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LM67660 Datasheet(PDF) 11 Page - Texas Instruments |
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LM67660 Datasheet(HTML) 11 Page - Texas Instruments |
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11 / 66 page  6.5 Electrical Characteristics (continued) Typical values are at TJ = 25°C. Minimum and maximum limits apply at TJ = –40°C to 150°C, unless otherwise stated. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IL-PK3(AUTO-maxD) AUTO-mode peak inductor current at maximum duty cycle, 4A option tON ≥ 1µs 0.65 A ILS-NEG-LIM Low-side negative current limit Sinking current limit, FPWM mode –9.6 –6.9 –4.9 A IL-ZC Zero-cross threshold AUTO mode 100 mA VHIC FB voltage hiccup threshold Low-side FET on-time > 165ns, after soft start 0.32 V tHICDLY Hiccup mode activation delay 64 cycles tHIC Hiccup mode duration time Internal soft start 48 ms POWER GOOD (PG) VPG-OV(R) PG OV rising threshold % of FB voltage (ADJ output) or BIAS voltage (fixed output) 103 105 107 % VPG-OV(F) PG OV falling threshold 101 104 106 % VPG-UV(R) PG UV rising threshold 94 96 98.5 % VPG-UV(F) PG UV falling threshold 92.5 95 97 % tPG-DEGLITCH(R) Deglitch filter delay on PG rising edge 1.2 2 3 ms tPG-DEGLITCH(F) Deglitch filter delay on PG falling edge 55 130 175 µs VIN(PG-VALID) Minimum VIN for valid PG output VPG(OL) < 0.4V, RPG = 49.9kΩ, VPG = 5V 1.25 V VPG(OL) PG low-state voltage IPG = 1mA, VIN = 1.25V 0.4 V RPG(on) PG switch on resistance IPG = 1mA 51 110 Ω SWITCHING FREQUENCY (RT) fSW1 Switching frequency RT tied to PGND 1.98 2.2 2.42 MHz RRT = 6.81kΩ ±1% 1.98 2.2 2.42 MHz fSW2 RRT = 15.8kΩ ±1% 900 1000 1100 kHz fSW3 RRT = 40.2kΩ ±1% 360 400 440 kHz RT tied to VCC 360 400 440 kHz SYNCHRONIZATION (MODE/SYNC) VSYNC(IL) SYNC input low-level threshold 0.45 V VSYNC(IH) SYNC input high-level threshold 1.3 V VSYNCOUT(OL) SYNCOUT output low-level threshold ISYNCOUT = 2mA 0.4 V VSYNCOUT(OH) SYNCOUT output high-level threshold ISYNCOUT = –2mA 2.4 V fSYNC-RANGE1 Synchronization frequency range for set 2.2MHz RRT = 6.81kΩ ±1% 1.76 2.64 MHz fSYNC-RANGE2 Synchronization frequency range for set 300kHz RRT = 54.2kΩ ±1% 240 360 kHz tSYNC-LOW(min) Minimum low pulse width of external SYNC signal 80 ns tSYNC-HIGH(min) Minimum high pulse width of external SYNC signal 80 ns tSYNC-SW-DLY SYNC to SW delay time(1) –22 22 ns tMODE-DLY MODE change delay time(1) 20 µs DUAL RANDOM SPREAD SPECTRUM (DRSS/MCOMM) ΔfSS-LF Low-frequency triangular spread spectrum modulation range DRSS/MCOMM open 17 % fm-LF Triangular modulation frequency DRSS/MCOMM open 3.6 6 8.4 kHz ΔfSS-HF High-frequency pseudo-random spread spectrum modulation range DRSS/MCOMM open 2 % THERMAL SHUTDOWN TSHD Thermal shutdown(1) Shutdown threshold 155 165 177 ºC Recovery threshold 156 ºC (1) Specified by design. www.ti.com LM65680 SNVSCF2 – NOVEMBER 2025 Copyright © 2025 Texas Instruments Incorporated Submit Document Feedback 11 Product Folder Links: LM65680 |
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