XC9236A33DMR Torex Semiconductor Ltd, XC9236A33DMR Datasheet - Page 9

• 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)08Cxx, FB Type, f
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
Maximum Output Current
Operating Voltage Range
PFM Switching Current
PWM "H" Level Voltage
PWM "L" Level Voltage
Oscillation Frequency
*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
Maximum Duty Cycle
Minimum Duty Cycle
*5: When temperature is high, a current of approximately 10μA (maximum) may leak.
*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,
*1: Including hysteresis operating voltage range.
*2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100
*3: ON resistance (Ω)= (V
*4: R&D value
→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
CE "H" Voltage
CE "H" Current
Supply Current
Output Voltage
CE "L" Current
CE "L" Voltage
UVLO Voltage
PARAMETER
CL Discharge
IN
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
Efficiency
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)
IN
- Lx pin measurement voltage) / 100mA
PFM
(V
FB
DTY
SYMBOL
OUT
and DTY
OSC
DTY
with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating.
ILeakH
DTY
I
△V
V
V
V
R
OUTMAX
V
EFFI
R
R
R
R
V
V
f
I
・△Topr)
I
V
I
I
t
SHORT
V
LIMIT_PFM
I
PWMH
PWMH
I
PWML
t
DCHG
UVLO
STB
OSC
PFM
CEH
CEL
LAT
L ｘ H
L ｘ H
LIM
CEH
DD
L ｘ L
L ｘ L
CEL
SS
=1.2MHz, Ta=25℃
FB
IN
OUT
MAX
MIN
/
and V
LIMIT_PFM
PWML
V
decreasing FB pin voltage from 0.9V.
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
When connected to external components,
I
frequency becomes 1020kHz≦f
(*13)
When connected to external components,
I
frequency becomes f
V
V
When connected to external components,
V
V
resistance
V
decreasing FB pin voltage from 0.4V.
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
= V
=V
=5.0V, V
= 3.2V, V
=3.2V, V
= V
= V
= V
= V
= V
= V
= V
= V
=1mA
=1mA
= V
=5.0V, V
= V
= 5.0V ,L
= V
=0.72V, Applied voltage to V
=0.72V, Applied voltage to V
= V
= 0V → V
=30mA
CE
CE
IN
CE
IN
CE
CE
CE
CE
CE
CE
FB
CE
CE
CE
IN
=5.0V, V
=5.0V, V
=2.0V I
= 5.0V, V
, 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)
(*7)
CE
FB
CE
CE
CE
, Voltage which oscillation
, Voltage which oscillation
X
CE
=1.0V
= 0.4V,
=0V, V
= 5.0V, V
=1.0V, I
= V
= 0V, V
IN
FB
CONDITIONS
OUT
(*4)
(*4)
IN
FB
, I
=0.64, Short Lx at 1Ω
IN
FB
FB
FB
FB
CE
minus 1.0V and equal to or greater than V
= 0.88V
FB
FB
OUT
=1mA
OUT
, I
= 0.72V
= 0.88V
= 0.72V
=0.72V
FB
OSC
= 0.72V,IL
= 0.72V,IL
= 0V, L
=1mA
FB
OUT
OUT
FB
= 0.88V
FB
= 100mA
CE
＜1020kHz
=0.72V
at Lx=”High"
=1mA
at Lx=”Low"
=100mA
(*12)
= 0V, V
X
(*8)
= 0V
X
X
(*12)
(*11)
(*11)
OSC
CE
= 100mA
= 100mA
FB
CE
,
≦1380kHz
= open
(*13)
,
(*11)
(*1,*11)
(*11)
while
(*9)
(*3)
(*3)
while
IN
=5.0V, V
0.784
MIN.
1020
1.00
0.65
- 0.1
- 0.1
0.15
V
0.25
600
120
100
900
200
V
0.5
1.0
OUT(E)
1.8
IN
-
-
-
-
-
-
-
-
-
-
-
-
SS
XC9235/XC9236/XC9237
-
CEH
=Nominal Voltage, applied voltage sequence is
.
±100
0.200
1200
1050
TYP.
0.800
1.40
0.35
0.42
0.45
0.52
0.01
0.25
160
200
300
1.0
15
92
0
-
-
-
-
-
-
-
-
-
-
-
V
0.816
MAX.
1380
1350
IN
1.78
0.55
0.67
0.66
0.77
0.25
0.40
20.0
0.25
200
450
6.0
1.0
1.0
6.0
0.1
0.1
2.5
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
Series
CIRCUIT
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