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LM2672MX-ADJ 데이터시트(PDF) 6 Page - Texas Instruments |
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LM2672MX-ADJ 데이터시트(HTML) 6 Page - Texas Instruments |
6 / 36 page 6 LM2672 SNVS136L – SEPTEMBER 1998 – REVISED JUNE 2016 www.ti.com Product Folder Links: LM2672 Submit Documentation Feedback Copyright © 1998–2016, Texas Instruments Incorporated (1) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator performance. When the LM2672 is used as shown in Figure 19 test circuits, system performance is as specified by the system parameters section of Electrical Characteristics. (2) All limits specified at room temperature and at temperature extremes. All room temperature limits are 100% production tested. All limits at temperature extremes are specified through correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (3) Typical numbers are at 25°C and represent the most likely norm. 7.8 Electrical Characteristics – Adjustable TJ = 25°C (unless otherwise noted; see Figure 19) (1) PARAMETER TEST CONDITIONS MIN(2) TYP(3) MAX(2) UNIT VFB Feedback voltage VIN = 8 V to 40 V, ILOAD = 20 mA to 1 A, VOUT programmed for 5 V (see Figure 19) TJ = 25°C 1.192 1.21 1.228 V TJ = –40°C to 125°C 1.174 1.246 VIN = 6.5 V to 40 V, ILOAD = 20 mA to 500 mA, VOUT programmed for 5 V (see Figure 19) TJ = 25°C 1.192 1.21 1.228 TJ = –40°C to 125°C 1.174 1.246 η Efficiency VIN = 12 V, ILOAD = 1 A 90% (1) All limits specified at room temperature and at temperature extremes. All room temperature limits are 100% production tested. All limits at temperature extremes are specified 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. 7.9 Electrical Characteristics – All Output Voltage Versions TJ = 25°C, VIN = 12 V for the 3.3 V, 5 V, and Adjustable versions and VIN = 24V for the 12V version, and ILOAD = 100 mA (unless otherwise noted) PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT 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 TJ = –40°C to 125°C 150 ICL Current limit 1.25 1.55 2.1 A 1.2 2.2 IL Output leakage current VSWITCH = 0 V, ON/OFF Pin = 0 V, VIN = 40 V 1 25 μA VSWITCH = −1 V, ON/OFF Pin = 0 V 6 15 mA RDS(ON) Switch on-resistance ISWITCH = 1 A TJ = 25°C 0.25 0.3 Ω TJ = –40°C to 125°C 0.5 fO Oscillator frequency Measured at switch pin TJ = 25°C 260 kHz TJ = –40°C to 125°C 225 275 D Maximum duty cycle TJ = 25°C 95% Minimum duty cycle TJ = –40°C to 125°C 0% IBIAS Feedback bias current VFEEDBACK = 1.3 V, adjustable version only 85 nA VS/D ON/OFF pin voltage TJ = 25°C 1.4 V TJ = –40°C to 125°C 0.8 2 IS/D ON/OFF pin current ON/OFF Pin = 0 V TJ = 25°C 20 μA TJ = –40°C to 125°C 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 TJ = –40°C to 125°C 0.53 0.73 ISS Soft-start current TJ = 25°C 4.5 μA TJ = –40°C to 125°C 1.5 6.9 |
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