XC9281/XC9282 Series is Not Recommended for New Designs.
XC9281/XC9282
Series
■GENERAL
DESCRIPTION
ETR05063-007
HiSAT-COT
®
Control Extremely Small 600mA Step-Down DC/DC Converters
☆Green
Operation Compatible
The XC9281/XC9282 series are 600mA synchronous rectification DC/DC converters adopting HiSAT-COT
(*)
control. Due to
increasing the oscillation frequency to high frequency, coil with a size of 1.0 x 0.5 mm can be used. A 0.6 x 0.3 mm ceramic
capacitor can be used for the input capacitance (C
IN
) and the output capacitance (C
L
), realizing that the mounting area including
peripheral components can be reduced to 3.52 mm
2
.
Due to increasing the oscillation frequency to a high frequency, the mounting area is reduced. Additionally, an efficiency equal
to or higher than that of conventional products can realize by improving on-resistance and current consumption. Because of
these features, XC9281/XC9282 series are ideal for equipment requiring miniaturization and low profile mounting area, and
battery-powered equipment such as mobile equipment.
Moreover, the high-speed transient response technology of the HiSAT-COT control makes it possible to minimize the
fluctuation of the output voltage for a load transient condition. This feature is optimal for applications requiring a fast response
and output voltage stability for an instantaneous load fluctuation like FPGA.
HiSAT-COT is a proprietary high-speed transient response technology for DC/DC converter which was developed by Torex. It is Ideal for the LSI's that require
high precision and high stability power supply voltage.
(*)
■APPLICATIONS
●
Smart phones / Mobile phones
●
Wireless earphone / Headset
●
Wearable devices
●
DSC / Camcorder
●
Portable game consoles
●
Smartcard
●
Power supply for module
●
Various small power sources
■FEATURES
Input Voltage Range
Output Voltage Range
Output Current
Quiescent Current
Oscillation Frequency
Efficiency (f
OSC
=4MHz)
Control Methods
:
:
:
:
:
:
:
2.5V ~ 5.5V
0.7V ~ 1.15V (±2.0%)
1.2V ~ 3.6V (±1.5%)
600mA
11μA (XC9282 PWM/PFM Auto)
4MHz, 6MHz
90.0% (V
IN
=3.7V,V
OUT
=1.8V,I
OUT
=200mA)
HiSAT-COT Control
PWM Control (XC9281)
PWM/PFM Auto (XC9282)
Protection Functions
Functions
Input / Output Capacitor
Operating Ambient Temperature
Package
Environmentally
:
:
:
:
:
:
Current Limit
Soft-Start, UVLO
C
L
Discharge (Type B)
Ceramic Capacitor
- 40℃ ~ 105℃
LGA-6B01 (1.2 x 1.2 x 0.3mm)
WLP-5-06 (0.88 x 0.96 x 0.33mm)
EU RoHS Compliant, Pb Free
■PCB
IMAGE
■TYPICAL
PERFORMANCE
CHARACTERISTICS
■TYPICAL
APPLICATION CIRCUIT
XC9281B18D / XC9282B18D (V
OUT
=1.8V)
L =
1.0μH (DFE18SAN1R0MG0L)
C
IN
= 4.7μF
(GRM035R60J475ME15) C
L
= 4.7μF
(GRM035R60J475ME15)
V
IN
2.5 ~ 5.5V
XC9281/XC9282
V
IN
CE
(1.0x0.5x0.55mm)
L : 1.0uH
L
X
V
OUT
GND
V
OUT
1.8V / 600mA
C
IN
: 4.7uF
(0.6x0.3x0.5mm)
CE
C
L
: 4.7uF
(0.6x0.3x0.5mm)
1/31
XC9281/XC9282
Series
■BLOCK
DIAGRAM
1) XC9281/XC9282 Series Type A
XC9281/XC9282 Series is
Not Recommended for New Designs.
R1
V
OUT
C
FB
Phase
Compensation
Error Amp.
+
-
Comparator
-
+
S
R
Q
Logic
Current Limit
V
IN
R2
GND
Vref with
Soft Start
Synch.
Buffer
Driver
Lx
On Time
Generator
CE
CE Control Logic,
UVLO
V
IN
V
OUT
PWM/PFM
Selector
(*)
"PWM/PFM Selector" in the XC9281 series is fixed to PWM control.
"PWM/PFM Selector" In the XC9282 series is fixed to PWM/PFM automatic switching control.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
2) XC9281/XC9282 Series Type B
Phase
Compensation
Error Amp.
+
-
R2
GND
Vref with
Soft Start
CE Control Logic,
UVLO
C
L
Auto-Discharge
Comparator
-
+
S
R
Q
Logic
Synch.
Buffer
Driver
Lx
R1
V
OUT
C
FB
Current Limit
V
IN
On Time
Generator
V
IN
V
OUT
PWM/PFM
Selector
CE
(*)
"PWM/PFM
Selector" in the XC9281 series is fixed to PWM control.
"PWM/PFM Selector" In the XC9282 series is fixed to PWM/PFM automatic switching control.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
2/31
XC9281/XC9282 Series is Not Recommended for New Designs.
XC9281/XC9282
Series
■PRODUCT
CLASSIFICATION
1) Ordering Information
XC9281①②③④⑤⑥-⑦ PWM Control
XC9282①②③④⑤⑥-⑦ PWM/PFM Automatic switching control
DESIGNATOR
①
ITEM
Type
SYMBOL
A
B
DESCRIPTION
Refer to Selection Guide
Output voltage options
e.g. 1.2V →
②=1, ③=2
1.25V →
②=1, ③=C
0.05V increments : 0.05=A, 0.15=B, 0.25=C,
0.35=D, 0.45=E, 0.55=F, 0.65=H, 0.75=K, 0.85=L,
0.95=M
4.0MHz
6.0MHz
LGA-6B01 (5,000pcs/Reel)
WLP-5-06 (5,000pcs/Reel)
②③
Output Voltage
07 ~ 36
④
Oscillation Frequency
Packages (Order Unit)
D
E
1R-G
0R-G
⑤⑥-⑦
(*1)
(*1)
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
2) Selection Guide
TYPE
A
B
OUTPUT
VOLTAGE
Fixed
Fixed
SOFT-START
TIME
Fixed
Fixed
CHIP ENABLE
Yes
Yes
CURRENT
LIMIT
Yes
Yes
C
L
AUTO-
DISCHARGE
No
Yes
AUTOMATIC
RECOVERY
(CURRENT LIMIT)
Yes
Yes
UVLO
Yes
Yes
TYPE
A
B
3/31
XC9281/XC9282 Series is Not Recommended for New Designs.
XC9281/XC9282
Series
■ABSOLUTE
MAXIMUM RATINGS
PARAMETER
V
IN
Pin Voltage
Lx Pin Voltage
V
OUT
Pin Voltage
CE Pin Voltage
Power Dissipation
(Ta=25℃)
LGA-6B01
WLP-5-06
Pd
Topr
Tstg
SYMBOL
V
IN
V
Lx
V
OUT
V
CE
RATINGS
-0.3 ~ 6.2
-0.3 ~ V
IN
+ 0.3 or 6.2
(*1)
-0.3 ~ V
IN
+ 0.3 or 4.0
(*2)
-0.3 ~ 6.2
760 (JESD51-7 board)
(*3)
500 (JESD51-7 board)
(*3)
-40 ~ 105
-55 ~ 125
mW
UNITS
V
V
V
V
Operating Ambient Temperature
Storage Temperature
℃
℃
* All voltages are described based on the GND pin.
(*1)
The maximum value should be either V +0.3V or 6.2V in the lowest
.
IN
(*2)
The maximum value should be either V +0.3V or 4.0V in the lowest.
IN
(*3)
The power dissipation figure shown is PCB mounted and is for reference only.
Please refer to PACKAGING INFORMATION for the mounting condition.
5/31
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