SMB20X/20XA - Summit Microelectronics - #1

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SMB207/A/208/A/209/A Preliminary Information 1 (See Last Page) SUMMIT Microelectronics, Inc. 2009 • 757 N. Mary Ave • Sunnyvale CA 94085 • Phone 408 523-1000 • FAX 408 523-1266 http://www.summitmicro.com/ 2147 2.0 7/24/2010 1 Single & Dual Programmable Buck Regulators with Integrated MOSFETs and Digital Control 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 (SMB207A/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) Applications • Digital LCD/Plasma TV • Digital Set-Top Box/PVR/DVR • Datacom/Telecom Equipment 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 system optimization. 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. Memory CPU SMB207/A/208/A Step-Down 1 int. FET System Control and PGOOD/RESET Output Monitoring Enable Inputs +4.5V to +16V DC IN Step-Down 0 int. FET +0.8V to +5.0V (Prog.) up to 1A/2A +0.8V to +5.0V (Prog.) up to 1A/2A I2C I/F ASIC/SoC SMB209/A System Control and PGOOD/RESET Output Monitoring Enable Input +4.5V to +16V DC IN Step-Down int. FET +0.8V to +5.0V (Prog.) 4A I2C I/F Figure 1 - SIMPLIFIED APPLICATION FEATURES & APPLICATIONS INTRODUCTION