ETC PT5031

PT5020 Series
Positive Input/Negative Output
Integrated Switching Regulator
SLTS025B
(Revised 12/19/2001)
Features
Description
• Negative Output
• Input Voltage Range:
+4.75 to +7 Volts
• Laser-Trimmed
• Small Footprint
• Soft Start
• 5-Pin Mount Option
(Suffixes L & M)
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.
Pin-Out Information
Pin
1
Standard Application
+V in
1
PT5020
–V out
3
2
C1
Function
Vin
2
GND
3
Vout
C2
100µF +
COM
COM
C1 = Optional ceramic (1-5µF)
C2 = Required Electrolytic (100µF)
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
PT Series Suffix (PT1234x )
Case/Pin
Configuration
Vertical
Horizontal
SMD
Horizontal, 2-pin Tab
SMD, 2-Pin Tab
Order
Suffix
Package
Code *
N
A
C
M
L
(EAD)
(EAA)
(EAC)
(EAM)
(EAL)
* Previously known as package styles 100/110.
(Reference the applicable package code drawing
for the dimensions and PC board layout)
NOTE: PT5020 ISRs are not Short-Circuit Protected.
Specifications
(Unless otherwise stated, T a =25°C, Vin =5V, I o =Iomax, C2 =100µF)
PT5020 SERIES
Characteristics
Output Current
Symbol
Io
Conditions
Over Vin range
Min
Vo= –1.7V to –6.5V
Vo= –9V
Vo= –12V
Vo= –15V
Typ
Max
Units
0.25 (1)
0.10 (1)
0.10 (1)
0.10 (1)
—
—
—
—
1.0
0.60
0.50
0.30
A
4.75
—
7 (2)
V
Input Voltage Range
Vin
Over Io range
Output Voltage Tolerance
∆Vo
Over Vin Range
Ta = -20°C to SOA limit (3)
—
±1.5
±3
%Vo
Line Regulation
Regline
Over Vin range
—
±0.5
±1
%Vo
Load Regulation
Regload
Iomin ≤ Io ≤ Iomax
—
±0.5
±1
%Vo
Efficiency
η
Io =0.5 Iomax
—
75
—
%
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
—
±2
±5
%Vo
Transient Response
ttr
25% load change
Vo over/undershoot
—
—
500
3.0
—
5.0
µSec
%Vo
Current Limit
Ilim
—
150
—
%Iomax
Inrush Current
Iir
tir
On start up
—
—
1.0 (3)
1.0
—
—
A
mSec
Switching Frequency
ƒs
Over Io range
0.8
500
1
650
1.2
800
MHz
kHz
Operating Temperature Range
Ta
—
-20
—
+85 (4)
°C
Thermal Resistance
θja
Free Air Convection
(40-60LFM)
—
50
—
°C/W
Storage Temperature
Ts
-40
—
+125
°C
Vo =1.7 to 8V
Vo ≥8 V
Mechanical Shock
Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
—
500
—
G’s
Mechanical Vibration
Per Mil-STD-883D, 20-2000 Hz
Suffixes N, A, & C
Suffixes L & M
—
—
5
20
—
—
G’s
Weight
Suffixes N, A, & C
Suffixes L & M
—
—
4.5
6.5 (5)
—
—
grams
Notes: (1)
(2)
(3)
(4)
(5)
The ISR will operate at no load with reduced specifications.
For applications with input voltages greater than 7 VDC, use the PT78NR100 Series.
The inrush current stated is above the normal input current for the associated output load.
See Safe Operating Area curves or consult the factory for the appropriate derating
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
PT5020 Series
Positive Input/Negative Output
Integrated Switching Regulator
PT5024 (-12VDC)
PT5022 (-5VDC)
(See Note A)
Efficiency vs Output Current
Efficiency vs Output Current
100
10 0
90
90
Vin
Efficiency - %
Efficiency - %
(See Note A)
7.0V
6.5V
6.0V
5.5V
5.0V
4.75V
80
70
60
V in
80
7.0 V
6.5 V
6.0 V
5.5 V
5.0 V
4.7 5V
70
60
50
50
40
40
0
0 .1
0 .2
0 .3
0 .4
0 .5
0
0 .2
Iout-(Amps)
0 .4
0 .6
0 .8
1
Iout-(Amps)
Ripple Voltage vs Output Current
Ripple Voltage vs Output Current
10 0
160
140
V in
4 .7 5 V
5 .0 V
5 .5 V
6 .0 V
6 .5 V
7 .0 V
100
80
60
Ripple-(mV)
Ripple-(mV)
80
120
40
Vin
4 .7 5V
5 .0 V
5 .5 V
6 .0 V
6 .5 V
7 .0 V
60
40
20
20
0
0
0
0.1
0.2
0.3
0.4
0
0.5
0.2
Iout-(Amps)
Power Dissipation vs Output Current
0.6
0.8
1
Power Dissipation vs Output Current
2
2.5
1.5
2
Vin
4.75V
5.0V
5.5V
6.0V
6.5V
7.0V
1
PD-(Watts)
PD-(Watts)
0.4
Iout-(Amps)
Vin
4.75V
5.0V
5.5V
6.0V
6.5V
7.0V
1.5
1
0.5
0.5
0
0
0
0.1
0.2
0.3
0.4
0.5
0
0.2
Iout-(Amps)
Safe Operating Area (VIN=5V) (See Note B)
0.6
0.8
1
Safe Operating Area (VIN=5V) (See Note B)
90
90
80
80
70
60
A i rfl o w
50
90 LFM
60 LFM
40
0 LFM
30
Ambient Temperature - (C°)
Ambient Temperature - (C°)
0.4
Iout-(Amps)
70
Airflow
60
0 LFM
50
60 LFM
40
90 LFM
30
20
20
0 .0
0 .1
0 .2
0 .3
Maximum Output Current - (Amps)
0 .4
0 .5
0
0.2
0.4
0.6
0.8
1
Maximum Output Current - (Amps)
Note A: Characteristic data has been developed from actual products tested at 25°C. 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 40–60LFM of airflow.
For technical support and more information, see inside back cover or visit www.ti.com
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