A8586 Datasheet Text
A8586, A8586-1, A8586-2
Wide Input Voltage, Adjustable Frequency, 3.5 Amp Buck Regulator
Features
AND BENEFITS
- Automotive AEC-Q100 qualified
- Supply voltage from 3.8 to 36 V
- Output voltage adjustable from 0.8 to 30 V
- Maximized duty cycle for low dropout operation
- Low 30 μA operational quiescent current
- 150 mΩ integrated MOSFET switch
- Programmable switching frequency up to 4 MHz
- Improved EMC with frequency dithering (A8586 and
A8586-2) and controlled switch node rise and fall times
- Ceramic capacitor stable
- Internal soft-start
- Overcurrent protection
APPLICATIONS
- High-voltage power conversion
- Automotive systems
- Industrial power system
- Distributed power systems
- Battery-powered systems
PACKAGES:
10-Pin DFN with Exposed Thermal Pad (suffix EJ)
8-Pin SOIC with Exposed Thermal Pad (suffix LJ)
Not to scale
DESCRIPTION
The A8586 is a high frequency step-down switching regulator with an integrated high-side power MOSFET. It provides up 3.5 A output current. The A8586 can achieve fast transient response using current-mode control and simple external pensation.
The wide input range of 3.8 to 36 V makes the A8586 suitable for a wide range of step-down applications, including those in an automotive input environment. Battery-driven applications benefit from the low 30 μA operational quiescent current.
The A8586 maintains high efficiency across a wide load range by the use of pulse-frequency modulation (PFM) as the load reduces. This in turn reduces switching and gate driver losses at light load. A8586-1 and A8586-2 are options that disable the PFM function. A8586-1 also disables the dithering feature. These can be useful when low output ripple and minimum output capacitance is required....