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LP87524B-Q1 Datasheet(PDF) 8 Page - Texas Instruments |
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LP87524B-Q1 Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 71 page  8 LP87524B-Q1 SNVSAW2 – APRIL 2017 www.ti.com Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated Electrical Characteristics (continued) Limits apply over the junction temperature range –40°C ≤ TJ ≤ +140°C, CPOL = 22 µF / phase, specified VVANA, VVIN_Bx , VNRST, VVOUT_Bx and IOUT range, unless otherwise noted. Typical values are at TJ = 25°C, VVANA = VVIN_Bx = 3.7 V, and VOUT = 1 V, unless otherwise noted. (1) (2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Output voltage monitoring for PGOOD pin Overvoltage monitoring (compared to DC output voltage level, VVOUT_DC) 39 50 64 mV Undervoltage monitoring (compared to DC output voltage level, VVOUT_DC) –53 –40 –29 Debounce time during regulator enable PGOOD_SET_DELAY = 0 4 10 µs Debounce time during regulator enable PGOOD_SET_DELAY = 1 10 11 13 ms Deglitch time during operation and after voltage change 4 10 µs Powergood threshold for interrupt BUCKx_PG_INT, difference from final voltage Rising ramp voltage, enable or voltage change –20 –14 –8 mV Falling ramp voltage, voltage change 8 14 20 Powergood threshold for status bit BUCKx_PG_STAT During operation, status signal is forced to '0' during voltage change –20 –14 –8 mV EXTERNAL CLOCK AND PLL External input clock Nominal frequency 1 24 MHz Nominal frequency step size 1 Required accuracy from nominal frequency –30% 10% External clock detection Delay for missing clock detection 1.8 µs Delay and debounce for clock detection 20 Clock change delay (internal to external) Delay from valid clock detection to use of external clock 600 µs PLL output clock jitter Cycle to cycle 300 ps, p-p PROTECTION FUNCTIONS Thermal warning Temperature rising, TDIE_WARN_LEVEL = 0 115 125 135 °C Temperature rising, TDIE_WARN_LEVEL = 1 127 137 147 Hysteresis 20 Thermal shutdown Temperature rising 140 150 160 °C Hysteresis 20 VANAOVP VANA overvoltage Voltage rising 5.6 5.8 6.1 V Voltage falling 5.45 5.73 5.96 Hysteresis 40 mV VANAUVLO VANA undervoltage lockout Voltage rising 2.51 2.63 2.75 V Voltage falling 2.5 2.6 2.7 LOAD CURRENT MEASUREMENT Current measurement range Output current for maximum code 20.47 A Resolution LSB 20 mA Measurement accuracy IOUT > 1 A <10% Measurement time PFM mode (automatically changing to PWM mode for the measurement) 45 µs PWM mode 4 CURRENT CONSUMPTION |
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