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
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.
• Laser-Trimmed
• Small Footprint
• Soft Start
These Plus to Minus ISRs incorporate
a “Buck-Boost” topology and are packaged
in the 3-pin, single in-line pin (SIP)
package configuration.
• 5-Pin Mount Option
(Suffixes L & M)
Pin-Out Information Ordering Information PT Series Suffix
(PT1234x)
PT 5021 o = -3.3 Volts
PT 5022 o = -5 Volts
PT 5023 o = -9 Volts
PT 5024 o = -12 Volts
PT 5025 o = -15 Volts
PT 5026 o = -5.2 Volts
PT 5027 o = -8.0 Volts
PT 5028 o = -6.5 Volts
PT 5029 o = -5.5 Volts
PT 5030 o = -6.0 Volts
PT 5031 o = -1.7 Volts
Pin
1
Function
Vin
Case/Pin
O rder
Package
Configuration
Suffix
Code
*
Standard Application
Vertical
Horizontal
SMD
Horizontal, 2-pin Tab
SMD, 2-Pin Tab
N
A
C
M
L
(EAD)
2
GND
Vout
(EAA)
(EAC)
+Vin
–Vout
1
3
3
PT5020
2
(EAM)
(EAL)
C2
100µF
C 1
+
* Previously known as package styles 100/110.
COM
COM
(Reference the applicable package code drawing
for the dimensions and PC board layout)
C1 = Optional ceramic (1-5µF)
C2 = Required Electrolytic (100µF)
NOTE: PT5020 ISRs are not Short-Circuit Protected.
Specifications (Unless otherwise stated, Ta =25°C, Vin =5V, Io =Iomax, C2 =100µF)
PT5020 SERIES
Characteristics
Symbol
Conditions
Min
Typ
Max
Units
(1)
(1)
(1)
(1)
Output Current
Io
Over Vin range
Vo= –1.7V to –6.5V
Vo= –9V
0.25
0.10
0.10
0.10
—
—
—
—
1.0
0.60
0.50
0.30
A
Vo= –12V
Vo= –15V
(2)
Input Voltage Range
Vin
Over Io range
4.75
—
7
V
Output Voltage Tolerance
∆Vo
Over Vin Range
—
1.5
3
%Vo
(3)
Ta = -20°C to SOA limit
Line Regulation
Load Regulation
Efficiency
Regline
Regload
η
Over Vin range
—
—
—
—
0.5
0.5
75
1
1
%Vo
%Vo
%
Iomin ≤ Io ≤ Iomax
Io =0.5 Iomax
—
5
Vo Ripple (pk-pk)
Transient Response
Vr
20MHz bandwidth
2
%Vo
ttr
25% load change
—
—
500
3.0
—
µSec
%Vo
Vo over/undershoot
5.0
Current Limit
Inrush Current
Ilim
—
150
—
%Iomax
(3)
Iir
tir
On start up
Over Io range
—
—
—
1.0
1.0
—
—
A
mSec
Switching Frequency
ƒs
V
o
=1.7 to 8V
0.8
1
1.2
MHz
kHz
V
o
≥8 V
500
650
800
Operating Temperature Range
Thermal Resistance
Ta
-20
—
—
50
+85 (4)
°C
θja
Free Air Convection
(40-60LFM)
—
°C/W
Storage Temperature
Mechanical Shock
Ts
-40
—
—
+125
—
°C
Per Mil-STD-883D, Method 2002.3
500
G’s
1 msec, Half Sine, mounted to a fixture
Mechanical Vibration
Suffixes N, A, & C
Suffixes L & M
—
—
5
—
—
G’s
Per Mil-STD-883D, 20-2000 Hz
20
Weight
Suffixes N, A, & C
Suffixes L & M
—
—
4.5
6.5
—
—
grams
(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