XC9265 Datasheet, PDF (1/29 Pages) Torex Semiconductor – Ultra Low Power Synchronous Step-Down PFM DC/DC Converter

XC9265 Series
ETR05053-002
Ultra Low Power Synchronous Step-Down PFM DC/DC Converter
■GENERAL DESCRIPTION
☆GreenOperation Compatible
XC9265 series are Ultra Low Power synchronous-rectification 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 1.0V to 4.0V(accuracy: ±2.0%) in
increments of 0.1V.
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, XC9265 series has UVLO release voltage of 1.8V (Typ.).
The product with CL discharge function 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.
■APPLICATIONS
● Wearable Devices
● Smart meters
● Bluetooth units
■FEATURES
Input Voltage Range
Output Voltage Setting
Output Current
: 2.0V~6.0V
: 1.0V~4.0V (±2.0%, 0.1V step increments)
: 200mA(XC9265A/C)
50mA(XC9265B/D)
● Energy Harvest devices
● Back up power supply circuits
● Portable game consoles
Driver Transistor
Supply Current
Control Method
: 0.4Ω (Pch Driver Tr)
0.4Ω (Nch Synchronous rectifier Switch Tr)
: 0.50μA @ VOUT(T)=1.8V (TYP.)
: PFM control
● Devices with 1 Lithium cell
High Speed Transient
PFM Switching Current
: 50mV (VIN=3.6V, VOUT=1.8V, IOUT=10μA→50mA)
: 330mA(XC9265A/C), 180mA(XC9265B/D)
Function
: Short Protection
CL Discharge(XC9265C/ D)
UVLO
Ceramic Capacitor Compatible
Operation Ambient Temperature : -40～+85℃
Package
: SOT-25, USP-6EL
Environmentally Friendly : EU RoHS compliant, Pb Free
■TYPICAL APPLICATION CIRCUIT
VIN
CIN
(Ceramic)
L
VIN
LX
CE
VOUT
GND
VOUT
CL
(Ceramic)
■ TYPICAL PERFORMANCE
CHARACTERISTICS
●Efficiency vs. Output Current
XC9265B181xR-G(V_OUT=1.8V)
L=10μH(VLF302512M-100M),CIN=10μF(LMK107BJ106MA),
CL=22μF(JMK107BJ226MA)
100
80
VIN=4.2V
60
VIN=3.6V
VIN=2.7V
40
20
0
0.01
0.1
1
10
Output Current : I_OUT (mA)
100
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