Summit Wireless SMB209

Description

The SMB20X/20XA are a highly integrated and flexible Single/Dual-output DC-DC regulator designed for use in a wide variety of applications. High integration reduces system cost, component count and development time while the built-in nonvolatile digital programmability allows system designers to custom tailor the device to suit almost any application.

The SMB20X/20XA include single/dual DC-DC step-down regulators with integrated high-side MOSFET switches for up to 1A/2A/4A continuous output current. Programmable output voltages as low as +0.8V support the latest VLSI digital cores.Minimum external components result in a very compact solution size for space constrained applications.

Also sophisticated power control/monitoring functions required by many systems are built-in and accessible via digital I2C interface. These include digitally programmable output voltage setpoint, power-up/down softstart and sequencing, independent enable/disable, output UV monitoring with Power Good/Reset output. Additionally on the SMB20XA fine resolution voltage margining is provided to allow for sophisticated systemoptimization.

The integration of features and built-in flexibility of the SMB20X/20XA allow the system designer to create a “platform solution” that can be easily modified without hardware changes. The SMB20X/20XA are well suited to applications with an input range of +4.5 to +16V. The operating temperature range is -40oC to +85oC and the available package is a 3mm X 3mm 20-pad QFN.

Features

• Single/Dual Step-Down DC-DC Outputs

  -Integrated power MOSFET switches

  -1A/2A/4A output current with built in current limit Input voltage range: +4.5V to +16V

  -+0.8V to +5.0V output voltage (+/-2.5% accuracy)

  -Automatic PFM mode for light load efficiency

  -1800 phase interleave (SMB207/A/208/A)

  -Integrated frequency compensation

  -Input undervoltage lockout (UVLO)

  -Integrated Power Control and Programmability

  -I2C Digital or Pin Control

  -Coarse and Fine Output Voltage Setting

   -16-level “Coarse” nominal setpoint -+0.8V to +1.8V @ 100mV/step -+2.5/2.3/3.0/3.3/5.0V

  -8-level “Fine” Margining (20XA only)

• +1.14% to +7.95% (vs. coarse setting)
• PWM frequency: 500kHz or 1MHz
• Output up/down sequence (SMB207/A/208/A)
• Digital output softstart/stop
• Output UV monitoring with PGOOD/RESET output
• Independent output enable pins (SMB207/A/208/A)

Typical applications

• Digital LCD/Plasma TV
• Datacom/Telecom Equipment
• Digital Set-Top Box/PVR/DVR

More information

• Datasheet
• IC product information