SDCGS5581 1Amp 6V 1.5MHz Synchronous DC/DC Buck Converter Elektronische Bauelemente RoHS Compliant Product A suffix of “-C” specifies halogen and lead-free DESCRIPTION DFN2*2 The SDCGS5581 are high-efficiency, high frequency Synchrono us step-down DC-DC regulator ICs capable of delivering up to 1A output currents. The SDCGS5581 can operate over a wide input voltage range from 2.6V to 6V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. The output voltage can be regulated as low as 0.6V. The SDCGS5581 can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. This device offers two operation modes, PWM mode and PFM Mode switching control, which allows a high efficiency over the wider range of the load. FEATURES High Efficiency: Up to 96% 1.5MHz Constant Frequency Operation 1000mA Output Current No Schottky Diode Required 2.6V to 6V Input Voltage Range Adjustable Output Voltage Range Options from 0.6V to VIN 100% Duty Cycle Low Dropout Operation Low Quiescent Current: 35µA Slope Compensated Current Mode Control for Excellent Line and Load Transient Response Short Circuit Protection Thermal Fault Protection Inrush Current Limit and Soft Start <1µA Shutdown Current RoHS Compliant, 100%Pb & Halogen Free REF. A B C D E Millimeter Min. Max. 1.95 2.05 1.95 2.05 0.18 0.25 0.65 BSC. 0.70 0.80 REF. F G H I Millimeter Min. Max. 0.01 0.05 0.25 0.35 1.00 1.45 0.50 0.85 MARKING FAA = Date Code PIN DESCRIPTION Pin No. Name 1 NC No Intemal Connection 2 EN Chip Enable 3 VIN Power Input 4 LX Pin for Switching 5、7 GND 6 FB http://www.SeCoSGmbH.com/ 03-Jul-2014 Rev. A Description Ground Feedback Any changes of specification will not be informed individually. Page 1 of 5 SDCGS5581 1Amp 6V 1.5MHz Synchronous DC/DC Buck Converter Elektronische Bauelemente BLOCK DIAGRAM TYPICAL APPLICATIONS ABSOLUTE MAXIMUM RATINGS1 ( TA=25 °C, unless otherwise specified) Parameter Symbol Value Unit VIN -0.3~6.5 V -0.3~6.5 V VSW -0.3 to (VIN+0.3) V IPK 2.5 A Thermal Resistance Junction to Ambient RθJA 130 °C / W Storage Temperature Range TSTG -65 ~ 150 °C TLEAD 300 °C TJ 125 °C TA -40 ~ 85 °C Current sense and voltage feedback inputs RUN, FB Voltages SW Voltage Peak SW Sink and Source Current Lead Temperature (Soldering 10sec) Operating Junction Temperature Operating ambient Temperature 2 Note： 1. Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. 2. TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: TJ= TA+(PD)*( θJA). http://www.SeCoSGmbH.com/ 03-Jul-2014 Rev. A Any changes of specification will not be informed individually. Page 2 of 5 SDCGS5581 1Amp 6V 1.5MHz Synchronous DC/DC Buck Converter Elektronische Bauelemente ELECTRICAL CHARACTERISTICS1 (VIN=VEN=3.6V, VOUT=1.8V, TA=25°C, unless otherwise noted.) Characteristics Input Voltage Range UVLO Threshold Symbol Test Conditions VIN Min Typ Max Unit 2.6 - 6 V VUVLO VIN Rising - 2.4 - V IQ ILOAD=0mA - 35 70 µA VRUN=0V, VIN=4.2V - 0.1 1 µA TA=25°C 0.588 0.6 0.612 0°C ≦TA≦85°C 0.586 0.6 0.613 -40°C ≦TA≦85°C 0.585 0.6 0.615 0.3 1 1.5 V ±0.01 ±1 µA - ±0.01 ±1 µA - 0.13 0.2 - 0.1 0.2 VIN=3V, VOUT= 90% - 2 - A △VFB VIN=2.6V to 6V - 0.04 0.4 %/V Output Voltage Line Regulation REGLINE VIN=2.6V to 6V - 0.04 0.4 % Output Voltage Load Regulation REGLOAD - 0.5 - % - 1.5 - MHz - 300 - KHz Input DC Supply Current Shutdown Mode 2 Regulated Feedback Voltage ISHDN VFB VEN Threshold VEN IEN Leakage Current IEN SW Leakage Current ISW On Resistance of PMOS On Resistance of NMOS Peak Current Limit Reference Voltage Line Regulation Oscillation Frequency Note： 1. 2. RDS(ON)H VEN=0, VIN=VSW=5V FOSC Ω ISW=100mA RDS(ON)L IPK V VOUT=100%, VOUT=0V 100% Production Test at +25°C. Specifications ov er the temperature range are guaranteed by design and characterization. Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. http://www.SeCoSGmbH.com/ 03-Jul-2014 Rev. A Any changes of specification will not be informed individually. Page 3 of 5 SDCGS5581 Elektronische Bauelemente 1Amp 6V 1.5MHz Synchronous DC/DC Buck Converter RATINGS AND CHARACTERISTIC CURVES http://www.SeCoSGmbH.com/ 03-Jul-2014 Rev. A Any changes of specification will not be informed individually. Page 4 of 5 SDCGS5581 Elektronische Bauelemente 1Amp 6V 1.5MHz Synchronous DC/DC Buck Converter RATINGS AND CHARACTERISTIC CURVES http://www.SeCoSGmbH.com/ 03-Jul-2014 Rev. A Any changes of specification will not be informed individually. Page 5 of 5