TJ1501BGR-ADJ

5A, 300KHz, Step-down Switching Regulator TJ1501B FEATURES        3.3V, 5V, 12V, and adjustable output versions Adjustable version output voltage range Guaranteed 5A output load current Input voltage range up to 40V 300KHz fixed frequency internal oscillator Excellent line and load regulation Thermal shutdown and current limit protection TO-263-5L PKG ORDERING INFORMATION Device Package TJ1501BGR-X.X TO-263-5L X.X = Output Voltage = 3.3, 5.0, 12, ADJ APPLICATION  Simple high-efficiency step-down regulator  On-card switching regulators  Positive to negative converter DESCRIPTION The TJ1501B 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 and they include internal frequency compensation and a fixed-frequency oscillator. The TJ1501B series operates at a switching frequency of 300kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed ±4% 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 two stage frequency reducing current limit for output switch and an over temperature shutdown for complete protection under fault conditions. ABSOLUTE MAXIMUM RATINGS (Note 1) Characteristic Symbol Value Unit VIN 45 -0.3  V  +25 -0.3  V  +25 -1 Internally limited -65 to +150 150 V V V V W o C o C Maximum Input Supply Voltage ON/OFF Pin Input Voltage Feedback Pin Voltage Output Voltage to Ground (Steady State) Power Dissipation Storage Temperature Range Operating Temperature Range Oct. 2016 – Preliminary_R0.0 VON/OFF VFB VOUT PD TSTG TJ -1- HTC 5A, 300KHz, Step-down Switching Regulator TJ1501B RECOMMENDED OPERATING CONDITIONS CHARACTERISTIC Supply Voltage Load Current Junction Temperature SYMBOL MIN. MAX. UNIT VIN - 40 V ILOAD - 5 A TJ -40 125 ℃ ORDERING INFORMATION VOUT Package Order No. Description Status ADJ TO-263-5L TJ1501BGR-ADJ 5A, 300KHz Active 3.3V TO-263-5L TJ1501BGR-3.3 5A, 300KHz Contact Us 5.0V TO-263-5L TJ1501BGR-5.0 5A, 300KHz Contact Us 12V TO-263-5L TJ1501BGR-12 5A, 300KHz Contact Us Oct. 2016 – Preliminary_R0.0 -2- HTC 5A, 300KHz, Step-down Switching Regulator TJ1501B PIN CONFIGURATION ON/OFF FB GND OUTPUT VIN TO-263-5L PIN DESCRIPTION Pin No. TO-263-5L PKG Name Function 1 VIN Operating Input Voltage 2 OUTPUT Switching Output Voltage 3 GND Ground 4 FB Output Voltage Feedback Control 5 ON/OFF ON/OFF Shutdown TYPICAL APPLICATION - Fixed Output Voltage Version - Adjustable Output Voltage Version Oct. 2016 – Preliminary_R0.0 -3- HTC 5A, 300KHz, Step-down Switching Regulator TJ1501B ELECTRICAL CHARACTERISTICS Specification with standard type face are for TJ=25℃, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN=12V for the 3.3V, 5V, and Adjustable version and VIN=24V for the 12V version. ILOAD=500mA Characteristic Symbol Test Condition Min. Typ. Max. (Note 3) (Note 2) (Note 3) Unit SYSTEM PARAMETERS (Note 4) Efficiency  TJ1501BGR-ADJ VIN=12V, ILOAD=5A 80 TJ1501BGR-3.3 VIN=12V, ILOAD=5A 70 TJ1501BGR-5.0 VIN=12V, ILOAD=5A 75 TJ1501BGR-12 VIN=18V, ILOAD=5A 85 TJ1501BGR-3.3 Output Voltage VOUT TJ1501BGR-5.0 TJ1501BGR-12 Feedback Voltage VFB TJ1501BGR-ADJ 5.5V ≤ VIN ≤ 40V 3.168 0.2A ≤ ILOAD ≤ 5A 3.135 8V ≤ VIN ≤ 40V 4.800 0.2A ≤ ILOAD ≤ 5A 4.750 15V ≤ VIN ≤ 40V 11.520 0.2A ≤ ILOAD ≤ 5A 11.400 5.2V ≤ VIN ≤ 40V 1.193 5.0 12 3.432 3.465 5.200 5.250 V 12.480 12.600 1.267 1.23 0.2A ≤ ILOAD ≤ 5A VOUT programmed for 3V 3.3 % 1.180 V 1.280 DEVICE PARAMETERS Feedback Bias Current IFB Adjustable Version Only, VFB=1.3V Oscillator Frequency FO (Note 5) Saturation Voltage VSAT Max Duty Cycle (ON) Max Duty Cycle (ON) DC Min Duty Cycle (OFF) Current Limit Output Leakage Current ICL 15 50 nA 300 345 kHz IOUT=5A (Note 6, 7) 1.65 1.85 V (Note 7) 100 ILOAD ≥ 4A 50 (Note 8) 0 255 Peak Current (Note 6, 7) 6.9 Output=0V (Note 6, 8) IL Quiescent Current IQ Shutdown Current ISHUTDOWN % A 50 A Output=-1V (Note 9) 10 30 mA (Note 8) 5 10 mA ON/OFF pin = 5V(OFF) (Note 9) 80 200 A 0.6 V ON/OFF Control 1.3 ON/OFF Pin Logic Input VIH Low (Regulator ON) VIL High (Regulator OFF) ON/OFF Pin Logic Input IH VLOGIC = 2.5V (regulator OFF) 5 15 current IL VLOGIC = 0.5V (regulator ON) 0.02 5 Threshold voltage Oct. 2016 – Preliminary_R0.0 -4- 2.0 uA HTC 5A, 300KHz, Step-down Switching Regulator TJ1501B Note 1. Absolute Maximum Rating indicate limits beyond which damage to the device may occur. Operating Ratings indicate condition 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: Typical numbers are at 25℃ and represent the most likely norm. Note 3: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). Note 4: External components such as the schottky diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. When the TJ1501B is used as shown in the typical circuit, system performance will be as shown in system parameters section of Electrical Characteristics. Note 5: The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current over-load. Note 6: No diode, inductor or capacitor connected to output pin. Note 7: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 8: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ version, and 15V for the 12V version, to force the output transistor switch OFF. Note 9: VIN = 40V. Oct. 2016 – Preliminary_R0.0 -5- HTC 5A, 300KHz, Step-down Switching Regulator TJ1501B TYPICAL OPERATING CHARACTERISTIC Efficiency vs. IOUT Efficiency vs. IOUT VOUT vs. IOUT VOUT vs. IOUT IQ vs. VIN Oct. 2016 – Preliminary_R0.0 IQ vs. VIN -6- HTC 5A, 300KHz, Step-down Switching Regulator VSAT vs. IOUT Oct. 2016 – Preliminary_R0.0 TJ1501B VSAT vs. IOUT -7- HTC 5A, 300KHz, Step-down Switching Regulator TJ1501B APPLICATION INFORMATION 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 wires should be kept as short as possible. Single-point grounding or ground plane construction should be used for best results. Keep the feedback wiring away from the inductor flux - Fixed Output Voltage Version [Figure 1] - Adjustable Output Voltage Version [Figure 2] * VOUT = VFB (1 + Oct. 2016 – Preliminary_R0.0 R1 ) , Where VFB = 1.23V R2 -8- HTC 5A, 300KHz, Step-down Switching Regulator TJ1501B REVISION NOTICE The version of this document is including preliminary information. Thus the description in this datasheet can be revised without any notice to describe its electrical characteristics properly. Its version also can be changed to a production level. Please contact us to get the latest version of datasheet. Oct. 2016 – Preliminary_R0.0 -9- HTC