1.5A COT Control, Synchronous Step-Down DC/DC Converters
The XC9261 series is a group of synchronous-rectification type DC/DC converters with a built-in P-channel MOS driver transistor and N-channel MOS switching transistor, designed to allow the use of ceramic capacitors.
Output voltage is internally set in a range from 0.8V to 3.6V (2.0%) increments of 0.05V. The device provides a high efficiency, stable power supply with an output current of 1.5A to be configured using only a coil and two capacitors cnnected externally. Oscillation frequency is set to 1.2MHz or 3MHz can be selected for suiting to your particular application.
During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0μA or less. As for the soft-start function as fast as 0.30ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF when input voltage becomes 2.0V or lower. The B types integrate CL High Speed discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge.
Two types of package SOT-89-5, USP-6C are available.
(*) HiSAT-COT is an original Torex term for High Speed Transient Response.
|Jul 9, 2014||
|【New Product Leaflet】XC9260/XC9261|
|Aug 28, 2013||
|1.5A Synchronous Step-Down DC/DC Converters with High Speed Transient Response HiSAT-COT Control XC9260/XC9261 Series|
Typical Application Circuit
|Input Voltage Range||2.7V～5.5V|
|Output Voltage Range||0.8V～3.6V(±2.0%)|
100% Duty Cycle
|Protection Circuits||Thermal Shut Down
Current Limit Circuit (Pendent character)
Short Circuit Protection(TypeB)
CL High Speed Auto Discharge(TypeB)
|Capacitor||Low ESR Ceramic|
|Operating Ambient Temperature||-40℃～+105℃|
|Environmentally Friendly||EU RoHS Compliant, Pb Free|
|Package||SOT-89-5||Number of Pins||5|
|Pcs/Reel||1,000||Package Size(mm)||4.5 x 4.6 x 1.5|
|Package||USP-6C||Number of Pins||6|
|Pcs/Reel||3,000||Package Size(mm)||1.8 x 2.0 x 0.6|
How does the GO function of DC/DC converters work? Does it work just like a regulator?
Torex regard the PWM/PFM automatic switch control function as Green Operation (GO) in the case of DC/DC. The GO function is defined as the switching operation between the PFM mode for a small output current and the PWM mode for a large output current. The PFM control method controls the output current by increasing and decreasing the fall time according to the output current while keeping a pulse width. The PWM control method controls the output current by adjusting the pulse width of the rise time, which keeps the rise/fall time interval constant and increases the efficiency at a heavy load. By switching between the PFM control for a small output current and the PWM control for a large output current, the quiescent current can be controlled for both of heavy and light loads.
What is the soft-start function?
The function to soften the rise to prevent the inrush current.