SMB211/212 preliminary information ? summit microelectronics, inc. 2008 ? 757 n. mary avenue ? sunnyvale ca 94085 ? phone 408 523-1000 ? fax 408 523-1266 http://www.summitmicro.com/ 2139 2.2 1/17/2011 1 programmable power managers with digital power control features ? digital power control via 2-wire serial interface and non- volatile memory ? current-mode control ? input voltage range: +4.5v to +13.5v ? more than 15a output current ? output voltage accuracy: ? 1.0% ? static or dynamically programmable output voltage o +0.5v to +2.5v, 10mv steps o +1v to +5.0v, 20mv steps ? cycle-by-cycle current limit ? output voltage margining ? output uv/ov monitoring ? internal over-temperature protection ? pwm or pfm operation ? programmable system power control o digital soft-start control o power-on delay o switching frequency o pgood/reset/smb_alert output o enable/disable control o serial-interface slave addresses o output voltage applications ? printers ? digital set-top boxes ? digital tvs ? modems ? datacom/telecom equipment ? servers the SMB211/212 are highly integrated and flexible power manager designed for use in a wide range of app lications from printers and set- top boxes to servers and network equipment. the built-in non-volatile digital programmability allows syst em designers to custom tailor the device to suit almost any power supply application. the SMB211/212 feature a synchronous high current step-down ?buck? controller that can provide an output current of more than 15a. they can operate with an input voltage of +4.5v to +13.5v and provide programmable output voltages that are typically accurate to 1.0%. the SMB211 is available with a switching frequency of 250, 500, 750 and 1000khz, while the smb212 is available with a switching frequency of 250, 375, 500 and 625khz. additional sophisticated pow er control/monitoring functions required by complex systems are built-in and programmed via an industry-standard 2-wire serial interface. these include digitally programmable output voltage set-point and margining, power-on delay, soft-start, switching frequency and uv/ov output voltage monitoring. the integration of features and built-in flexibility of the SMB211/212 allows the system designer to create a ?platform solution? that can be easily modified via software without major hardware changes. this facilitates rapid design cycles and pr oliferation from a base design to future generations of product. communication is accomplished via an industry standard 2-wire serial bus. all non-volatile programmed setti ngs are stored in non-volatile memory and reset during power-up. the operating temperature range is ?30c to +85c and the availabl e package is a 3mm x 3mm qfn-20. system application features & applications introduction SMB211/212 i2c/smbus (pmbus) system control and monitoring status/alert outputs en/control input +4.5v to +13.5v vin step-down ext. fet 0.5v-5v (prog.) 20a+ asic/cpu/ soc figure 1 ? typical SMB211/212 system diagram
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