5.5V allowing the use from common 3.3V or 5V supply rails and Lithium ion battery inputs. It has guaranteed minimum output current of 1.2A. 1.5MHz pulse-width modulation (PWM) switching frequency allowing the use of small external components.

The ISL8011 includes a pair of low ON-resistance P-Channel and N-Channel internal MOSFETs to maximize efficiency and minimize external component count. 100% duty-cycle operation allows less than 200mV dropout voltage at 1.2A.

The ISL8011 offers a 200ms Power-On-Reset (POR) timer at power-up. When shutdown, the ISL8011 discharges the output capacitor. Other features include internal digital soft-start, enable for power sequence, overcurrent protection, and thermal shutdown.

The ISL8011 is offered in a 10 Ld 3mmx3mm DFN package with 1mm maximum height. The complete converter occupies less than 1cm2 area.

KEY FEATURES

  • High Efficiency Synchronous Buck Regulator with Up to 95% Efficiency
  • 2.7V to 5.5V Supply Voltage
  • 1.2A Output Current
  • 100% Maximum Duty Cycle
  • Peak Current Limiting, Short Circuit Protection
  • 200ms Power-On Reset
  • 3% Output Accuracy Over-Temperature/Load/Line
  • Less than 1µA Logic Controlled Shutdown Current
  • Internal Loop Compensation
  • Internal Digital Soft-Start
  • Over-Temperature Protection
  • Enable
  • Small 10 Ld 3mmx3mm DFN
  • Pb-Free (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL8011
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)
1.2
IQ
5 mA
Switching Freq. (max) (MHz)
1.6
Switching Freq. (min) (MHz)
1.6
Max Duty Cycle (%)
100
Qualification Level
Standard
Peak Efficiency (%)
96
POR
Yes
SYNCH Capability
No
Control Type
Current Mode
Switching Frequency Range (MHz)
1.6
Can Sample
YES
Temperature Range
-40 to +85

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