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| 型号： | TC115501ECT |
| 元件分类： | 稳压器 |
| 英文描述： | 0.4 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | SOT-89, 5 PIN |
| 文件页数： | 7/14页 |
| 文件大小： | 468K |
| 代理商： | TC115501ECT |
TC115
DS21361B-page 2
2002 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Power Supply Voltage (PS) .................................... 12V
Power Dissipation.............................................500mW
LX Sink Current ............................................ 400mA pk
SHDN Input Voltage ............................................... 12V
Operating Temperature Range............. -40°C to +85°C
Storage Temperature Range .............. -40°C to +125°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.
TC115 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VOUT =5V, TA = 25°C, unless otherwise noted. Circuit configuration per Figure 4-1.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
VIN
Operating Supply Voltage
0.9
—
10.0
V
Note 5
VSTART
Start-Up Supply Voltage
—
0.9
V
IOUT =1mA
ILXMAX
LX Maximum Sink Current
—
350
mA
fLIM
LX Limit Frequency
—
200
—
kHz
VLX =VLXLIM
VLXLIM
LX Limit Voltage
0.7
—
1.3
V
Note 2
IDD
No Load Supply Current
—
13
26
AIOUT =0, VIN =VOUT x 0.8 (Note3)
ICC
Boost Mode Supply Current
—
80
135
A
No external components,
VIN =(0.95 x VOUT) applied to PS (or VDD) input
ISTBY
Standby Supply Current
—
9
17
A
No external components,
VIN =(1.1x VOUT) applied to PS (or VDD) input
ISD
Shutdown Supply Current
—
0.5
A
SHDN =0V
fOSC
Oscillator Frequency
85
100
115
kHz
Note 2, Note 4
VOUT
Output Voltage
VR x0.975
VR
VR x1.025
V
VIN =2.2V minimum (Note1)
RSWON
LX Output ON Resistance
—
1.4
2.4
VLX =0.4V
PFMDUTY Duty Cycle
(PFM Operating Mode)
10
17
25
%
No external components.
MAXDUTY Maximum Duty Cycle
80
87
92
%
Note 4
tSS
Soft Start Time
4
10
20
msec
η
Efficiency
—
85
—
%
VIH
SHDN Input Logic High
0.75
—
V
VIL
SHDN Input Logic Low
—
0.20
V
Note
1:
VR is the nominal factory-programmed output voltage setting.
2:
VLXLIM is the voltage on the LX pin (with internal switch ON) that will cause the oscillator to run at twice nominal frequency in to limit the
switch current through the internal N-channel switching transistor.
3:
Measured with D1 = MA735 (reverse current < 1
A at a reverse voltage of 10V).
4:
With TC115 operating in PWM mode.
5:
See Section 3.4 “Behavior When VIN is Greater Than the Factory-Programmed VOUT Setting”.
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