鈥?/div>
Solderable Copper Case
Description
The PT5071 is a 1.5-ampere rated step-up/
step-down Integrated Switching Regulator
(ISR) that provides a tightly regulated 12V
output voltage from a 7V to 16V variable
input source. This high-performance ISR has
applications in systems where the input
voltage straddles the desired 12V output.
The regulator has an adjustable output
voltage and input start-up threshold, and a
standby function for power conservation.
Pin-Out Information
Pin Function
Ordering Information
PT5071簍
= +12 Volts
Standard Application
U V
ADJ
V
IN
2
UVadj
4-6
V
IN
STBY*
3
1
2
3
4
V
OUT
V
0
adj
14
11-13
N/C
UVLO Adj
STBY*
V
in
V
in
V
in
GND
GND
GND
GND
V
out
V
out
V
out
V
out
Adjust
For Inhibit pin:
Open = output enabled
Ground = output disabled
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
V
OUT
5
6
7
8
9
10
11
12
13
14
PT5071
GND
7-10
N
A
C
+
+
C
1
STBY
GND
C
1
, C
2
= Required 100碌F electrolytic (See footnotes)
C
2
(For dimensions and PC board layout,
see Package Styles 1360 and 1370.)
GND
Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
Current Limit
Input Voltage Range
Output Voltage T
olerance
Output Voltage Adjust Range
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
with C
2
= 100碌F
Efficiency
Switching Frequency
Absolute Maximum
Operating T
emperature Range
Storage T
emperature
Mechanical Shock
Mechanical Vibration
Weight
鈥?/div>
Symbols
I
o
I
lim
V
in
鈭哣
o
V
o
adj
Reg
line
Reg
load
V
n
t
tr
V
os
畏
茠
o
T
a
T
s
Conditions
Over V
in
Range
V
in
= 12V
0.1A
鈮?/div>
I
o
鈮?/div>
I
o
max
V
in
=12V, I
o
=I
o
max
鈥?0擄C
鈮?/div>
T
a
鈮?/div>
+85擄C
Over V
in
Range, I
o
=I
o
max
V
in
=12V, 0.1
鈮?/div>
I
o
鈮?/div>
I
o
max
V
in
=12V, I
o
=I
o
max
Load step from 50% to 100% I
o
max, V
in
=12V
V
o
over/undershoot
V
in
=12V, V
o
=12V, I
o
=1.5A
Over V
in
Range
0.1A
鈮?/div>
I
o
鈮?/div>
I
o
max
Over V
in
range
鈥?/div>
Per Mil-STD-883D, Method 2002.3 , 1 msec,
Half Sine, mounted to a fixture
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, Soldered in a PC board
鈥?/div>
Min
0.1
(1)
鈥?/div>
7.0
PT5071
Typ
鈥?/div>
4.0
鈥?/div>
鹵1.0
鈥?/div>
鹵0.5
鹵0.5
鹵2.0
200
1.0
83
550
鈥?/div>
鈥?/div>
TBD
TBD
25
Max
1.5
16.0
Units
A
A
V
%
V
%
%
%
碌Sec
%V
o
%
kHz
擄C
擄C
G鈥檚
G鈥檚
grams
10
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?0
(2)
鈥?0
鈥?/div>
鈥?/div>
鈥?/div>
15
鹵3.0
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
+85
(3)
+125
鈥?/div>
鈥?/div>
鈥?/div>
Notes:
1. The regulator will operate down to no load with reduced specifications.
2. For operating temperatures below 0擄C, it is recommended that tantalum capacitors be used at both the input and output.
3. See SOA curves, or contact the factory for derating guidelines.
Input/Output Capacitors:
The PT5071 regulator requires a 100碌F electrolytic capacitor at the input and output for proper operation in all applications. The ESR
(equivalent series resistance) of both capacitors must be less than 250m
鈩?/div>
@100kHz. In addition, C
1
and C
2
must be rated to a minimum of 300mArms ripple current.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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