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 http://www.powertrends.com
10
Application Notes
Mechanical Outline
Product Selector Guide
Revised 5/15/98
3 AMP ADJUSTABLE POSITIVE STEP-DOWN
INTEGRATED SWITCHING REGULATORS
P T 6 3 0 0
S e r i e s
•
90% Efficiency
•
Adjustable Output Voltage
•
Internal Short Circuit Protection
•
Over-Temperature Protection
•
On/Off Control (Ground Off)
•
Small SIP Footprint
•
Wide Input Range
The PT6300 Series is a line of
High-Performance 3 Amp, 12-Pin SIP
(Single In-line Package) Integrated
Switching Regulators (ISRs) 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 family
offers a unique combination of features
combining 90% typical efficiency with
open-collector on/off control and ad-
justable output voltage.
Quiescent current in the shutdown
mode is typically less than 100µA.
Standard Application
C
1
= Optional 1µF ceramic
C
2
= Required 100µF electrolytic
Q
1
= NFET
Ordering Information
PT6302
¨ = +5 Volts
PT6303
¨ = +3.3 Volts
PT6304
¨ = +12 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
PT6300 SERIES
(T
a
=25
°
C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
I
o
Over V
in
range
0.1*
—
3.0
A
Short Circuit Current
I
sc
V
in
= V
o
+
5V
—
5.0
—
Apk
Input Voltage Range
V
in
0.1
≤
I
o
≤
3.0 A
V
o
= 3.3V
9
—
26
V
(Note: inhibit function cannot
V
o
= 5V
9
—
30/38**
V
be used above 30V.)
V
o
= 12V
16
—
30/38**
V
Output Voltage Tolerance
∆
V
o
Over V
in
Range, I
o
= 3.0 A
—
±1.0
±2.0
%V
o
T
a
= 0°C to +60°C
Line Regulation
Reg
line
Over V
in
range
—
±0.25
±0.5
%V
o
Load Regulation
Reg
load
0.1
≤
I
o
≤
3.0 A
—
±0.25
±0.5
%V
o
V
o
Ripple/Noise
V
n
V
in
= V
in
min, I
o
= 3.0 A
—
±2
—
%V
o
Transient Response
t
tr
50% load change
—
100
200
µSec
with C
o
= 100µF
V
os
V
o
over/undershoot
—
5.0
—
%V
o
Efficiency
η
V
in
=9V, I
o
= 0.5 A, V
o
= 3.3V
—
84
—
%
V
in
=9V, I
o
= 0.5 A, V
o
= 5V
—
89
—
%
V
in
=16V, I
o
= 0.5 A, V
o
= 12V
—
91
—
%
Switching Frequency
ƒ
o
Over V
in
and I
o
ranges, V
o
= 3.3V/5V
400
500
600
kHz
V
o
= 12V
600
750
900
kHz
Shutdown Current
I
sc
V
in
= 15V
—
100
—
µA
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
—
+80***
°
C
Temperature Range
At V
in
= 24V, I
o
= 2.5A
Thermal Resistance
θ
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. *** See Thermal Derating chart.
Note: The PT6300 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
Pkg Style 200
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 http://www.powertrends.com
11
W
ide Input Range Pr
oducts
DA
T
A
SHEETS
C H A R A C T E R I S T I C D A T A
0
0.5
1
1.5
2
2.5
3
9
11
13
15
17
19
21
23
25
27
0
0.5
1
1.5
2
2.5
3
16
19
22
25
28
31
34
37
0
0.5
1
1.5
2
2.5
3
9
13
17
21
25
29
33
37
PT6303, 3.3 VDC
(See Note 1)
PT6302, 5.0 VDC
(See Note 1)
PT6304, 12.0 VDC
(See Note 1)
Efficiency vs Output Current
Ripple vs Output Current
Thermal Derating (T
a
)
(See Note 2)
Power Dissipation vs Output Current
Efficiency - %
Ripple-(mV)
Iout-(Amps)
PD-(W
atts)
Efficiency - %
Efficiency - %
Ripple-(mV)
Ripple-(mV)
Iout-(Amps)
Iout-(Amps)
PD-(W
atts)
PD-(W
atts)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Vin-(Volts)
Vin-(Volts)
Vin-(Volts)
40
50
60
70
80
90
100
0
0.5
1
1.5
2
2.5
3
9.0V
12.0V
15.0V
20.0V
26.0V
Vin
40
50
60
70
80
90
100
0
0.5
1
1.5
2
2.5
3
9.0V
12.0V
15.0V
24.0V
30.0V
38.0V
Vin
40
50
60
70
80
90
100
0
0.5
1
1.5
2
2.5
3
16.0V
20.0V
24.0V
30.0V
38.0V
Vin
0
20
40
60
80
100
120
140
160
0
0.5
1
1.5
2
2.5
3
26.0V
20.0V
15.0V
12.0V
9.0V
V
Vin
0
20
40
60
80
100
120
140
160
180
0
0.5
1
1.5
2
2.5
3
38.0V
30.0V
24.0V
15.0V
12.0V
9.0V
Vin
0
50
100
150
200
250
300
350
0
0.5
1
1.5
2
2.5
3
38.0V
30.0V
24.0V
20.0V
16.0V
Vin
0
0.5
1
1.5
2
2.5
3
3.5
0
0.5
1
1.5
2
2.5
3
26.0V
20.0V
15.0V
12.0V
9.0V
Vin
0
0.5
1
1.5
2
2.5
3
3.5
0
0.5
1
1.5
2
2.5
3
38.0V
30.0V
24.0V
15.0V
12.0V
9.0V
Vin
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0
0.5
1
1.5
2
2.5
3
38.0V
30.0V
24.0V
20.0V
16.0V
Vin
70°C
50°C
Note 1:
All data listed in the above graphs except for derating data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR
Note 2:
Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application note.)
50°C
60°C
40°C
70°C
85°C
70°C
P T 6 3 0 0
S e r i e s
85°C
60°C
60°C
Thermal Derating (T
a
)
(See Note 2)
Thermal Derating (T
a
)
(See Note 2)
Ripple vs Output Current
Ripple vs Output Current
Efficiency vs Output Current
Efficiency vs Output Current
Power Dissipation vs Output Current
Power Dissipation vs Output Current
For assistance or to order, call
(800) 531-5782
3
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902 http://www.powertrends.com
A p p l i c a t i o n
N o t e s
PT6100/6120/6210/6220/6300/6320 Series
More Application Notes
Adjusting the Output Voltage of the Wide Input
Range Bus ISRs
The output voltage of the Power Trends’ Wide Input Range
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 for either 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 12 (V
o
adjust) and pins 5-8
(GND).
Adjust Down:
Add a resistor
(R1)
, between pin 12 (V
o
adjust)
and pins 9-11(V
out
).
Refer to Figure 1 and Table 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 loca-
tion. Place the resistor as close to the ISR as possible.
2. Never connect capacitors from V
o
adjust to either GND or
V
out
. Any capacitance added to the V
o
adjust pin will affect
the stability of the ISR.
4. Adjustments to the output voltage may place additional
limits on the maximum and minimum input voltage for the
part. The revised maximum and minimum input voltage
limits must comply with the following requirements. Note
that the minimum input voltage limits are also model depen-
dant.
V
in
(max)
= (8 x V
a
)V or
*
30/38V, whichever is less.
PT6x
0
x/PT6x
1
x series:
V
in
(min)
= (V
a
+ 4)V or 9V, whichever is highest.
PT6x
2
x series:
V
in
(min)
= (V
a
+ 2.5)V or 7.5V, whichever is highest.
*
Limit is 30V when inhibit function is used.
Figure 1
The values of
(R1)
[adjust down], and R2 [adjust up], can
also be calculated using the following formulae.
R
o
(V
a
– 1.25)
(R1)
=
V
o
– V
a
k
Ω
1.25 R
o
k
Ω
R2
=
V
a
– V
o
Where: V
o
= Original output voltage
V
a
= Adjusted output voltage
R
o
= The resistance value fromTable 1
Table 1
ISR ADJUSTMENT RANGE AND FORMULA PARAMETERS
1Adc Rated
PT6102
PT6101
PT6103
PT6122
PT6121
2Adc Rated
PT6213
PT6212
PT6214
PT6223
PT6222
3Adc Rated
PT6303
PT6302
PT6304
PT6323
PT6322
Vo (nom)
3.3
5.0
5.0
12.0
Va (min)
1.89
1.88
2.18
2.43
Va (max)
6.07
11.25
8.5
22.12
Ro (k
Ω
Ω
Ω
Ω
Ω
)
66.5
150.0
90.9
243.0
R 2
Adjust Up
C 1
1
µ
F Ceramic
(Optional)
C 2
100
µ
F
(Req'd)
Vo
C O M
C O M
Vin
+
(R1)
Adj Down
PT6100/6200/6300
9 , 1 0 , 1 1
1 2
5,6,7,8
2,3,4
Vin
V o
G N D
Vo(adj)
For assistance or to order, call
(800) 531-5782
4
A p p l i c a t i o n
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902 http://www.powertrends.com
N o t e s
PT6100/6120/6210/6220/6300/6320 Series
ISR ADJUSTMENT RESISTOR VALUES (Cont)
1Adc Rated
PT6101
PT6103
PT6121
2Adc Rated
PT6212
PT6214
PT6222
3Adc Rated
PT6302
PT6304
PT6322
V
o
(nom)
5.0
5.0
12.0
V
a
(req.d)
6.2
156.0k
Ω
94.7k
Ω
(207.0)k
Ω
6.4
134.0k
Ω
81.2k
Ω
(223.0)k
Ω
6.6
117.0k
Ω
71.0k
Ω
(241.0)k
Ω
6.8
104.0k
Ω
63.1k
Ω
(259.0)k
Ω
7.0
93.8k
Ω
56.8k
Ω
(279.0)k
Ω
7.2
85.2k
Ω
51.6k
Ω
(301.0)k
Ω
7.4
78.1k
Ω
47.3k
Ω
(325.0)k
Ω
7.6
72.1k
Ω
43.7k
Ω
(351.0)k
Ω
7.8
67.0k
Ω
40.6k
Ω
(379.0)k
Ω
8.0
62.5k
Ω
37.9k
Ω
(410.0)k
Ω
8.2
58.6k
Ω
35.5k
Ω
(444.0)k
Ω
8.4
55.1k
Ω
33.4k
Ω
(483.0)k
Ω
8.6
52.1k
Ω
(525.0)k
Ω
8.8
49.3k
Ω
(573.0)k
Ω
9.0
46.9k
Ω
(628.0)k
Ω
9.5
41.7k
Ω
(802.0)k
Ω
10.0
37.5k
Ω
(1060.0)k
Ω
10.5
34.1k
Ω
(1500.0)k
Ω
11.0
31.3k
Ω
11.5
12.0
12.5
608.0k
Ω
13.0
304.0k
Ω
13.5
203.0k
Ω
14.0
152.0k
Ω
14.5
122.0k
Ω
15.0
101.0k
Ω
15.5
86.8k
Ω
16.0
75.9k
Ω
16.5
67.5k
Ω
17.0
60.8k
Ω
17.5
55.2k
Ω
18.0
50.6k
Ω
18.5
46.7k
Ω
19.0
43.4k
Ω
19.5
40.5k
Ω
20.0
38.0k
Ω
20.5
35.7k
Ω
21.5
33.8k
Ω
21.5
32.0k
Ω
22.0
30.4k
Ω
ISR ADJUSTMENT RESISTOR VALUES
1Adc Rated
PT6102
PT6101
PT6103
PT6122
PT6121
2Adc Rated
PT6213
PT6212
PT6214
PT6223
PT6222
3Adc Rated
PT6303
PT6302
PT6304
PT6323
PT6322
V
o
(nom)
3.3
5.0
5.0
12.0
V
a
(req.d)
1.9
(30.9)k
Ω
(31.5)k
Ω
2.0
(38.4)k
Ω
(37.5)k
Ω
2.1
(47.1)k
Ω
(44.0)k
Ω
2.2
(57.4)k
Ω
(50.9)k
Ω
(30.8)k
Ω
2.3
(69.8)k