LM2575HVT-3.3

LM1575/LM2575/LM2575HV LM1575/LM2575/LM2575HV SIMPLE SWITCHER ® 1A Step-Down Voltage Regulator General Description Features The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. n 3.3V, 5V, 12V, 15V, and adjustable output versions n Adjustable version output voltage range, 1.23V to 37V (57V for HV version) ± 4% max over line and load conditions n Guaranteed 1A output current n Wide input voltage range, 40V up to 60V for HV version n Requires only 4 external components n 52 kHz fixed frequency internal oscillator n TTL shutdown capability, low power standby mode n High efficiency n Uses readily available standard inductors n Thermal shutdown and current limit protection n P+ Product Enhancement tested Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator. The LM2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required. A standard series of inductors optimized for use with the LM2575 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 50 µA (typical) standby current. Typical Application Applications n n n n Simple high-efficiency step-down (buck) regulator Efficient pre-regulator for linear regulators On-card switching regulators Positive to negative converter (Buck-Boost) (Fixed Output Voltage Versions) http://www.hgsemi.com.cn 1 2018 NOV LM1575/LM2575/LM2575HV Block Diagram and Typical Application 3.3V, R2 = 1.7k 5V, R2 = 3.1k 12V, R2 = 8.84k 15V, R2 = 11.3k For ADJ. Version R1 = Open, R2 = 0Ω Note: Pin numbers are for the TO-220 package. FIGURE 1. Connection Diagrams (XXindicatesoutputvoltageoption.) Straight Leads 5–Lead TO-220 (T) Bent, Staggered Leads 5-Lead TO-220 (T) Top View LM2575T-XX or LM2575HVT-XX Top View TO-263(S) 5-Lead Surface-Mount Package Side View LM2575T-XX Flow LB03 or LM2575HVT-XX Flow LB03 Top View Side View LM2575S-XX or LM2575HVS-XX http://www.hgsemi.com.cn 2 2018 NOV LM1575/LM2575/LM2575HV Absolute Maximum Ratings (Note 1) Maximum Supply Voltage LM1575/LM2575 45V LM2575HV 63V ON /OFF Pin Input Voltage Lead Temperature (Soldering, 10 sec.) 260˚C Operating Ratings −0.3V ≤ V ≤ +VIN Output Voltage to Ground Temperature Range (Steady State) −1V Power Dissipation Internally Limited Storage Temperature Range −65˚C to +150˚C Maximum Junction Temperature −55˚C ≤ TJ ≤ +150˚C −40˚C ≤ TJ ≤ +125˚C Supply Voltage 150˚C Minimum ESD Rating (C = 100 pF, R = 1.5 kΩ) LM1575 LM2575/LM2575HV LM1575/LM2575 40V LM2575HV 60V 2 kV LM1575-3.3, LM2575-3.3, LM2575HV-3.3 Electrical Characteristics Specifications with standard type face are for TJ = 25˚C, and those with boldface type apply over full Operating Temperature Range . Symbol Parameter Conditions Typ LM1575-3.3 LM2575-3.3 LM2575HV-3.3 Units (Limits) Limit Limit (Note 2) (Note 3) 3.267 3.234 V(Min) 3.333 3.366 V(Max) 3.200/3.168 3.168/3.135 V(Min) 3.400/3.432 3.432/3.465 V(Max) 3.200/3.168 3.168/3.135 V(Min) 3.416/3.450 3.450/3.482 V(Max) SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 VOUT Output Voltage VIN = 12V, ILOAD = 0.2A 3.3 V Circuit of Figure 2 VOUT VOUT η Output Voltage 4.75V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1A LM1575/LM2575 Circuit of Figure 2 Output Voltage 4.75V ≤ VIN ≤ 60V, 0.2A ≤ ILOAD ≤ 1A LM2575HV Circuit of Figure 2 Efficiency VIN = 12V, ILOAD = 1A 3.3 V 3.3 V 75 % LM1575-5.0, LM2575-5.0, LM2575HV-5.0 Electrical Characteristics Specifications with standard type face are for TJ = 25˚C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions Typ LM1575-5.0 LM2575-5.0 LM2575HV-5.0 Units (Limits) Limit Limit (Note 2) (Note 3) 4.950 4.900 V(Min) 5.050 5.100 V(Max) 4.850/4.800 4.800/4.750 V(Min) 5.150/5.200 5.200/5.250 V(Max) SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 VOUT Output Voltage VIN = 12V, ILOAD = 0.2A 5.0 Circuit of Figure 2 VOUT Output Voltage 0.2A ≤ ILOAD ≤ 1A, LM1575/LM2575 8V ≤ VIN ≤ 40V Output Voltage 0.2A ≤ ILOAD ≤ 1A, LM2575HV 8V ≤ VIN ≤ 60V 4.850/4.800 4.800/4.750 V(Min) Circuit of Figure 2 5.175/5.225 5.225/5.275 V(Max) 5.0 Circuit of Figure 2 VOUT V http://www.hgsemi.com.cn V 5.0 3 V 2018 NOV LM1575/LM2575/LM2575HV LM1575-5.0, LM2575-5.0, LM2575HV-5.0 Electrical Characteristics (Continued) Specifications with standard type face are for TJ = 25˚C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions Typ LM1575-5.0 LM2575-5.0 LM2575HV-5.0 η Efficiency VIN = 12V, ILOAD = 1A Limit Limit (Note 2) (Note 3) 77 Units (Limits) % LM1575-12, LM2575-12, LM2575HV-12 Electrical Characteristics Specifications with standard type face are for TJ = 25˚C, and those with boldface type apply over full Operating Temperature Range . Symbol Parameter Conditions Typ LM1575-12 LM2575-12 LM2575HV-12 Units (Limits) Limit Limit (Note 2) (Note 3) 11.88 11.76 V(Min) 12.12 12.24 V(Max) 11.64/11.52 11.52/11.40 V(Min) 12.36/12.48 12.48/12.60 V(Max) 11.64/11.52 11.52/11.40 V(Min) 12.42/12.54 12.54/12.66 V(Max) SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 VOUT Output Voltage VIN = 25V, ILOAD = 0.2A 12 Circuit of Figure 2 VOUT Output Voltage 0.2A ≤ ILOAD ≤ 1A, LM1575/LM2575 15V ≤ VIN ≤ 40V Output Voltage 0.2A ≤ ILOAD ≤ 1A, LM2575HV 15V ≤ VIN ≤ 60V Efficiency VIN = 15V, ILOAD = 1A 12 Circuit of Figure 2 VOUT V 12 Circuit of Figure 2 η V V 88 % LM1575-15, LM2575-15, LM2575HV-15 Electrical Characteristics Specifications with standard type face are for TJ = 25˚C, and those with boldface type apply over full Operating Temperature Range . Symbol Parameter Conditions Typ LM1575-15 LM2575-15 LM2575HV-15 Units (Limits) Limit Limit (Note 2) (Note 3) 14.85 14.70 V(Min) 15.15 15.30 V(Max) SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 VOUT Output Voltage VIN = 30V, ILOAD = 0.2A 15 Circuit of Figure 2 VOUT VOUT Output Voltage 0.2A ≤ ILOAD ≤ 1A, LM1575/LM2575 18V ≤ VIN ≤ 40V 14.55/14.40 14.40/14.25 V(Min) Circuit of Figure 2 15.45/15.60 15.60/15.75 V(Max) 14.55/14.40 14.40/14.25 V(Min) 15.525/15.675 15.68/15.83 V(Max) Output Voltage 0.2A ≤ ILOAD ≤ 1A, LM2575HV 18V ≤ VIN ≤ 60V 15 Efficiency http://www.hgsemi.com.cn V 15 Circuit of Figure 2 η V VIN = 18V, ILOAD = 1A 88 4 V % 2018 NOV LM1575/LM2575/LM2575HV LM1575-ADJ, LM2575-ADJ, LM2575HV-ADJ Electrical Characteristics Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions Typ LM1575-ADJ LM2575-ADJ Units LM2575HV-ADJ (Limits) Limit Limit (Note 2) (Note 3) SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 VOUT VOUT VOUT η Feedback Voltage VIN = 12V, ILOAD = 0.2A 1.230 V VOUT = 5V 1.217 1.217 V(Min) Circuit of Figure 2 1.243 1.243 V(Max) Feedback Voltage 0.2A ≤ ILOAD ≤ 1A, LM1575/LM2575 8V ≤ VIN ≤ 40V 1.205/1.193 1.193/1.180 V(Min) VOUT = 5V, Circuit of Figure 2 1.255/1.267 1.267/1.280 V(Max) 1.230 V Feedback Voltage 0.2A ≤ ILOAD ≤ 1A, LM2575HV 8V ≤ VIN ≤ 60V 1.205/1.193 1.193/1.180 V(Min) VOUT = 5V, Circuit of Figure 2 1.261/1.273 1.273/1.286 V(Max) Efficiency 1.230 VIN = 12V, ILOAD = 1A, VOUT = 5V V 77 % 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 = 200 mA. Symbol Parameter Conditions Typ LM1575-XX LM2575-XX Units LM2575HV-XX (Limits) Limit Limit (Note 2) (Note 3) 100/500 100/500 DEVICE PARAMETERS Ib Feedback Bias Current VOUT = 5V (Adjustable Version Only) 50 fO Oscillator Frequency (Note 13) 52 VSAT DC ICL IL Saturation Voltage Max Duty Cycle (ON) Current Limit Output Leakage IOUT = 1A (Note 5) Current ISTBY Quiescent Current Standby Quiescent Output = 0V Output = −1V (Note 7) 58/62 58/63 kHz(Max) 1.2/1.4 1.2/1.4 V(Max) 93 93 %(Min) V % A 1.7/1.3 1.7/1.3 A(Min) 3.0/3.2 3.0/3.2 A(Max) 2 2 mA(Max) 30 30 mA(Max) 10/12 10 mA(Max) 200/500 200 µA(Max) 7.5 mA 5 ON /OFF Pin = 5V (OFF) mA 50 Current http://www.hgsemi.com.cn kHz(Min) 2.2 Output = −1V IQ 47/42 98 Peak Current (Notes 5, 13) (Notes 7, 8) 47/43 0.9 (Note 6) 5 nA kHz µA 2018 NOV LM1575/LM2575/LM2575HV All Output Voltage Versions Electrical Characteristics (Continued) 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 = 200 mA. Symbol Parameter Conditions Typ LM1575-XX LM2575-XX Units LM2575HV-XX (Limits) Limit Limit (Note 2) (Note 3) DEVICE PARAMETERS θJA T Package, Junction to Ambient (Note 9) 65 θJA Thermal Resistance T Package, Junction to Ambient (Note 10) 45 θJC T Package, Junction to Case 2 θJA N Package, Junction to Ambient (Note 11) 85 θJA M Package, Junction to Ambient (Note 11) 100 θJA S Package, Junction to Ambient (Note 12) 37 ˚C/W ON /OFF CONTROL Test Circuit Figure 2 VIH ON /OFF Pin Logic VOUT = 0V 1.4 2.2/2.4 2.2/2.4 V(Min) VIL Input Level VOUT = Nominal Output Voltage 1.2 1.0/0.8 1.0/0.8 V(Max) ON /OFF Pin Input ON /OFF Pin = 5V (OFF) 12 30 30 µA(Max) 10 10 µA(Max) IIH Current IIL ON /OFF Pin = 0V (ON) µA 0 µA 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). All limits are used to calculate Average Outgoing Quality Level, and all are 100% production tested. Note 3: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. Note 4: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM1575/LM2575 is used as shown in the Figure 2 test circuit, system performance will be as shown in system parameters section of Electrical Characteristics. Note 5: Output (pin 2) sourcing current. No diode, inductor or capacitor connected to output pin. Note 6: Feedback (pin 4) removed from output and connected to 0V. Note 7: Feedback (pin 4) 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 8: VIN = 40V (60V for the high voltage version). Note 9: Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with 1⁄2 inch leads in a socket, or on a PC board with minimum copper area. Note 10: Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with 1⁄2 inch leads soldered to a PC board containing approximately 4 square inches of copper area surrounding the leads. Note 11: Junction to ambient thermal resistance with approximately 1 square inch of pc board copper surrounding the leads. Additional copper area will lower thermal resistance further. See thermal model in Switchers made Simple software. Note 12: If the TO-263 package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package: Using 0.5 square inches of copper area, θJA is 50˚C/W; with 1 square inch of copper area, θJA is 37˚C/W; and with 1.6 or more square inches of copper area, θJA is 32˚C/W. Note 13: The oscillator frequency reduces to approximately 18 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 protection feature lowers the average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%. http://www.hgsemi.com.cn 6 2018 NOV LM1575/LM2575/LM2575HV Typical Performance Characteristics (Circuit of Figure 2) Normalized Output Voltage Line Regulation Dropout Voltage Current Limit Quiescent Current Standby Quiescent Current http://www.hgsemi.com.cn 7 2018 NOV LM1575/LM2575/LM2575HV Typical Performance Characteristics (Circuit of Figure 2) (Continued) Oscillator Frequency Switch Saturation Voltage Efficiency Minimum Operating Voltage Quiescent Current vs Duty Cycle Feedback Voltage vs Duty Cycle http://www.hgsemi.com.cn 8 2018 NOV LM1575/LM2575/LM2575HV Typical Performance Characteristics (Circuit of Figure 2) (Continued) Feedback Pin Current Maximum Power Dissipation (TO-263) (See (Note 12)) Switching Waveforms Load Transient Response VOUT = 5V A: Output Pin Voltage, 10V/div B: Output Pin Current, 1A/div C: Inductor Current, 0.5A/div D: Output Ripple Voltage, 20 mV/div, AC-Coupled Horizontal Time Base: 5 µs/div 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. Test Circuit and Layout Guidelines 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. http://www.hgsemi.com.cn 9 2018 NOV LM1575/LM2575/LM2575HV Test Circuit and Layout Guidelines (Continued) Fixed Output Voltage Versions CIN — 100 µF, 75V, Aluminum Electrolytic COUT — 330 µF, 25V, Aluminum Electrolytic D1 — Schottky, 11DQ06 L1 — 330 µH, PE-52627 (for 5V in, 3.3V out, use 100 µH, PE-92108) Adjustable Output Voltage Version where VREF = 1.23V, R1 between 1k and 5k. R1 — 2k, 0.1% R2 — 6.12k, 0.1% FIGURE 2. http://www.hgsemi.com.cn 10 2018 NOV