24
For assistance or to order, call
(800) 531-5782
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
Standard Application
C
1
= Optional electrolytic (100F)
C
2
= Required 100F electrolytic (No tantalum)
See capacitor application note on page 43.
3 AMP HIGH-PERFORMANCE
ADJUSTABLE ISR
P T 6 3 0 5
S e r i e s
Specifications
Characteristics
PT6305 SERIES
(T
A
=25C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
I
o
4.5
V
in
V
in
MAX
0.3
--
3.0**
ADC
Current Limit
I
cl
V
in
= +5V
--
3.6
5.0
ADC
Short Circuit Current
I
sc
V
in
= +5V
--
5.0
--
Apk
Input Voltage Range
V
in
0.3A
I
o
3.0A
PT6305N
4.5
--
9
VDC
PT6306N
4.5
--
9
VDC
PT6307N
4.5
--
9
VDC
PT6308N
4.5
--
6.0
VDC
Static Voltage Tolerance
V
o
V
in
= +5V, I
o
= 3.0A
PT6305N
3.2
3.3
3.4
VDC
0C
T
a
+70C
PT6306N
1.7
1.8
1.9
VDC
PT6307N
2.0
2.1
2.2
VDC
PT6308N
1.1
1.2
1.3
VDC
Line Regulation
Reg
line
4.5V
V
in
5.5V, I
o
= 3.0A
--
25
50
mV
Load Regulation
Reg
load
V
in
= +5V, 0.3
I
o
3.0A --
25
50
mV
V
o
Ripple/Noise pk-pk
V
n
V
in
= 5V, I
o
= 3.0A
--
66
--
mV
Transient Response
t
tr
I
o
step between 1.5A and 3.0A
--
200
--
Sec
with C
2
= 100F
V
os
V
o
over/undershoot
--
200
--
mV
Efficiency
V
in
= +5V, I
o
= 1.5A
PT6305N
--
85
--
%
PT6306N
--
74
--
%
PT6307N
--
77
--
%
PT6308N
--
63
--
%
V
in
= +5V, I
o
= 3.0A
PT6305N
--
80
--
%
PT6306N
--
68
--
%
PT6307N
--
72
--
%
PT6308N
--
57
--
%
Switching Frequency
o
4.5
V
in
V
in
MAX
500
650
800
KHz
0.3A
I
o
3.0A
Operating Temperature
T
a
Free Air Convection (40-60 LFM)
0
--
+70*
C
Over V
in and
I
o
Ranges
Thermal Resistance
ja
Free Air Convection (40-60 LFM)
--
25
--
C/W
Storage Temperature
T
s
--
-40
--
+125
C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3 Condition A, 1 msec, Half Sine,
--
--
500
G's
mounted to a fixture
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2 Condition A, 20-2000 Hz
--
--
15
G's
Weight
--
--
--
11.2
--
grams
Relative Humidity
--
Non-condensing
0
--
95
%
*See Thermal Derating chart. **The PT6305 Series can be easily paralleled to provide output current in multiples of 3 amps. Please contact a Power Trends' Application Engineer for the
appropriate application note. Note: The PT6305 Series requires a 100F electrolytic capacitor for proper operation in all applications.
V
IN
(+)
COM
PT6305,6,7,8
5,6,7,8
9,10,11
COM
V
OUT
(+)
C1
C2
V
O
Adjust
2,3,4
12
Ordering Information
PT6305
n = +3.3 Volts
PT6306
n = +1.8 Volts
PT6307
n = +2.1 Volts
PT6308
n = +1.2 Volts
(For dimensions, see page 66.)
Pin-Out Information
Pin No. Function
1
N/C
2
V
in
3
V
in
4
V
in
5
GND
6
GND
Pin No. Function
7
GND
8
GND
9
V
out
10
V
out
11
V
out
12
Adjust
(See page 40.)
Single-Device 5V to 3V Power
85% Efficiency
Small SIP Footprint:
0.36" x 2.00" x 0.60"(H)
Wide Input Voltage Range:
+4.5V to +9.0V
Internal Short Circuit Protection
Over-Temperature Protection
The PT6305N is Power Trends'
new high performance +5V to +3.3V, 3
Amp, 12-Pin SIP (Single In-line-
Package) Integrated Switching
Regulator (ISR). This high-perfor-
mance ISR allows easy integration of
low-power 3.3V logic IC's into existing
5V systems without redesigning the
central power supply. Only one external
capacitor is required for proper
operation. The PT6306,7,8 can be used
to power high-speed data buses (+2.1V),
or the new GTL (+1.2V) logic buses.
PT Series Suffix
(PT1234
X
)
Case/Pin
Heat Tab Configuration
Configuration
None
Side
Vertical Through-Hole
N
R
Horizontal Through-Hole
A
G
Horizontal Surface Mount
C
B
(See Thermal Application Notes on page 44 for heat tab
application data.)
1
2
1
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
For assistance or to order, call
(800) 531-5782
25
DATA SHEETS
High-Performance ISRs
PT6305, 3.3 VDC
(See Note 1)
PT6307, 2.1 VDC
(See Note 1)
PT6308, 1.2 VDC
(See Note 1)
Efficiency vs Output Current
Efficiency vs Output Current
Efficiency vs Output Current
Ripple vs Output Current
Ripple vs Output Current
Ripple vs Output Current
Minimum Input Voltage
(See Note 2)
Minimum Input Voltage
(See Note 2)
Minimum Input Voltage
(See Note 2)
Thermal Derating (T
a
)
(See Note 3)
Thermal Derating (T
a
)
(See Note 3)
Power Dissipation vs Output Current
Power Dissipation vs Output Current
Power Dissipation vs Output Current
Note 1:
All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25C. This data is considered typical data for the ISR.
Note 2:
Minimum V
in
data is typical and is not guaranteed. The data corresponds to a 2% output voltage drop.
Note 3:
Thermal derating graphs are developed in free air convection cooling of 40-60 LFM with no optional heat tab soldered in a printed circuit board. (See Thermal Application Notes).
Iout-(Amps)
V
in-(V
olts)
3.5
3.75
4
4.25
4.5
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
V
in-(V
olts)
3.5
3.75
4
4.25
4.5
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
3.5
3.7
3.9
4.1
4.3
4.5
0
0.5
1
1.5
2
2.5
3
Vin-(Volts)
Iout-(Amps)
0
0.5
1
1.5
2
2.5
3
4.5
5
5.5
6
85
C
90
C
Vin-(Volts)
Iout-(Amps)
0
0.5
1
1.5
2
2.5
3
4.5
6.5
8.5
10.5
85
C
90
C
95
C
Vin-(Volts)
0
0.5
1
1.5
2
2.5
3
4.5
6.5
8.5
10.5
70
C
85
C
90
C
95
C
Iout-(Amps)
Pd-(W
atts)
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
9.0V
8.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
9.0V
8.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
Efficiency - %
40
50
60
70
80
90
100
0
0.5
1
1.5
2
2.5
3
4.5V
5.0V
5.5V
8.0V
9.0V
Vin
Iout-(Amps)
40
50
60
70
80
90
100
0
0.5
1
1.5
2
2.5
3
4.5V
5.0V
5.5V
8.0V
9.0V
Vin
Iout-(Amps)
Ripple-(mV)
0
20
40
60
80
100
0
0.5
1
1.5
2
2.5
3
9.0V
8.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
0
20
40
60
80
100
0
0.5
1
1.5
2
2.5
3
9.0V
8.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
Efficiency - %
40
50
60
70
80
90
100
0
0.5
1
1.5
2
2.5
3
4.5V
5.0V
5.5V
6.0V
Vin
Iout-(Amps)
Ripple (mv)
0
20
40
60
80
100
0
0.5
1
1.5
2
2.5
3
6.0V
5.5V
5.0V
4.5V
Vin
Iout-(Amps)
Pd-(W
atts)
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
6.0V
5.5V
5.0V
4.5V
Vin
V
in-(V
olts)
Iout-(Amps)
Pd-(W
atts)
Efficiency - %
Ripple-(mV)
C H A R A C T E R I S T I C D A T A
Thermal Derating (T
a
)
(See Note 3)
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