AS1953/63

Energy$ense™ Digital DC-DC Power Managers w/Boost Controller & Dual Synchronous Bucks

NOT RECOMMENDED FOR NEW DESIGNS

Part of the Akros AS19xx Energy$ense™ product family, the AS1963/AS1953 are highly integrated, high efficiency triple output PMICs (Power Management ICs) with integrated Boost Controller plus Dual Synchronous Buck Converters for cost and space sensitive system power applications.

Three power outputs are provided; a 3-5.5V input Synchronous Boost Controller that provides external Boost design flexibility, and, two Synchronous Buck Regulators with internal Power FETs. All three outputs provide independent delay and soft start timing control and automatically manage both standard and pre-biased power startup. Synchronous spread-spectrum clocking with external PWM clock sync capability is built in for low-noise, low-EMI multi-channel applications.

The AS1963/AS1953 are optimized for high-efficiency, cost and space constrained multi-channel applications. The device family simplifies high power Boost controller system design with a range of programmable and easy-design features, including system noise and EMI management. Both the AS1963 and AS1953 provide Hardware mode pin controlled operation, and the AS1963 also includes enhanced Software controlled features through an I²C interface.

The AS1963 & AS1953 are available in 5x5mm 32-pin QFN RoHS compliant packages.

Applications

Residential Gateways and Femto Cells
Wireless LAN & WiMAX access points/CPEs
Voice-over-IP (VoIP) phones, CCTV
Set-Top Box, PVR, DTV, LCD
Infotainment and Automotive accessories
Tablets, Thin Clients and Netbook

Features

Digitally Programmable Power

  • Output 1: High Efficiency Synchronous Boost Controller (3-5.5V input)
  • Outputs 2 & 3: High Efficiency Synchronous Buck Regulators with Integrated 2A(rms) Power FETs
  • Synchronized PWM Clocking on all Outputs (pin programmable)

Power Management

  • Pin Programmable Current Limit for each Output
  • Automatic Pre-Bias Output Startup Management
  • Per Output Enable & Soft Start Delay Timing Control
  • Multiple Soft Start Control Applications Supported
    - Independent, Ratiometric, or Coincident
  • Global PGOOD Monitoring
  • Synchronous Spread Spectrum Clocking on all PWMs
  • Input for optional External Synchronization of PWMs
  • Pin Programmable UVLO
  • Per Converter Input Current Measurement (AS1963)
  • Per Output PGOOD Monitoring (AS1963)
  • Per Output Voltage Margining (AS1963)
  • Per Output CCM/DCM Control (AS1963)
  • Over-Temp Software Monitor (AS1963)
  • 5V µC-Compatible I²C Interface (AS1963)

EMC Compliance and Protection

  • Synchronous Spread Spectrum Clocking on all PWMs
  • Over-Current, Under/Over-voltage and Short-Circuit Protection with Hiccup Mode
  • High-Temperature Warning, Shutdown, and Restart
  • Industrial Temperature Range: -40C to 85C

Block Diagram

AS1963_53

 

Documentation