MYRGM180150W31RA Murata

PicoBK MYRGM-WMYRGM-B series 1.5A Inductor Built-in Step-Down DC/DC Converters GreenOperationCompatible GENERAL DESCRIPTION The MYRGM-W/MYRGM-B series is a synchronous step-down mini DC/DC converter which integrates an inductor and a control IC in one tiny package (2.5mm3.2mm, h=1.0mm). An internal coil simplifies the circuit and enables minimization of noise and other operational trouble due to the circuit wiring. A wide operating voltage range of 2.7V to 5.5V enables Support for applications that require an internally fixed output voltage (0.8V to 3.6V). The MYRGM-W/MYRGM-B series use synchronous rectification at an operating frequency of 3.0MHz. The MYRGM-W/MYRGM-B series use High Speed Transient Response-COT. PWM control (MYRGM-W) or automatic PWM/PFM switching control (MYRGM-B) can be selected. The series have a high speed soft-start as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.0V or lower. When CE=Low, the integrated CL discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge switch located between the L and V pins. The power consumption will be less than 1.0A. X SS FEATURES APPLICATIONS Input Voltage : 2.7V5.5V Note Book PC Output Voltage : 0.8V3.6V Tablet PC Oscillation Frequency : 3.0MHz SSD Output Current : 1.5A Mobile phone Efficiency : 92% (V =5.0V, V =3.3V/500mA) IN OUT Projector High Speed Transient Response-COT ControlMethods : Printer 100% Duty Cycle PWM (MYRGM-W) PWM/PFM(MYRGM-B) : Thermal Shut Down Current Circuit Protection Limit Circuit (Drop) Short Circuit Protection (Latch) Functions : Soft-start Circuit Built-in UVLO CLDischarge Output Capacitor : Low ESR Ceramic Capacitor Operating Ambient Temperature : -40+105 Environmentally Friendly : EU RoHS Compliant, Pb Free Halogen Free TYPICAL PERFORMANCE TYPICAL APPLICATIONCIRCUIT CHARACTERISTICS MYRGM-W/MYRGM-B (VOUT=3.3V) 100 MYRGM-B 80 60 40 MYRGM-W 20 V =5.0V IN 0 0.1 1 10 100 1000 10000 Output Current : I (mA) OUT MYRGM-W/B series A01 Page 1 of 17 Efficiency : EFFI (%)PicoBK MYRGM-WMYRGM-B series 1.5A Inductor Built-in Step-Down DC/DC Converters BLOCK DIAGRAM * The MYRGM-W offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at PWM internally. The MYRGM-B control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at PWM/PFM automatic switching internally. Diodes inside the circuit are an ESD protection diode and a parasitic diode. MYRGM-W/B series A01 Page 2 of 17