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LTC1629-PG Datasheet(PDF) 4 Page - Linear Technology |
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LTC1629-PG Datasheet(HTML) 4 Page - Linear Technology |
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4 / 28 page  4 LTC1629/LTC1629-PG ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Note 4: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See Applications Information. Note 5: When the AMPMD pin is high, the 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: The 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: LTC1629/LTC1629-PG: TJ = TA + (PD • 95°C/W) Note 3: The LTC1629/LTC1629-PG are tested in a feedback loop that servos VITH to a specified voltage and measures the resultant VEAIN. VOS Input Offset Voltage Op Amp Mode; VCM = 2.5V; LTC1629 Only 6 mV VDIFFOUT = 5V; IDIFFOUT = 1mA IB Input Bias Current Op Amp Mode; LTC1629 Only 30 200 nA AOL Open Loop DC Gain Op Amp Mode; 0.7V ≤ VDIFFOUT < 10V; LTC1629 Only 5000 V/mV VCM Common Mode Input Voltage Range Op Amp Mode; LTC1629 Only 0 3 V CMRROA Common Mode Rejection Ratio Op Amp Mode; 0V < VCM < 3V; LTC1629 Only 70 90 dB PSRROA Power Supply Rejection Ratio Op Amp Mode; 6V < VIN < 30V; LTC1629 Only 70 90 dB ICL Maximum Output Current Op Amp Mode; VDIFFOUT = 0V; LTC1629 Only 10 35 mA VOMAX Maximum Output Voltage Op Amp Mode; IDIFFOUT = 1mA; LTC1629 Only 10 11 V GBW Gain-Bandwidth Product Op Amp Mode; IDIFFOUT = 1mA; LTC1629 Only 2 MHz SR Slew Rate Op Amp Mode; RL = 2k; LTC1629 Only 5 V/ µs TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Output Current (Figure 12) Efficiency vs Output Current (Figure 12) Efficiency vs Input Voltage (Figure 12) OUTPUT CURRENT (A) 0.1 100 80 60 40 20 0 1629 G01 1 10 100 VOUT = 3.3V VEXTVCC = 5V IOUT = 20A VIN = 5V VIN = 8V VIN = 12V VIN = 20V OUTPUT CURRENT (A) 1 70 80 1629 G02 60 50 10 100 100 90 VEXTVCC = 0V VOUT = 3.3V VEXTVCC = 5V VIN (V) 5 100 90 80 70 1629 G03 10 15 20 VOUT = 3.3V VEXTVCC = 5V IOUT = 20A |
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