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XC9224 데이터시트 PDF




Torex Semiconductor에서 제조한 전자 부품 XC9224은 전자 산업 및 응용 분야에서
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부품번호 XC9224 기능
기능 (XC9223 / XC9224) 1A Driver Transistor Built-In Step-Down DC/DC Converters
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XC9224 데이터시트, 핀배열, 회로
XC9223/XC9224 Series
1A Driver Transistor Built-In Step-Down DC/DC Converters
ETR0509_007
www.datasheet4u.com
GENERAL DESCRIPTION
GreenOperation-Compatible
The XC9223/XC9224 series are synchronous step-down DC/DC converters with a 0.21Ω (TYP.) P-channel driver transistor and a
synchronous 0.23Ω (TYP.) N-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 1.0A by
reducing ON resistance of the built-in transistor. With a high switching frequency of 1.0MHz or 2.0MHz, a small inductor is selectable;
therefore, the XC9223/XC9224 series are ideally suited to applications with height limitation such as HDD or space-saving
applications. Current limit value can be chosen either 1.2A (MIN.) when the LIM pin is high level, or 0.6A (MIN.) when the LIM pin is
low level for using the power supply which current limit value differs such as USB or AC adapter. With the MODE/SYNC pin, the
XC9223/XC9224 series provide mode selection of the fixed PWM control or automatically switching current limit PFM/PWM control.
As for preventing unwanted switching noise, the XC9223/XC9224 series can be synchronized with an external clock signal within the
range of ± 25% toward an internal clock signal via the MODE/SYNC pin. For protection against heat damage of the ICs, the
XC9223/XC9224 series build in three protection functions: integral latch protection, thermal shutdown, and short-circuit protection.
With the built-in U.V.L.O. (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage
becomes 1.8V or lower. The XC9223B/XC9224B series’ detector function monitors the discretional voltage by external resistors.
APPLICATIONS
HDD
Notebook computers
CD-R / RW, DVD
PDAs, Portable communication modems
Digital cameras, Video recorders
Various general-purpose power supplies
FEATURES
Input Voltage Range
Output Voltage Range
Oscillation Frequency
Output Current
: 2.5V ~ 6.0V
: 0.9V ~ VIN (set by FB pin)
: 1MHz, 2MHz (+15% accuracy)
: 1.0A
Maximum Current
Limit
: 0.6A (MIN.) ~ 0.9A (MAX)
with LIM pin=’L’
: 1.2A (MIN.) ~ 2.0A (MAX.)
with LIM pin=’H’
Controls
Protection Circuits
: PWM/PFM or PWM by MODE pin
: Thermal shutdown
Integral latch method
Short-circuit protection
Soft-Start Time
Voltage Detector
: 1ms (TYP.) internally set
: B type (with VD function)
Built-in P-channel
MOSFET
D type (without VD function)
: 0.21
Built-in Synchronous : 0.23
N-channel MOSFET
(No Schottky Barrier Diode Required)
High Efficiency
: 95% (VIN=5.0V, VOUT=3.3V)
Synchronized with an External Clock Signal
Ceramic Capacitor Compatible
Packages
: MSOP-10, USP-10B, SOP-8
* SOP-8 package is available for the XC9223D type only.
TYPICAL APPLICATION CIRCUIT
TYPICAL PERFORMANCE
CHARACTERISTICS
Efficiency vs. Output Current
(*1) A capacitor of 2200pF0.1μF is recommended to place at the CDD between the AGND
pin and the VIN pin.
Please refer to the page showing INSTRUCTION ON PATTERN LAYOUT for more detail.
100
L=4.7
XXCC99222233BB008811AAxx
VIN=5V, FOSC=1MHz,
H (CVDINR=H54VD,2F8OC)S, CC=IN1=M1H0z, FL=(c4e.7raumHi(cC),DCRLH=41D028FC)(,ceramic)
CIN=10 uF(ceram i c), CL=1 0uF(cera m i c)
90
80
70
60 VOUT=3.3V
50
40 VOUT=1.5V
30
20 PW M/PFM
10 PW M
0
1 10 100 1000
Output Current: IOUT (mA)
1/25




XC9224 pdf, 반도체, 판매, 대치품
XC9223/XC9224 Series
BLOCK DIAGRAM
XC9223B/XC9224B Series
www.datasheet4u.com
LIM
Error Amp.
FB
Vref with
CE Soft-Start,
CE
Comparator
PWM
Current Limit
PFM
Logic
Buffer
Driver
Current
Feedback
MODE/
SYNC
PMW/PFM
Ramp Wave
Generator,
OSC
VD
Thermal
Shutdown
VDIN
XC9223D Series
LIM
FB
CE
MODE/
SYNC
Error Amp.
Vref with
Soft-Start,
CE
Comparator
PWM
Current Limit
PFM
Logic
Buffer
Driver
Current
Feedback
PMW/PFM
Ramp Wave
Generator,
OSC
Thermal
Shutdown
VIN
LX
PGND
AGND
VDOUT
VIN
LX
PGND
AGND
4/25

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XC9224 전자부품, 판매, 대치품
XC9223/XC9224
Series
ELECTRICAL CHARACTERISTICS (Continued)
XC9223/XC9224 Series (Continued), Voltage Detector Block (*9)
PARAMETER
SYMBOL
CONDITIONS
Detect Voltage
www.datasheet4u.com
Release Voltage
Hysteresis Width
VDF
VDR
VHYS
VDIN Voltage which VDOUT becomes
‘H’ to ‘L’, Pull-up resistor 200kΩ
VDIN Voltage which VDOUT becomes
‘L’ to ‘H’, Pull-up resistor 200kΩ
VHYS=(VDR-VDF) / VDF x 100
Output Current
Delay Time
VDIN ‘H’ Current
IDOUT
TDLY
IVDINH
VDIN=VDF x 0.9, apply 0.25V to VDOUT
Time until VDOUT becomes ‘L’ to ‘H’ after
VDIN changed from 0V to 1.0V
VIN=VDIN=6.0V
VDIN ‘L’ Current
IVDINL
VIN=6.0V, VDIN=0V
VDOUT ‘H’ Current
IVDOUTH
VIN=VDIN=VDOUT=6.0V
VDOUT ‘L’ Current
IVDOUTL
VIN=VDIN=6.0V, VDOUT=0V
MIN.
0.676
0.716
-
2.5
0.5
-
- 0.1
-
- 1.0
TYP.
0.712
0.752
5
4.0
2.0
-
-
-
-
MAX.
0.744
0.784
-
-
8.0
0.1
-
1.0
-
Topr=25
UNIT CIRCUIT
V
V
%-
mA
ms
A
A
A
A
Test Condition: Unless otherwise stated, VIN=3.6V, CE=VIN, MODE/SYNC=VIN
NOTE:
*1: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.
If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.
*2: Refer to the chart below.
*3: EFFI = { ( output voltage x output current ) / ( input voltage x input current) } x 100
*4: On resistance (Ω)= (VIN- Lx pin measurement voltage) / 100mA
*5: Time until it short-circuits Lx with GND through 1Ω of resistance from a state of operation and is set to Lx=Low from current limit pulse
generating.
*6: When temperature is high, a current of approximately 100 A may leak.
*7: Designed value.
*8: Whether the Lx pin is high level or low level is judged at the condition of “H”>VIN-0.1V and “L”<0.05V.
*9: There is no voltage detector function available in the XC9223D series.
Electrical Characteristics Standard Values
No.
D1-1
D1-2
D1-3
D1-4
D1-5
PARAMETER
Supply Current 1
Supply Current 2
Oscillation Frequency
External Clock
Synchronous Oscillation
Integral Latch Time
SYMBOL
IDD1
IDD2
FOSC
SYNCOSC
TLAT
MIN.
-
-
0.85
0.75
-
1MHz
TYP.
380
30
1.00
-
6.0
MAX.
700
60
1.15
1.25
15.0
MIN.
-
-
1.7
1.5
-
2MHz
TYP.
440
45
2.0
-
3.0
MAX.
800
80
2.3
2.5
15.0
No.
D1-6
PARAMETER
Stand-by Current
SYMBOL
ISTB
XC9223 SERIES
MIN.
TYP. MAX.
- 0.1 2.0
XC9224 SERIES
MIN.
TYP.
MAX.
- 7.0 15.0
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