ISL97656

Integrated 4A Switch PWM Step-Up Regulator

OVERVIEW

The ISL97656 is a high frequency, high efficiency step-up voltage regulator operated at constant frequency PWM mode. With an internal 4.0A, 120mΩ MOSFET, it can deliver up to 2A output current at over 90% efficiency. The selectable 640kHz and 1.2MHz allows smaller inductors and faster transient response. An external compensation pin gives the user greater flexibility in setting frequency compensation allowing the use of low ESR Ceramic output capacitors.

When shut down, it draws <1µA of current and can operate down to 2.3V input supply. These features, along with 1.2MHz switching frequency, make it an ideal device for portable equipment and TFT-LCD displays.

The ISL97656 is available in a 10 Ld TDFN package with a maximum height of 1.1mm. The device is specified for operation over the full -40°C to +85°C temperature range.

KEY FEATURES

  • >90% Efficiency
  • 4.0A, 120mΩ Power MOSFET
  • 2.3V to 6.0V Input
  • 1.1*VIN to 25V Output
  • 640kHz/1.2MHz Switching Frequency Selection
  • Adjustable Soft-Start
  • Internal Thermal Protection
  • 0.8mm Max Height 10 Ld TDFN Package
  • Pb-Free (RoHS Compliant)
  • Halogen Free

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL97656
Basic Information
Production Status
Mass Production
iSim Model
YES
Topology
Boost
# of Outputs
1
Input Voltage Min (V)
2.3
Input Voltage Max (V)
6
Output Voltage Min (V)
1.1
Output Voltage Max (V)
24
Output Current Max (A)
2
IQ
700 µA
Switching Freq. (max) (MHz)
1.2
Switching Freq. (min) (MHz)
0.64
Max Duty Cycle (%)
-
Qualification Level
Standard
Peak Efficiency (%)
90
Switching Frequency Range (MHz)
640kHz/1.2MHz
Can Sample
YES
Temperature Range
-40 to +85

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