参数资料
| 型号： | TC120303EHATR |
| 厂商： | Microchip Technology |
| 文件页数： | 2/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 3V 0.6A 8SOP |
| 标准包装： | 1,000 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3V |
| 输入电压： | 1.8 V ~ 10 V |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 600mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.173"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOP |
TC120
1.0
ELECTRICAL
CHARACTERISTICS
*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
Absolute Maximum Ratings*
Power Supply Voltage (V IN ).................... -0.3V to +12V
Voltage on V OUT Pin ............................... -0.3V to +12V
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.
Voltage on LX, Boost Pins
................................... (V IN – 12V) to (V IN + 0.3V)
Voltage on EXT1, EXT2, SHDN Pins
.......................................... (-0.3V) to (V IN + 0.3V)
L X 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
TC120 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Test circuit of Figure 3-1, T A = 25 ° C, V IN = V R x 1.2, Note 1 unless otherwise noted.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
V OUT
Output Voltage
V R x 0.975 V R ± 0.5% V R x 1.025
V
V OUT = 3.0V I OUT = 120mA (Note 1)
V OUT = 3.3V I OUT = 132mA
V OUT = 5.0V I OUT = 200mA
V IN
Input Voltage
1.8
—
10.0
V
I OUT MAX Maximum Output Current
500
600
600
—
—
—
—
—
—
mA
V OUT = 3.0V
V OUT = 3.3V
V OUT = 5.0V
I IN
Supply Current
—
52
82
μ A
V OUT = 3.0V V IN = V R x 1.05, no load
55
71
86
110
V OUT = 3.3V
V OUT = 5.0V
I SHDN
I LX
Shutdown Supply Current
LX Pin Leakage Current
—
—
1.5
—
2.5
2
μ A
μ A
No load, SHDN = 0V, (Note 2)
Measured at EXT1 Pin (Note 2)
—
1.5
2.5
No load, SHDN = 0V
R DSON ( L LX Pin ON Resistance
X )
—
—
—
0.69
0.64
0.44
0.94
0.85
0.58
?
V OUT = 3.0V V OUT = V R x 0.9 (Note 2)
V OUT = 3.3V V LX = V IN – 0.2V, 10 ?
V OUT = 5.0V Resistor from L X to V IN ,
SHDN = V IN
R EXTH
EXT1, EXT2
On Resistance to V IN
—
—
38
35
52
47
?
V OUT = 3.0V SHDN = V IH ; EXT1 and EXT2
V OUT = 3.3V connected to 200 ? load,
—
24
32
V OUT = 5.0V V EXT1 = V EXT2 = (V IN – 0.4V);
V OUT = V IN (Note 2)
R EXTL
EXT1, EXT2
On Resistance to GND
—
—
—
31
29
20
41
37
26
?
V OUT = 3.0V SHDN = V IH ; EXT1 and EXT2
V OUT = 3.3V pulled up through a series
V OUT = 5.0V resistance of 200 ? to a voltage
such that VEXT1, 2 = 0.4V
f OSC
Oscillator Frequency
255
300
345
kHz
Measured at EXT1 Pin,
V IN = V OUT + 0.3V,
I OUT = 20mA (Note 3)
D PWM
Maximum PWM Duty Cycle
—
—
100
%
D PFM
η
PFM Duty Cycle
Efficiency
15
—
25
95
35
—
%
%
No load
V IN > V R x 1.2
Note
1:
2:
3:
V R is the factory-programmed output voltage setting.
No external components connected, except C SS.
While operating in PWM Mode.
DS21365B-page 2
2002 Microchip Technology Inc.
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