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參數資料
| 型號： | TC105333ECTTR |
| 元件分類： | 穩壓器 |
| 英文描述： | 0.1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | EIAJ, SC-74A, SOT-23A, 5 PIN |
| 文件頁數： | 1/14頁 |
| 文件大小： | 433K |
| 代理商： | TC105333ECTTR |
2002 Microchip Technology Inc.
DS21349B-page 1
TC105
Features
57
A (Typ) Supply Current
1A Output Current
0.5
A Shutdown Mode
300kHz Switching Frequency for Small Inductor
Size
Programmable Soft-Start
92% Typical Efficiency
Small Package: 5-Pin SOT-23A
Applications
Palmtops
Battery-Operated Systems
Portable Instruments
Positive LCD Bias Generators
Portable Communicators
Hand-Held Scanners
5V to 3V Down Converters
Device Selection Table
*Other
output
voltages
are
available.
Please
contact
Microchip Technology Inc. for details.
Package Type
General Description
The TC105 is a step-down (Buck) switching controller
that furnishes output currents of up to 1A (max) while
delivering a typical efficiency of 92%. The TC105
normally operates in pulse width modulation mode
(PWM), but automatically switches to pulse frequency
modulation (PFM) at low output loads for greater
efficiency. Oscillator frequency is 300kHz, allowing use
of small (22
H) inductors. Supply current draw is only
102
A (max), and is reduced to less than 0.5Awhen
the SHDN input is brought low. Regulator operation is
suspended during shutdown. The TC105 accepts a
maximum input voltage of 10V.
TheTC105 is availableinasmall 5-PinSOT-23A
package, occupies minimum board space and is ideal
for a wide range of applications.
Functional Block Diagram
Part
Number
Output
Voltage
(V)*
Package
Osc.
Freq.
(kHz)
Operating
Temp.
Range
TC105503ECT
5.0
5-Pin SOT-23A
300
-40
°Cto +85°C
TC105333ECT
3.3
5-Pin SOT-23A
300
-40
°Cto +85°C
TC105303ECT
3.0
5-Pin SOT-23A
300
-40
°Cto +85°C
TC105
1
23
5
4
VDD
GND
5-Pin SOT-23A
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ SC-74A
VOUT
SHDN
EXT
(From System
Control Logic)
5
4
TC105333ECT
1
3
2
VDD
EXT
GND
VOUT
ON
OFF
SHDN
3.3V
VOUT
L1 22H (Sumida CD54)
D1
MA737
Si 9430 P
VBATT
6V
NiMH
C1 10F/16V
RSS 470K
CSS
0.033
F
C2
47
F
10V
Tantalum
3.3V Regulated Supply Using 6V
NiMH Battery Pack Input
+
–
PFM/PWM Step-Down DC/DC Controller
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相關代理商/技術參數 |
參數描述 |
|---|---|
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| TC1054-1.8VCT713 | 功能描述:低壓差穩壓器 - LDO 50mA LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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