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LM2671 Datasheet(PDF) 6 Page - Texas Instruments |
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LM2671 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 36 page  6 LM2671 SNVS008L – SEPTEMBER 1998 – REVISED JUNE 2016 www.ti.com Product Folder Links: LM2671 Submit Documentation Feedback Copyright © 1998–2016, Texas Instruments Incorporated (1) All room temperature limits are 100% production tested. All limits at temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (2) Typical numbers are at 25°C and represent the most likely norm. (3) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator performance. When the LM2671 is used as shown in Figure 15 and Figure 21 test circuits, system performance is as specified by the system parameters section of the Electrical Characteristics. 7.8 Electrical Characteristics – Adjustable Specifications are for TJ = 25°C (unless otherwise noted). PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT SYSTEM PARAMETERS(3) VFB Feedback voltage VIN = 8 V to 40 V, ILOAD = 20 mA to 500 mA VOUT programmed for 5 V TJ = 25°C 1.192 1.21 1.228 V Over full operating temperature range 1.174 1.246 VIN = 6.5 V to 40 V, ILOAD = 20 mA to 250 mA VOUT programmed for 5 V TJ = 25°C 1.192 1.21 1.228 V Over full operating temperature range 1.174 1.246 η Efficiency VIN = 12 V, ILOAD = 500 mA 90% 7.9 Electrical Characteristics – All Output Voltage Versions Specifications are for TJ = 25°C, VIN = 12 V for the 3.3-V, 5-V, and Adjustable versions and VIN = 24 V for the 12-V version, and ILOAD = 100 mA (unless otherwise noted). PARAMETERS TEST CONDITIONS MIN TYP MAX UNIT DEVICE PARAMETERS IQ Quiescent current VFEEDBACK = 8 V for 3.3-V, 5-V, and adjustable versions 2.5 3.6 mA VFEEDBACK = 15 V for 12-V versions 2.5 ISTBY Standby quiescent current ON/OFF pin = 0 V TJ = 25°C 50 100 μA Over full operating temperature range 150 ICL Current limit TJ = 25°C 0.62 0.8 1.2 A Over full operating temperature range 0.575 1.25 IL Output leakage current VIN = 40 V, ON/OFF pin = 0 V VSWITCH = 0 V 1 25 μA VSWITCH = −1 V, ON/OFF pin = 0 V 6 15 mA RDS(ON) Switch ON-resistance ISWITCH = 500 mA TJ = 25°C 0.25 0.4 Ω Over full operating temperature range 0.6 fO Oscillator frequency Measured at switch pin TJ = 25°C 260 kHz Over full operating temperature range 225 275 D Maximum duty cycle 95% Minimum duty cycle 0% IBIAS Feedback bias current VFEEDBACK = 1.3 V (adjustable version only) 85 nA VS/D ON/OFF pin voltage thresholds TJ = 25°C 1.4 V Over full operating temperature range 0.8 2 IS/D ON/OFF pin current ON/OFF pin = 0 V TJ = 25°C 20 μA Over full operating temperature range 7 37 FSYNC Synchronization frequency VSYNC = 3.5 V, 50% duty cycle 400 kHz VSYNC Synchronization threshold voltage 1.4 V VSS Soft-start voltage TJ = 25°C 0.63 V Over full operating temperature range 0.53 0.73 ISS Soft-start current TJ = 25°C 4.5 μA Over full operating temperature range 1.5 6.9 |
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