Ultra Low Quiescent Current Synchronous Step-Down PFM DC/DC Converter for Low Output Voltage
XC9272 series are Ultra Low Quiescent Current synchronous-rectification for Low Output Voltage type PFM step down
DC/DC converters with a built-in 0.4Ω (TYP.) Pch driver and 0.4Ω (TYP.) Nch synchronous switching transistor, designed to
allow the use of ceramic capacitor.
PFM control enables a low quiescent current, making these products ideal for battery operated devices that require high
efficiency and long battery life.
Only inductor, CIN and CL capacitors are needed as external parts to make a step down DC/DC circuit.
Operation voltage range is from 2.0V to 6.0V. This product has fixed output voltage from 0.6V to 0.95V(accuracy: ±20mV) in
increments of 0.05V.
During stand-by, all circuits are shutdown to reduce consumption to as low as 0.1μA(TYP.) or less.
With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF when
input voltage gets lower than UVLO detection voltage. Besides, XC9272 series has UVLO release voltage of 1.8V (Typ.).
The product with CL discharge function, XC9272B type, can discharge CL capacitor during stand-by mode due to the internal
resistance by turning on the internal switch between VOUT -GND. This enables output voltage restored to GND level fast.
● Electric devices with GPS
● Wearable devices
● Energy Harvest devices
● Backup power supply circuits
● Devices with 1 Lithium cell
Input Voltage Range
Output Voltage Setting
: 0.6V~0.95V (±20mV, 0.05V step increments)
: 0.4Ω (Pch Driver Tr)
0.4Ω (Nch Synchronous rectifier Switch Tr)
: 0.50μA @ VOUT(T)=0.7V (TYP.)
: PFM control
High Speed Transient
PFM Switching Current
: 50mV (VIN=3.6V, VOUT=0.7V, IOUT=10μA→50mA)
: Short Protection function
CL Discharge(XC9272B type)
Ceramic Capacitor Compatible
Operation Ambient Temperature : -40～+85℃
: SOT-25, USP-6EL
Environmentally Friendly : EU RoHS compliant, Pb Free
■TYPICAL APPLICATION CIRCUIT
●Efficiency vs. Output Current
L= 10μ H( VLF302512M - 100M ) ,CIN = 10μ F( LM K107 BJ10 6M A) ,
0.1 1 10
Output Current : IOUT (mA)