XRP7659 XRP7659 1.5A 18V 1.4MHz Non Synchronous Step-Down Regulator 1.5A 18V 1.4MHz Non Synchronous Step-Down Regulator November 2019 Rev. 1.2.1 GENERAL DESCRIPTION APPLICATIONS The XRP7659 is a current-mode PWM step- Distributed Power Architectures down (buck) voltage regulator capable of Point of Load Converters delivering an output current up to 1.5Amps. A wide 4.5V to 18V input voltage range allows Audio-Video Equipment for single supply operation from industry Medical & Industrial Equipment standard 5V, 9.6V and 12V power rails. With a 1.4MHz constant operating frequency, FEATURES integrated high-side MOSFET and loop compensation, the XRP7659 reduces the 1.5A Continuous Output Current overall component count and solution 4.5V to 18V Wide Input Voltage footprint. Current-mode control provides fast transient response and cycle-by-cycle current PWM Current-Mode Control limit. An integrated soft-start prevents inrush 1.4MHz Constant Operation current at turn-on, and in shutdown mode the Up to 92% Efficiency supply current drops to 0.1A. Adjustable Output Voltage Built-in output over voltage (open load), over 0.81V to 15V Range temperature, cycle-by-cycle over-current and under voltage lockout (UVLO) protection 3% Accuracy insure safe operation under abnormal Enable Function and Soft Start operating conditions. Built-in Thermal, Over-Current, UVLO The XRP7659 is a pin and function compatible and Output Over-Voltage Protection (VIN<18V) device to Monolithic Power Systems MP2359. Pin/Function Compatible to MP2359 The XRP7659 is offered in a RoHS compliant, RoHS Compliant, Green/Halogen green/halogen free 6-pin SOT-23 package. Free 6-Pin SOT-23 Package TYPICAL APPLICATION DIAGRAM Fig. 1: XRP7659 Application Diagram 1/10 XRP7659 XRP7659 1.5A 18V 1.4MHz Non Synchronous Step-Down Regulator 1.5A 18V 1.4MHz Non Synchronous Step-Down Regulator ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of Input Voltage Range VIN ................................ 4.5V to 18V the device at these ratings or any other above those Maximum Output Current I (Min) ......................... 1.5A OUT indicated in the operation sections of the specifications Ambient Temperature Range ................... -40C to +85C below is not implied. Exposure to absolute maximum Thermal Resistance JA .....................................220C/W rating conditions for extended periods of time may affect reliability. V ............................................................ -0.3V to 20V IN VEN .................................................... -0.3V to VIN+0.3V ....................................................................... 21V VSW V ...................................................... -0.3V to V +6V BS SW VFB .............................................................. -0.3V to 6V Operating Junction Temperature............................ 150C Storage Temperature .............................. -65C to 150C Lead Temperature (Soldering, 10 sec) ................... 260C Power Dissipation ................................ Internally Limited ESD Rating (HBM - Human Body Model) .................... 2kV ESD Rating (MM - Machine Model) ........................... 500V ELECTRICAL SPECIFICATIONS Specifications are for an Operating Junction Temperature of T = 25C only limits applying over the full Operating Junction J Temperature range are denoted by a . Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25C, and are provided for reference purposes only. Unless otherwise indicated, VIN = VEN = 12V, VOUT = 3.3V. Parameter Min. Typ. Max. Units Conditions V , Input Voltage 4.5 18 V IN I , Quiescent Current 0.8 1.1 mA V =0.9V Q FB 0.1 1.0 A ISHDN, Shutdown Supply Current VEN=0V VFB, Feedback Voltage 0.785 0.810 0.835 V VFBOV, Feedback Overvoltage Threshold 0.972 V I , Feedback Bias Current -0.1 +0.1 A V =0.85V FB FB (1) R , Switch On-resistance 0.35 I =1A DSON SW 0.1 10 A ILEAK, Switch Leakage Current VIN=18V, VEN=0V ILIM, Switch Current Limit 1.8 2.4 A V , EN Pin Threshold 1.5 V ENH V , EN Pin Threshold 0.4 V ENL V , Input UVLO Threshold 3.8 4.3 V V Rising UVLO 3.3 IN VHYS, Input UVLO Hysteresis 0.2 V fOSC1, Oscillator frequency 1.1 1.4 1.7 MHz f , Oscillator frequency 460 kHz Short Circuit OSC2 D , Maximum Duty Cycle 90 % V =0.6V MAX FB DMIN, Minimum Duty Cycle 0 % VFB=0.9V (1) tON, Minimum On Time 100 ns (1) TOTSD, Thermal Shutdown 160 C (1) T , Thermal Shutdown Hysteresis 20 C HYS (1) t , Soft-start time 200 s SS Note 1: RDSON, tON, TOTSD, THYS and tSS are guaranteed by design. 2/10 Rev. 1.2.1
