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2 AMP ADJUSTABLE POSITIVE STEP-DOWN
INTEGRATED SWITCHING REGULATOR
P T 6 3 1 0
87% Efficiency
Adjustable Output Voltage
Internal Short Circuit Protection
Over-Temperature Protection
On/Off Control (Ground Off)
Small SIP Footprint
Wide Input Range
The PT6310 series is a High-
Performance 2 Amp, 12-Pin SIP
(Single In-line Package) Integrated
Switching Regulator (ISR) designed to
meet the on-board power conversion
needs of battery powered or other equip-
ment requiring high efficiency and
small size. This high performance ISR
offers a unique combination of features
combining 87% typical efficiency with
open-collector on/off control and ad-
justable output voltage.
Quiescent current in the shutdown
mode is typically less than 100A.
Standard Application
C
1
= Optional 1F ceramic
C
2
= Required 100F electrolytic
Q
1
= NFET
Ordering Information
PT6310! = +14.6 Volts
PT6311! = +15.5 Volts
PT6312! = +15.0 Volts
PT6313! = +8.0 Volts
Pin-Out Information
Pin
Function
1
Inhibit
(30V max)
2
V
in
3
V
in
4
V
in
5
GND
6
GND
7
GND
8
GND
9
V
out
10
V
out
11
V
out
12
V
out
Adj
PT Series Suffix
(PT1234
X
)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole
A
Horizontal Surface Mount
C
PT6300
2,3,4
5,6,7,8
9,10,11
12
V
IN
COM
COM
V
OUT
C2
+
1
V
O
ADJ
INH
Q1
C1
Specifications
Characteristics
PT6310 Series
(T
a
= 25
C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
I
o
Over V
in
range
0.1*
--
2.0
A
Short Circuit Current
I
sc
V
in
= V
o
+
5V
--
5.0
--
Apk
Input Voltage Range
V
in
0.1
I
o
2.0 A
V
o
+
4
--
38**
V
Output Voltage Tolerance
V
o
Over V
in
Range, I
o
= 2.0 A
--
1.0
2.0
%V
o
T
a
= 0C to +60C
Line Regulation
Reg
line
Over V
in
range
--
0.25
0.5
%V
o
Load Regulation
Reg
load
0.1
I
o
2.0 A
--
0.25
0.5
%V
o
V
o
Ripple/Noise
V
n
V
in
= V
in
min, I
o
= 2.0A
--
2
--
%V
o
Transient Response
t
tr
50% load change
--
100
200
Sec
with C
o
= 100F
V
os
V
o
over/undershoot
--
5.0
--
%V
o
Efficiency
V
in
=24V, I
o
= 2.0 A
--
87
--
%
Switching Frequency
o
Over V
in
and I
o
ranges
600
700
800
kHz
PT6312 only
500
550
600
kHz
Shutdown Current
I
sc
V
in
= 15V
--
100
--
A
Quiescent Current
I
nl
I
o
= 0A, V
in
=10V
--
10
--
mA
Output Voltage
V
o
Below V
o
See Application Notes.
Adjustment Range
Above V
o
Absolute Maximum
T
a
-40
--
+85
C
Operating Temperature Range
Recommendated Operating
T
a
Free Air Convection, (40-60LFM)
-40
--
+70
C
Temperature Range
At V
in
= 18V, I
o
= 2.0A
Thermal Resistance
ja
Free Air Convection (40-60LFM)
--
30
--
C/W
Storage Temperature
T
s
--
-40
--
+125
C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3, 1 msec,
--
500
--
G's
Half Sine, mounted to a fixture
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz,Soldered in a PC board
--
10
--
G's
Weight
--
--
--
6.5
--
grams
* ISR will operate to no load with reduced specifications.
** Input voltage cannot exceed 30V when the inhibit function is used.
Note: The PT6310 requires a 100F electrolytic or tantalum output capacitor for proper operation in all applications.
Pkg Style 200
S e r i e s
SLTS076
(Revised 8/17/99)
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Copyright
2000, Texas Instruments Incorporated
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