900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




  Microchip Technology Semiconductor Electronic Components Datasheet  

TC573302 Datasheet

(TC572502/3002/3302) Line Regulator Controller

No Preview Available !

TC57
Line Regulator Controller
Features
• Low Dropout Voltage: 100mV @ 650mA with
FZT749 PNP Transistor
• 2.7V to 8V Supply Range
• Low Operating Current: 50µA Operating,
0.2µA Shutdown
• Low True Chip Enable
• Output Accuracy < ±2%
• Small Package: 5-Pin SOT-23A
Applications
• Battery Operated Systems
• Portable Instruments
• High-Efficiency Linear Regulator
• Post-Regulator for SMPS
• Power Supply or Battery Back-Up Supply for
Memory
Device Selection Table
Part Number
Output
Voltage
Package
Temperature
Range
TC572502ECT 2.5V 5-Pin SOT-23A -40°C to +85°C
TC573002ECT 3.0V 5-Pin SOT-23A -40°C to +85°C
TC573302ECT 3.3V 5-Pin SOT-23A -40°C to +85°C
Other output voltages and package options are available.
Please contact Microchip Technology Inc. for details.
Package Type
5-Pin SOT-23A
SHDN
EXT
54
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
characteristics of the external pass transistor. For
example, a maximum output current of 650mA (with a
dropout voltage of 100mV) 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.
Functional Block Diagram
VIN +3.3V
FZT749
Q1
VOUT +3V
CIN
10µF
(Tantalum)
OFF
ON
RBE
47K
RB
1K
4
EXT
2 VIN
VOUT 3
TC573002ECT
5
SHDN
GND
1
CL
10µF
(Tantalum)
RL
3.3V Line Input, 3.0V, 500mA Output LDO
TC57
1 23
GND VIN VOUT
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ SC-74A.
© 2002 Microchip Technology Inc.
DS21437B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC573302 Datasheet

(TC572502/3002/3302) Line Regulator Controller

No Preview Available !

TC57
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage ........................................................+12V
Output Current .................................................... 50mA
Output Voltage............................. -0.3V to (VIN + 0.3V)
Power Dissipation.............................................150mW
Operating Temperature Range............. -40°C to +85°C
Storage Temperature Range .............. -40°C to +150°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.
TC55 ELECTRICAL SPECIFICATIONS
TC57EP3002 Electrical Characteristics: SHDN = GND, VIN = VOUT + 1V, VOUT = 3V to 5V, IOUT = 0, TA = 25°C, Test Circuit of
Figure 3-1, unless otherwise noted. (Note 2)
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
VIN
VEXT
VOUT
VOUT
VIN - VOUT
IDD
ISHDN
VOUT/VIN
Input Voltage
Voltage on EXT Output
Output Voltage
Load Regulation
Dropout Voltage
Supply Current
Shutdown Supply Current
Line Regulation
—— 8 V
—— 8 V
0.98 X VR VR ±0.5% 1.02 X VR V IOUT = 50mA (Note 1)
-60 —
60 mV 1mA IOUT 100mA (Note 3)
— 100 — mV IOUT = 100mA (Note 2)
— 50 80 µA VSHDN = VIN = 5V
— — 0.6 µA VSHDN = GND
— 0.1 0.3 %/V IOUT = 50mA, 4V VIN 8V
(Note 3)
VOUT/T VOUT Temperature Coefficient
— ±100 — ppm/°C IOUT = 10mA, -40°C < TJ < +85°C
(Note 3)
ILEXT
EXT Pin Leakage Current
— — 0.5 µA
IEXT EXT Sink Current
— — 25 mA Note 4
VIH
SHDN Input High Logic Threshold
1.5
V
VIL
SHDN Input Low Logic Threshold
— 0.25 V
IIH SHDN Input Current @ VIH
— — 0.1 µA VSHDN = VIN = 5V
IIL SHDN Input Current @ VIL
-0.2 -0.05
0
µA VSHDN = GND
Note
1: VR is the regulator output voltage setting.
2: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at a
1V differential.
3: Varies with type of pass transistor used. Numbers shown are for the test circuit of Figure 3-1.
4: The product of IEXT X VEXT must be less than the maximum allowable power dissipation.
DS21437B-page 2
© 2002 Microchip Technology Inc.


Part Number TC573302
Description (TC572502/3002/3302) Line Regulator Controller
Maker Microchip Technology
Total Page 16 Pages
PDF Download

TC573302 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 TC573302 (TC572502/3002/3302) Line Regulator Controller
Microchip Technology





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy