5.0A, 150kHz, Step-down Switching Regulator LM1501A FEATURES z 3.3V, 5V, 12V, and adjustable output versions z Adjustable version output voltage range, 1.23V to 37V ± 3% max over line and load conditions z Guaranteed 5A output load current z Input voltage range up to 40V z Requires only 4 external components z 150kHz ±15% fixed frequency internal oscillator z Excellent line and Load regulation specifications z Low power standby mode, IQ typically 80uA z Thermal shutdown and current limit protection TO-263 PKG TO-220 PKG APPLICATION z Simple high-efficiency step-down regulator z On-card switching regulators z Positive to negative converter Ordering Information Device(Marking) DESCRIPTION PKG LM1501AR-X.X TO-263 5L LM1501AT-X.X TO-220 5L X.X = Output Voltage = 3.3, 5.0, 12, ADJ 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 Symbol Value Unit Maximum Input Supply Voltage ON/OFF Pin Input Voltage VI VIN 45 -0.3 ≤ V ≤ +25 V V Feedback Pin Voltage VFB -0.3 ≤ V ≤ +25 V Output Voltage to Ground Power Dissipation Storage Temperature Range VO PD Tstg -1 Internally limited -65 to +150 V W o C Operating Temperature Range TJ -40 ≤ TJ ≤ +125 VESD VIN 2 4.5 to 45 ESD Susceptibility (Human Body Model) Operating Supply Voltage 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 LM1501A Ordering Information Package VOUT ADJ 3.3V 5.0V 12V Order No. Description Package Marking Supplied As TO-263 5L LM1501AR-ADJ-5L 5A, 150KHz LM1501A-ADJ Reel TO-220 5L LM1501AT-ADJ-5L 5A, 150KHz LM1501A-ADJ Tube TO-263 5L LM1501AR-3.3-5L 5A, 150KHz LM1501A-3.3 Reel TO-220 5L LM1501AT-3.3-5L 5A, 150KHz LM1501A-3.3 Tube TO-263 5L LM1501AR-5.0-5L 5A, 150KHz LM1501A-5.0 Reel TO-220 5L LM1501AT-5.0-5L 5A, 150KHz LM1501A-5.0 Tube TO-263 5L LM1501AR-12-5L 5A, 150KHz LM1501A-12 Reel TO-220 5L LM1501AT-12-5L 5A, 150KHz LM1501A-12 Tube LM 1501A R – 3.3 V – 5 L Lead Count : 5L Output Voltage : ADJ / 3.3V / 5.0V / 12V Package Type R : TO-263 T : TO-220 Root Name Product Code PIN CONFIGURATION SD FB GND OUTPUT VIN SD FB GND OUTPUT VIN TO-263 5L TO-220 5L PIN DESCRIPTION Pin No. TO-263 / TO-220 5 LEAD Name Function 1 VIN Operating Input Voltage 2 OUTPUT Switching Output Voltage 3 GND Ground 4 FB Output Voltage Feedback Control 5 SD ON/OFF Shutdown Mar. 2011 – Ver. 1.3 2 HTC 5.0A, 150kHz, Step-down Switching Regulator LM1501A Electrical Characteristics 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 η Efficiency Test Condition VOUT Typ LM1501A -ADJ VoUT = 3V, ILOAD = 5A 73 LM1501A-3.3 VIN = 12V, ILOAD = 5A 73 LM1501A-5 VIN = 12V, ILOAD = 5A 80 LM1501A-12 VIN = 25V, ILOAD = 5A 90 4.75V ≤ VIN ≤ 40V LM1501A-3.3 Output Voltage Min 0.2A ≤ ILOAD ≤ 5A 7V ≤ VIN ≤ 40V LM1501A-5 0.2A ≤ ILOAD ≤ 5A 15V ≤ VIN ≤ 40V LM1501A-12 0.2A ≤ ILOAD ≤ 5A Max Unit % 3.20 3.3 3.40 4.85 5.0 5.15 11.64 12.0 12.36 1.180 1.215 1.250 V 127 150 173 kHz 15 50 V 4.5V ≤ VIN ≤ 40V Feedback Voltage VFB LM1501A-ADJ 0.2A ≤ ILOAD ≤ 5A VOUT programmed for 3V Oscillator Frequency fO Feedback Current ID Bias 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 VSAT DC ICL IL IQ ISTBY LM1501A-ADJ; VFB=1.215V IOUT = 5A (Note 2,3) 1.4 (Note 3) 100 (Note 4) 0 Peak Current (Note 2,3) % 6.5 Output = 0V V A 50 μA 2 30 mA (Note 4) 4.5 10 mA ON/OFF pin = 5V(OFF), VIN = 40V 80 200 μA 0.6 V Output = -1V, VIN=40V 1.3 VIH Low(Regulator ON) VIL High (Regulator OFF) IH VLOGIC = 2.5V (regulator OFF) IL VLOGIC = 0.5V (regulator ON) 2.0 5 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 LM1501A TYPICAL APPLICATION - Fixed Application Circuit Unregulated DC Input 12V VIN Feedback 4 1 LM1501A-5.0 L1 33uH Output 5V 2 CIN 680uF ON/OFF GND 5 COUT 220uF D1 1N5824 3 Regulated Output 5A Load - Adjustable Application Circuit Unregulated DC Input 12V VIN Feedback 4 1 LM1501A-ADJ Output L1 33uH 5V 2 CIN 680uF ON/OFF 5 GND 3 D1 1N5824 Regulated Output 5A Load R2 R1 COUT 220uF TYPICAL OPERATING CHARACTERISTICS T.B.D APPLICATION INFORMAION T.B.D Mar. 2011 – Ver. 1.3 4 HTC