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LTC1929IG-PG Datasheet(PDF) 4 Page - Linear Technology |
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LTC1929IG-PG Datasheet(HTML) 4 Page - Linear Technology |
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4 / 28 page  4 LTC1929/LTC1929-PG SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IB Input Bias Current Op Amp Mode (LTC1929 Only) 30 200 nA AOL Open Loop DC Gain Op Amp Mode; 0.7V ≤ VDIFFOUT < 10V 5000 V/mV (LTC1929 Only) VCM Common Mode Input Voltage Range Op Amp Mode (LTC1929 Only) 0 3 V CMRROA Common Mode Rejection Ratio Op Amp Mode; 0V < VCM < 3V (LTC1929 Only) 70 90 dB PSRROA Power Supply Rejection Ratio Op Amp Mode; 6V < VIN < 30V (LTC1929 Only) 70 90 dB ICL Maximum Output Current Op Amp Mode; VDIFFOUT = 0V (LTC1929 Only) 10 35 mA VO(MAX) Maximum Output Voltage Op Amp Mode; IDIFFOUT = 1mA (LTC1929 Only) 10 11 V GBW Gain-Bandwidth Product Op Amp Mode; IDIFFOUT = 1mA (LTC1929 Only) 2 MHz SR Slew Rate Op Amp Mode; RL = 2k (LTC1929 Only) 5 V/ µs ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS = 5V unless otherwise noted. Note 5: When the AMPMD pin is high (default for the LTC1929-PG), the LTC1929 IC pins are connected directly to the internal op amp inputs. When the AMPMD pin is low, internal MOSFET switches connect four 40k resistors around the op amp to create a standard unity-gain differential amp. Note 6: Minimum on-time condition corresponds to the on inductor peak-to-peak ripple current ≥40% of IMAX (see minimum on-time considerations in the Applications Information section). Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formulas: LTC1929CG: TJ = TA + (PD • 95°C/W) Note 3: The LTC1929 is tested in a feedback loop that servos VITH to a specified voltage and measures the resultant VEAIN. Note 4: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See Applications Information. TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Output Current (Figure 13) OUTPUT CURRENT (A) 0.1 100 80 60 40 20 0 1929 G01 1 10 100 VOUT = 2V VEXTVCC = 0V FREQ = 200kHz VIN = 5V VIN = 8V VIN = 12V VIN = 20V OUTPUT CURRENT (A) 0.1 40 60 1929 G02 20 0 10 1 100 100 80 VIN = 12V VOUT = 2V FREQ = 200kHz VEXTVCC = 5V VEXTVCC = 0V VIN (V) 5 100 90 80 70 60 50 1929 G03 10 15 20 VEXTVCC = 5V IOUT = 20A VOUT = 2V VOUT = 1.6V Efficiency vs Output Current (Figure 13) Efficiency vs VIN (Figure 13) The q denotes the specifications which apply over the full operating |
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