XC9236A33DMR Torex Semiconductor Ltd, XC9236A33DMR Datasheet - Page 10

• Manufacturer Part Number: XC9236A33DMR
• Description: IC, DCDC SYNCH BUCK 3MHZ 3.3V SOT25
• Manufacturer: Torex Semiconductor Ltd

Specifications of XC9236A33DMR

• Primary Input Voltage: 6V
• No. Of Outputs: 1
• Output Voltage: 3.3V
• Output Current: 600mA
• Voltage Regulator Case Style: SOT-25
• No. Of Pins: 5
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

■ELECTRICAL CHARACTERISTICS (Continued)
●XC9237D(F)08Dxx, FB, f
10/33
Temperature Characteristics
Test conditions: V
V
NOTE:
Short Protection Threshold
Lx SW "H" ON Resistance 1
Lx SW "H" ON Resistance 2
Lx SW "H" Leak Current
Soft Start Time (D series)
Lx SW "L" ON Resistance 1
Lx SW "L" ON Resistance 2
Soft Start Time (F series)
OUT
XC9235/XC9236/XC9237
Operating Voltage Range
Maximum Output Current
PFM Switching Current
PWM "H" Level Voltage
Oscillation Frequency
PWM "L" Level Voltage
Maximum Duty Cycle
*10: Current limit denotes the level of detection at peak of coil current.
*11: “H”=V
*12: XC9235 series exclude I
*13: XC9235/9236 series exclude V
Minimum Duty Cycle
*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,
*3: ON resistance (Ω)= (V
*4: R&D value
*5: When temperature is high, a current of approximately 10μA (maximum) may leak.
*1: Including hysteresis operating voltage range.
*2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100
→V
*7: Time until it short-circuits V
*8: When V
*9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.
Stand-by Current
Current Limit
PFM Duty Limit
Supply Current
Output Voltage
CE "H" Voltage
CE "H" Current
CE "L" Voltage
CE "L" Current
UVLO Voltage
PARAMETER
CL Discharge
IN
Efficiency
control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than V
mode when the CE/MODE pin voltage is equal to or lower than V
If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.
FB Voltage
Latch Time
→V
Voltage
CE
IN
~V
IN
OUT
is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.
IN
(*2)
=1.2V when the external components are connected. Unless otherwise stated, V
-1.2V, “L”=+0.1V~-0.1V
(*10)
(*5)
OSC
IN
- Lx pin measurement voltage) / 100mA
PFM
=3.0MHz, Ta=25℃
(V
DTY
FB
SYMBOL
OUT
and DTY
DTY
with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating.
DTY
ILeakH
I
△V
V
V
V
R
OUTMAX
V
EFFI
R
R
R
R
V
V
f
・△Topr)
V
I
I
I
I
SHORT
I
PWMH
t
PWMH
V
I
LIMIT_PFM
PWML
UVLO
OSC
PFM
CEH
t
DCHG
STB
CEL
LIM
LAT
DD
L ｘ H
L ｘ H
L ｘ L
L ｘ L
CEH
CEL
SS
FB
IN
OUT
MAX
MIN
/
and V
LIMIT_PFM
PWML
decreasing FB pin voltage from 0.9V.
When connected to external components,
becomes 2550kHz≦f
When connected to external components,
becomes f
Short Lx at 1Ω resistance
decreasing FB pin voltage from 0.4V.
V
V
When connected to external components
V
Voltage which Lx pin holding “L” level
V
V
When connected to external components,
V
When connected to external components,
V
V
V
V
When connected to external components,
V
V
V
V
V
V
V
I
-40℃≦Topr≦85℃
V
Voltage changes Lx to “H” level
V
Voltage changes Lx to “L” level
I
I
V
V
When connected to external components,
V
V
V
V
OUT
OUT
OUT
because those are only for the PFM control’s functions.
IN
IN
CE
IN
IN
IN
IN
CE
IN
IN
CE
IN
IN
IN
IN
IN
IN
FB
FB
IN
IN
CE
IN
IN
IN
because those are only for the XC9237 series’ functions.
=3.2V, V
= V
=V
=5.0V, V
= 3.2V, V
=3.2V, V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
=5.0V, V
= V
= V
= 5.0V ,L
= V
=0.72V , V
=0.72V, V
= V
= 0V → V
=30mA
= 1mA
= 1mA
CE
IN
CE
CE
CE
CE
CE
CE
CE
CE
FB
CE
CE
CE
IN
IN
=5.0V, V
=2.2V I
= 5.0V, V
, V
Series
OSC
= 5.0V, V
= 5.0V, V
=5.0V, The V
=5.0V, V
=5.0V, V
= 5.0V, V
= 3.6V, V
= 5.0V
= 3.6V
=5.0V, V
=5.0V, The V
＝ 2.4V, I
(*6)
(*6)
CE
FB
CE
CE
CE
＜2550kHz
CE
X
=1.0V
, Voltage which oscillation frequency
, Voltage which oscillation frequency
CE
= 0.4V ,
=0V, V
= 5.0V ,V
CE,
=1.0V, I
= V
= 0V, V
IN
,
CONDITIONS
OUT
(*4)
(*4)
FB
, I
IN
FB
IN
FB
FB
FB
FB
= 0.88V
CE
FB
FB
OUT
minus 1.0V and equal to or greater than V
=1mA
OUT
, I
= 0.64,
= 0.72V
= 0.88V
= 0.72V
OSC
=0.72V
FB
= 0.72V,IL
= 0.72V,IL
= 0V, L
=1mA
OUT
FB
OUT
= 0.88V
FB
FB
= 100mA
≦3450kHz
CE
(*13)
=0.72V
(*7)
at Lx=”High"
=1mA
at Lx=”Low"
=100mA
(*12)
= 0V ,V
X
(*8)
= 0V
X
X
(*12)
(*11)
(*11)
= 100mA
= 100mA
FB
(*13)
= open
(*11)
(*1, *11)
(*11)
while
(*9)
(*3)
(*3)
while
IN
=5.0V, V
0.784
2550
MIN.
1.00
0.65
- 0.1
- 0.1
0.15
V
0.25
600
170
100
900
200
V
0.5
1.0
OUT(E)
1.8
IN
-
-
-
-
-
-
-
-
-
-
-
-
SS
-
CEH
=Nominal Voltage, applied voltage sequence is
.
±100
0.200
0.800
3000
1050
TYP.
1.40
0.35
0.42
0.45
0.52
0.01
0.25
220
200
300
1.0
21
86
0
-
-
-
-
-
-
-
-
-
-
-
V
MAX.
0.816
3450
1350
IN
1.78
0.55
0.67
0.66
0.77
0.40
0.25
0.25
20.0
270
300
450
6.0
1.0
1.0
6.0
0.1
0.1
2.5
35
IN
0
-
-
-
-
- 1.0
-
minus 0.3V, and to the PWM
ppm/ ℃
UNIT
μA
μA
kHz
μA
μA
μA
mA
mA
mA
ms
ms
%
%
%
Ω
Ω
Ω
Ω
Ω
%
V
V
V
V
V
V
V
V
CIRCUIT
③
①
①
③
②
②
①
①
①
③
③
①
④
④
⑨
⑥
①
③
③
⑤
⑤
①
⑦
⑦
⑧
①
①
-
-