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TC595002ECBTR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
2001-2012 Microchip Technology Inc. DS21438C-page 1
TC59
Features
• Low Dropout Voltage
- Typically 120mV @ 50mA; 380mV @ 100mA
for -5.0V Output Part
• Tight Output Voltage Tolerance: ±2% Max
• Low Supply Current: 3.5A, Typ
• Small Package: 3-Pin SOT-23A
Applications
• Cellular Phones
• Battery Operated Systems
• Palmtops
• Portable Cameras
Device Selection Table
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
General Description
The TC59 is a low dropout, negative output voltage
regulator designed specifically for battery-operated
systems. Its full CMOS construction eliminates the
wasted ground current typical of bipolar LDOs. This
reduced supply current significantly extends battery
life, particularly when the TC59 is operated in dropout.
Other TC59 key features include low supply current
(typically 3.0A) and low dropout operation (typically
120mV at 50mA). The TC59 is packaged in a small
3-Pin SOT-23A package.
Functional Block Diagram
Part Number
Output
Voltage
Package
Temperature
Range
TC593002ECB 3.0V 3-Pin SOT-23A -40°C to +85°C
TC595002ECB 5.0V 3-Pin SOT-23A -40°C to +85°C
V
SS
3-Pin SOT-23A
TC59
1
4
2
-V
IN
-V
OUT
NOTE: 3-Pin SOT-23A is equivalent to the EIAJ SC59
-V
IN
1µF
1µF
-V
OUT
-V
OUT
TC59
1
2
3
-V
IN
V
SS
+
+
_
_
Low Dropout, Negative Output Voltage Regulator
TC59
DS21438C-page 2 2001-2012 Microchip Technology Inc.
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage .........................................................-12V
Output Current ..................................................200mA
Output Voltage..................... -V
DD
– 0.3V to V
IN
+ 0.3V
Power Dissipation.............................................150mW
Operating Temperature Range.............-40°C to +85°C
Storage Temperature Range..............-40°C to +125°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.
TC59 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: V
IN
= V
R
– 1.0V (Note 1), C
L
= 10F, T
A
= 25°C unless otherwise noted.
Symbol Parameter Min Typ Max Units Test Conditions
V
IN
Input Voltage — — -10 V I
OUT
= 20mA
I
DD
Supply Current — 3 7 A
I
OUT(MAX)
Maximum Output Current 100
80
60
—
—
—
—
—
—
mA
mA
mA
V
IN
= -6.0V; V
R
= -5.0V, V
OUT
-4.5V
V
IN
= -5.0V; V
R
= -4.0V, V
OUT
-3.6V
V
IN
= -4.0V; V
R
= -3.0V, V
OUT
-2.7V
V
OUT
Output Voltage 1.02 X V
R
— 0.98 x V
R
VI
OUT
= 20mA
TC V
OUT
Output Voltage
Temperature Coefficient
— ±100 — ppm/°C I
OUT
= 20mA
V
OUT
/
(V
IN
X V
OUT
)
Line Regulation — 0.1 0.3 %/V I
OUT
= 20mA; V
R
= -5.0V; -6.0 < V
IN
< -10.0V
V
R
= -4.0V; -5.0 < V
IN
< -10.0V
V
R
= -3.0V; -4.0 < V
IN
< -10.0V
V
OUT
Load Regulation — 40 80 mV V
R
= -5.0V; 1mA < I
OUT
< 50mA
V
R
= -4.0V; 1mA < I
OUT
< 45mA
V
R
= -3.0V; 1mA < I
OUT
< 40mA
V
IN
- V
OUT
Dropout Voltage —
—
—
—
—
—
120
380
120
380
120
380
300
600
300
600
300
600
mV
mV
mV
mV
mV
mV
V
R
= -5.0V; I
OUT
= 50mA
I
OUT
= 100mA
V
R
= -4.0V; I
OUT
= 45mA
I
OUT
= 90mA
V
R
= -3.0V; I
OUT
= 40mA
I
OUT
= 80mA
Note 1: V
R
is the regulator output voltage setting. For example: V
R
= -2.5V, -2.7V, -3.0V, -3.3V, -3.6V, -4.0V, -5.0V.
2001-2012 Microchip Technology Inc. DS21438C-page 3
TC59
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: PIN FUNCTION TABLE
3.0 DETAILED DESCRIPTION
The TC59 is a low quiescent current, precision fixed
negative output voltage LDO. Unlike bipolar linear
regulators, the TC59 supply current does not increase
proportionally with load current.
3.1 Output Capacitor
A minimum of 1F tantalum output capacitor is
required. The requirements for the output capacitor are
an equivalent series resistance (esr) greater than 0.1
and less than 5, with a self-resonant frequency
greater than 1MHz. To improve supply noise rejection
and transient response, larger output capacitors can be
used. Care should be taken when increasing C
OUT
, that
the input impedance is not high enough to cause high
input impedance oscillation.
3.2 Input Capacitor
A 1F input capacitor is recommended for most
applications when the input impedance is on the order
of 10. When operating off of a battery input, or there
is a large distance from the input source to the LDO,
larger input capacitance may be required for stability.
When large values of output capacitance are used, the
input capacitance should be increased to prevent high
source impedance oscillations.
Pin No.
(3-Pin SOT-23A)
Symbol Description
1V
OUT
Regulated voltage output.
2V
IN
Supply voltage input.
3V
SS
Ground.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

TC595002ECBTR

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Manufacturer:
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Description:
LDO Voltage Regulators 5V LDO Neg Output
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