|
|
PDF XC9265 Data sheet ( Hoja de datos )
| Número de pieza | XC9265 | |
| Descripción | Ultra Low Power Synchronous Step-Down PFM DC/DC Converter | |
| Fabricantes | Torex Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de XC9265 (archivo pdf) en la parte inferior de esta página. Total 29 Páginas | ||
|
No Preview Available !
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
■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
: 0.4Ω (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)
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
1 page  
XC9265
Series
■ELECTRICAL CHARACTERISTICS (Continued)
●XC9265Bxx1 Type, without CL discharge function
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
Ta=25˚C
UNITS CIRCUIT
Input Voltage
VIN -
2.0 - 6.0 V
①
Output Voltage
UVLO Release Voltage
UVLO Hysteresis Voltage
Supply Current
V (*2)
OUT(E)
VUVLO(E)
VHYS(E)
Iq
Resistor connected with LX pin.
Voltage which LX pin changes “L” to “H” level
while VOUT is decreasing.
VCE=VIN, VOUT=0V. Resistor connected with LX pin.
Voltage which LX pin changes “L” to “H” level
while VIN is increasing.
VCE=VIN, VOUT=0V. Resistor connected with LX pin.
VUVLO(E) - Voltage which LX pin changes “H” to “L”
level while VIN is decreasing.
VIN=VCE=VOUT(T)+0.5V (*1),
VIN=2.0V, if VOUT(T)≦1.5V (*1),
VOUT=VOUT(T)+0.5V (*1), LX=Open.
1.65
0.11
E1
1.8
0.15
E2
1.95
0.24
V
V
V
μA
②
②
②
③
Standby Current
ISTB VIN=5.0V, VCE=VOUT=0V, LX=Open.
- 0.1 1.0 μA
③
LX SW “H” Leak Current
ILEAKH
VIN=5.0V, VCE=VOUT=0V, VLX=0V.
- 0.1 1.0 μA
③
LX SW “L” Leak Current
ILEAKL
VIN=5.0V, VCE=VOUT=0V, VLX=5.0V.
- 0.1 1.0 μA
③
PFM Switching Current
IPFM
VIN=VCE=VOUT(T)+2.0V (*1), IOUT=10mA.
115 180 250 mA
①
Maximum Duty Ratio (*3)
Efficiency (*4)
Efficiency (*4)
Efficiency (*4)
LX SW “Pch”
ON Resistance (*5)
MAXDTY
EFFI
EFFI
EFFI
RLXP
VIN=VOUT=VOUT(Ｔ)×0.95V(*1), VCE=1.2V
Resistor connected with LX pin.
VIN=VCE=5.0V,
VOUT(T)=4.0V (*1), IOUT=30mA.
VIN=VCE=3.6V,
VOUT(T)=3.3V (*1), IOUT=30mA.
VIN=VCE=3.6V,
VOUT(T)=1.8V (*1), IOUT=30mA.
VIN=VCE=5.0V, VOUT=0V, ILX=100mA.
100 -
-%
- 95 - %
- 95 - %
- 89 - %
-
0.4 0.65
Ω
②
①
①
①
④
LX SW “Nch”
ON Resistance
RLXN
VIN=VCE=5.0V.
- 0.4 (*6) -
Ω
-
Output Voltage
Temperature
Characteristics
ΔVOUT/
(VOUT・ΔTopr)
-40℃≦Topr≦85℃.
- ±100 - ppm/℃ ②
CE “High” Voltage
CE “Low” Voltage
CE “High” Current
VCEH
VCEL
ICEH
VOUT=0V. Resistor connected with LX pin.
Voltage which LX pin changes “L” to “H” level while
VCE=0.2→1.5V.
VOUT=0V. Resistor connected with LX pin.
Voltage which LX pin changes “H” to “L” level while
VCE=1.5→0.2V.
VIN=VCE=5.0V, VOUT=0V, LX=Open.
1.2
GND
-0.1
-
-
-
6.0 V
0.3 V
0.1 μA
⑤
⑤
⑤
CE “Low” Current
Short Protection
Threshold Voltage
ICEL VIN=5.0V, VCE=VOUT=0V, LX=Open.
-0.1 - 0.1 μA
Resistor connected with LX pin.
VSHORT
Voltage which LX pin changes “H” to “L” level while
0.4
0.5
0.6
V
VOUT= VOUT(T)+0.1V→0V(*1).
⑤
②
Unless otherwise stated, VIN=VCE=5.0V
(*1) VOUT(T)=Nominal Output Voltage
(*2) VOUT(E)=Effective Output Voltage
The actual output voltage value VOUT(E) is the PFM comparator threshold voltage in the IC.
Therefore, the DC/DC circuit output voltage, including the peripheral components, is boosted by the ripple voltage average value.
Please refer to the characteristic example.
(*3) Not applicable to the products with VOUT(T) < 2.2V since it is out of operational volatge range.
(*4) EFFI=[{ (Output Voltage)×(Output Current)] / [(Input Voltage)×(Input Current)}]×100
(*5) LX SW “Pch” ON resistance = (VIN – VLX pin measurement voltage) / 100mA
(*6) Designed value
5/29
5 Page 
XC9265
Series
■ OPERATIONAL EXPLANATION
The XC9265 series consists of a reference voltage supply, PFM comparator, Pch driver Tr, Nch synchronous rectification switch Tr, current
sensing circuit, PFM control circuit, CE control circuit, and others. (Refer to the block diagram below.)
An ultra-low quiescent current circuit and synchronous rectification enable a significant reduction of dissipation in the IC, and the IC operates with
high efficiency at both light loads and heavy loads. Current limit PFM is used for the control method, and even when switching current
superposition occurs, increases of output voltage ripple are suppressed, allowing use over a wide voltage and current range. The IC is compatible
with low-capacitance ceramic capacitors, and a small, high-performance step-down DC-DC converter can be created.
The actual output voltage VOUT(E) in the electrical characteristics is the threshold voltage of the PFM comparator in the block diagram. Therefore
the average output voltage of the step-down circuit, including peripheral components, depends on the ripple voltage. Before use, test fully using
the actual device.
VIN=VCE=3.6V、VOUT=1.8V、IOUT=5mA、L=10μH、CL=22uF、Ta=25℃
VLX
VOU T( E)
Voltage
VOUT
ILX
IPFM
VIN=VCE=3.6V、VOUT=1.8V、IOUT=30mA、L=10μH、CL=22uF、Ta=25℃
VLX
VOUT
ILX
VLX : 2[V/div]
VOUT : 50[mV/div]
ILX : 100[mA/div]
10[μs/div ]
10[μs/div ]
<Reference voltage supply (VREF)>
Reference voltage for stabilization of the output voltage of the IC.
<PFM control>
(1) The feedback voltage (FB voltage) is the voltage that results from dividing the output voltage with the IC internal dividing resistors RFB1 and
RFB2. The PFM comparator compares this FB voltage to VREF. When the FB voltage is lower than VREF, the PFM comparator sends a signal to the
buffer driver through the PFM control circuit to turn on the Pch driver Tr. When the FB voltage is higher than VREF, the PFM comparator sends a
signal to prevent the Pch driver Tr from turning on.
(2) When the Pch driver Tr is on, the current sense circuit monitors the current that flows through the Pch driver Tr connected to the Lx pin. When the
current reaches the set PFM switching current (IPFM), the current sense circuit sends a signal to the buffer driver through the PFM control circuit. This
signal turns off the Pch driver Tr and turns on the Nch synchronous rectification switch Tr.
(3) The on time (off time) of the Nch synchronous rectification switch Tr is dynamically optimized inside the IC. After the off time elapses and the
PFM comparator detects that the VOUT voltage is higher than the set voltage, the PFM comparator sends a signal to the PFM control circuit that
prevents the Pch driver Tr from turning on. However, if the VOUT voltage is lower than the set voltage, the PFM comparator starts Pch driver Tr on.
11/29
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet XC9265.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| XC9260 | (XC9260 / XC9261) 1.5A Synchronous Step-Down DC/DC Converters |  Torex |
| XC9261 | (XC9260 / XC9261) 1.5A Synchronous Step-Down DC/DC Converters | Torex |
| XC9263 | 18V Operation 0.5A Synchronous Step-Down DC/DC Converters | Torex Semiconductor |
| XC9264 | 18V Operation 0.5A Synchronous Step-Down DC/DC Converters | Torex Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |