SC186ULTRT Semtech

SC186 4A Synchronous Step-Down Regulator POWER MANAGEMENT Features Description Input Voltage Range 2.9 to 5.5V The SC186 is a 4A synchronous step-down regulator designed to operate with an input voltage range of 2.9V Output Voltage Range 0.8V to 3.3V to 5.5V. The device oeff rs fifteen pre-determined output Output Current up to 4A voltages via four control pins programmable from 0.8 to Ultra-Small Footprint <1mm Height Solution 3.3 Volts. The control pins allow for on-the-fly voltage Switching Frequency 1.5MHz changes, enabling system designers to implement Automatic Power Save Mode dynamic power savings. The device is also capable of Efficiency Up to 95% adjusting output voltage via an external resistor divider. Low Output Noise Across Load Range The SC186 is optimized for maximum efficiency over a Excellent Transient Response wide range of load currents. During full load operation, Start Up into Pre-Bias Output the device operates in PWM mode with fixed 1.5MHz Duty-Cycle Low Dropout Operation 100% oscillator frequency, allowing the use of small surface Shutdown Current <1A mount external components. As the load decreases, the Externally Programmable Soft Start Time regulator will transition into Power Save mode maintain- Power Good indicator ing high efficiency. Input Under-Voltage Lockout Connecting the control pins to logic low forces the device Output Over-Voltage, Current Limit Protection into shutdown mode reducing the supply current to less Over-Temperature Protection than 1A. Connecting any of the control pins to logic high Thermally Enhanced 3 x 3 x 0.6 (mm) enables the converter and sets the output voltage accord- ing to Table 1. Other features include under-voltage MLPQ-UT16 package lockout, programmable soft-start to limit in-rush current, Temperature Range -40 to +85C power good indicator, over-temperature protection, and Lead-free, Halogen free, and RoHS/WEEE compliant output short circuit protection. Applications The SC186 is available in a thermally-enhanced, 3 x 3 x 0.6 Routers and Network Cards (mm) MLPQ-UT16 package. LCD TV Office Automation Printers Typical Application Circuit V LX OU T V PVIN IN L 1.0H C IN R C RP GOOD A V IN OU T 22F SC186 100k 1 47F VOU T AVIN C A V IN SS C S S 0.1F 10nF PGOOD C T L0 C T L0 PGN D C T L1 C T L1 AGN D C T L2 C T L2 C T L3 C T L3 Revision 2.1 2016 Semtech Corporation 1SC186 Pin Configuration Ordering Information Device Package (1)(2) SC186ULTRT 3 x 3 x 0.6 (mm) MLPQ-UT16 (5) SC186EVB Evaluation Board 16 15 14 13 Notes: (1) Available in tape and reel only. A reel contains 3,000 devices. P V IN 1 12 P G N D (2) Device is lead-free, Halogen free, and RoHS/WEEE compliant. TO P V IE W A G N D 2 11 P G N D A V IN 3 10 V O U T T C TL0 4 9 S S 5 6 7 8 Table 1 Output Voltage Settings 3 x 3 x 0.6 (mm) MLPQ-UT16 CTL3 CTL2 CTL1 CTL0 Output Voltage = 40C/W = 7C/W JA JC 0 0 0 0 Shutdown 0 0 0 1 0.8 Marking Information 0 0 1 0 1.00 0 0 1 1 1.025 0 1 0 0 1.05 0 1 0 1 1.20 186 0 1 1 0 1.25 0 1 1 1 1.30 yyw w 1 0 0 0 1.50 xxxx 1 0 0 1 1.80 1 0 1 0 2.20 1 0 1 1 2.50 yyww = Date Code 1 1 0 0 2.60 XXXX = Semtech Lot number 1 1 0 1 2.80 1 1 1 0 3.00 1 1 1 1 3.30 2 C T L1 P V IN C T L2 LX C T L3 LX P G O O D P G N D