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LP87702 数据表(PDF) 9 Page - Texas Instruments |
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LP87702 数据表(HTML) 9 Page - Texas Instruments |
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9 / 98 page  Limits apply over the junction temperature range –40°C ≤ TJ ≤ 140°C, specified VVANA, VVIN_Bx, VVOUT_Bx, VVOUT_BST, and IOUT range, unless otherwise noted. Typical values are at TA = 25°C, VVANA = VVIN_Bx = 3.3 V, VOUT_BST = 5 V and VOUT_Bx = 1 V, unless otherwise noted. (1) (2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT External input clock(6) Nominal frequency 1 24 MHz Nominal frequency step size 1 Required accuracy from nominal frequency –30% 10% External clock detection Delay for detecting loss of external clock, nominal internal clock, clock accuracy ±10% 1.8 µs Delay for detecting valid external clock, nominal internal clock, clock accuracy ±10% 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 MONITORING FUNCTIONS VANA Voltage Monitoring Voltage threshold, VANA_THRESHOLD = 0 3.3 V Voltage threshold, VANA_THRESHOLD = 1 5.0 Voltage window, VANA_WINDOW = 00 ±3% ±4% ±5% Voltage window, VANA_WINDOW = 01 ±4% ±5% ±6% Voltage window, VANA_WINDOW = 10 or 11 ±9% ±10% ±11% VMON1 and VMON2 Voltage Monitoring Thresholds VMONx_THRESHOLD = 000 0.65 V VMONx_THRESHOLD = 001 0.8 VMONx_THRESHOLD = 010 1.0 VMONx_THRESHOLD = 011 1.1 VMONx_THRESHOLD = 100 1.2 VMONx_THRESHOLD = 101 1.3 VMONx_THRESHOLD = 110 1.8 VMONx_THRESHOLD = 111 1.8 VMON1 and VMON2 Voltage Monitoring Windows VMONx_WINDOW = 00, VMONx_THRESHOLD from 000 to 111 ±1% ±2% ±3% VMONx_WINDOW = 01, VMONx_THRESHOLD from 000 to 111 ±2% ±3% ±4% VMONx_WINDOW = 10, VMONx_THRESHOLD from 000 to 111 ±3% ±4% ±5% VMONx_WINDOW = 11, VMONx_THRESHOLD from 000 to 111 ±5% ±6% ±7% Buck0 and Buck1 Voltage Monitoring Windows BUCKx_WINDOW = 00 ±20 ±30 ±40 mV BUCKx_WINDOW = 01 ±37 ±50 ±63 BUCKx_WINDOW = 10 ±57 ±70 ±83 BUCKx_WINDOW = 11 ±77 ±90 ±103 Boost Voltage Monitoring BOOST_WINDOW = 00 ±0.6% ±2% ±3.4% BOOST_WINDOW = 01 ±2.6% ±4% ±5.4% BOOST_WINDOW = 10 ±4.6% ±6% ±7.4% BOOST_WINDOW = 11 ±6.6% ±8% ±9.4% Deglitch time VANA, VMONx and BOOST monitoring 12 17 μs BUCKx monitoring 6 9 PROTECTION FUNCTIONS Thermal warning Temperature rising, TDIE_WARN_LEVEL = 0 115 125 135 °C Temperature rising, TDIE_WARN_LEVEL = 1 130 140 150 Hysteresis 20 www.ti.com LP87702 SNVSBU3 – MARCH 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 9 Product Folder Links: LP87702 |
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