MIK2576T-50

LM2576 ESTEK | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 8

Technical content

Features

• 3.3V, 5V, 12V, 15V, and adjustable output versions
• Adjustable version output voltage range
• 1.23V to 37V (57V for HV version) ±4% max over line and load conditions
• Guaranteed 3A output current
• Wide input voltage range, 40V up to 60V for HV version
• Requires only 4 external components
• 52 kHz fixed frequency 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) Typical application Figure 1.(Fixed Output Voltage Versions) 7V - 40V (60V for HV) UNREGULATED +VIN MIK2576/ MIK2576HV- 5.0 FEEDBACK OUTPUT L1 +5V REGULATED DC INPUT + 3 GND CIN

5 ON/OFF

H 1N5822 + COUT 1000 F OUTPUT LOAD BEIJING ESTEK ELECTRONICS CO.,LTD

3 AMP

1.0k 1.23V COMPARATOR SWITCH OUTPUT VOUT COUT L O A BAND-GAP 52kHZ THERMAL CURRENT D REFERENCE OSCILLATOR RESET SHUTDOWN LIMIT GND 3.3V, R2 =1.7K 5V, R2 = 3.1K 12V, R2 = 8.84K 15V, R2 =11.3K For ADJ, Version R1 = Open, R2 =0Ω

Ordering information

Output Voltage, V Package Type -40°C ≤ TA ≤ 125° C 3.3 5.0 12 15 ADJ MIK2576HVS-3.3 MIK2576HVS-5.0 MIK2576HVS-12 MIK2576HVS-15 MIK2576HVS-ADJ MIK2576S-3.3 MIK2576S-5.0 MIK2576S-12 MIK2576S-15 MIK2576S-ADJ MIK2576HVT-3.3 MIK2576HVT-5.0 MIK2576HVT-12 MIK2576HVT-15 MIK2576HVT- ADJ MIK2576T-3.3 MIK2576T-5.0 MIK2576T-12 MIK2576T-15 MIK2576T-ADJ TO-263 TO-220 BEIJING ESTEK ELECTRONICS CO.,LTD

Absolute Maximum Ratings (Note 1) Parameter Maximum Units Maximum Supply Voltage MIK2576 MIK2576HV V ON/OFF Pin Input Voltage -0.3V ≤ V ≤ +VIN Output Voltage to Ground (Steady State) -1 V Power Dissipation Internally Limited W Storage Temperature Range -65 to +150 ° C Maximum Junction Temperature 150 ° C Minimum ESD Rating (C= 100pF, R = 1.5 kΩ) 2 kV Lead Temperature (Soldering, 10 Seconds) 260 ° C Operating Ratings Temperature Range MIK2576/ MIK2576HV Supply Voltage Parameter Value Units MIK2576 MIK2576HV V Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions SYSTEM P ARAMETERS (Note 3) Test Circuit Figure 2 VOUT Output Voltage VIN =12V, ILOAD =0.5A Circuit of Figure 2 MIK2576-3.3 MIK2576HV -3.3 Typ Limit (Note 2) 3.3 3.234 3.366 Units (Limits) V V(Min) V(Max) VOUT Output Voltage MIK2576 VOUT Output Voltage MIK2576HV 6V ≤ VIN ≤ 40V, 0.5A ≤ ILOAD ≤ 3A Circuit of Figure 2 6V ≤ VIN ≤ 60V, 0.5A ≤ ILOAD ≤ 3A Circuit of Figure 2 3.3 3.3 3.168/3.135 3.432/3.465 3.168/3.135 3.450/3.482 V V(Min) V(Max) V V(Min) V(Max) η Efficiency VIN =12V, ILOAD =3A 75 % Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions SYSTEM P ARAMETERS (Note 3) Test Circuit Figure 2 VOUT Output Voltage VIN =12V, ILOAD =0.5A Circuit of Figure 2 MIK2576-5.0 MIK2576HV -5.0 Typ Limit (Note 2) 5.0 4.900 5.100 Units (Limits) V V(Min) V(Max) VOUT Output Voltage MIK2576 VOUT Output Voltage MIK2576HV 0.5A ≤ ILOAD ≤ 3A, 8V ≤ VIN ≤ 40V Circuit of Figure 2 0.5A ≤ ILOAD ≤ 3A, 8V ≤ VIN ≤ 60V Circuit of Figure 2 5.0 5.0 4.800/4.750 5.200/5.250 4.800/4.750 5.225/5.275 V V(Min) V(Max) V V(Min) V(Max) η Efficiency VIN =12V, ILOAD =3A 77 % BEIJING ESTEK ELECTRONICS CO.,LTD

Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions SYSTEM P ARAMETERS (Note 3) Test Circuit Figure 2 VOUT Output Voltage VIN =25V, ILOAD =0.5A Circuit of Figure 2 MIK2576-12 MIK2576HV -12 Typ Limit(Note 2) 11.76 12.24 Units (Limits) V V(Min) V(Max) VOUT Output Voltage MIK2576 VOUT Output Voltage MIK2576HV 0.5A ≤ ILOAD ≤ 3A, 15V ≤ VIN ≤ 40V Circuit of Figure 2 0.5A ≤ ILOAD ≤ 3A, 15V ≤ VIN ≤ 60V Circuit of Figure 2 11.52/11.40 12.48/12.60 11.52/11.40 12.54/12.66 V V(Min) V(Max) V V(Min) V(Max) η Efficiency VIN =15V, ILOAD =3A 88 % Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions SYSTEM P ARAMETERS (Note 3) Test Circuit Figure 2 VOUT Output Voltage VIN =25, ILOAD =0.5A Circuit of Figure 2 MIK2576-15 MIK2576HV -15 Typ Limit (Note 2) 14.70 15.30 Units (Limits) V V(Min) V(Max) VOUT Output Voltage MIK2576 VOUT Output Voltage MIK2576HV 0.5A ≤ ILOAD ≤ 3A, 18≤ VIN ≤ 40V Circuit of Figure 2 0.5A ≤ ILOAD ≤ 3A, 18 ≤ VIN ≤ 60V Circuit of Figure 2 14.40/14.25 15.60/15.75 14.40/14.25 15.68/15.83 V V(Min) V(Max) V V(Min) V(Max) η Efficiency VIN =18V, ILOAD =3A 88 % Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions SYSTEM P ARAMETERS (Note 3) Test Circuit Figure 2 VOUT Feedback Voltage VIN =12V, ILOAD =0.5A, VOUT =5V Circuit of Figure 2 MIK2576-ADJ MIK2576HV -ADJ Typ Limit(Note 2) 1.230 1.217 1.243 Units (Limits) V V(Min) V(Max) VOUT Feedback Voltage MIK2576 VOUT Feedback Voltage MIK2576HV 0.5A ≤ ILOAD ≤ 3A , 8V ≤ VIN ≤ 40V VOUT =5V Circuit of Figure 2 0.5A ≤ ILOAD ≤ 3A, 8V ≤ VIN ≤ 60V, VOUT =5V Circuit of Figure 2 1.230 1.230 1.193/1.180 1.267/1.280 1.193/1.180 1.273/1.286 V V(Min) V(Max) V V(Min) V(Max) η Efficiency VIN =12V, ILOAD =3A, VOUT =5V 77 % BEIJING ESTEK ELECTRONICS CO.,LTD

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, V IN =25V for the 12V version, and VIN =30V for the 15V version, , ILOAD =500mA. Symbol Parameter Conditions DEVICE PARAMETERS MIK2576-XX MIK2576HV -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 1.8/2.0 4.2/3.5 6.9/7.5 kHz kHz(Min) kHz(Max) V V(Max) %(Min) A A(Min) A(Max) mA(Max) Output = -1V Output = -1V 7.5 mA mA(Max) IQ Quiescent Current (Note 6) 5 mA mA(Max) ISTBY Standby Quiescent Current ___ ON/OFF Pin = 5V (OFF) 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) 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 MIK2576/MIK2576HV 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 =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%. BEIJING ESTEK ELECTRONICS CO.,LTD

Typical Performance Characteristics (Circuit of Figure 2) Normalized Output Voltage Line Regulation Dropout Voltage VIN =20V ILOA D = 500mA Normalized at TJ =25°C ILOA D = 500mA TJ =25° C ILOA D = 3A L1 = 150 H 3.3V, 5V & ADJ 12V & 15V ILOA D = 200mA ILOA D = 1A RIND = 0.1Ω JUNCTION TEMPERATURE (°C) INPUT VOLTAGE (V) JUNCTION TEMPERATURE (°C) Standby Quiescent Current Quiescent Current Current Limit VIN = 25V VIN = 40V VOUT = 5V Measured at Ground Pin VON/OFF = 5V TJ =25° C VIN =12 V ILOAD = 200mA ILOAD = 3A JUNCTION TEMPERATURE (°C) INPUT VOLTAGE (V) JUNCTION TEMPERATURE (°C) Switch Saturation Voltage Efficiency Oscilator Frequency Normalized at 25°C -55°C ILOA D = 3A 15V OUT TJ =25°C ILOA D = 200mA VIN = 40V 25° C 150°C ILOA D = 3A ILOA D = 200mA VIN = 12V SWITCH CURRENT (A) INPUT VOLTAGE (V) JUNCTION TEMPERATURE (° C) Minimum Operating Voltage Quiescent Current vs Duty Cycle Feedback Voltage vs Duty Cycle Adjustable Version Only Adjustable Version Only VIN = 7V Adjustable Version Only ILOAD = 500mA VIN = 40V VOUT ≈1.23V ILOAD = 500mA ILOAD = 500mA VIN = 40V VIN = 7V JUNCTION TEMPERATURE (° C) DUTY CYCLE (%) DUTY CYCLE (%) BEIJING ESTEK ELECTRONICS CO.,LTD

(TO-263) Feedback Pin Current Adjustable Version Only θJA = 32°C/W θJ A = 37°C/W θJ A = 50°C/W θJ A = 73°C/W AMBIENT TEMPERATURE (° C) JUNCTION TEMPERATURE (°C) Switching Waveforms Load Transient Response A B Output Voltage Change C Load Current D 5 s/div 100 s/div VOUT =15V A: Output Pin Voltage, 50V/div B: Output Pin Current, 2A/div C: Inductor Current, 2A/div D: Output Ripple Voltage, 50mV/div, AC-Coupled Horizontal Time Base: 5µs/div BEIJING ESTEK ELECTRONICS CO.,LTD

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. 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 Versions (Figure 2a) UNREGULATED +VIN MIK2576HV- FIXED OUTPUT ON/OFF FEEDBACK OUTPUT 100 H VOUT L OVIN DC INPUT GN100 F D 3 5 + MBR360 COUT 1000 F A D CIN —100µF, 75V, Aluminum Electrolytic COUT —1000µF, 25V, Aluminum Electrolytic D1 —Schottky, MBR360 L1 —100µH, Pulse Eng. PE-92108 R1 —2k, 0.1% R2 —6.12k, 0.1% Adjustable Output Voltage Version (Figure 2b) 7V -60V +VIN 100 F MIK2576HV- ADJ FEEDBACK OUTPUT 100 H VOUT 5.00V L UNREGULATED DC INPUT CIN GND 3 ON/OFF COUT R2 O A MBR360 1000 F R1 D VOUT VREF 1( + R 2 ) R R R (VOUT )12 1 VREF where VREF = 1.23V, R1 between 1k and 5k Address : 6A06--6A07 Rm 6A07,Changyin Office Building ,No.88,Yong Ding Road,Hai Dian District ,Beijing Postalcode:100039 Tel: 86-010-58895780 / 81 / 82 / 83 / 84 Fax : 010-58895793 Http://www.estek.com.cn Email:sales@estek.com.cn REV No:01-060813 BEIJING ESTEK ELECTRONICS CO.,LTD