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參數資料
| 型號： | TC105503ECT |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | PFM/PWM Step-Down DC/DC Controller |
| 中文描述： | 烤瓷/ PWM降壓DC / DC控制器 |
| 文件頁數： | 1/14頁 |
| 文件大小： | 433K |
| 代理商： | TC105503ECT |
2002 Microchip Technology Inc.
DS21349B-page 1
TC105
Features
57
μ
A (Typ) Supply Current
1A Output Current
0.5
μ
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
Microchip Technology Inc. for details.
output
voltages
are
available.
Please
contact
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
μ
H) inductors. Supply current draw is only
102
μ
A (max), and is reduced to less than 0.5
μ
A when
the SHDN input is brought low. Regulator operation is
suspended during shutdown. The TC105 accepts a
maximum input voltage of 10V.
The TC105 is available in a small 5-Pin SOT-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
°
C to +85
°
C
-40
°
C to +85
°
C
-40
°
C to +85
°
C
TC105333ECT
3.3
5-Pin SOT-23A
300
TC105303ECT
3.0
5-Pin SOT-23A
300
TC105
1
2
3
5
4
V
DD
GND
5-Pin SOT-23A
NOTE:
5-Pin SOT-23A is equivalent to the EIAJ SC-74A
V
OUT
SHDN
EXT
(From System
5
4
TC105333ECT
1
3
2
V
DD
EXT
GND
V
OUT
ON
OFF
SHDN
3.3V
V
OUT
L
1
22
μ
H (Sumida CD54)
D
1
MA737
Si 9430
P
V
BATT
6V
NiMH
C
1
10
μ
F/16V
R
SS
470K
C
0.033
μ
F
C2
47
μ
F
10V
Tantalum
3.3V Regulated Supply Using 6V
NiMH Battery Pack Input
+
–
PFM/PWM Step-Down DC/DC Controller
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| TC1073-28VCH | Circular Connector; No. of Contacts:55; Series:; Body Material:Aluminum; Connecting Termination:Solder; Connector Shell Size:22; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:22-55 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TC105503ECTTR | 功能描述:開關變換器、穩壓器與控制器 PFM/PWM Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TC1055-1.8VCT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:50mA, 100mA and 150mA CMOS LDOs with Shutdown and ERROR Output |
| TC1055-1.8VCT713 | 功能描述:低壓差穩壓器 - LDO .1mA w/Shtdn & Error 1.8V 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 |
| TC1055-2.5VCT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:50mA, 100mA and 150mA CMOS LDOs with Shutdown and ERROR Output |
| TC1055-2.5VCT713 | 功能描述:低壓差穩壓器 - LDO .1mA w/Shtdn & Error 2.5V 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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