SY8032IABC

Application Note: SY8032I High Efficiency, 1.5MHz, 2A Synchronous Step Down Regulator ` Features        The low output voltage ripple, the small external inductor and the capacitor sizes are achieved at 1.5MHz switching frequency. dF Ordering Information 2.7V to 5.5V Input Voltage Range 50μA Low Quiescent Current Low RDS(ON) for Internal Switches (Top/Bottom) 130mΩ /85mΩ High Switching Frequency 1.5MHz Minimizes the External Components Internal Soft-start Limits the Inrush Current 100% Dropout Operation Reliable Short Circuit Protection Power Good Indicator RoHS Compliant and Halogen Free Compact Package: SOT23-6 谷    The SY8032I is a high efficiency, 1.5MHz synchronous step down DC/DC regulator capable of delivering up to 2A output current. It can operate over a wide input voltage range from 2.7V to 5.5V and integrate main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. or 午 General Description SY8032 □(□□)□ Temperature Code Package Code Optional Spec Code rep are Package type SOT23-6     Note -- LX IN RPG 100k .C RH 100k PG FB EN RL 49.9k erg Figure1. Schematic Diagram 4.7 Sil 1.2/ 1.8 /3.3 L [µH] 0.47 1.0 2.2 COUT [µF] 10 22 √ ☆ 2×22 √ √ √ √ √ √ Note: ‘☆’ means recommended for most applications. AN_SY8032I Rev. 0.9 © 2018 Silergy Corp. 95 90 85 80 VIN=3.3V, VOUT=1.8V VIN=4.2V, VOUT=1.8V VIN=5.0V, VOUT=1.8V 75 Inductor and COUT Selection Table VOUT [V] 100 COUT 10μF/10V yC GND CFF 22pF orp CIN 10μF/6.3V Efficiency vs. Output Current VOUT:1.8V Efficiency (%) L:1.0µH on fi Typical Applications VIN: 2.7-5.5V Set Top Box USB Dongle Media Player Smart Phone de nti a lP Ordering Number SY8032IABC Applications 70 0.001 0.01 0.1 1 10 Output Current (A) Figure2. Efficiency vs. Output Current Silergy Corp. Confidential- Prepared for Customer Use Only 1 All Rights Reserved. AN_SY8032I Pinout (Top View) EN 1 6 FB GND 2 5 PG 3 4 IN LX (SOT23-6) Pin Name Pin Number EN 1 Enable control. Pull high to turn on. Do not leave it floating. GND 2 Ground pin. LX 3 Inductor pin. Connect this pin to the switching node of the inductor. IN 4 Input pin. Decouple this pin to the GND pin with at least a 10µF ceramic capacitor. PG 5 FB 6 rep are dF or 午 Pin Description 谷 Top Mark: fMxyz (device code: fM, x=year code, y=week code, z= lot number code) lP Power good indicator (open-drain output). Low if the output < 90% of the regulation voltage; High otherwise. Connect a pull-up resistor to the input. Output feedback pin. Connect this pin to the center point of the output resistor divider (as shown in Figure 1) to program the output voltage: V OUT=0.6×(1+RH/RL). on fi Input UVLO IN Current Sense orp .C Internal Power de nti a Block Diagram EN LX yC 1.2V Control Logic 0.6V GND Sil erg FB Soft Start Thermal Detect PG Figure3. Block Diagram AN_SY8032I Rev. 0.9 © 2018 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 2 All Rights Reserved. AN_SY8032I Absolute Maximum Ratings (Note 1) Supply Input Voltage ---------------------------------------------------------------------------------------------- -0.3V to 6.0V PG, FB, EN Voltage------------------------------------------------------------------------------------------- -0.3V to VIN+0.6V LX Voltage------------------------------------------------------------------------------------------------------- -0.3V(*1) to 6.0V(*2) Power Dissipation, P D @ T A = 25°C -------------------------------------------------------------------------------0.83W Package Thermal Resistance (Note 2) θ θ JA -------------------------------------------------------------------------------------------- ----------120°C/W dF Recommended Operating Conditions (Note 3) or 午 谷 JC ----------------------------------------------------------------------------------------------- --------------20° C/W Junction Temperature Range ------------------------------------------------------------------------------------- -40oC to 150°C Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------------ 260°C Storage Temperature Range -------------------------------------------------------------------------------------- -65°C to 150°C (*1) LX Voltage Tested Down to -3V