For technical support and more information, see inside back cover or visit www.ti.com
Ordering Information
PT5021
o = -3.3 Volts
PT5022
o = -5 Volts
PT5023
o = -9 Volts
PT5024
o = -12 Volts
PT5025
o = -15 Volts
PT5026
o = -5.2 Volts
PT5027
o = -8.0 Volts
PT5028
o = -6.5 Volts
PT5029
o = -5.5 Volts
PT5030
o = -6.0 Volts
PT5031
o = -1.7 Volts
Pin
Function
1
V
in
2
GND
3
V
out
Standard Application
C
1
= Optional ceramic (1-5F)
C
2
= Required Electrolytic (100F)
Features
Negative Output
Input Voltage Range:
+4.75 to +7 Volts
Laser-Trimmed
Small Footprint
Soft Start
5-Pin Mount Option
(Suffixes L & M)
Description
The PT5020 series of integrated
switching regulators (ISRs) convert a
positive input voltage, typically +5V, to a
negative output voltage for a wide range of
analog and datacom applications.
These Plus to Minus ISRs incorporate
a "Buck-Boost" topology and are packaged
in the 3-pin, single in-line pin (SIP)
package configuration.
NOTE: PT5020 ISRs are not Short-Circuit Protected.
Positive Input/Negative Output
Integrated Switching Regulator
PT5020 Series
Pin-Out Information
SLTS025B
(Revised 12/19/2001)
PT Series Suffix
(PT1234
x
)
Case/Pin
Order
Package
Configuration
Suffix
Code *
Vertical
N
(EAD)
Horizontal
A
(EAA)
SMD
C
(EAC)
Horizontal, 2-pin Tab
M
(EAM)
SMD, 2-Pin Tab
L
(EAL)
* Previously known as package styles 100/110.
(Reference the applicable package code drawing
for the dimensions and PC board layout)
P T 5 0 2 0
3
2
1
C
2
1 0 0 F +
C
1
V
out
COM
COM
+V
in
Specifications
(Unless otherwise stated, T
a
=25C, V
in
=5V, I
o
=I
o
max, C
2
=100F)
PT5020 SERIES
Characteristics
Symbol
Conditions
Min
Typ
Max
Units
Output Current
I
o
Over V
in
range
V
o
= 1.7V to 6.5V
0.25
(1)
--
1.0
V
o
= 9V
0.10
(1)
--
0.60
A
V
o
= 12V
0.10
(1)
--
0.50
V
o
= 15V
0.10
(1)
--
0.30
Input Voltage Range
V
in
Over I
o
range
4.75
--
7
(2)
V
Output Voltage Tolerance
V
o
Over V
in
Range
--
1.5
3
%V
o
T
a
= -20C to SOA limit
(3)
Line Regulation
Reg
line
Over V
in
range
--
0.5
1
%V
o
Load Regulation
Reg
load
I
o
min
I
o
I
o
max
--
0.5
1
%V
o
Efficiency
I
o
=0.5 I
o
max
--
75
--
%
V
o
Ripple (pk-pk)
V
r
20MHz bandwidth
--
2
5
%V
o
Transient Response
t
tr
25% load change
--
500
--
Sec
V
o
over/undershoot
--
3.0
5.0
%V
o
Current Limit
I
lim
--
150
--
%I
o
max
Inrush Current
I
ir
On start up
--
1.0
(3)
--
A
t
ir
--
1.0
--
mSec
Switching Frequency
s
Over I
o
range
V
o
=1.7 to 8V
0.8
1
1.2
MHz
V
o
8 V
500
650
800
kHz
Operating Temperature Range
T
a
--
-20
--
+85
(4)
C
Thermal Resistance
ja
Free Air Convection
--
50
--
C/W
(40-60LFM)
Storage Temperature
T
s
-40
--
+125
C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3
--
500
--
G's
1 msec, Half Sine, mounted to a fixture
Mechanical Vibration
Suffixes N, A, & C
--
5
--
G's
Per Mil-STD-883D, 20-2000 Hz
Suffixes L & M
--
20
--
Weight
Suffixes N, A, & C
--
4.5
--
grams
Suffixes L & M
--
6.5
(5)
--
Notes:
(1) The ISR will operate at no load with reduced specifications.
(2) For applications with input voltages greater than 7 VDC, use the PT78NR100 Series.
(3) The inrush current stated is above the normal input current for the associated output load.
(4) See Safe Operating Area curves or consult the factory for the appropriate derating
(5) The tab pins on the 5-pin mount package types (suffixes L & M) must be soldered. For more information see the applicable package outline drawing.
For technical support and more information, see inside back cover or visit www.ti.com
Typical Characteristics
PT5022 (-5VDC)
(See Note A)
Efficiency vs Output Current
Ripple Voltage vs Output Current
Power Dissipation vs Output Current
PT5024 (-12VDC)
(See Note A)
Efficiency vs Output Current
Ripple Voltage vs Output Current
Power Dissipation vs Output Current
Safe Operating Area (V
IN
=5V)
(See Note B)
Safe Operating Area (V
IN
=5V)
(See Note B)
Efficiency - %
Ripple-(mV)
PD-(W
atts)
Iout-(Amps)
Iout-(Amps)
PD-(W
atts)
4 0
5 0
6 0
7 0
8 0
9 0
10 0
0
0 .1
0 .2
0 .3
0 .4
0 .5
7.0V
6.5V
6.0V
5.5V
5.0V
4.75V
Vin
Ripple-(mV)
Iout-(Amps)
Iout-(Amps)
Ambient T
emperature - (C)
Ambient T
emperature - (C)
Maximum Output Current - (Amps)
Maximum Output Current - (Amps)
Iout-(Amps)
Iout-(Amps)
0
0.5
1
1.5
2
0
0.1
0.2
0.3
0.4
0.5
4.75V
5.0V
5.5V
6.0V
6.5V
7.0V
Vin
0
2 0
4 0
6 0
8 0
10 0
12 0
14 0
16 0
0
0.1
0.2
0.3
0.4
0.5
4 .7 5 V
5 .0 V
5 .5 V
6 .0 V
6 .5 V
7 .0 V
V in
4 0
5 0
6 0
7 0
8 0
9 0
1 0 0
0
0 .2
0 .4
0 .6
0 .8
1
7 .0 V
6 .5 V
6 .0 V
5 .5 V
5 .0 V
4 .7 5 V
V in
0
0.5
1
1.5
2
2.5
0
0.2
0.4
0.6
0.8
1
4 .7 5V
5 .0 V
5 .5 V
6 .0 V
6 .5 V
7 .0 V
Vin
0
2 0
4 0
6 0
8 0
1 0 0
0
0 .2
0 .4
0 .6
0 .8
1
4 .7 5V
5 .0 V
5 .5 V
6 .0 V
6 .5 V
7 .0 V
V in
Efficiency - %
20
30
40
50
60
70
80
90
0
0.2
0.4
0.6
0.8
1
0 LFM
60 LFM
90 LFM
Airflow
20
30
40
50
60
70
80
90
0 .0
0 .1
0 .2
0 .3
0 .4
0 .5
90 LFM
60 LFM
0 LFM
A i rfl o w
Positive Input/Negative Output
Integrated Switching Regulator
PT5020 Series
Note A:
Characteristic data has been developed from actual products tested at 25C. This data is considered typical data for the Converter.
Note B:
Thermal derating graphs are developed in free-air convection cooling, which corresponds to approximately 4060LFM of airflow.
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