CBM2576HVS-3.3 COREBAI | Alldatasheet
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Technical content
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION
FEATURES
3.3 V, 5.0 V, 12 V, and Adjustable Output Versions Adjustable version output voltage range, 1.23V to 57V 土 4% max over line and load conditions Output load current: 3A Input voltage range up to 60V Requires only 4 external components 52 kHz fixed frequency internal oscillator TTL shutdown capability, low power standby mode High efficiency Thermal shutdown and current limit protection Built-in switching transistor on chip 5-lead T0-220 package
APPLICATIONS
Simple High-Efficiency Step-Down (Buck) Regulator Efficient Pre-Regulator for Linear Regulators On-Ca「d Switching Regulators Positive to Negative Converter (Buck-Boost) Negative Step-Up Converters Power Supply for Battery Chargers GENERAL DESCRIPTION The CBM2576HVSseries 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, and adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixedfrequency oscillator. The CBM2576HVSseries 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 CBM2576HVSare available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a guaranteed 士 4% tolerance on output voltage within specified input voltages and output load conditions, and 士 10% on the oscillator frequency. The external shutdown function can be controlled by logic level and then come into standby mode. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. The CBM2576HVSseries a「e available in a standard 5-lead T0-220 package. A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION Block diagram Figure 1. 3.3V R2 = 2.02k 5.0V, R2 = 3.69k 12V, R2 = 10.56k For adjustable version R1 = Open, R2 = on Typical Electrical Parameters Parameter, unit Symbol Typ. value Test condition Efficiency,% CBM2576HVS-ADJ 77 VIN = 12V, ILOAD = 3A, V OUT = 5V CBM2576HVS-3.3 75 VIN = 12V, ILOAD = 3A CBM2576HVS-5.0 77 CBM2576HVS-12 88 VIN = 15V, ILOAD = 3A Max. Duty Cycle {ON), % DCmax 98 VFB = 0V A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.) Rating Symbol Value Unit Maximum Supply Voltaqe Vin 63 V ON/OFF Pin Input Voltage -0.3V ≤ V ≤ +25 V Output Voltaoe to Ground (Steadv-State) -0.1 V Power Dissipation TO-220,5-Lead Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case T0-263, 5-Lead (D2PAK) Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case PD RθJA RθJC PD RθJA RθJC Internally Limited 5.0 Internally Limited 5.0 W ℃/W ℃/W W ℃/W ℃/W Storage Temperature Range Tstg ℃ Minimum ESD Rating (Human Body Model: C=100pF,R=1.5kΩ) 2.0 kV Lead Temperature (Soldering, 10 seconds) 260 ℃ Maximum Junction Temperature TJ 150 ℃ * Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. OPERATING RATINGS (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.) Rating Symbol Value Unit Operating Junction Temperature Range TJ -40 to +125 ℃ Supply Voltage VIN 60 V A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, Vin = 12V for the 3.3V, 5.0V, and Adjustable version, Vin = 25V for the 12V version, and Vin = 30V for the 15V version. I Load = 500mA, T J = 25℃, for min/max values TJ is the operating junction temperature range that applies unless otherwise noted) IC Parameter, unit Symbol Limit Test condition TA,℃min max CBM2576 HVS-ADJ Feedback bias current, nA IB - 100 500 VFB = 1,3V; VIN= 12V 25±10 125* -40 Oscillator frequency, kHz fOSC 47 VIN= 12V Saturation voltage, V VSAT - 1.8 2,0 VFB = OV; VIN= 12V; IOUT = 3A no external circuit Current limit, A ICL 4.2 3.5 6.9 7.5 VFB = OV; VIN= 12V; 3A ≤ IOUT ≤ 8A no external circuit Output leakage current, mA IL(O) 2 VFB = 12V; VIN= 60V; VOUT = OV no external circuit 25±10 IL(-1) 30 VFB = 12V; VIN= 60V; VOUT =-1V no external circuit Quiescent current, mA IQ 10 VFB = 12V; VIN= 12V Standby quiescent current, uA ISTBY 200 VFB = OV; VIN= 60V; VON/OFF =5V ON/OFF pin low level input voltage (switch on), V VIL 1.0 0.8 FB = 0V; N = 12V 25士10 125* -40 ON/OFF pin high level input voltage (switch off), V VIH 2.2 2.4 ON/OFF pin high level input current (switch off}, uA IIH 30 VFB = 0V; VIN= 12V; VON/OFF = 5V 25±10 ON/OFF pin low level input current (switch on), uA IIL 10 VFB = 0V; VIN= 12V; VON/OFF= 0V Feedback voltage, V VFB 1.217 1.243 VIN=12V;ILOAD=0.5A; VOUT = 5V 1.193 1.180 1.273 1.286 8V ≤ VIN ≤ 60V; 0.5A ≤ ILOAD ≤ 3A; VOUT = 5V 25±10 125* -40 A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION IC Parameter, unit Symbol Limit Test condition TA,℃ min max CBM2576 HVS-3.3 Oscillator frequency, kHz fOSC 47 VIN = 12V 25±10 125* -40 Saturation voltage, V VSAT 1.8 2.0 VFB = 0V; VIN = 12V; IOUT = 3A no external circuit Current limit, A ICL 4.2 3.5 6.9 7.5 VFB = 0V; VIN = 12V; 3A ≤ IOUT ≤ 8A; no external circuit Output leakage current, mA IL(0) 2 VFB = 12V; VIN = 60V; 3A ≤ IOUT ≤ 8A no external circuit 25±10 IL(-1) 30 VFB = 12V; VIN = 60V; VOUT = -1V; no external circuit Quiescent current, mA IQ 10 VFB = 12V; VIN = 12V Standby quiescent current, uA lSTBY 200 VFB = 0V; VIN = 60V; VON/OFF = 5V ON/OFF pin low level input voltage (switch on), V VIL 1.0 0.8 VFB = 0V; VIN = 12V 25±10 125* -40 ON/OFF pin high level input voltage (switch off), V VIH 2.2 2.4 ON/OFF pin high level input current (switch off), uA IIH 30 VFB = 0V; VIN = 12V; VON/OFF = 5V 25±10 ON/OFF pin low level input current (switch on), uA IIL - 10 VFB = 0V; VIN = 12V; VON/OFF = 0V Output voltage, V VOUT 3.234 3.366 VIN = 12V; VLOAD=0.5A 3.168 3.135 3.450 3.682 6V ≤ V IN ≤ 60V; 0.5A ≤ ILOAD ≤ 3A 25±10 125* -40 A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION IC Parameter, unit Symbol Limit Test condition TA,℃min max CBM2576 HVS-5.0 Oscillator frequency, kHz fSOC 47 VIN = 12V 25±10 125* -40 Saturation voltage, V VSAT 1.8 2.0 VFB = 0V; VIN = 12V; IOUT = 3A no external circuit Current limit, A ICL 4.2 3.5 6.9 7.5 VFB = 0V; VIN = 12V; 3A ≤ IOUT ≤ 8A no external circuit Output leakage current, mA IL(0) 2 VFB = 12V; VIN = 60V; VOUT = 0A no external circuit 25±10 IL(-1) 30 VFB = 12V; VIN = 60V; VOUT = -1A no external circuit Quiescent current, mA IQ 10 VFB = 12V; VIN = 12V Standby quiescent current, uA ISTBY 200 VFB = 0V; VIN = 60V; VON/OFF = 5V ON/OFF pin low level input voltage (switch on), V VIL 1.0 0.8 VFB = 0V; VIN = 12V 25±10 125* -40 ON/OFF pin high level input voltage (switch off), V VIH 2.2 2.4 ON/OFF pin high level input current (switch off), uA IIH 30 VFB = 0V; VIN = 12V; VON/OFF = 5V 25±10 ON/OFF pin low level input current (switch on), uA IIL 10 VFB = 0V; VIN = 12V; VON/OFF = 0V Output voltage, V VOUT 4.90 5.10 VIN = 12V; ILOAD = 0.5A 4.800 4.750 5.225 5.275 8V ≤ VIN ≤ 60V; 0.5A ≤ ILOAD ≤ 3A 25±10 125* -40 A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION IC Parameter, unit Symbol Limit Test condition TA,℃min max CBM2576 HVS-12 Oscillator frequency, kHz FOSC 47 VIN = 25V 25±10 125* -40 Saturation voltage, V VSAT 1.8 2.0 VFB = 0V; VIN = 25V; IOUT = 3A no external circuit Current limit, A ICL 4.2 3.5 6.9 7.5 VFB = 0V; VIN = 25V; 3A ≤ IOUT ≤ 8A no external circuit Output leakage current, mA IL(0) 2 VFB = 25V; VIN = 60V; VOUT = 0V no external circuit 25±10 IL(-1) 30 VFB = 25V; VIN = 60V; VOUT = -1V no external circuit Quiescent current, mA IQ 10 VFB = 25V; VIN = 25V Standby quiescent current, uA ISTBY 200 VFB = 0V; VIN = 60V; VON/OFF = 5V ON/OFF pin low level input voltage (switch on), V VIL 1.0 0.8 VFB = 0V; VIN = 25V 25±10 125* -40 ON/OFF pin high level input voltage (switch off), V VIH 2.2 2.4 ON/OFF pin high level input current (switch off), uA IIH 30 VFB = 0V; VIN = 25V; VON/OFF = 5V 25±10 ON/OFF pin low level input current (switch on), uA IIL 10 VFB = 0V; VIN = 25V; VON/OFF = 0V Output voltage, V VOUT 11.76 12.24 VIN = 25V; ILOAD = 0.5A 11.52 11.40 12.54 12.66 15V ≤ VIN ≤ 60V; 0.5A ≤ ILOAD ≤ 3A 25±10 125* -40 * Junction temperature. Junction temperature is equal to ambient because of measurements of electric parameters are executed in pulse mode. A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION
Application Information
Figure 4 shows a CBM2576-12 in a buck-boost configuration to generate a negative 12V output from a positive input voltage. This circuit bootstraps the regulator's ground pin to the negative output voltage, then by grounding the feedback pin, the regulator senses the inverted output voltage and regulates it to -12V. For an input voltage of 12V or more, the maximum available output current in this configuration is approximately 700 mA. At lighter loads, the minimum input voltage required drops to approximately 4.7V. The switch currents in this buck-boost configuration are higher than in the standard buck-mode design, thus lowering the available output current. Also, the start-up input current of the buck-boost converter is higher than the standard buck-mode regulator, and this may overload an input power source with a current limit less than 5A. Using a delayed turn-on or an undervoltage lockout circuit (described in the next section) would allow the input voltage to rise to a high enough level before the switcher would be allowed to turn on. Because of the structural differences between the buck and the buck-boost regulator topologies, the buck regulator design procedure section can not be used to to select the inductor or the output capacitor. The recommended range of inductor values for the buck-boost design is between 68µH and 220µH, and the output capacitor values must be larger than what is normally required for buck designs. Low input voltages or high output currents require a large value output capacitor (in the thousands of micro Farads). The peak inductor current, which is the same as the peak switch current, can be calculated from the following formula: Ip ≈ ILOAD VIN VO VIN VIN|VO| VIN |VO| × LFOSC Where f OSC = 52 kHz. Under normal continuous inductor current operating conditions, the minimum V IN represents the worst case. Select an inductor that is rated for the peak current anticipated. A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION Definition of Terms BUCK REGULATOR A switching regulator topology in which a higher voltage is converted to a lower voltage. Also known as a step-down switching regulator. BUCK-BOOST REGULATOR A switching regulator topology in which a positive voltage is converted to a negative voltage without a transformer. DUTY CYCLE (D) Ratio of the output switch's on-time to the oscillator period. for buck regulator D = tON T VOUT VIN for buck-boost regulator D = tON T = |VO| |VO|VIN CATCH DIODE OR CURRENT STEERING DIODE The diode which provides a return path for the load current when the IL2576 switch is OFF. EFFICIENCY (η) The proportion of input power actually delivered to the load. η =POUT PIN ≈ POUT POUT PLOSS A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION
PACKAGE INFORMATION
DIMENSIONS IN MILLIMETERS DIMENSIONS IN INCHES MIN NOM MAX MIN NOM MAX A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION TO-263-5L SYMBOL DIMENSIONS IN MILLIMETERS DIMENSIONS IN INCHES MIN NOM MAX MIN NOM MAX L2 2.92 0.115 A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION TO-220-5L(Bent Staggered) SYMBOL DIMENSIONS IN MILLIMETERS DIMENSIONS IN INCHES MIN NOM MAX MIN NOM MAX d1 1.0 0.039 d2 6.3 0.248 H1 6.4 0.250 J1 2.7 0.105 J3 8.4 0.331 A ll data sheet.com
www.corebai.com CBM2576HVS-3.3/5.0/12/ADJ OPERATION INSTRUCTION PACKAGE/ORDERING INFORMATION PRODUCT ORDERING NUMBER TEMPRANG E PACKAGE PAKEAGE MARKING TRANSPOT MEDIA,QUANTILY CBM2576 CBM2576HVT-ADJ -40℃~125℃ TO-220 2576HVT-ADJ Tape and Reel,46 CBM2576HVS-ADJ -40℃~125℃ TO-263-5 2576HVS-ADJ Tape and Reel,500 CBM2576-3.3 CBM72576HVT-3.3 -40℃~125℃ TO-220 2576HVT-3.3 Tape and Reel,46 CBM2576HVS-3.3 -40℃~125℃ TO-263-5 2576HVS-3.3 Tape and Reel,500 CBM2576-5 CBM2576HVT-5.0 -40℃~125℃ TO-220 2576HVT-5.0 Tape and Reel,46 CBM2576HVS-5.0 -40℃~125℃ TO-263-5 2576HVS-5.0 Tape and Reel,500 CBM2576-12 CBM2576HVT-12 -40℃~125℃ TO-220 2576HVT-12 Tape and Reel,46 CBM2576HVS-12 -40℃~125℃ TO-263-5 2576HVS-12 Tape and Reel,500 A ll data sheet.com