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参数资料
| 型号： | TC105303ECTTR |
| 厂商： | Microchip Technology |
| 文件页数： | 2/14页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM SOT23A-5 |
| 标准包装： | 3,000 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 345kHz |
| 占空比： | 100% |
| 电源电压： | 2.2 V ~ 10 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | SC-74A，SOT-753 |
| 包装： | 带卷 (TR) |
TC105
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*
Voltage on V DD ....................................... -0.3V to +12V
EXT Output Current ........................................±100mA
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 V OUT , EXT,
SHDN Pins .....................................-0.3V to V DD +0.3V
Power Dissipation.............................................150mW
Operating Temperature Range............. -40°C to +85°C
Storage Temperature Range .............. -40°C to +125°C
TC105 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Note 1, f OSC = 300 kHz; T A = 25°C, unless otherwise noted.
Symbol
V DD
V DD MIN
Parameter
Operating Supply Voltage
Minimum Input Voltage
Min
2.2
0.9
Typ
—
—
Max
10.0
2.2
Units
V
V
Test Conditions
EXT = High; No external components;
V OUT = 0V, SHDN = V IN
I DD
Operating Supply Current
—
57
102
μ A
No external components; V R = 3.0V, 3.3V
—
67
122
V OUT = 0V, SHDN = V IN V R = 5.0V
I STBY
I SHDN
f OSC
V OUT
Standby Supply Current
Shutdown Supply Current
Oscillator Frequency
Output Voltage
—
—
—
255
V R x 0.975
15
16
—
300
V R
27
29
0.5
345
V R x 1.025
μ A
μ A
kHz
No external components; V R = 3.0V, 3.3V
V OUT = SHDN = V IN
V R = 5.0V
SHDN = GND
V IN = V OUT + 0.3V
Note 2
DTYMAX Maximum Duty Cycle (PWM Mode)
100
—
—
%
DTYPFM Duty Cycle (PFM Mode)
15
25
35
%
I OUT = 0mA
V IH
V IL
REXTH
SHDN Input Logic High
SHDN Input Logic Low
EXT ON Resistance to V DD
0.65
—
—
—
—
17
—
0.20
24
V
V
?
V OUT = 0V, No external components
V OUT = 0V, No external components
No external components; V R = 3.0V
—
—
16
12
22
17
V R = 3.3V
V R = 5.0V
V OUT = SHDN = V IN , V EXT = (V IN – 0.4V)
REXTL
EXT ON Resistance to GND
—
15
20
?
No external components; V R = 3.0V
—
—
14
10
19
14
V R = 3.3V
V R = 5.0V
V OUT = 0V, SHDN = V IN , V EXT = 0.4V
η
Efficiency
—
92
—
%
Note
1:
2:
V R = 3.0V, V IN = 4.5V, I OUT = 200mA
V R = 3.3V, V IN = 5.0V, I OUT = 220mA
V R = 5.0V, V IN = 7.5V, I OUT = 320mA
V R is the factory output voltage setting.
DS21349B-page 2
2002 Microchip Technology Inc.
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