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LM25037QMTX データシート(PDF) 6 Page - Texas Instruments |
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LM25037QMTX データシート(HTML) 6 Page - Texas Instruments |
6 / 37 page LM25037, LM25037-Q1 SNVS572E – JULY 2008 – REVISED JANUARY 2016 www.ti.com Electrical Characteristics (continued) VVIN = 12V, VVCC = 10V, RRT1 = 30.1 kΩ, RRT2 = 30.1 kΩ, VUVLO = 3 V, TJ =−40°C to +125° unless otherwise stated. (1)(2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CURRENT LIMIT RESTART (RES PIN) VRES RES threshold 1.9 2 2.2 V Charge source current VRES = 1.5 V 14 18 21 µA Discharge sink current VRES = 1 V 5 8 11 µA SOFT-START (SS PIN) Charging current in normal ISS VSS = 0 70 100 130 µA operation Charging current during a VSS = 0 0.6 1 1.4 µA hiccup mode restart Soft-stop current sink VSS = 2 V 70 100 130 µA OSCILLATOR (RT1 AND RT2 PINS) DT1 Dead-time 1 RRT2 = 15 kΩ 40 75 105 ns DT2 Dead-time 2 RRT2 = 50 kΩ 250 ns Frequency 1 (at OUTA, half FSW1 RRT1 = 30.1 kΩ, RRT2 = 30.1 kΩ, 178 200 222 kHz oscillator frequency) Frequency 2 (at OUTA, half FSW2 RRT1 = 11 kΩ, RRT2 = 30.1 kΩ, 448 515 578 kHz oscillator frequency) DC level 2 V Input sync threshold 2.5 3 3.4 V PWM CONTROLLER (COMP PIN) Delay to output 65 ns VPWM-OS SS to RAMP offset 0.7 1 1.2 V Minimum duty cycle VSS = 0 V TJ = 25°C 0% COMP open-circuit voltage VFB = 0 V 4.5 4.75 5 V COMP short-circuit current VFB = 0 V, COMP = 0 V 0.5 1 1.5 mA VOLTAGE FEED-FORWARD (RAMP PIN) RAMP sink impedance 5 20 Ω (clocked) ERROR AMPLIFIER GBW Gain bandwidth 4 MHz DC gain 75 dB Input voltage VFB = COMP 1.22 1.245 1.27 V COMP sink capability VFB = 1.5 V COMP = 1 V TJ = 25°C 5 13 mA FB bias current 10 nA MAIN OUTPUT DRIVERS (OUTA and OUTB Pins) Output high voltage IOUT = 50 mA, (source) Vcc-0.5 Vcc-0.25 V Output low voltage IOUT = 100 mA (sink) 0.2 0.5 V Rise time CLOAD = 1 nF 17 ns Fall time CLOAD = 1 nF 18 ns Peak source current VVCC = 10 V 1.2 A Peak sink current VVCC = 10 V 1.2 A THERMAL SHUTDOWN TSD Thermal shutdown threshold 165 °C Thermal shutdown hysteresis 25 °C 6 Submit Documentation Feedback Copyright © 2008–2016, Texas Instruments Incorporated Product Folder Links: LM25037 LM25037-Q1 |
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