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LM2576T-ADJ Datasheet(PDF) 7 Page - Tiger Electronic Co.,Ltd |
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LM2576T-ADJ Datasheet(HTML) 7 Page - Tiger Electronic Co.,Ltd |
7 / 8 page LM2576 Series All Output Voltage Versions Electrical Characteristics Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN =12V for the 3.3V, 5V, and Adjustable version, VIN =25V for the 12V version, and VIN =30V for the 15V version, , ILOAD =500mA. Symbol Parameter Conditions DEVICE PARAMETERS LM2576-XX XXX XLM LM2576HV-XX Typ Limit (Note 2) Units (Limits) Ib Feedback Bias Current VOUT =5V (Adjustable Version Only) 50 100/500 nA fO Oscillator Frequency (Note 8) 52 VSAT Saturation Voltage IOUT =3A (Note 4) 1.4 DC Max Duty Cycle (ON) (Note 5) 98 ICL Current Limit (Notes 4, 8) 5.8 IL Output Leakage Current (Notes 6, 7): Output = 0V 47/42 58/63 1.8/2.0 93 4.2/3.5 6.9/7.5 2 kHz kHz(Min) kHz(Max) V V(Max) % %(Min) A A(Min) A(Max) mA(Max) Output = -1V Output = -1V 7.5 30 mA mA(Max) IQ Quiescent Current (Note 6) 5 10 mA mA(Max) ISTBY Standby Quiescent Current ___ ON/OFF Pin = 5V (OFF) 50 200 µA µA(Max) ___ ON/OFF CONTROL VIH __ ON/OFF Pin VOUT = 0V 1.4 2.2/2.4 V(Min) VIL Logic Input Level VOUT = Nominal Output Voltage 1.2 1.0/0.8 V(Max) IIH IIL __ ON/OFF Pin Input Current __ ON/OFF Pin = 5V (OFF) __ ON/OFF Pin = 0V (ON) 12 0 30 10 µA µA(Max) µA µA(Max) Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). Note 3: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2576/ LM2576HV is used as shown in the Figure 2 test circuit, system performance will be a s shown in system parameters section of Electrical Characteristics. Note 4: Output pin sourcing current. No diode, inductor or capacitor connected to output. Note 5: Feedback pin removed from output and connected to 0V. Note 6: Feedback pin removed from output and connected to +12V for the Adjustable, 3.3V, and 5V, versions, and +25V for the 12V and 15V versions, to force the output transistor OFF. Note 7: VIN =40V (60V for high voltage version). Note 8: The oscillator frequency reduces to approximately 11 kHz in the event of an output short or an overload which causes the regulated output voltage to drop approximately 40% from the nominal output voltage. This self protections feature lowers the average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%. 5 ELECTRONICS CO.,LTD TIGER |
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