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參數(shù)資料
| 型號： | XC9237C3CDMR |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | 600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters |
| 中文描述： | 600mA的驅(qū)動程序圖。內(nèi)置的同步降壓DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 5/28頁 |
| 文件大?。?/td> | 774K |
| 代理商： | XC9237C3CDMR |
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5/28
XC9235/XC9236/XC9237
Series
XC9237A18Dxx, V
OUT
=1.8V, FOSC=3.0MHz, Ta=25
℃
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP. MAX. UNIT
CIRCUIT
Output Voltage
V
OUT
When connected to external components,
V
IN
=V
CE
=5.0V, I
OUT
=30mA
V
IN
=V
OUT(E)
+2.0V, V
CE
=1.0V,
When connected to external components
(*9)
V
CE
=V
IN
, V
OUT
=0V,
Voltage which Lx pin holding “L” level
(*1,*11)
V
IN
=V
CE
=5.0V, V
OUT
=V
OUT(E)
V
IN
=5.0V, V
CE
=0V, V
OUT
=V
OUT(E)
When connected to external components,
V
IN
=V
OUT(E)
+2.0V, V
CE
=1.0V, I
OUT
=100mA
When connected to external components,
V
IN
=V
OUT(E)
+2.0V, V
CE
=V
IN
, I
OUT
=1mA
V
CE
=V
IN
=(C-1), I
OUT
=1mA
(*12)
V
IN
=V
CE
=5.0V, V
OUT
=V
OUT(E)
V
IN
=V
CE
=5.0V, V
OUT
=V
OUT(E)
When connected to external components,
V
CE
=V
IN
V
OUT(E)
+1.2V, I
OUT
=100mA
V
IN
=V
CE
=5.0V, V
OUT
=0V, I
Lx
=100mA
(*3)
V
IN
=V
CE
=3.6V, V
OUT
=0V, I
Lx
=100mA
(*3)
V
IN
=V
CE
=5.0V
(*4)
V
IN
=V
CE
=3.6V
(*4)
V
IN
=V
OUT
=5.0V, V
CE
=0V, Lx=0V
V
IN
=V
OUT
=5.0V, V
CE
=0V, Lx=5.0V
V
IN
=V
CE
=5.0V, V
OUT
=V
OUT(E)
1.764 1.800 1.836
V
Operating Voltage Range
V
IN
2.0
-
6.0
V
Maximum Output Current
I
OUTMAX
600
-
-
mA
U.V.L.O. Voltage
V
UVLO
1.00
1.40
1.78
V
Supply Current
Stand-by Current
I
DD
I
STB
1.1V
-
-
21
0
35
1.0
A
A
1.1V
Oscillation Frequency
FOSC
2550
3000
3450
kHz
PFM Switching Current
I
PFM
170
220
270
mA
Maximum IPFM Limit
Maximum Duty Cycle
Minimum Duty Cycle
MAXI
PFM
MAXDTY
MINDTY
-
200
-
-
300
-
0
%
%
%
0.9V
0.1V
100
-
Efficiency
EFFI
-
86
-
%
Lx SW "H" ON Resistance 1
Lx SW "H" ON Resistance 2
Lx SW "L" ON Resistance 1
Lx SW "L" ON Resistance 2
Lx SW "H" Leak Current
(*5)
Lx SW "L" Leak Current
(*5)
Current Limit
(*10)
Output Voltage
Temperature Characteristics
R
LxH
R
LxH
R
LxL
R
LxL
I
LeakH
I
LeakL
I
LIM
V
OUT
-
-
-
-
-
-
0.35
0.42
0.45
0.52
0.01
0.01
1050
0.55
0.67
0.66
0.77
1.0
1.0
1350
-
-
A
A
0.9V
(*8)
900
mA
V
OUT
topr
I
OUT
=30mA, -40
V
OUT
=0V, Applied voltage to V
CE
Voltage changes Lx to “H” level
(*11)
V
OUT
=0V, Applied voltage to V
CE
Voltage changes Lx to “L” level
(*11)
When connected to external components,
I
OUT
=1mA
, Voltage which oscillation
frequency becomes 2550kHz
3450kHz
(*13)
When connected to external components,
I
OUT
=1mA
, Voltage which oscillation
frequency becomes FOSC
V
IN
=V
CE
=5.0V, V
OUT
=0V
V
IN
=5.0V, V
CE
=0V, V
OUT
=0V
When connected to external components,
V
CE
=0V
V
IN
, I
OUT
=1mA
V
IN
=V
CE
=5.0V, V
OUT
=0.8
Short Lx at 1
resistance
(*7)
Sweeping V
OUT
, V
IN
=V
CE
=5.0V, Short Lx at
1
resistance, V
OUT
voltage which Lx
becomes “L” level within 1ms
Topr
85
-
100
-
ppm/
CE "H" Voltage
V
CEH
0.65
-
V
IN
V
CE "L" Voltage
V
CEL
V
SS
-
0.25
V
PWM "H" Level Voltage
V
PWMH
FOSC
-
-
V
IN
-
1.0
V
PWM "L" Level Voltage
V
PWML
2550kHz
(*13)
V
IN
–
0.25
-
-
V
CE "H" Current
CE "L" Current
I
CEH
I
CEL
- 0.1
- 0.1
-
-
0.1
0.1
A
A
Soft Start Time
T
SS
0.5
0.9
3.0
ms
Latch Time
T
LAT
V
OUT(E)
,
1.0
-
20
ms
Short Protection
Threshold Voltage
V
SHORT
0.675 0.900 1.150
V
ELECTRICAL CHARACTERISTICS (Continued)
Test conditions: Unless otherwise stated, V
IN
=5.0V, V
OUT(E)
=Setting Voltage
NOTE:
*1: Including hysteresis operating voltage range.
*2: EFFI = { ( output voltage
output current )
*3: ON resistance (
)= (V
IN
- Lx pin measurement voltage)
*4: R&D value
*5: When temperature is high, a current of approximately 10
*6: The CE/MODE pin of the XC9237A series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the
operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than V
IN
minus
0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than V
IN
minus 1.0V and equal to or greater than V
CEH
.
*7: Time until it short-circuits V
OUT
with GND via 1
of resistor from an operational state and is set to Lx=0V from current limit pulse generating.
*8: When V
IN
is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.
*9: 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.
*10: Current limit denotes the level of detection at peak of coil current.
*11: “H”=V
IN
~V
IN
-1.2V, “L”=+0.1V~-0.1V
*12: XC9235 series exclude I
PFM
and MAXI
PFM
because those are only for the PFM control’s functions.
*13: XC9235/9236 series exclude V
PWMH
and V
PWML
because those are only for the XC9237 series’ functions.
( input voltage
input current) }
100mA
100
A (maximum) may leak.
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