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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1071 Datasheet

CMOS LDOs

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TC1071 pdf
TC1070/TC1071/TC1187
50 mA, 100 mA and 150 mA Adjustable CMOS LDOs with Shutdown
Features:
• 50 µA Ground Current for Longer Battery Life
• Adjustable Output Voltage
• Very Low Dropout Voltage
• Choice of 50 mA (TC1070), 100 mA (TC1071)
and 150 mA (TC1187) Output
• Power-Saving Shutdown mode
• Overcurrent and Overtemperature Protection
• Space-Saving 5-Pin SOT-23 Package
• Pin Compatible with Bipolar Regulators
Applications:
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulators for SMPS
• Pagers
Typical Application
VIN 1 VIN
VOUT 5
TC1070
TC1071
2
TC1187
GND
C1 +
1 µF
VOUT
R1
3
SHDN
4
ADJ
R2
Shutdown Control
(from Power Control Logic)
VOUT = VREF RR-----12- + 1
Description:
The TC1070, TC1071 and TC1187 devices are
adjustable LDOs designed to supersede a variety of
older (bipolar) voltage regulators. Total supply current
is typically 50 µA at full load (20 to 60 times lower than
in bipolar regulators).
The devices’ key features include ultra low-noise
operation, very low dropout voltage – typically 85 mV
(TC1070), 180 mV (TC1071) and 270 mV (TC1187) at
full load and fast response to step changes in load.
Supply current is reduced to 0.5 µA (maximum) when
the shutdown input is low. The devices incorporate both
overtemperature and overcurrent protection. Output
voltage is programmed with a simple resistor divider
from VOUT to ADJ to GND.
The TC1070, TC1071 and TC1187 devices are stable
with an output capacitor of only 1 µF and have a
maximum output current of 50 mA, 100 mA and
150 mA, respectively. For higher output versions
please see the TC1174 (IOUT = 300 mA) data sheet
(DS21363).
Package Type
5-Pin SOT-23
VOUT
ADJ
54
TC1070
TC1071
TC1187
1 23
VIN GND SHDN
2010 Microchip Technology Inc.
DS21353E-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1071 Datasheet

CMOS LDOs

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TC1071 pdf
TC1070/TC1071/TC1187
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings†
Input Voltage .........................................................6.5V
Output Voltage........................... (-0.3V) to (VIN + 0.3V)
Power Dissipation................Internally Limited (Note 5)
Maximum Voltage on Any Pin ........VIN +0.3V to -0.3V
Operating Temperature Range...... -40°C < TJ < 125°C
Storage Temperature..........................-65°C to +150°C
† Notice: 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.
ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VIN = VOUT + 1V, IL = 0.1 mA, CL = 3.3 µF, SHDN > VIH, TA = +25°C, unless otherwise
noted. Boldface type specifications apply for junction temperatures of -40°C to +125°C.
Parameter
Symbol
Min Typ Max Units
Test Conditions
Input Operating Voltage
Maximum Output Current
Adjustable Output
Voltage Range
Reference Voltage
VREF Temperature Coefficient
Line Regulation
Load Regulation (Note 2)
VIN
IOUTmax
VOUT
VREF
VREF/T
VOUT/VIN
VOUT/VOUT
2.7
50
100
150
VREF
1.165
Note 1: TC VOUT = (VOUTmax – VOUTMIN) x 106
VOUTx T
1.20
40
0.05
0.5
0.5
6.0 V Note 6
— mA TC1070
TC1071
TC1187
5.5 V
1.235
0.35
2
3
V
ppm/°C
%
%
Note 1
(VR + 1V) VIN6V
TC1070, TC1071
IL = 0.1 mA to IOUTmax
TC1187
IL = 0.1 mA to IOUTmax
2: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regu-
lation is tested over a load range from 0.1 mA to the maximum specified output current. Changes in output
voltage due to heating effects are covered by the thermal regulation specification.
3: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its
nominal value.
4: Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipa-
tion is applied, excluding load or line regulation effects. Specifications are for a current pulse equal to
Ilmax at VIN = 6V for T = 10 ms.
5: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable
junction temperature and the thermal resistance from junction-to-air (i.e., Ta, Tj, ja). Exceeding the maxi-
mum allowable power dissipation causes the device to initiate thermal shutdown. Please see Section 5.0
“Thermal Considerations” for more details.
6: The minimum VIN has to justify the conditions: VIN VR + VDROPOUT and VIN 2.7V for IL = 0.1 mA to
IOUTMAX.
DS21353E-page 2
2010 Microchip Technology Inc.


Part Number TC1071
Description CMOS LDOs
Maker Microchip
Total Page 17 Pages
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