For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6600 Series
9 Amp 5V/3.3V Input Adjustable
Integrated Switching Regulator
Specifications (continued)
Characteristics
(T
a
= 25°C unless noted)
Storage T
emperature
Mechanical Shock
Mechanical Vibration
Weight
PT6600 SERIES
Symbols
T
s
—
—
—
Conditions
—
Per Mil-STD-883D, Method 2002.3
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
—
Min
-40
—
—
—
Typ
—
500
7.5
14
Max
+125
—
—
—
Units
°C
G’s
G’s
grams
Notes:
(1) The PT6600 series requires two 330µF electrolytic capacitors (input and output) for proper operation in all applications. The input capacitance must be rated for a minimum of
1.1Arms of ripple current. See the application note, PT6500/6600 Series Capacitor Recommendations.
(2)
ISR will operate down to no load with reduced specifications.
(3) For operation below 0°C, use tantalum capacitors for C
IN
and C
OUT
. For more information, contact an Application Specialist.
(4) See Safe Operating Curves, or contact the factory for the appropriate derating.
T Y P I C A L
Safe Operating Area Curves (@ V
in
=+5.0V)
C H A R A C T E R I S T I C S
(See Note B)
PT6601, 3.3 VDC
(See Note A)
PT6601P (Vertical)
90
80
100
Efficiency vs Output Current
90
Ambient Temperature (°C)
Efficiency - %
70
60
50
40
Airflow
300 LFM
150 LFM
60 LFM
Nat Conv
80
Vin
4.5V
70
5.0V
5.5V
60
50
30
20
0
1
2
3
4
5
6
7
8
9
40
0
1
2
3
4
5
6
7
8
9
Output Current (Amps)
Iout-(Amps)
PT6601D (Horizontal)
90
80
30
Ripple vs Output Current
Ambient Temperature (°C)
Airflow
3 00 LF M
1 50 LF M
60 LF M
Na t Co nv.
25
70
60
50
40
30
20
0
1
2
3
4
5
6
7
8
9
20
Ripple-(mV)
Vin
5.5V
15
5.0V
4.5V
10
5
0
Output Current (Amps)
0
1
2
3
4
Iout-(Amps)
5
6
7
8
9
PT6601R (Vertical with Side Tab)
Ambient Temperature (°C)
90
80
70
60
50
40
3
9
8
Power Dissipation vs Output Current
Airflow
3 00 LF M
1 50 LF M
60 LF M
N at C onv
PD-(Watts)
7
Vin
6
5.5V
5
4
5.0V
4.5V
30
20
0
1
2
3
4
5
6
7
8
9
2
1
0
Output Current (Amps)
0
1
2
Iout-(Amps)
3
4
5
6
7
8
9
P
Note A:
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 B:
SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6600 Series
Adjusting the Output Voltage of the
PT6600 5V Bus Converters
The output voltage of the Power Trends PT6600 Series
ISRs may be adjusted higher or lower than the factory
trimmed pre-set voltage with the addition of a single
external resistor. Table 1 accordingly gives the allowable
adjustment range for each model in the series as V
a
(min)
and V
a
(max).
Adjust Up:
An increase in the output voltage is
obtained by adding a resistor R2, between pin 14 (V
o
ad-
just) and pins 7-10 (GND).
Figure 1
1
V
o
(sense)
Vin
4,5,6
V
in
PT6600
STBY
3
GND
7,8,9,10
V
out
11,12,13
Vo
V
o
(adj)
14
+
(R1)
Adj Down
C
out
R2
Adjust
Up
+
C
in
L
O
A
D
COM
COM
Adjust Down:
Add a resistor (R1), between pin 14 (V
o
adjust) and pins 11-13 (V
out
).
Refer to Figure 1 and T
able 2 for both the placement and value
of the required resistor, either
(R1)
or R2 as appropriate.
Notes:
1. Use only a single 1% resistor in either the
(R1)
or R2
location. Place the resistor as close to the ISR as
possible.
2. Never connect capacitors from V
o
adjust to either
GND, V
out
, or the Remote Sense pin. Any
capacitance added to the V
o
adjust pin will affect the
stability of the ISR.
3. If the Remote Sense feature is being used,
connecting the resistor
(R1)
between pin 14 (V
o
adjust) and pin 1 (Remote Sense) can benefit load
regulation.
4. The minimum input voltage required by the part is
V
out
+ 1.2 or 3.1V, whichever is higher.
The values of
(R1)
[adjust down], and R2 [adjust up], can
also be calculated using the following formulae.
R
o
(V
a
– 1.0)
(V
o
– V
a
)
(R1)
=
– R
s
k
Ω
R2
=
R
o
V
a
- V
o
– R
s
k
Ω
Where: V
o
V
a
R
o
R
s
= Original output voltage
= Adjusted output voltage
= The resistance value in T
able 1
= The series resistance from T
able 1
Table 1
PT6600 ADJUSTMENT AND FORMULA PARAMETERS
Series Pt #
Vo (nom)
Va (min)
Va (max)
Ro (kΩ)
Ω
Rs (kΩ)
Ω
PT6605
1.2
1.14
2.35
2.49
2.0
PT6607
1.3
1.19
2.45
2.49
2.0
PT6602
1.5
1.27
2.65
2.49
2.0
PT6608
1.7
1.36
2.85
2.49
2.0
PT6606
1.8
1.4
2.95
2.49
2.0
PT6603
2.5
1.8
3.5
4.99
4.22
PT6601
3.3
2.25
4.2
12.1
12.1
PT6604
3.6
2.5
4.3
10.0
12.1
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
continued
PT6600 Series
Table 2
PT6600 ADJUSTMENT RESISTOR VALUES
Series Pt #
V
o
(nom)
V
a
(req’d)
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
1.55
1.6
1.65
1.7
1.75
1.8
1.85
1.9
1.95
2.0
2.05
2.1
2.15
2.2
2.25
2.3
2.35
2.4
2.45
2.5
2.55
2.6
2.65
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
R1 =
(Blue)
R2 = Black
4/. Vout
>3.8Vdc
requires Vin
>5.0Vdc
!
47.8kΩ
22.9kΩ
14.6kΩ
10.5kΩ
8.0kΩ
6.3kΩ
5.1kΩ
4.2kΩ
3.5kΩ
3.0kΩ
2.5kΩ
2.2kΩ
1.8kΩ
1.6kΩ
1.3kΩ
1.1kΩ
0.9kΩ
0.8kΩ
0.6kΩ
0.5kΩ
0.4kΩ
0.3kΩ
0.2kΩ
47.8kΩ
22.9kΩ
14.6kΩ
10.5kΩ
8.0kΩ
6.3kΩ
4.1kΩ
4.2kΩ
3.5kΩ
3.0kΩ
2.5kΩ
2.2kΩ
1.8kΩ
1.6kΩ
1.3kΩ
1.1kΩ
0.9kΩ
0.8kΩ
0.6kΩ
0.5kΩ
0.4kΩ
0.3kΩ
0.2kΩ
47.8kΩ
22.9kΩ
14.6kΩ
10.5kΩ
8.0kΩ
6.3kΩ
5.1kΩ
4.2kΩ
3.5kΩ
3.0kΩ
2.5kΩ
2.2kΩ
1.8kΩ
1.6kΩ
1.3kΩ
1.1kΩ
0.9kΩ
0.8kΩ
0.6kΩ
0.5kΩ
0.4kΩ
0.3kΩ
0.2kΩ
47.8kΩ
22.9kΩ
14.6kΩ
10.5kΩ
8.0kΩ
6.3kΩ
5.1kΩ
4.2kΩ
3.5kΩ
3.0kΩ
2.5kΩ
2.2kΩ
1.8kΩ
1.6kΩ
1.3kΩ
1.1kΩ
0.9kΩ
0.8kΩ
0.6kΩ
0.5kΩ
0.4kΩ
0.3kΩ
0.2kΩ
47.8kΩ
22.9kΩ
14.6kΩ
10.5kΩ
8.0kΩ
6.3kΩ
5.1kΩ
4.2kΩ
3.5kΩ
3.0kΩ
2.5kΩ
2.2kΩ
1.8kΩ
1.6kΩ
1.3kΩ
1.1kΩ
6.9kΩ
0.8kΩ
0.6kΩ
0.5kΩ
0.4kΩ
0.3kΩ
0.2kΩ
95.6kΩ
45.7kΩ
29.0kΩ
20.7kΩ
15.7kΩ
12.4kΩ
10.0kΩ
8.3kΩ
0.9kΩ
5.8kΩ
4.1kΩ
2.9kΩ
2.0kΩ
1.3kΩ
0.8kΩ
109.0kΩ
48.4kΩ
28.2kΩ
18.2kΩ
12.1kΩ
8.1kΩ
5.2kΩ
3.0kΩ
1.3kΩ
87.9kΩ
37.9kΩ
21.2kΩ
12.9kΩ
7.9kΩ
4.6kΩ
2.2kΩ
PT6605
1.2
(5.5)kΩ
(3.0)kΩ
(10.5)kΩ
(1.7)kΩ
(3.8)kΩ
(8.0)kΩ
(20.4)kΩ
(1.3)kΩ
(2.5)kΩ
(4.2)kΩ
(7.1)kΩ
(12.9)kΩ
(30.4)kΩ
(0.5)kΩ
(1.2)kΩ
(2.2)kΩ
(3.5)kΩ
(5.5)kΩ
(8.8)kΩ
(15.4)kΩ
(35.4)kΩ
(1.5)kΩ
(2.3)kΩ
(3.3)kΩ
(4.4)kΩ
(5.8)kΩ
(7.4)kΩ
(9.5)kΩ
(12.2)kΩ
(15.7)kΩ
(20.7)kΩ
(28.2)kΩ
(40.7)kΩ
(65.6)kΩ
(140.0)kΩ
(2.3)kΩ
(3.6)kΩ
(5.1)kΩ
(6.7)kΩ
(8.5)kΩ
(10.6)kΩ
(12.9)kΩ
(15.6)kΩ
(18.6)kΩ
(22.2)kΩ
(26.4)kΩ
(31.5)kΩ
(37.6)kΩ
(45.4)kΩ
(55.3)kΩ
(68.6)kΩ
(115.0)kΩ
(254.0)kΩ
(1.5)kΩ
(2.7)kΩ
(3.9)kΩ
(5.3)kΩ
(6.8)kΩ
(8.5)kΩ
(10.4)kΩ
(12.6)kΩ
(15.0)kΩ
(17.9)kΩ
(21.2)kΩ
(29.9)kΩ
(42.9)kΩ
(64.6)kΩ
(108.0)kΩ
(238.0)kΩ
PT6607
1.3
PT6602
1.5
PT6608
1.7
PT6606
1.8
PT6603
2.5
PT6601
3.3
PT6604
3.6
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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