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參數(shù)資料
| 型號(hào)： | TC575902ECTTR |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO5 |
| 封裝： | EIAJ, SC-74A, SOT-23A, 5 PIN |
| 文件頁(yè)數(shù)： | 1/11頁(yè) |
| 文件大小： | 72K |
| 代理商： | TC575902ECTTR |
TC57 Series
TC57-2 1/25/00
2001 Microchip Technology Inc.
DS21437A
FEATURES
s
Low Dropout Voltage:
100 mV @ 650 mA with FZT749 PNP Transistor
s
Output Voltage: 2V to 6V in 0.1V Increments
s
2.7V to 8V Supply Range
s
Low Operating Current: ...........................................
50
AOperating; 0.2 A Shutdown
s
Low-True Chip Enable
s
Output Accuracy <
±2%
s
Small Package: 5-Pin SOT-23A
TYPICAL APPLICATIONS
s
Battery Operated Systems
s
Portable Instruments
s
High-Efficiency Linear Regulator
s
Post-Regulator for SMPS
s
Power Supply or Battery Back-Up Supply for
Memory
GENERAL DESCRIPTION
The TC57 is a low dropout regulator controller that
operates with an external PNP pass transistor, allowing the
user to tailor the LDO characteristics to suit the application
at hand. This results in lower dropout operation (and often
lower cost) compared with traditional linear regulators with
on-board pass transistors. The maximum output current of
a TC57-based regulator circuit is limited only by the charac-
teristics of the external pass transistor. For example, a
maximum output current of 650 mA (with a dropout voltage
of 100 mV) results when an FZT749 pass transistor is used,
while a Darlington configuration can deliver up to 4A.
Flexibility, and superior performance make this family of
regulator controllers the ideal choice in applications where
low dropout voltage and low installed cost are key.
TYPICAL APPLICATION
PIN CONFIGURATION
Output Voltage:
Ex: 30 = 3.0V
Tolerance:
2 =
±2%
Temperature/Package:
E: –40
°C to +85°C
CT: 5-Pin SOT-23A
Taping Direction:
TR: Standard Taping
RT: Reverse Taping
PART CODE TC57 XX 02 ECT XX
ORDERING INFORMATION
SHDN
VOUT
GND
TC57
1
2
3
5
EXT
VIN
4
*5-Pin SOT-23A
TC573002ECT
VOUT
GND
SHDN
VIN
EXT
CIN
10
F
(Tantalum)
FZT749
Q1
RB
1K
CL
10
F
(Tantalum)
RL
VIN +3.3V
RBE
47K
1
2
ON
OFF
3
4
5
VOUT +3V
3.3V Line Input, 3.0V, 500 mA Output LDO
Note: * 5-Pin SOT-23A is equivalent to the EIAJ SC-74A
Linear Regulator Controller
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