LM2576HVT-5.0

3A, 52kHz, Step-down Switching Regulator LM2576HV FEATURES SOP-8PP PKG  Step-down Switching Regulator  Adjustable Version Output Voltage Range, 1.23V to 52V ± 4% Max over Line and Load conditions  Guaranteed Output Current of 3A  Fixed Output Voltages : 3.3V, 5.0V, 12V and 15V  Wide Input Voltage Range 60V  52 kHz Fixed Frequency Oscillator  TTL Shutdown Capability, Low Power Standby Mode  Requires only 4 External Components  High Efficiency  Use Readily Available Standard Inductors  Available in TO-220, TO-263 and SOP-8PP Packages  Thermal Shutdown and Current Limit Protection  Moisture Sensitivity Level 3 TO-220 PKG ORDERING INFORMATION Device Package LM2576HVDP-ADJ SOP-8PP 8L LM2576HVDP-X.X LM2576HVR-ADJ TO-263 5L LM2576HVR-X.X LM2576HVT-ADJ TO-220 5L LM2576HVT-X.X X.X = Output Voltage = 3.3, 5.0, 12, 15 APPLICATION     TO-263 PKG Simple high-efficiency step-down (buck) regulator Efficient pre-regulator for linear regulators On-card switching regulators Positive to negative converter (Buck-Boost) DESCRIPSION The LM2576HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V, 12V, 15V and adjustable output versions. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator. The LM2576HV series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required. A standard series of inductors optimized for use with the LM2576HV are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a guaranteed ± 4% tolerance on output voltage within specified input voltages and output load conditions, and ± 10% on the oscillator frequency. External shutdown is included, featuring 50uA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. Absolute Maximum Ratings (Note 1) CHARACTERISTIC SYMBOL Input Supply Voltage VIN MIN. MAX. UNIT - 63 V ON/OFF Pin Input Voltage -0.3 + VIN V Output Voltage to Ground (Steady State) -0.75 V Lead Temperature (Soldering, 5 sec) TSOL 260 ℃ Storage Temperature Range TSTG -65 150 ℃ Maximum Junction Temperature Range TJOPR - 150 ℃ Oct. 2015– R1.2 -1- HTC 3A, 52kHz, Step-down Switching Regulator LM2576HV Operating Ratings CHARACTERISTIC SYMBOL MIN. MAX. UNIT Supply Voltage VIN - 60 V Temperature Range TJ -40 125 ℃ Ordering Information VOUT ADJ 3.3V 5.0V 12V 15V Package Order No. Description Supplied As Status SOP-8PP 8L LM2576HVDP -ADJ 3A, 52kHz, Adjustable Reel Contact us TO-263 5L LM2576HVR -ADJ 3A, 52kHz, Adjustable Reel Contact us TO-220 5L LM2576HVT -ADJ 3A, 52kHz, Adjustable Tube Contact us SOP-8PP 8L LM2576HVDP -3.3 3A, 52kHz, Fixed Reel Contact us TO-263 5L LM2576HVR -3.3 3A, 52kHz, Fixed Reel Contact us TO-220 5L LM2576HVT -3.3 3A, 52kHz, Fixed Tube Contact us SOP-8PP 8L LM2576HVDP -5.0 3A, 52kHz, Fixed Reel Contact us TO-263 5L LM2576HVR -5.0 3A, 52kHz, Fixed Reel Contact us TO-220 5L LM2576HVT -5.0 3A, 52kHz, Fixed Tube Contact us SOP-8PP 8L LM2576HVDP -12 3A, 52kHz, Fixed Reel Contact us TO-263 5L LM2576HVR -12 3A, 52kHz, Fixed Reel Contact us TO-220 5L LM2576HVT -12 3A, 52kHz, Fixed Tube Contact us SOP-8PP 8L LM2576HVDP -15 3A, 52kHz, Fixed Reel Contact us TO-263 5L LM2576HVR -15 3A, 52kHz, Fixed Reel Contact us TO-220 5L LM2576HVT -15 3A, 52kHz, Fixed Tube Contact us LM 2576HV Output Voltage : ADJ / 3.3V / 5.0V /12V Package Type DP : SOP8-PP T : TO-220-5L R : TO-263-5L Root Name Product Code Oct. 2015– R1.2 -2- HTC 3A, 52kHz, Step-down Switching Regulator LM2576HV PIN CONFIGURATION VIN VOUT FB/ADJ On/Off 1. 2. 3. 4. 5. 4. 3. 2. 1. 8. GND 7. GND 6. GND 5. GND SOP-8PP ON/OFF FB/ADJ GND VOUT VIN 5. 4. 3. 2. 1. TO-263 ON/OFF FB/ADJ GND VOUT VIN TO-220 PIN DESCRIPTION TO-263 / TO-220 5 LEAD SOP-8PP 8 LEAD Pin No. Name Function Name Function 1 VIN Input Supply VIN Input Supply 2 VOUT Output Voltage VOUT Output Voltage 3 GND Ground FB / ADJ Output Voltage Feedback or Output Adjust 4 FB / ADJ Output Voltage Feedback or Output Adjust ON/OFF ON/OFF Shutdown 5/ 6/ 7/ 8 ON/OFF ON/OFF Shutdown GND Ground * Exposed Pad of SOP8-PP package should be externally connected to GND. TYPICAL APPLICATION - Fixed Output Voltage Version LM2576HV Input Voltage VIN Oct. 2015– R1.2 Regulated Output 5V OUTPUT ON/OFF CIN + 100uF L1 100uH GND Feed back + D1 -3- COUT 1000uF HTC 3A, 52kHz, Step-down Switching Regulator LM2576HV ELECTRICAL CHARACTERISTICS Specifications with standard type face are for TJ = 25℃ 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. PARAMETER TEST CONDITION (Note 2) SYMBOL MIN. TYP. MAX. UNIT VIN =12V, ILOAD =0.5A 1.217 1.230 1.243 V 0.5A ≤ ILOAD ≤ 3A , 1.193 8V ≤ VIN ≤ 55V 1.180 VIN =12V, ILOAD =0.5A 3.234 0.5A ≤ ILOAD ≤ 3A , 3.168 6V ≤ VIN ≤ 55V 3.135 VIN =12V, ILOAD =0.5A 4.900 0.5A ≤ ILOAD ≤ 3A , 4.800 8V ≤ VIN ≤ 55V 4.750 VIN =25V, ILOAD =0.5A 11.76 0.5A ≤ ILOAD ≤ 3A , 11.52 15V ≤ VIN ≤ 55V 11.40 VIN =25V, ILOAD =0.5A 14.70 0.5A ≤ ILOAD ≤ 3A , 14.40 18V ≤ VIN ≤ 55V 14.25 SYSTEM PARAMETERS (Note 3) Feedback Voltage VFB LM2576HV-ADJ LM2576HV-3.3 LM2576HV-5.0 Output Voltage VO LM2576HV-12 LM2576HV-15 LM2576HV-ADJ Efficiency VIN =12V, ILOAD =3A, Vo = 5V 1.230 3.300 3.300 5.000 5.000 12.00 12.00 15.00 15.00 1.273 1.286 3.366 3.450 3.482 5.100 5.225 5.275 12.24 12.54 12.66 15.30 15.68 15.83 V V V V V V V V V 77 % LM2576HV-3.3 VIN =12V, ILOAD =3A 75 % LM2576HV-5.0 VIN =12V, ILOAD =3A 77 % LM2576HV-12 VIN =15V, ILOAD =3A 88 % LM2576HV-15 VIN =18V, ILOAD =3A 88 % DEVICE PARAMETERS Feedback Bias Current Oscillator Frequency Ib VO = 5V (Adjustable Version Only) fO (Note 8) Saturation Voltage VSAT IO = 3A (Note 4) Max Duty Cycle(ON) DC (Note 5) Current Limit ICL (Note 4, 8) Oct. 2015– R1.2 50 47 42 52 1.4 93 4.2 3.5 -4- 100 500 58 63 1.55 1.70 98 5.8 nA kHZ V % 6.9 7.5 A HTC 3A, 52kHz, Step-down Switching Regulator LM2576HV (Continued) PARAMETER SYMBOL Output Leakage Current Quiescent Current Standby Quiescent IL (Notes 6, 7) Output=0V IQ (Note 6) ISTBY Current TEST CONDITION ON/OFF Pin = 5V (OFF) MIN. TYP. MAX. 7.5 VIN = 60V UNIT mA 5 10 mA 50 200 uA ON /OFF CONTROL ON /OFF Pin Logic Input Level ON /OFF Pin Input Current 2.2 VIH VO = 0V VIL VO = Nominal Output Voltage 1.2 IIH ON /OFF Pin = 5V (OFF) 12 30 uA IIL ON /OFF Pin = 0V (ON) 0 10 uA 2.4 1.4 V 1.0 0.8 V 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 2576HV is used as shown in the Figure 2 test circuit, system performance will be as 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 =60V. 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%. Oct. 2015– R1.2 -5- HTC 3A, 52kHz, Step-down Switching Regulator LM2576HV TYPICAL OPERATING CHARACTERISTIC Oct. 2015– R1.2 -6- HTC 3A, 52kHz, Step-down Switching Regulator LM2576HV APPLICATION INFORMATION As in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance generate voltage transients which can cause problems. For minimal inductance and ground loops, the length of the leads indicated by heavy lines should be kept as short as possible. Single-point grounding (as indicated) or ground plane construction should be used for best results. When using the Adjustable version, physically locate the programming resistors near the regulator, to keep the sensitive feedback wiring short. - Fixed Output Voltage Version LM2576HV Input Voltage VIN Regulated Output 5V OUTPUT Feed back ON/OFF CIN + 100uF L1 100uH GND + D1 MBR360 COUT 1000uF - Adjustable Output Voltage Version LM2576HV Input Voltage VIN L1 100uH Regulated Output 5V OUTPUT R2 ON/OFF CIN + 100uF * VOUT = VREF (1+ * R2 = R1( GND Feed back + D1 MBR360 COUT 1000uF R1 R2 ) R1 VOUT - 1) VREF where VREF = 1.23V, R1 between 1KΩ and 5KΩ. - Oct. 2015– R1.2 CIN : 100uF, 75V, Aluminum Electrolytic COUT : 1000uF, 25V, Aluminum Electrolytic D1 - Schottky, MBR360 L1 : 100uH, Pulse Eng. PE-92108 R1 : 2K, 0.1% R2 : 6.12K, 0.1% -7- HTC 3A, 52kHz, Step-down Switching Regulator LM2576HV REVISION NOTICE The description in this data sheet can be revised without any notice to describe its electrical characteristics properly. Oct. 2015– R1.2 -8- HTC