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Torex Semiconductor

XC9265 Datasheet Preview

XC9265 Datasheet

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

No Preview Available !

XC9265 Series
ETR05053-006
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.
(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 0.05V.
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, 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%, 0.05V 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
: 0.4Ω (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)
VIN LX
CE VOUT
GND
L
VOUT
CL
(Ceramic)
TYPICAL PERFORMANCE
CHARACTERISTICS
Efficiency vs. Output Current
XC9265B181xR-G(VOUT=1.8V)
100
L=10μH(VLF302512M-100M),CIN=10μF(LMK107BJ106MA),
CL=22μF(JMK107BJ226MA)
80
VIN=4.2V
60
VIN=3.6V
VIN=2.7V
40
20
0
0.01
0.1 1 10
Output Current : IOUT (mA)
100
1/31




Torex Semiconductor

XC9265 Datasheet Preview

XC9265 Datasheet

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

No Preview Available !

XC9265 Series
BLOCK DIAGRAM
XC9265A / XC9265B Type
VOUT
CE
VIN
PFM Comparator Unit
CFB RFB1
RFB2
PFM
Comparator
FB -
+
CE Controller Logic
VDD
UVLO
VIN start up
Controller
VREF
Short
protection
PFM
Controller
Current
Sense
Synch
Buffer
Driver
* Diodes inside the circuit are an ESD protection diode and a parasitic diode.
LX
GND
XC9265C / XC9265D Type
VOUT
CE
VIN
PFM Comparator Unit
CFB RFB1
CL
Discharge
RFB2
PFM
Comparator
FB -
+
CE Controller Logic
VDD
UVLO
VIN start up
Controller
VREF
Short
protection
PFM
Controller
Current
Sense
Synch
Buffer
Driver
* Diodes inside the circuit are an ESD protection diode and a parasitic diode.
LX
GND
2/31


Part Number XC9265
Description Ultra Low Power Synchronous Step-Down PFM DC/DC Converter
Maker Torex Semiconductor
Total Page 30 Pages
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