5.0A, 300kHz, Step-down Switching Regulator LM1501B 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 300kHz ±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 LM1501BR-X.X LM1501BT-X.X PKG TO-263 5L TO-220 5L X.X = Output Voltage = 3.3, 5.0, 12, ADJ DESCRIPTION The LM1501B 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 LM1501B series operates at a switching frequency of 300kHz. Available in standard 5-lead TO-263 and TO-220 packages. 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 Value Unit VI VIN VFB VO PD Tstg TJ VESD VIN 45 -0.3 ≤ V ≤ +25 -0.3 ≤ V ≤ +25 -1 Internally limited -65 to +150 -40 ≤ TJ ≤ +125 2 4.5 to 45 V V V V W o C o C kV V Note 1. Absolute Maximum Rating 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. Mar. 2011 – Ver. 1.2 1 HTC 5.0A, 300kHz, Step-down Switching Regulator LM1501B Ordering Information VOUT ADJ 3.3V 5.0V 12V Package Order No. Description Package Marking Supplied As TO-263 5L LM1501BR-ADJ-5L 5A, 300kHz LM1501B-ADJ Reel TO-220 5L LM1501BT-ADJ-5L 5A, 300kHz LM1501B-ADJ Tube TO-263 5L LM1501BR-3.3-5L 5A, 300kHz LM1501B-3.3 Reel TO-220 5L LM1501BT-3.3-5L 5A, 300kHz LM1501B-3.3 Tube TO-263 5L LM1501BR-5.0-5L 5A, 300kHz LM1501B-5.0 Reel TO-220 5L LM1501BT-5.0-5L 5A, 300kHz LM1501B-5.0 Tube TO-263 5L LM1501BR-12-5L 5A, 300kHz LM1501B-12 Reel TO-220 5L LM1501BT-12-5L 5A, 300kHz LM1501B-12 Tube LM 1501B 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. Mar. 2011 – Ver. 1.2 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 2 HTC 5.0A, 300kHz, Step-down Switching Regulator LM1501B 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 Efficiency Symb ol η Test Condition VOUT Typ LM1501B -ADJ VOUT = 3V, ILOAD = 5A 73 LM1501B-3.3 VIN = 12V, ILOAD = 5A 73 LM1501B-5 VIN = 12V, ILOAD = 5A 80 LM1501B-12 VIN = 25V, ILOAD = 5A 90 4.75V≤VIN≤40V LM1501B-3.3 Output Voltage Min 0.2A≤ILOAD≤5A 7V≤VIN≤40V LM1501B-5 0.2A≤ILOAD≤5A 15V≤VIN≤40V LM1501B-12 0.2A≤ILOAD≤5A Max Unit % 3.20 3.3 3.40 4.85 5 5.15 11.64 12 12.36 1.180 1.215 1.250 255 300 345 kHz 15 50 nA 1.4 V V 4.5V≤VIN≤40V Feedback Voltage VFB 0.2A≤ILOAD≤5A LM1501B-ADJ VOUT programmed for 3V Oscillator Frequency fO Feedback Bias Current ID Saturation Voltage Max Duty Cycle (ON) Max Duty Cycle (OFF) Current Limit Output Leakage Current VSAT DC ICL LM1501B-ADJ; VFB=1.215V IOUT = 5A, (Note 2, 3) (Note 3) 100 (Note 4) 0 Peak Current, (Note 2, 3) 6.5 Output = 0V (Note 2, 4) IL Quiescent Current IQ Standby Quiescent Current ISTBY % 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 ON/OFF Pin Logic Input Threshold voltage ON/OFF Pin Logic Input current 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. 1.2 3 HTC 5.0A, 300kHz, Step-down Switching Regulator LM1501B TYPICAL APPLICATION LM1501B-5.0 TYPICAL OPERATING CHARACTERISTICS T.B.D APPLICATION INFORMAION T.B.D Mar. 2011 – Ver. 1.2 4 HTC