XC9265Series
ETR05053-007
Ultra Low Power Synchronous Step-Down PFM DC/DC Converter
☆GreenOperation Compatible
■GENERAL DESCRIPTION
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 C capacitors are needed as external parts to make a step down DC/DC circuit.
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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 C
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discharge function can discharge C capacitor during stand-by mode due to the internal resistance by turning
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on the internal switch between VOUT -GND. This enables output voltage restored to GND level fast.
■FEATURES
■APPLICATIONS
Input Voltage Range
:
:
:
2.0V~6.0V
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Wearable Devices
Output Voltage Setting
Output Current
1.0V~4.0V (±2.0%, 0.05V increments)
Smart meters
200mA (XC9265A/C)
50mA (XC9265B/D)
Bluetooth units
Driver Transistor
:
0.4Ω (Pch Driver Tr)
Energy Harvest devices
Backup power supply circuits
Portable game consoles
Devices with 1 Lithium cell
0.4Ω (Nch Synchronous rectifier Switch Tr)
0.50μA @ VOUT(T)=1.8V (TYP.)
PFM control
Supply Current
Control Method
:
:
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
-40 ~ 85℃
Operation Ambient Temperature
Package
:
:
:
SOT-25, USP-6EL
Environmentally Friendly
EU RoHS compliant, Pb Free
■ TYPICAL PERFORMANCE
■TYPICALAPPLICATION CIRCUIT
CHARACTERISTICS
●Efficiency vs. Output Current
X C 9 2 6 5 B 1 8 O1 Ux=TR1 -. G8 V( V)
L
= μ1H0( V L F 3 0 2 5 1=210μMF(L-M1K10070BJM106)MA, ),C
IN
CL=22μF(JMK107BJ226MA)
L
VIN
VOUT
100
80
60
40
20
0
VIN
CE
LX
CIN
(Ceramic)
CL
(Ceramic)
VOUT
VIN=4.2V
VIN=3.6V
GND
VIN=2.7V
0.01
0.1
1
10
100
O u t p u t
CO u rT(rme
U
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