TC59
LOW DROPOUT, NEGATIVE OUTPUT VOLTAGE REGULATOR
FEATURES
s
s
s
s
s
Low Dropout Voltage (Typically 120mV at 50mA;
380mV at 100mA) for –5.0V Output Part
Tight Output Voltage Tolerance (
±
2%, Max)
Low Supply Current (3.5
µ
A, Typ)
Factory-Programmed Output Voltages of –2.1V to
–6.0V in 100mV Increments
Space-Saving 3-Pin SOT-23A Package
GENERAL DESCRIPTION
The TC59 is a low dropout, negative output voltage
regulator designed specifically for battery-operated sys-
tems. 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 3.0µA) and low dropout operation (typically 120mV
at 50mA). Factory-programmed output voltages of
–2.1V to –6.0V in 100mV steps are available. The TC59 is
packaged in a tiny 3-Pin SOT-23A package.
TYPICAL APPLICATIONS
s
s
s
s
Cellular Phones
Battery Operated Systems
Palmtops
Portable Cameras
ORDERING INFORMATION
PART CODE
TC59
TC59
30 02 ECB XX
50 02 ECB XX
TYPICAL APPLICATION
Output Voltage:
Ex: 50 = –5.0V; 30 = –3.0V
3
VSS
Max Output Tolerance:
Ex: 02 = 2%; 01 = 1%
–VIN
2
–V
IN
TC59
–VOUT
1
–V
OUT
1µF
1µF
Package/Temperature
–40°C to
±85°C
3-Pin SOT-23A Package
Taping Direction:
TR = Standard
RT = Reverse
*Other voltages are available. Please contact Microchip
Technology Inc. for details.
PIN CONFIGURATION
3-Pin SOT-23A*
VSS
3
TC59
1
–VOUT
2
–VIN
NOTE: *3-Pin SOT-23A is equivalent to EIAJ SC59
© 2001 Microchip Technology Inc.
DS21438A
TC59-2 11/5/99
LOW DROPOUT, NEGATIVE OUTPUT
VOLTAGE REGULATOR
TC59
ABSOLUTE MAXIMUM RATINGS*
Input Voltage (V
IN
) .................................................... –12V
Output Current (I
OUT
) .............................................200mA
Output Voltage (V
OUT
) .............. –V
DD
– 0.3V to V
IN
+ 0.3V
Power Dissipation (Pd) ..........................................150mW
Operating Ambient Temperature (T
OPR
) .. –40°C to +85°C
Storage Temperature (T
STG
) .................. –40°C to +125°C
*Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
above those listed under Absolute Maximum Ratings may cause perma-
nent 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 operational sections of the specifications is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods
may affect device reliability.
ELECTRICAL CHARACTERISTICS:
V
IN
= V
R
– 1.0V; Note 1; C
L
= 10
µF;
T
A
= +25°C, unless otherwise specified.
Symbol
V
IN
I
DD
I
OUT(MAX)
Parameter
Supply Voltage
Supply Current
Maximum Output Current
Test Conditions
I
OUT
= 20mA
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
I
OUT
= 20mA
I
OUT
= 20mA
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
R
= –5.0V; 1mA<I
OUT
<50 mA
V
R
= –4.0V; 1mA<I
OUT
<45 mA
V
R
= –3.0V; 1mA<I
OUT
<40 mA
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
Min
—
—
100
80
60
1.02 x V
R
—
Typ
—
3
—
—
—
—
±100
Max
–10
7
—
—
—
0.98 x V
R
—
Unit
V
µA
mA
mA
mA
V
ppm/°C
V
OUT
TC V
OUT
∆V
OUT
/
(∆V
IN x
V
OUT
)
∆V
OUT
Output Voltage
Output Voltage
Temperature Coefficient
Line Regulation
0.1
0.3
%/V
Load Regulation
40
—
—
—
—
—
—
120
380
120
380
120
380
80
300
600
300
600
300
600
mV
mV
mV
mV
mV
mV
mV
V
IN
– V
OUT
Dropout Voltage
Notes:1.V
R
is the regulator output voltage setting. For example: V
R
= –2.5V, –3.6V, –4.0V, –2.7V, –3.0V, –3.3V, –5.0V.
PIN DESCRIPTION
Pin Number
1
2
3
Name
V
OUT
V
IN
V
SS
Description
Regulated Voltage Output
Supply Voltage Input
Ground
TC59-2
11/5/99
2
© 2001 Microchip Technology Inc.
DS21438A
LOW DROPOUT, NEGATIVE OUTPUT
VOLTAGE REGULATOR
TC59
TYPICAL CHARACTERISTICS CURVES
1. OUTPUT VOLTAGE vs. OUTPUT CURRENT
TC595002 (–5V)
V
TC595002 (–5V)
V
–6
–5.10
IN = –6.0V
IN = –6.0V
OUTPUT VOLTAGE:V
OUT
(V)
–5.05
–5.00
–4.95
–4.90
–4.85
–4.80
OUTPUT VOLTAGE:V
OUT
(V)
T
OPR
= –40°C
–5
–4
–3
–2
–1
0
0
50
100
150
200
OUTPUT CURRENT:I
OUT
(mA)
250
25°C
T
OPR
= –40°C
80°C
25°C
80°C
0
20
40
60
80
100
OUTPUT CURRENT:I
OUT
(mA)
TC594002 (–4V)
–4.10
OUTPUT VOLTAGE:V
OUT
(V)
VIN = –5.0V
TC594002 (–4V)
–5
VIN = –5.0V
–4.05
–4.00
–3.95
–3.90
–3.85
–3.80
0
OUTPUT VOLTAGE:V
OUT
(V)
T
OPR
= –40°C
–4
–3
25°C
–2
25°C
T
OPR
= –40°C
80°C
–1
80°C
0
0
200
250
50
100
150
OUTPUT CURRENT: I
OUT
(mA)
20
40
60
80
100
OUTPUT CURRENT: I
OUT
(mA)
TC593002 (–3V)
–3.10
VIN = –4.0V
TC593002 (–3V)
–4
OUTPUT VOLTAGE:V
OUT
(V)
VIN = –4.0V
OUTPUT VOLTAGE:V
OUT
(V)
–3.05
T
OPR
= –40°C
–3
T
OPR
= –40°C
–3.00
–2.95
–2.90
–2.85
–2.80
25°C
80°C
–2
25°C
–1
80°C
0
0
50
200
250
100
150
OUTPUT CURRENT: I
OUT
(mA)
TC59-2 11/5/99
0
20
40
60
80
100
OUTPUT CURRENT: I
OUT
(mA)
© 2001 Microchip Technology Inc.
DS21438A
3
LOW DROPOUT, NEGATIVE OUTPUT
VOLTAGE REGULATOR
TC59
TYPICAL CHARACTERISTICS CURVES (CONT.)
2. OUTPUT VOLTAGE vs. INPUT VOLTAGE
TC595002 (–5.0V)
–5.2
–5.10
OUTPUT VOLTAGE:V
OUT
(V)
TC595002 (–5.0V)
TOPR = 25¡C
OUTPUT VOLTAGE:VOUT(V)
–5.0
I
OUT
=1mA
40mA
–4.8
–5.05
–5.00
I
OUT
=1mA
40mA
20mA
–4.6
20mA
–4.95
–4.4
–4.90
–4.2
–4.5
–4.85
–5.0
INPUT VOLTAGE:V (V)
IN
–5.5
–5
–6
–7
–8
–9
–10
INPUT VOLTAGE:V
IN
(V)
TC594002 (–4.0V)
–4.2
TOPR = 25¡C
TC594002 (–4.0V)
–4.10
OUTPUT VOLTAGE:V
OUT
(V)
TOPR = 25¡C
(V)
OUT
–4.0
I
OUT
=1mA
–3.8
20mA
–3.6
40mA
–3.4
–4.05
I
OUT
=1mA
–4.00
40mA
20mA
–3.95
OUTPUT VOLTAGE:V
–3.90
–3.2
–3.5
–3.85
–4.0
INPUT VOLTAGE:V
IN
(V)
–4.5
–4
–5
–6
–7
–8
–9
–10
INPUT VOLTAGE:V
IN
(V)
TC593002 (–3.0V
)
–3.2
TC593002 (–3.0V)
–3.10
OUTPUT VOLTAGE:V
OUT
(V)
TOPR = 25¡C
TOPR = 25¡C
OUTPUT VOLTAGE:V
OUT
(V)
–3.0
I
OUT
= 1mA
–3.05
I
OUT
=1mA
–3.00
40mA
–2.95
20mA
–2.8
–2.6
20mA
40mA
–2.4
–2.2
–2.5
–2.90
–2.85
–3.0
INPUT VOLTAGE:V
IN
(V)
–3.5
–3
–4
–5
–6
–7 –8
–9 –10
INPUT VOLTAGE:V
IN
(V)
TC59-2
11/5/99
4
© 2001 Microchip Technology Inc.
DS21438A
LOW DROPOUT, NEGATIVE OUTPUT
VOLTAGE REGULATOR
TC59
TYPICAL CHARACTERISTICS CURVES (CONT.)
3. INPUT/OUTPUT VOLTAGE DIFFERENTIAL vs. OUTPUT CURRENT
TC595002 (–5.0V)
INPUT/OUTPUT VOLTAGE DIFF.:V
DIF
(V)
INPUT/OUTPUT VOLTAGE D
IFF
.:V
DIF
(V)
TC594002 (–4.0V)
800
800
600
600
400
T
OPR
=25°C
200
80°C
–40°C
0
0
60
100
40
80
20
OUTPUT CURRENT:I
OUT
(mA)
400
T
OPR
=25°C
200
80°C
–40°C
0
0
20
40
60
80
100
OUTPUT CURRENT:I
OUT
(mA)
TC593002 (–3.0V)
INPUT/OUTPUT VOLTAGE DIFF.:V
DIF
(V)
800
600
400
T
OPR
=25°C
200
80°C
–40°C
0
0
20
40
60
80
100
OUTPUT CURRENT:I
OUT
(mA)
4. SUPPLY CURRENT vs. INPUT VOLTAGE
TC595002 (–5.0V
)
5
4.0
SUPPLY CURRENT:I
SS
(µA)
TC595002 (–5.0V)
SUPPLY CURRENT:I
SS
(µA)
4
T
OPR
=25°C
3
80°C
3.5
3.0
2.5
T
OPR
=25°C
2.0
–40°C
1.5
1.0
80°C
2
–40°C
1
0
0
–4
–2
–6
–8
INPUT VOLTAGE:V
IN
(V)
–10
–5
–6
–7
–8
–9
–10
INPUT VOLTAGE:V
IN
(V)
© 2001 Microchip Technology Inc.
DS21438A
5
TC59-2 11/5/99
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