ISL78310

High Performance 1A LDO

OVERVIEW

The ISL78310 is a low dropout voltage, high-current, single output LDO specified for 1A output current. This part operates from input voltages down to 2.2V and up to 6V. The part offers fixed and external resistor adjustable output voltages from 0.8V to 5V. Custom voltage options are available upon request.

For applications that desire to set the in-rush current to less than the current limit of the part, or for applications that require turn-on time control, an external capacitor can be placed on the soft-start pin for maximum control. A supply-independent ENABLE signal allows the part to be placed into a low quiescent current shutdown mode. Sub-micron CMOS process is used for this product family to deliver best-in-class analog performance and overall value.

This CMOS LDO consumes significant lower quiescent (ground pin) current as a function of load over bipolar LDOs, which translates into higher efficiency and packages with smaller footprints. Quiescent current is optimized to achieve a very fast load transient response.

The ISL78310 is AEC-Q100 rated. The ISL78310 is rated for the automotive temperature range (-40°C to +125°C).

KEY FEATURES

  • 2.2V to 6V input supply
  • 130mV dropout voltage typical (at 1A)
  • Fast load transient response
  • ±0.2% initial VOUT accuracy
  • Adjustable in-rush current limiting
  • 58dB typical PSRR
  • 63µVRMS output noise at VOUT = 1.8V
  • Power-good feature
  • 500mV feedback voltage
  • Supply-independent 1V enable input threshold
  • Short-circuit current protection
  • 1A peak reverse current
  • Over-temperature shutdown
  • Any cap stable with minimum 10µF ceramic
  • ±1.8% guaranteed VOUT accuracy for junction temperature range from -40°C to +125°C
  • Available in a 10 Lead DFN package
  • Pb-free (RoHS compliant)
  • AEC-Q100 qualified

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL78310
Basic Information
Production Status
Mass Production
Input Voltage Min (V)
2.2
Input Voltage Max (V)
6
External Bias
No
Output Voltage Min (V)
0.8
Output Voltage Max (V)
5
Fixed Output Voltage Option
Yes
O/P Voltage Accuracy (%)
±1.8
Output Current 1 Max (A)
1
PSRR (dB)
72
Qualification Level
Automotive
Noise (μVRMS 10Hz to 100kHz)
63
Drop Out Voltage Typ (mV)
130 @ 1A
Enable/Shutdown
Yes
PGOOD Output
Yes
Input Voltage Range (V)
2.2 to 6.0
Output Voltage Range (V)
0.8 to 5.0
Temperature Range
-40 to +125

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