LM1501AT

5.0A, 150kHz, Step-down Switching Regulator FEATURES 3.3V, 5V, 12V, and adjustable output versions Adjustable version output voltage range, 1.23V to 37V ± 3% max over line and load conditions Guaranteed 5A output load current Input voltage range up to 40V Requires only 4 external components 150kHz ±15% fixed frequency internal oscillator Excellent line and Load regulation specifications Low power standby mode, IQ typically 80uA Thermal shutdown and current limit protection TO-263 PKG LM1501A TO-220 PKG APPLICATION Simple high-efficiency step-down regulator On-card switching regulators Positive to negative converter Ordering Information Device(Marking) LM1501AR-X.X LM1501AT-X.X X.X = Output Voltage = 3.3, 5.0, 12, ADJ PKG TO-263 5L TO-220 5L DESCRIPTION The LM1501A series of regulators are monolithic integrated circuits that provide all the active functions for a step-down switching regulator, capable of driving a 5A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use. The LM1501A series operates at a switching frequency of 150kHz. Available in standard 5-lead TO-263 and TO-220 package. Other features include a guaranteed ± 3% tolerance on output voltage under specified input voltage and output load conditions, and ± 15% on the oscillator frequency. External shutdown is included, featuring typically 80uA standby current. Self protection features include a current limit for output switch and an over temperature shutdown for complete protection under fault conditions. The over temperature shutdown level is about 145℃ with 5℃ hysteresis. Absolute Maximum Ratings (TA = 25oC) (Note 1) Characteristic Maximum Input Supply Voltage ON/OFF Pin Input Voltage Feedback Pin Voltage Output Voltage to Ground Power Dissipation Storage Temperature Range Operating Temperature Range ESD Susceptibility (Human Body Model) Operating Supply Voltage Symbol VI VIN VFB VO PD Tstg TJ VESD VIN Value 45 -0.3 ≤ V ≤ +25 -0.3 ≤ V ≤ +25 -1 Internally limited -65 to +150 -40 ≤ TJ ≤ +125 2 4.5 to 45 Unit V V V V W o C o C kV V Note 1. Absolute Maximum Rating indicate limits beyond which damage to 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. Mar. 2011 – Ver. 1.3 1 HTC 5.0A, 150kHz, Step-down Switching Regulator Ordering Information VOUT ADJ LM1501A Supplied As Reel Tube Reel Tube Reel Tube Reel Tube Package TO-263 5L TO-220 5L TO-263 5L TO-220 5L TO-263 5L TO-220 5L TO-263 5L TO-220 5L Order No. LM1501AR-ADJ-5L LM1501AT-ADJ-5L LM1501AR-3.3-5L LM1501AT-3.3-5L LM1501AR-5.0-5L LM1501AT-5.0-5L LM1501AR-12-5L LM1501AT-12-5L Description 5A, 150KHz 5A, 150KHz 5A, 150KHz 5A, 150KHz 5A, 150KHz 5A, 150KHz 5A, 150KHz 5A, 150KHz Package Marking LM1501A-ADJ LM1501A-ADJ LM1501A-3.3 LM1501A-3.3 LM1501A-5.0 LM1501A-5.0 LM1501A-12 LM1501A-12 3.3V 5.0V 12V LM 1501A R – 3.3 V – 5 L Lead Count : 5L Output Voltage : ADJ / 3.3V / 5.0V / 12V Package Type Root Name Product Code R : TO-263 T : TO-220 PIN CONFIGURATION SD FB GND OUTPUT VIN SD FB GND OUTPUT VIN TO-263 5L TO-220 5L PIN DESCRIPTION Pin No. 1 2 3 4 5 TO-263 / TO-220 5 LEAD Name VIN OUTPUT GND FB SD Function Operating Input Voltage Switching Output Voltage Ground Output Voltage Feedback Control ON/OFF Shutdown Mar. 2011 – Ver. 1.3 2 HTC 5.0A, 150kHz, Step-down Switching Regulator Electrical Characteristics LM1501A Unless otherwise specified, TJ=25℃ VIN= 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the 12V version. ILOAD = 500mA. Characteristic Symbol Test Condition LM1501A -ADJ Min Typ 73 73 80 90 Max Unit VoUT = 3V, ILOAD = 5A VIN = 12V, ILOAD = 5A VIN = 12V, ILOAD = 5A VIN = 25V, ILOAD = 5A 4.75V ≤ VIN ≤ 40V 0.2A ≤ ILOAD ≤ 5A 7V ≤ VIN ≤ 40V 0.2A ≤ ILOAD ≤ 5A 15V ≤ VIN ≤ 40V 0.2A ≤ ILOAD ≤ 5A 4.5V ≤ VIN ≤ 40V 0.2A ≤ ILOAD ≤ 5A VOUT programmed for 3V 3.20 4.85 11.64 Efficiency η LM1501A-3.3 LM1501A-5 LM1501A-12 LM1501A-3.3 % 3.3 5.0 12.0 3.40 5.15 12.36 V Output Voltage VOUT LM1501A-5 LM1501A-12 Feedback Voltage Oscillator Frequency Feedback Current Bias VFB fO ID VSAT DC LM1501A-ADJ 1.180 127 1.215 150 15 1.250 173 50 1.4 V kHz LM1501A-ADJ; VFB=1.215V IOUT = 5A (Note 2,3) (Note 3) (Note 4) Peak Current (Note 2,3) Output = 0V Output = -1V, VIN=40V (Note 4) ON/OFF pin = 5V(OFF), VIN = 40V Saturation Voltage Max Duty Cycle (ON) Max Duty Cycle (OFF) Current Limit Output Leakage Current Quiescent Current Standby Quiescent Current ON/OFF Pin Logic Input Threshold voltage ON/OFF Pin Logic Input current V % 100 0 6.5 50 2 4.5 80 1.3 30 10 200 ICL A μA mA mA μA IL IQ ISTBY VIH VIL IH IL Low(Regulator ON) High (Regulator OFF) VLOGIC = 2.5V (regulator OFF) VLOGIC = 0.5V (regulator ON) 2.0 5 0.6 V 15 5 uA Note 2. No elements connected to output pin Note 3. Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 4. Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the A version, and 15V for the 12V version. To force the output transistor switch OFF Mar. 2011 – Ver. 1.3 3 HTC 5.0A, 150kHz, Step-down Switching Regulator TYPICAL APPLICATION - Fixed Application Circuit Unregulated DC Input 12V VIN 1 LM1501A Feedback 4 LM1501A-5.0 Output CIN 680uF ON/OFF 2 5 L1 33uH 5V COUT 220uF GND 3 D1 1N5824 Regulated Output 5A Load - Adjustable Application Circuit Unregulated DC Input 12V VIN 1 Feedback 4 LM1501A-ADJ Output 2 L1 33uH 5V R2 COUT 220uF CIN 680uF Regulated Output 5A Load ON/OFF 5 GND 3 D1 1N5824 R1 TYPICAL OPERATING CHARACTERISTICS T.B.D APPLICATION INFORMAION T.B.D Mar. 2011 – Ver. 1.3 4 HTC