鈥?/div>
Single-Device 5V to 3V Power
85% Efficiency
Small SIP Footprint
Adjustable Output Voltage
Application Notes
Mechanical Outline
Product Selector Guide
Revised 5/15/98
The PT6400 is a high performance
+5V to +3.3V, 3 Amp, 12-Pin SIP (Single
In-line Package) Integrated Switching
Regulator (ISR) designed for stand alone
(not parallelable) operation. This high-
performance ISR allows easy integration
of low-power 3.3V logic IC鈥檚 into existing
5V systems without redesigning the central
power supply. Only two external capacitors
are required for proper operation. The
output voltage is easily adjustable with one
external resistor. The PT6406,7,8 can be
used to terminate high-speed data buses
such as Futurebus (+2.1V) or the new GTL
(+1.2V) logic buses.
Please note that this product does not
include short circuit protection.
Pin-Out Information
Pin Function
1
2
Do not connect
Ordering Information
PT6404簍
PT6405簍
PT6406簍
PT6407簍
PT6408簍
PT6409簍
= +1.5 Volts
= +3.3 Volts
= +1.8 Volts
= +2.1 Volts
= +1.2 Volts
= +2.5 Volts
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
V
in
V
in
V
in
GND
GND
GND
GND
V
out
V
out
V
out
V
out
Adjust
Standard Application
V
IN
2,3,4
3
4
V
OUT
P
D
E
PT6400
5,6,7,8
12
9,10,11
5
6
7
R1
(V
O
UP)
C1
100碌F
COM
+
C2
100碌F
R2
(V
O
DOWN)
+
COM
8
9
10
11
12
Pkg Style 300
PT6400
Note: Back surface
of product is
conducting metal.
C
1
= Required 100碌F electrolytic
C
2
= Required 100碌F electrolytic
Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
Current Limit
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
V
o
Ripple/Noise
Transient Response
with C
2
= 100碌F
Efficiency
PT6400 SERIES
Symbols
I
o
I
cl
V
in
鈭哣
o
Reg
line
Reg
load
V
n
t
tr
V
os
畏
Conditions
4.5V
鈮?/div>
V
in
鈮?/div>
5.5V
V
in
= +5V
0.1A
鈮?/div>
I
o
鈮?/div>
3.0A
V
in
= +5V, I
o
= 3.0A
0擄C
鈮?/div>
T
a
鈮?/div>
+70擄C
4.5V
鈮?/div>
V
in
鈮?/div>
5.5V, I
o
= 3.0A
V
in
= +5V, 0.3
鈮?/div>
I
o
鈮?/div>
3.0A
V
in
= 5V, I
o
= 3.0A
I
o
step between 1.5A and 3.0A
V
o
over/undershoot
V
in
= +5V, I
o
= 1.5A
V
o
= 3.3V
V
o
= 1.8V
V
o
= 2.1V
V
o
= 1.2V
Min
0.1*
鈥?/div>
4.5
V
o
-0.05
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
500
0
Free Air Convection (40-60 LFM)
At V
in
= 5V, I
o
=2.5A
Free Air Convection (40-60 LFM)
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>
0
鈥?/div>
-40
鈥?/div>
鈥?/div>
鈥?/div>
Typ
鈥?/div>
3.6
鈥?/div>
鈥?/div>
鹵10
鹵10
66
200
200
85
74
77
63
650
鈥?/div>
鈥?/div>
25
鈥?/div>
500
15
6.5
Max
3.0
5.0
5.5
V
o
+0.05
鹵25
鹵25
165
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
800
+85
+ 70**
鈥?/div>
+125
鈥?/div>
鈥?/div>
鈥?/div>
Units
A
A
V
V
mV
mV
mV
碌Sec
mV
%
%
%
%
kHz
擄C
擄C
擄C/W
擄C
G鈥檚
G鈥檚
grams
Switching Frequency
Absolute Maximum
Operating Temperature Range
Recommended Operating
Temperature Range
Thermal Resistance
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
茠
o
T
a
T
a
4.5V
鈮?/div>
V
in
鈮?/div>
5.5V
0.3A
鈮?/div>
I
o
鈮?/div>
3.0A
胃
ja
T
s
鈥?/div>
*ISR will operate down to no load with reduced specifications
**See Thermal Derating chart.
Note:
The PT6400 Series requires two 100碌F electrolytic or tantalum capacitors for proper operation in all applications.
24
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
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