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XC9265 fiches techniques PDF

Torex Semiconductor - Ultra Low Power Synchronous Step-Down PFM DC/DC Converter

Numéro de référence XC9265
Description Ultra Low Power Synchronous Step-Down PFM DC/DC Converter
Fabricant Torex Semiconductor 
Logo Torex Semiconductor 





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XC9265 fiche technique
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 0.4
(TYP.) Pch driver and 0.4(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
FEATURES
Wearable Devices
Smart meters
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)
Bluetooth units
50mA(XC9265B/D)
Energy Harvest devices
Back up power supply circuits
Portable game consoles
Driver Transistor
Supply Current
Control Method
: 0.4(Pch Driver Tr)
0.4(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=10μA50mA)
: 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)
VIN LX
CE VOUT
GND
L
VOUT
CL
(Ceramic)
TYPICAL PERFORMANCE
CHARACTERISTICS
Efficiency vs. Output Current
XC9265B181xR-G(VOUT=1.8V)
L=10μH(VLF302512M-100M),CIN=10μF(LMK107BJ106MA),
CL=22μF(JMK107BJ226MA)
100
80
VIN=4.2V
60 VIN=3.6V
40 VIN=2.7V
20
0
0.01
0.1 1 10
Output Current : IOUT (mA)
100
1/29

PagesPages 29
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