Datasheet LTC7813 (Analog Devices) - 3

LTC7813
e lecTrical characTerisTics The
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denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. (Note 2) VBIAS = 12V, VRUN1,2 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG2 = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VBIAS Bias Input Supply Operating Voltage Range 4.5 60 V VOUT1 Buck Regulated Output Voltage Set Point 0.8 60 V VOUT2 Boost Regulated Output Voltage Set Point 60 V VSENSE2(CM) SENSE2 Pins Common Mode Range 2.2 60 V (BOOST Converter Input Supply Voltage) VFB1 Buck Regulated Feedback Voltage (Note 4) ITH1 Voltage = 1.2V 0°C to 85°C 0.792 0.800 0.808 V l 0.788 0.800 0.812 V VFB2 Boost Regulated Feedback Voltage (Note 4) ITH2 Voltage = 1.2V VPRG2 = 0V l 1.182 1.200 1.218 V VPRG2 = FLOAT l 9.78 10.00 10.22 V VPRG2 = INTVCC l 11.74 12.00 12.26 V IFB1 Buck Feedback Current (Note 4) –2 ±50 nA IFB2 Boost Feedback Current (Note 4) VPRG2 = 0V ±0.01 ±0.05 µA VPRG2 = FLOAT 4 6 µA VPRG2 = INTVCC 5 7 µA Reference Voltage Line Regulation (Note 4) VBIAS = 4.5V to 60V 0.002 0.02 %/V Output Voltage Load Regulation (Note 4) Measured in Servo Loop, l 0.01 0.1 % ∆ITH Voltage = 1.2V to 0.7V (Note 4) Measured in Servo Loop, l –0.01 –0.1 % ∆ITH Voltage = 1.2V to 2V gm1,2 Transconductance Amplifier gm (Note 4) ITH1,2 = 1.2V, Sink/Source 5µA 2 mmho IQ Input DC Supply Current (Note 5), VDRVSET = 0V Pulse-Skipping or Forced Continuous Mode RUN1 = 5V and RUN2 = 0V or 1.6 mA (One Channel On) RUN2 = 5V and RUN1 = 0V 0.8 mA VFB1 = 0.83V (No Load), VFB2 = 1.25V (No Load) Pulse-Skipping or Forced Continuous Mode RUN1,2 = 5V, VFB1 = 0.83V (No Load), 2.2 mA (Both Channels On) VFB2 = 1.25V (No Load) Sleep Mode (One Channel On, Buck) RUN1 = 5V and RUN2 = 0V l 29 55 µA VFB1 = 0.83V (No Load) Sleep Mode (One Channel On, Boost) RUN2 = 5V and RUN1 = 0V, VFB2 = 1.25V (No Load) 29 50 µA Sleep Mode (Both Channels On) RUN1 = 5V and RUN2 = 5V, 34 55 µA VFB1 = 0.83V (No Load), VFB2 = 1.25V (No Load) Shutdown RUN1,2 = 0V 3.6 10 µA UVLO Undervoltage Lockout DRVCC Ramping Up DRVUV = 0V l 4.0 4.2 V DRVUV = INTVCC l 7.5 7.8 V DRVCC Ramping Down DRVUV = 0V l 3.6 3.8 4.0 V DRVUV = INTVCC l 6.4 6.7 7.0 V Buck Feedback Overvoltage Protection Measured at VFB1 Relative to Regulated VFB1 7 10 13 % SENSE1+ Pin Current ±1 µA SENSE2+ Pin Current 170 µA SENSE1– Pin Current VSENSE1– < VINTVCC – 0.5V ±1 µA VSENSE1– > VINTVCC + 0.5V 700 µA SENSE2– Pin Current VSENSE2+, VSENSE2– = 12V ±1 µA 7813f For more information www.linear.com/LTC7813 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagrams Operation Applications Information Typical Applications Package Description Typical Application Related Parts