CBM2576-XX COREBAI | Alldatasheet

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www.corebai.com CBM2576-XX OPERATION INSTRUCTION

FEATURES

 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions  Adjustable Version Output Voltage Range,1.23 to 37 V ±4%  Maximum Over Line and Load Conditions  Guaranteed 3.0 A Output Current  Wide Input Voltage Range  Requires Only 4 External Components  52 kHz Fixed Frequency Internal Oscillator  TTL Shutdown Capability, Low Power Standby Mode  High Efficiency  Uses Readily Available Standard Inductors  Thermal Shutdown and Current Limit Protection

APPLICATIONS

 Simple High–Efficiency Step–Down (Buck) Regulator  Efficient Pre–Regulator for Linear Regulators  On–Card Switching Regulators  Positive to Negative Converter (Buck–Boost)  Negative Step–Up Converters  Power Supply for Battery Chargers GENERAL DESCRIPTION The CBM2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step–down switching regulator (buck converter). All circuits of this series are capable of driving a 3.0 A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version. These regulators were designed to minimize the number of external components to simplify the power supply design. Standard series of inductors optimized for use with the CBM2576 are offered by several different inductor manufacturers. Since the CBM2576 converter is a switch–mode power supply, its efficiency is significantly higher in comparison with popular three–terminal linear regulators, especially with higher input voltages. In many cases, the power dissipated is so low that no heatsink is required or its size could be reduced dramatically. A standard series of inductors optimized for use with the CBM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch–mode power supplies. The CBM2576 features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency (±2% over 0℃ to 125℃). External shutdown is included, featuring 80 ㎂ (typical) standby current. The output switch includes cycle–by–cycle current limiting, as well as thermal shutdown for full protection under fault conditions. A ll data sheet.com

www.corebai.com CBM2576-XX OPERATION INSTRUCTION ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.) Rating Symbol Value Unit Maximum Supply Voltage Vin 45 V ON/OFF Pin Input Voltage - -0.3V≤V≤+Vin V Output Voltage to Ground (Steady–State) - -1.0 V Power Dissipation TO–220, 5–Lead PD Internally Limited W Thermal Resistance, Junction–to–Ambient RθJA 65 ℃/W Thermal Resistance, Junction–to–Case RθJC 5.0 ℃/W TO–263, 5–Lead (D2PAK) PD Internally Limited W Thermal Resistance, Junction–to–Ambient RθJA 70 ℃/W Thermal Resistance, Junction–to–Case RθJC 5.0 ℃/W Storage Temperature Range Tstg –65℃ to +150℃ ℃ 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. A ll data sheet.com

www.corebai.com CBM2576-XX OPERATION INSTRUCTION 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 40 V SYSTEM PARAMETERS[Note 1]

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, Vin=25V for the 12V version, and Vin=30V for the 15V version. I Load=500mA, TJ=25℃, for min/max values TJ is the operating junction temperature range that applies [Note 2], unless otherwise noted.) Characteristics Symbol Min Max Unit CBM2576–3.3 ([Note 1] Test Circuit Figure 3) Output Voltage Vout 3.234 3.366 V Output Voltage (6.0V≤Vin≤40V, 0.5A≤I Load≤3.0A) Vout V TJ = 25℃ 3.168 3.432 TJ = –40 to +125℃ 3.135 3.465 Efficiency (Vin=12V, ILoad = 3.0A) η 65 - % CBM2576–5 [Note 1] Output Voltage Vout 4.9 5.1 V Output Voltage (8.0V≤Vin≤40V, 0.5A≤I Load≤3.0A) Vout V TJ = 25℃ 4.8 5.2 TJ = –40℃ to +125℃ 4.75 5.25 Efficiency (Vin = 12V, I Load = 3.0A) η 67 - % CBM2576–12 [Note 1] Output Voltage Vout 11.76 12.24 V Output Voltage (15.0V≤Vin≤40V, 0.5A≤I Load≤3.0 A) Vout V TJ = 25℃ 11.52 12.48 TJ = –40℃ to +125℃ 11.4 12.6 A ll data sheet.com

www.corebai.com CBM2576-XX OPERATION INSTRUCTION Efficiency (Vin = 12V, I Load = 3.0A) η 78 - % CBM2576–15 [Note 1] Output Voltage Vout 14.7 15.3 V Output Voltage (18V≤Vin≤40V, 0.5A≤I Load≤3.0A) Vout V TJ = 25℃ 14.4 15.6 TJ = –40℃ to +125℃ 14.25 15.75 Efficiency (Vin = 12V, I Load = 3.0A) η 75 - % CBM2576 ADJUSTABLE VERSION[Note 1] Feedback Voltage (Vin=12V, I Load=0.5A, VOUT=5.0V, TJ=25℃) Vout 1.217 1.243 V Feedback Voltage (8.0V≤Vin≤40V, 0.5A≤I Load≤3.0A,VOUT=5.0 V) Vout V TJ= 25℃ 1.193 1.267 TJ = –40℃ to +125℃ 1.18 1.28 Efficiency (Vin = 12V, I Load=3.0A, VOUT=5.0V) η 67 - % 1. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the CBM2576 is used as shown in the test circuit, system performance will be as shown in system parameters section . 2. Tested junction temperature range for the CBM2576: T low = –40℃ Thigh = +125℃ A ll data sheet.com

www.corebai.com CBM2576-XX OPERATION INSTRUCTION DEVICE PARAMETERS (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 T J is the operating junction temperature range that applies [Note 2], unless otherwise noted.) Characteristics Symbol Min Max Unit ALL OUTPUT VOLTAGE VERSIONS Feedback Bias Current (Vout = 5.0V [Adjustable Version Only]) Ib nA TJ = 25℃ - 100 TJ = –40℃ to +125℃ - 500 Oscillator Frequency [Note 3] fosc kHz TJ = 25℃ - - TJ = –40℃ to +125℃ 42 63 Saturation Voltage (Iout = 3.0 A [Note 4]) Vsat V TJ = 25℃ - 1.8 Max Duty Cycle (“on”) [Note 5] DC 93 - % Current Limit (Peak Current [Notes 3 and 4]) ICL A TJ = 25℃ 4.2 6.9 Output Leakage Current [Notes 6 and 7], T J = 25℃ IL mA Output = 0V - 2.0 Output = –1.0V - 30 Quiescent Current [Note 6] IQ mA TJ = 25℃ - 10 Standby Quiescent Current (ON/OFF Pin = 5.0 V (“off”)) Istby uA TJ = 25℃ - 200 ON/OFF Pin Logic Input Level V Vout = 0V VIH A ll data sheet.com

www.corebai.com CBM2576-XX OPERATION INSTRUCTION TJ = 25℃ 2.2 - Vout = Nominal Output Voltage VIL TJ = 25℃ - 1.0 ON/OFF Pin Input Current uA ON/OFF Pin = 5.0 V (“off”), T J = 25℃ IIH - 30 ON/OFF Pin = 0 V (“on”), T J = 25℃ IIL - 10 3. 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 dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%. 4. Output (Pin 2) sourcing current. No diode, inductor or capacitor connected to output pin. 5. Feedback (Pin 4) removed from output and connected to 0 V. 6. Feedback (Pin 4) removed from output and connected to +12 V for the Adjustable, 3.3 V, and 5.0 V versions, and +25 V for the 12 V and 15 V versions, to force the output transistor “off”. 7. Vin = 40 V. A ll data sheet.com

Note: Heat sink may be required. FIGURE 6. Negative Boost high, especially at low input voltages. so some other means (such as a fuse) may be necessary.

www.corebai.com CBM2576-XX 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 CBM2576 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 CBM2576-XX OPERATION INSTRUCTION PACKAGE TO-220-5L Symbol Dimensions In Millimeters Dimensions Inches Min Nom Max Min Nom Max A ll data sheet.com

www.corebai.com CBM2576-XX OPERATION INSTRUCTION TO-263-5L Symbol Dimensions In Millimeters Dimensions Inches Min Nom Max Min Nom Max A ll data sheet.com

www.corebai.com CBM2576-XX OPERATION INSTRUCTION PACKAGE/ORDERING INFORMATION PRODUCT ORDERING NUMBER TEMPRANGE PACKAGE PAKEAGE MARKING TRANSPOT MEDIA,QUANTILY CBM2576 CBM2576T-ADJ -40℃~125℃ TO-220 2576T-ADJ Tape and Reel,46 CBM2576DT-ADJ -40℃~125℃ TO-263-5 2576DT-ADJ Tape and Reel,800 CBM2576-3.3 CBM72576T-3.3 -40℃~125℃ TO-220 2576T-3.3 Tape and Reel,46 CBM2576DT-3.3 -40℃~125℃ TO-263-5 2576DT-3.3 Tape and Reel,500 CBM2576-5 CBM2576T-5.0 -40℃~125℃ TO-220 2576T-5.0 Tape and Reel,46 CBM2576DT-5.0 -40℃~125℃ TO-263-5 2576DT-5.0 Tape and Reel,500 CBM2576-12 CBM2576T-12 -40℃~125℃ TO-220 2576T-12 Tape and Reel,46 CBM2576DT-12 -40℃~125℃ TO-263-5 2576DT-12 Tape and Reel,500 CBM2576-15 CBM2576T-15 -40℃~125℃ TO-220 2576T-15 Tape and Reel,46 CBM2576DT-15 -40℃~125℃ TO-263-5 2576DT-15 Tape and Reel,500 A ll data sheet.com