Summit

SMB209

Single & Dual Programmable Buck Regulators with Integrated MOSFETs and Digital Control

Topology: Buck
Input Voltage (min.): 4.50 V
Input Voltage (max.): 16.00 V
Output 1: 5.00 V / 4.000 A

Original publication on 2010-07-24, revision 2 on

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.

Characteristics

  • 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)

Products

  Order Code SPEC Product series L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Version Samples
7447789002 PDF WE-PD SMT Power Inductor 2.2 4.02 4.8 19 23 67 Robust