DC2830A Analog Devices

LTC7106 A 7-Bit Current DAC with PMBus Interface FEATURES DESCRIPTION n 0.8% I Positive Output Current Accuracy The LTC 7106 is a precision, PMBus controlled, bidi- DAC (OverTemp) rectional current digital-to-analog converter that adjusts n 1.5% I Negative Output Current Accuracy the output voltage of any conventional V referenced DAC FB (OverTemp) regulator. The LTC7106 can work with the vast majority 2 n PMBus/I C Compliant Serial Interface of power management controllers or regulators to enable n Input Voltage Range: 2.5V to 5.5V digital control of the output voltage. Internal power-on n High Impedance at IDAC Output When Disabled reset circuitry keeps the DAC output current at zero n Wide IDAC Operation Voltage (0.4V to 2.0V) (high impedance IDAC) until a valid write takes place. n 7-Bit Programmable DAC Output Current for DC/DC Features include a range bit for easy interfacing to almost V Control any impedance resistor divider, and an open-drain GPO OUT n Wide Range IDAC Output Current: 16Ato 256A output for controlling the Run or Enable pin of the DC/ n Programmable Slew Rate: 500ns ~ 3ms per Bit DC regulator. For most applications, the current DAC error n Available in a 10-Lead (3mm 2mm) DFN Package is significantly attenuated with proper design. See more detail about V accuracy in the Applications Information OUT section of this data sheet. The LTC7106 is supported by the ADI LTpowerPlay development tool with graphical APPLICATIONS user interface (GUI). n General Purpose Power Systems All registered trademarks and trademarks are the property of their respective owners. n Telecom Systems n Industrial Applications TYPICAL APPLICATION Margin High and Margin Low L1 CIRCUIT OF FIGURE 11 SW V OUT V V IN IN C2 I = 40A 330F DAC R FB1 DC/DC V = 24V OUT V REF V OUT V (0.4V to 2V) FB 5V/DIV I = 0A RUN R FB2 DAC I = 40A DAC R4 10k V EN DD 0A TO 63A 2.5V 2V/DIV 7106 TA01b C1 TO 5.5V 100ms/DIV 1F 10k 10k 10k R3 R2 R1 V DD EN GPO 64A TO 0A SDA SDA SCL PMBus INTERFACE SCL ALERT LTC7106 IDAC ALERT GND ASEL0 ASEL1 7106 TA01a V DD Rev A 1 Document Feedback For more information www.analog.comLTC7106 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) All Pins Except GND .................................. 0.3V to 6.0V TOP VIEW Operating Junction Temperature Range ... 40C to 125C SDA 1 10 ASEL1 Storage Temperature Range .................. 65C to 150C SCL 2 9 ASEL0 V 3 8 GPO DD ALERT 4 7 EN GND 5 6 IDAC DDB PACKAGE 10-LEAD (3mm 2mm) PLASTIC DFN = 55C/W, = 16.8C/W JA JC ORDER INFORMATION