For STBY* pin; open = output enabled; ground = output
disabled.
Specifications
Characteristics
(T
a
= 25°C unless noted)
Output Current
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
V
o
Ripple/Noise
Transient Response
with C
out
= 1200µF
Efficiency
PT7705 SERIES
Symbols
I
o
V
in
∆V
o
Reg
line
Reg
load
V
n
t
tr
V
os
η
Conditions
T
a
= +60°C, 200 LFM, pkg N
T
a
= +25°C, natural convection
0.1A
≤
I
o
≤
15A
V
in
= +5V, I
o
= 15A
0°C
≤
T
a
≤
+65°C
4.5V
≤
V
in
≤
5.5V, I
o
= 15A
V
in
= +5V, 0.1
≤
I
o
≤
15A
V
in
= +5V, I
o
= 15A
I
o
step between 7.5A and 15A
V
o
over/undershoot
V
in
= +5V, I
o
= 10A
V
o
V
o
V
o
V
o
V
o
= 3.3V
= 2.9V
= 2.5V
= 1.8V
= 1.5V
Min
0.1
*
0.1
*
4.5
***
V
o
-0.03
—
—
—
—
—
—
—
—
—
—
650
0
0
-40
—
—
—
Typ
—
—
—
—
±10
±10
50
100
200
89
87
85
79
77
700
—
—
—
500
10
31/41
Max
18
**
15
**
5.5
V
o
+0.03
—
—
—
—
—
—
—
—
—
—
750
+85
+65****
+125
—
—
—
Units
A
A
V
V
mV
mV
mV
µSec
mV
%
%
%
%
%
kHz
°C
°C
°C
G’s
G’s
grams
Switching Frequency
Absolute Maximum
Operating Temperature Range
Recommended Operating
Temperature Range
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
ƒ
o
T
a
T
a
T
s
4.5V
≤
V
in
≤
5.5V
0.1A
≤
I
o
≤
15A
—
Forced Air Flow = 200 LFM
Over V
in and
I
o
Ranges
—
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
—
Vertical/Horizontal
* ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.
**The PT7705 series can be easily paralleled with one or more of the PT7749 Current Boosters to provide increased output current in increments of 18A.
*** The minimum input voltage is 4.5V or V
out
+1.2V, whichever is greater.
****See SOA curves.
Output Capacitors:
The PT7705 series requires a minimum ouput capacitance of 1200µF for proper operation. Do not use Oscon type capacitors. The maximum
allowable output capacitance is 15,000µF. See Capacitor Application Note.
Input Filter:
An input filter is optional for most applications. The input inductor must be sized to handle 15ADC with a typical value of 1µH. The input capacitance must be
rated for a minimum of 1.3Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required.
38
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
For assistance or to order, call
(800) 531-5782
PT7705
Features
•
Single-Device: +5V input
•
5-bit Programmable:
1.3V to 3.5V@18A
•
High Efficiency
•
Input Voltage Range:
4.5V to 5.5V
•
Differential Remote Sense
•
27-pin SIP Package
•
Parallelable with PT7749
18A “Current Boosters”
Series
Programming Information
VID3 VID2 VID1 VID0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Ordering Information
PT7705t
= 1.3 to 3.5 Volts
t
(For dimensions and PC board layout,
see Package Styles 800 and 810.)
1.30V
1.35V
1.40V
1.45V
1.50V
1.55V
1.60V
1.65V
1.70V
1.75V
1.80V
1.85V
1.90V
1.95V
2.00V
2.05V
VID4=1 VID4=0
Vout
Vout
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
5V5V Bus Converters
to 3.x Products
DATA SHEETS
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
N
A
C
Logic 0 = Pin 12 potential (remote sense gnd)
Logic 1 = Open circuit (no pull-up resistors)
VID3 and VID4 may not be changed while the unit is operating.
C H A R A C T E R I S T I C
PT7705, V
o
= 3.3 VDC
(See Note 1)
D A T A
(See Note 1)
PT7705, V
o
= 3.3 VDC
Efficiency vs Output Current
100
Safe Operating Area Curves (@V
in
=+5V)
PKG SUFFIX N
Ambient Temperature (°C)
Efficiency - %
90
80
70
60
50
40
30
20
0
2
4
6
8
10
12
14
16
18
90
80
Vin
4.5V
5.0V
Recommended Maximum
Operating Temperature
Airflow
Nat Conv
60LFM
100LFM
200LFM
70
60
5.5V
50
40
0
3
6
9
12
15
18
Iout-(Amps)
Output Current (Amps)
60
Ripple vs Output Current
PKG SUFFIX A, C
90
50
40
Vin
5.5V
Ambient Temperature (°C)
80
70
60
50
40
30
20
0
2
4
6
8
10
12
14
16
18
Ripple-(mV)
30
5.0V
4.5V
Recommended Maximum
Operating Temperature
Airflow
Nat Conv
60LFM
100LFM
200LFM
20
10
0
0
3
6
9
12
15
18
Iout-(Amps)
Power Dissipation vs Output Current
Output Current (Amps)
14
12
PD-(Watts)
10
8
6
4
2
0
0
3
6
9
12
15
18
Vin
5.5V
5.0V
4.5V
Iout-(Amps)
Note 1:
All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
Note 2:
SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://
www.powertrends.com
39
For assistance or to order, call
(800) 531-5782
Application
Notes
PT7705/7707 Series
More Application Notes
Pin-Coded Output Voltage Adjustment on the
“Big Hammer” Series ISRs
The ISRs related to Power Trends’ PT7705 incorporate pin-
coded voltage control to adjust the ouput voltage. The control
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