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LM2731 Datasheet(PDF) 4 Page - Texas Instruments |
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LM2731 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 22 page LM2731 SNVS217E – MAY 2004 – REVISED APRIL 2010 www.ti.com Electrical Characteristics Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range ( −40°C ≤ TJ ≤ +125°C). Unless otherwise specified: VIN = 5V, VSHDN = 5V, IL = 0A. Min Typical Max Symbol Parameter Conditions Units (1) (2) (1) VIN Input Voltage 2.7 14 V VOUT (MIN) Minimum Output Voltage RL = 43Ω VIN = 2.7V 5.4 7 V Under Load X Option VIN = 3.3V 8 10 (3) VIN = 5V 13 17 RL = 43Ω VIN = 2.7V 8.25 10 Y Option VIN = 3.3V 10.5 12 (3) VIN = 5V 14 16 RL = 15Ω VIN = 2.7V 3.75 5 X Option VIN = 3.3V 5 6.5 (3) VIN = 5V 8.75 11 RL = 15Ω VIN = 2.7V 5 6 Y Option VIN = 3.3V 5.5 7.5 (3) VIN = 5V 9 11 ISW Switch Current Limit (4) 1.8 2 A 1.4 RDS(ON) Switch ON Resistance ISW = 100 mA 260 400 m Ω Vin = 5V 500 ISW = 100 mA 300 450 Vin = 3.3V 550 SHDNTH Shutdown Threshold Device ON 1.5 V Device OFF 0.50 ISHDN Shutdown Pin Bias Current VSHDN = 0 0 µA VSHDN = 5V 0 2 VFB Feedback Pin Reference VIN = 3V 1.205 1.230 1.255 V Voltage IFB Feedback Pin Bias Current VFB = 1.23V 60 500 nA IQ Quiescent Current VSHDN = 5V, Switching "X" 2 3.0 mA VSHDN = 5V, Switching "Y" 1.0 2 VSHDN = 5V, Not Switching 400 500 µA VSHDN = 0 0.024 1 FB Voltage Line 2.7V ≤ VIN ≤ 14V 0.02 %/V Regulation (1) FSW Switching Frequency “X” Option 1 1.6 1.85 MHz (5) “Y” Option 0.40 0.60 0.8 DMAX Maximum Duty Cycle “X” Option 86 93 % (5) “Y” Option 92 96 IL Switch Leakage Not Switching VSW = 5V 1 µA (1) Limits are guaranteed by testing, statistical correlation, or design. (2) Typical values are derived from the mean value of a large quantity of samples tested during characterization and represent the most likely expected value of the parameter at room temperature. (3) L = 10 µH, COUT = 4.7 µF, duty cycle = maximum (4) Switch current limit is dependent on duty cycle (see Typical Performance Characteristics). (5) Guaranteed limits are the same for Vin = 3.3V input. 4 Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated Product Folder Links: LM2731 |
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