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参数资料
型号： TC120333EHA
元件分类： 稳压器
英文描述： 0.7 A SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO8
封装： LOW PROFILE, SOP-8
文件页数： 7/14页
文件大小： 436K
代理商： TC120333EHA
TC120
DS21365B-page 2
2002 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Power Supply Voltage (VIN).................... -0.3V to +12V
Voltage on VOUT Pin ............................... -0.3V to +12V
Voltage on LX, Boost Pins
................................... (VIN – 12V) to (VIN +0.3V)
Voltage on EXT1, EXT2, SHDN Pins
.......................................... (-0.3V) to (VIN +0.3V)
LX Pin Current .............................................. 700mA pk
EXT1, EXT2 Pin Current ...................................±50mA
Continuous Power Dissipation .........................300mW
Operating Temperature Range............. -40°C to +85°C
Storage Temperature Range .............. -40°C to +150°C
*Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. These
are stress ratings only and functional operation of the device
at these or any other conditions above those indicated in the
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.
TC120 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Test circuitofFigure 3-1, TA =25°C, VIN =VR x 1.2, Note 1 unless otherwise noted.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
VOUT
Output Voltage
VR x0.975 VR ±0.5% VR x1.025
V
VOUT =3.0V
VOUT =3.3V
VOUT =5.0V
IOUT = 120mA (Note 1)
IOUT = 132mA
IOUT = 200mA
VIN
Input Voltage
1.8
—
10.0
V
IOUTMAX Maximum Output Current
500
600
—
mA
VOUT =3.0V
VOUT =3.3V
VOUT =5.0V
IIN
Supply Current
—
52
55
71
82
86
110
AV
OUT =3.0V
VOUT =3.3V
VOUT =5.0V
VIN =VR x 1.05, no load
ISHDN
Shutdown Supply Current
—
1.5
2.5
A
No load, SHDN =0V, (Note 2)
ILX
LX Pin Leakage Current
—
1.5
2
2.5
A
Measured at EXT1 Pin (Note 2)
No load, SHDN =0V
RDSON(L
X
)
LX Pin ON Resistance
—
0.69
0.64
0.44
0.94
0.85
0.58
VOUT =3.0V
VOUT =3.3V
VOUT =5.0V
VOUT =VR x0.9 (Note2)
VLX =VIN –0.2V, 10
Resistor from LX to VIN,
SHDN =VIN
REXTH
EXT1, EXT2
On Resistance to VIN
—
38
35
24
52
47
32
VOUT =3.0V
VOUT =3.3V
VOUT =5.0V
SHDN =VIH; EXT1 and EXT2
connected to 200
load,
VEXT1 =VEXT2 =(VIN –0.4V);
VOUT =VIN (Note 2)
REXTL
EXT1, EXT2
On Resistance to GND
—
31
29
20
41
37
26
VOUT =3.0V
VOUT =3.3V
VOUT =5.0V
SHDN =VIH; EXT1 and EXT2
pulled up through a series
resistance of 200
to a voltage
such that VEXT1, 2 = 0.4V
fOSC
Oscillator Frequency
255
300
345
kHz
Measured at EXT1 Pin,
VIN =VOUT +0.3V,
IOUT =20mA (Note 3)
DPWM
Maximum PWM Duty Cycle
—
100
%
DPFM
PFM Duty Cycle
15
25
35
%
No load
η
Efficiency
—
95
—
%
VIN >VR x1.2
Note
1:
VR is the factory-programmed output voltage setting.
2:
No external components connected, except CSS.
3:
While operating in PWM Mode.
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