ISL85012

12A, 3.8V to 18V Input, Synchronous Buck Regulator

Product Status: Mass Production

OVERVIEW

The ISL85012 is a highly efficient, monolithic, synchronous buck regulator that can deliver 12A of continuous output current from a 3.8V to 18V input supply. The device uses current mode control architecture with a fast transient response and excellent loop stability.

The ISL85012 integrates very low ON-resistance high-side and low-side FETs to maximize efficiency and minimize external component count. The minimum BOM and easy layout footprint are extremely friendly to space constraint systems.

The operation frequency of this device can be set using the FREQ pin: 600kHz (FREQ = float) and 300kHz (FREQ = GND). The device can also be synchronized to an external clock up to 1MHz.

Both high-side and low-side MOSFET current limit along with reverse current limit, fully protects the regulator in an overcurrent event. Selectable OCP schemes can fit various applications. Other protections, such as input/output overvoltage and over-temperature, are also integrated into the device which give required system level safety in the event of fault conditions.

The ISL85012 is offered in a space saving 15 Ld 3.5mmx3.5mm Pb-free TQFN package with great thermal performance and 0.8mm maximum height.

KEY FEATURES

  • Power input voltage range variable 3.8V to 18V
  • PWM output voltage adjustable from 0.6V
  • Up to 12A output load
  • Prebias start-up, fixed 3ms soft-start
  • Selectable fSW of 300kHz, 600kHz, and external synchronization up to 1MHz
  • Peak current mode control
  • DCM/CCM
  • Thermally compensated current limit
  • Internal/external compensation
  • Open-drain, PG window comparator
  • Output overvoltage and thermal protection
  • Input overvoltage protection
  • Integrated boot diode with undervoltage detection
  • Selectable OCP schemes
  • Hiccup OCP
  • Latch-off
  • Compact size 3.5mmx3.5mm

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL85012
Basic Information
Production Status
Mass Production
iSim Model
YES
# of Outputs
1
Topology [Rail 1]
Buck
Input Voltage Min (V) [Rail 1]
3.8
Input Voltage Max (V) [Rail 1]
18
Output Voltage Min (V) [Rail 1]
0.6
Output Voltage Max (V) [Rail 1]
5
Output Current Max (A) [Rail 1]
12
IQ [Rail 1]
3 mA
Switching Freq. (max) (MHz)
1
Switching Freq. (min) (MHz)
0.1
Max Duty Cycle (%)
100
Qualification Level
Standard
Peak Efficiency (%)
97
POR
Yes
SYNCH Capability
Yes
Control Type
Current Mode
Switching Frequency Range (MHz)
100 to 1000KHz
Temperature Range
-40 to +125

设计资源与工具

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Cross Reference

Intersil Cross Reference

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