Document
XC9281/XC9282 Series
ETR05063-006
HiSAT-COT ® Control Extremely Small 600mA Step-Down DC/DC Converters
■GENERAL DESCRIPTION
☆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 (CIN) and the output capacitance (CL), realizing that the mounting area including peripheral components can be reduced to 3.52 mm2.
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.
■(*) HAiSPATP-CLOITC: TAORTEIXONSのなオン■タイFムEATのURES
● Smart phones / Mobile phones
Input Voltage Range
● Wireless earphone / Headset
Output Voltage Range
● Wearable devices ● DSC / Camcorder ● Portable game consoles ● Smartcard ● Power supply for module
Output Current Quiescent Current Oscillation Frequency Efficiency (fOSC=4MHz) Control Methods
● Various small power sources
■PCB IMAGE
Protection Functions Functions
Input / Output Capacitor Operating Ambient Temperature Package
Environmentally
: 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% (VIN=3.7V,VOUT=1.8V,IOUT=200mA) : HiSAT-COT Control
PWM Control (XC9281) PWM/PFM Auto (XC9282) : Current Limit : Soft-Start, UVLO CL 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
■TYPICAL APPLICATION CIRCUIT
■TYPICAL PERFORMANCE CHARACTERISTICS
XC9281B18D / XC9282B18D (VOUT=1.8V) L = 1.0μH (DFE18SAN1R0MG0L) CIN = 4.7μF (GRM035R60J475ME15) CL = 4.7μF (GRM035R60J475ME15)
VIN 2.5 ~ 5.5V
CIN : 4.7uF
(0.6x0.3x0.5mm)
XC9281/XC9282
L : 1.0uH
(1.0x0.5x0.55mm)
VIN
LX
VOUT 1.8V / 600mA
CE
CE
VOUT
GND
CL : 4.7uF
(0.6x0.3x0.5mm)
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XC9281/XC9282 Series
■BLOCK DIAGRAM
1) XC9281/XC9282 Series Type A
CFB R1
Phase Compensation
Current Limit
VIN
Error Amp.
VOUT
Comparator +
-
Synch.
-
SQ
Logic
Buffer
Lx
+
R2
R
Driver
GND CE
Vref with Soft Start
CE Control Logic, UVLO
On Time Generator
VIN VOUT
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
CFB R1
Phase Compensation
Current Limit
VIN
Error Amp.
VOUT
Comparator +
-
Synch.
-
SQ
Logic
Buffer
Lx
+
R2
R
Driver
GND CE
Vref with Soft Start
CE Control Logic, UVLO
CL Auto-Discharge
On Time Generator
VIN VOUT
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.
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■PRODUCT CLASSIFICATION
XC9281/XC9282
Series
1) Ordering Information XC9281①②③④⑤⑥-⑦ PWM Control XC9282①②③④⑤⑥-⑦ PWM/PFM Automatic switching control
DESIGNATOR
ITEM
SYMBOL
DESCRIPTION
① ②③
④ ⑤⑥-⑦(*1)
Type Output Voltage Oscillation Frequency Packages (Order Unit)
A B
07 ~ 36
D E 1R-G 0R-G
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)
(*1) The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
2) Selection Guide
TYPE
OUTPUT VOLTAGE
A
Fixed
B
Fixed
CHIP ENABLE
Yes Yes
CL AUTODISCHARGE
No Yes
TYPE
A B
SOFT-START TIME
Fixed Fixed
CURRENT LIMIT
Yes Yes
AUTOMATIC RECOVERY (CURRENT LIMIT)
Yes Yes
UVLO
Yes Yes
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XC9281/XC9282 Series
■PIN CONFIGURATION
GND 6 LX 5 VIN 4
1 VOUT 2 N.