Texas Instruments PT6502A, PT6502B, PT6502C, PT6502G, PT6502N Datasheet

...
8A Single Device Power
Up to 90% efficiency (PT6501)
Small SIP Footprint
Standby Function
Internal Short Circuit Protection
Over-Temperature Protection
Adjustable Output Voltage
The PT6500 series is Power Trends’ new high performance +3.1 to 6V input, 8 Amp, 14-Pin SIP (Single In­line-Package) Integrated Switching Regulator (ISR). This high-perfor-
mance ISR allows easy integration of high-speed, low-voltage Pentium pro­cessors and their support logic into existing 3.3V or 5V systems without redesigning the central power supply. The high-performance PT6502 solves the problem of providing the low ter­minating voltages required by BTL/ Futurebus+, CTT, HP, and GTL Buses from existing 3.3V or 5V power rails without redesigning the central power supply.
Ordering Information
PT6501¨ = 3.3 Volts PT6502¨ = 1.5 Volts PT6503¨ = 2.5 Volts PT6504¨ = 3.6 Volts PT6505¨ = 1.2 Volts PT6506¨ = 1.8 Volts PT6507¨ = 1.3 Volts PT6508¨ = 1.7 Volts
PT Series Suffix
(PT1234X)
Case/Pin Heat Tab Configuration Configuration None Side
Vertical Through-Hole
NR
Horizontal Through-Hole
AG
Horizontal Surface Mount
CB
Standard Application
C1 = Required 330µF electrolytic C2 = Required 330µF electrolytic
V
IN
(+)
COM
PT6501,2,3
3
7,8,9,10
11,12,13
COM
V
OUT
(+)
C1 C2
INH
V
O
Adjust
4,5,6
14
Q1
Remote Sense 1
Pin-Out Information
8 AMP ADJUSTABLE ISR WITH SHORT-CIRCUIT PROTECTION
PT6500 Series
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2
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Pin Function
1 Remote Sense 2 Do not connect 3 STBY*-Standby 4V
in
5V
in
6V
in
7
GND
8 GND
9 GND 10 GND 11 V
out
12 V
out
13 V
out
14 V
out
Adjust
Pkg Style 400
Specifications
Characteristics
PT6500 SERIES
(Ta=25°C unless noted) Symbols Conditions Min Typ Max Units
Output Current I
o
Over Vin range 0.1* 8.0 A
Current Limit I
cl
Vin=+5V 13.0 20.0 A
Short Circuit Current I
sc
Vin=+5V 15.0 Apk
Input Voltage Range V
in
0.1 Io≤ 8.0A Vo=2.5V and 3.3V 4.5 6 V V
o
=1.5V, 1.2V, 1.3V 3.1 6 V
Vo=3.6V 4.8 6 V
Output Voltage Tolerance ∆V
o
V
in
= +5V, Io = 8.0A Vo-0.1 Vo+0.1 V
Ta = 0 to +70°C
Output Adjust Range V
o
V
nom
= 3.3V V
adj
= (PT6501) 2.25 4.20 Vinmin=3.1V
V
nom
= 1.5V V
adj
= (PT6502) 1.27 2.65 or Vo+ 1.2V
V
nom
= 2.5V V
adj
= (PT6503) 1.80 3.50 (whichever
Pin 14 to Vo or GND V
adj
= (PT6504) 2.50 4.30 is greater)
Line Regulation Reg
line
4.5V V
in
6.0V, Io = 8.0A (PT6501/4) ±7 ±17
3.1V ≤ V
in
6.0V, Io = 8.0A (PT6502) ±3 ±8 mV
4.5V ≤ V
in
6.0V, Io = 8.0A (PT6503) ±7 ±13
Load Regulation Reg
load
0.1 Io ≤ 8.0A, V
in
= +5V (PT6501/4) ±17 ±33
(PT6502) ±12 ±23 mV (PT6503) ±13 ±25
Vo Ripple/Noise V
n
V
in
= +5V, Io = 8.0 Amp 50 mVpp
Transient Response
t
tr
Io step from 4A to 8.0A 100 µsec
with Co = 330µF V
os
Vo over/undershoot 150 mV
Efficiency η V
in
= +5V, Io = 3.0A (PT6501/6504) 90 %
(PT6502) 76 % (PT6503) 85 %
V
in
= +5V, Io = 8.0A (PT6501/6504) 83 %
(PT6502) 68 % (PT6503) 76 %
* ISR will operate down to no load with reduced specifications.
Note:
The PT6500 Series requires a 330µF electrolytic or tantalum input and output capacitor for proper operation in all applications.
See PT6000/7000 Series Capacitor application note.
†3.3V Input Bus Capable
† † † †
Revised 7/15/98
Application Notes
Mechanical Outline
Product Selector Guide
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.
PT6501, 3.3 VDC, Vin=5.0V
(See Note 1)
PT6502, 1.5 VDC, Vin=5.0V
(See Note 1)
PT6503, 2.5 VDC, Vin=5.0V
(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
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5V to 3.x Converters
3.3V Bus Products
DATA SHEETS
PT6500 Series
CHARACTERISTIC DATA
Specifications (continued)
Characteristics
PT65000 SERIES
(Ta=25°C unless noted) Symbols Conditions Min Typ Max Units
Switching Frequency ƒ
o
Over Vin and Io ranges 475 600 725 KHz
Absolute Maximum T
a
0—+8C
Operating Temperature Range Recommended Operating T
a
V
in
= +5V, Io = 6.0A
0 +70** °C
Temperature Range Free Air Convection (40-60LFM) Thermal Resistance θ
ja
Free Air Convection (40-60LFM) 15 °C/W
Storage Temperature T
s
-40 +125 °C
Mechanical Shock Per Mil-STD-883D, Method 2002.3, 500 G’s
1msec, half sine, fixture mounted
Mechanical Vibration 7.5 G’s
Weight 23 grams
** See Thermal Derating charts.
Note: The PT6500 Series requires a 330µF electrolytic or tantalum input and output capacitor for proper operation in all applications.
Power Dissipation vs Output CurrentPower Dissipation vs Output Current Power Dissipation vs Output Current
0
1
2
3
4
5
6
7
012345678
Iout-(Amps)
Pd-(Watts)
6.0V
5.5V
5.0V
4.5V
Vin
0
1
2
3
4
5
6
012
345678
Iout-(Amps)
Pd-(Watts)
6.0V
5.0V
4.5V
4.0V
3.5V
3.1V
Vin
0
1
2
3
4
5
6
7
012345678
Iout-(Amps)
Pd-(Watts)
6.0V
5.5V
5.0V
4.5V
4.0V
Vin
40
50
60
70
80
90
100
012345678
Iout-(Amps)
Efficiency-%
4.5V
5.0V
5.5V
6.0V
Vin
40
50
60
70
80
90
100
012345678
Iout-(Amps)
Efficiency-%
3.1V
3.5V
4.0V
4.5V
5.0V
6.0V
Vin
40
50
60
70
80
90
100
012345678
Iout-(Amps)
Efficiency-%
4.0V
4.5V
5.0V
5.5V
6.0V
Vin
0
5
10
15
20
25
30
35
012345678
Iout-(Amps)
Ripple-(mV)
6.0V
5.5V
5.0V
4.5V
Vin
0
10
20
30
40
50
01
2345678
Iout-(Amps)
Ripple-(mV)
3.1V
3.5V
4.0V
4.5V
5.0V
6.0V
Vin
0
10
20
30
40
50
60
012345678
Iout-(Amps)
Ripple-(mV)
6.0V
5.5V
5.0V
4.5V
4.0V
Vin
0
1
2
3
4
5
6
7
8
4.5 4.75 5 5.25 5.5 5.75 6 Vin-(Volts)
Iout-(Amps)
50˚C
35˚C
25˚C
60˚C
70˚C
85˚C
Vin-(Volts)
Iout-(Amps)
0
1
2
3
4
5
6
7
8
4.5 4.75 5 5.25 5.5 5.75 6
35˚C 50˚C
70˚C 85˚C
Vin-(Volts)
Iout-(Amps)
0
1
2
3
4
5
6
7
8
4.5 4.75 5 5.25 5.5 5.75 6
70˚C
85˚C
60˚C
0
1
2
3
4
5
6
7
8
4.5 4.75 5 5.25 5.5 5.75 6
Vin-(Volts)
Iout-(Amps)
50˚C
85˚C
70˚C
60˚C
0
1
2
3
4
5
6
7
8
4.5 4.75 5 5.25 5.5 5.75 6 Vin-(Volts)
Iout-(Amps)
85˚C
70˚C
0
1
2
3
4
5
6
7
8
4.5 4.75 5 5.25 5.5 5.75 6 Vin-(Volts)
Iout-(Amps)
85˚C
70˚C
0
1
2
3
4
5
6
7
8
3 3.5 4 4.5 5 5.5 6
Vin-(Volts)
Iout-(Amps)
50˚C
60˚C
70˚C
85˚C
0
1
2
3
4
5
6
7
8
3 3.5 4 4.5 5 5.5 6
Vin-(Volts)
Iout-(Amps)
50˚C
60˚C
70˚C
85˚C
0
1
2
3
4
5
6
7
8
3 3.5 4 4.5 5 5.5 6
Vin-(Volts)
Iout-(Amps)
70˚C
85˚C
0
1
2
3
4
5
6
7
8
3 3.5 4 4.5 5 5.5 6
Vin-(Volts)
Iout-(Amps)
50˚C
85˚C
70˚C
60˚C
Vin-(Volts)
Iout-(Amps)
0
1
2
3
4
5
6
7
8
3 3.5 4 4.5 5 5.5 6
85˚C
70˚C
Vin-(Volts)
Iout-(Amps)
0
1
2
3
4
5
6
7
8
3 3.5 4 4.5 5 5.5 6
85˚C
70˚C
Thermal Derating (Ta) (See Note 2)
THERMAL DERATING CURVES Air Flow (LFM)
60 200 300 PT6501 (See Note 1)
No Heat Tab
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 different air flow rates as indicated on each graph, with or without the heat tab, soldered in a printed circuit board. (See Thermal Application Notes.)
Thermal Derating (Ta) (See Note 2)
Heat Tab
Thermal Derating (Ta) (See Note 2)
Thermal Derating (Ta) (See Note 2)
Thermal Derating (Ta) (See Note 2) Thermal Derating (Ta) (See Note 2)
PT6502 (See Note 1) No Heat Tab
Thermal Derating (Ta) (See Note 2)
Heat Tab
Thermal Derating (Ta) (See Note 2) Thermal Derating (Ta) (See Note 2)
Thermal Derating (Ta) (See Note 2)
Thermal Derating (Ta) (See Note 2) Thermal Derating (Ta) (See Note 2)
PT6500 THERMAL DATA
For assistance or to order, call (800) 531-5782
4
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
THERMAL DERATING CURVES Air Flow (LFM)
60 200 300 PT6503 (See Note 1)
No Heat Tab
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 different air flow rates as indicated on each graph, with or without the heat tab, soldered in a printed circuit board. (See Thermal Application Notes.)
For assistance or to order, call (800) 531-5782
Thermal Derating (Ta) (See Note 2)
Thermal Derating (Ta) (See Note 2) Thermal Derating (Ta) (See Note 2)
Heat Tab
Thermal Derating (Ta) (See Note 2)
Thermal Derating (Ta) (See Note 2) Thermal Derating (Ta) (See Note 2)
PT6500 THERMAL DATA
5
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
5V to 3.x Converters
3.3V Bus Products
DATA SHEETS
0
1
2
3
4
5
6
7
8
4.5 5 5.5 6 Vin-(Volts)
Iout-(Amps)
50˚C
60˚C
70˚C
85˚C
0
1
2
3
4
5
6
7
8
4.5 4.75 5 5.25 5.5 5.75 6 Vin-(Volts)
Iout-(Amps)
85˚C
70˚C
0
1
2
3
4
5
6
7
8
4.5 4.75 5 5.25 5.5 5.75 6 Vin-(Volts)
Iout-(Amps)
70˚C
85˚C
0
1
2
3
4
5
6
7
1
3
5
7
8
4.5 4.75 5 5.25 5.5 5.75 6 Vin-(Volts)
Iout-(Amps)
85˚C
70˚C
60˚C
50˚C
0
2
4
6
8
4.5 4.75 5 5.25 5.5 5.75 6 Vin-(Volts)
Iout-(Amps)
85˚C
70˚C
0
2
4
6
8
4.5 4.75 5 5.25 5.5 5.75 6 Vin-(Volts)
Iout-(Amps)
85˚C
70˚C
1
3
5
7
For assistance or to order, call (800) 531-5782
3
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Application Notes
PT6500/PT6600 Series
More Application Notes
Adjusting the Output Voltage of the PT6500 and PT6600 5V Bus Converters
The output voltage of the Power Trends PT6500/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 Va (min) and Va (max).
Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 14 (V
o
adjust) and pins 7-10
(GND).
Adjust Down: Add a resistor (R1), between pin 14 (V
o
adjust)
and pins 11-13 (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 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 Vo 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 (Vo 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.
Figure 1
C
in
330µF
+
C
out
330µF
+
(R1) Adj Down
R2 Adjust Up
Vo
COM
Vin
COM
PT6500/6600
11,12,13
147,8,9,10
4,5,6
Vin
Vo
GND Vo(adj)STBY
3
Vo(sense)
1
L O A D
The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulae.
Ro (Va – 1.0)
(R1) =
(V
o
– Va)
– R
s
k
R
o
– R
s
k
R2 =
V
a
- V
o
Where: Vo= Original output voltage
V
a
= Adjusted output voltage
R
o
= The resistance value in Table 1
R
s
= The series resistance from Table 1
Table 1
PT6500/6600 ADJUSTMENT AND FORMULA PARAMETERS
Series Pt # PT6505 PT6507 PT6502 PT6508 PT6506 PT6503 PT6501 PT6504
PT6605 PT6607 PT6602 PT6608 PT6606 PT6603 PT6601 PT6604
Vo (nom) 1.2 1.3 1.5 1.7 1.8 2.5 3.3 3.6 Va (min) 1.14 1.19 1.27 1.36 1.4 1.8 2.25 2.5 Va (max) 2.35 2.45 2.65 2.85 2.95 3.5 4.2 4.3 Ro (k
ΩΩ
ΩΩ
Ω) 2.49 2.49 2.49 2.49 2.49 4.99 12.1 10.0
Rs (k
ΩΩ
ΩΩ
Ω) 2.0 2.0 2.0 2.0 2.0 4.22 12.1 12.1
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Application
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
Notes
PT6500/PT6600 Series
Table 2
PT6500/PT6600 ADJUSTMENT RESISTOR VALUES
Series Pt # PT6505 PT6507 PT6502 PT6508 PT6506 PT6503 PT6501 PT6504
PT6605 PT6607 PT6602 PT6608 PT6606 PT6603 PT6601 PT6604 Vo (nom) 1.2 1.3 1.5 1.7 1.8 2.5 3.3 3.6 Va (req’d)
1.15 (5.5)k
1.2 (3.0)k
1.25 47.8k (10.5)k
1.3 22.9k (1.7)k
1.35 14.6k 47.8k (3.8)k
1.4 10.5k 22.9k (8.0)k (1.3)k (0.5)k
1.45 8.0k 14.6k (20.4)k (2.5)k (1.2)k
1.5 6.3k 10.5k (4.2)k (2.2)k
1.55 5.1k 8.0k 47.8k (7.1)k (3.5)k
1.6 4.2k 6.3k 22.9k (12.9)k (5.5)k
1.65 3.5k 4.1k 14.6k (30.4)k (8.8)k
1.7 3.0k 4.2k 10.5k (15.4)k
1.75 2.5k 3.5k 8.0k 47.8k (35.4)k
1.8 2.2k 3.0k 6.3k 22.9k (1.5)k
1.85 1.8k 2.5k 5.1k 14.6k 47.8k (2.3)k
1.9 1.6k 2.2k 4.2k 10.5k 22.9k (3.3)k
1.95 1.3k 1.8k 3.5k 8.0k 14.6k (4.4)k
2.0 1.1k 1.6k 3.0k 6.3k 10.5k (5.8)k
2.05 0.9k 1.3k 2.5k 5.1k 8.0k (7.4)k
2.1 0.8k 1.1k 2.2k 4.2k 6.3k (9.5)k
2.15 0.6k 0.9k 1.8k 3.5k 5.1k (12.2)k
2.2 0.5k 0.8k 1.6k 3.0k 4.2k (15.7)k
2.25 0.4k 0.6k 1.3k 2.5k 3.5k (20.7)k (2.3)k
2.3 0.3k 0.5k 1.1k 2.2k 3.0k (28.2)k (3.6)k
2.35 0.2k 0.4k 0.9k 1.8k 2.5k (40.7)k (5.1)k
2.4 0.3k 0.8k 1.6k 2.2k (65.6)k (6.7)k
2.45 0.2k 0.6k 1.3k 1.8k (140.0)k (8.5)k
2.5 0.5k 1.1k 1.6k (10.6)k (1.5)k
2.55 0.4k 0.9k 1.3k 95.6k (12.9)k (2.7)k
2.6 0.3k 0.8k 1.1k 45.7k (15.6)k (3.9)k
2.65 0.2k 0.6k 0.9k 29.0k (18.6)k (5.3)k
2.7 0.5k 0.8k 20.7k (22.2)k (6.8)k
2.75 0.4k 0.6k 15.7k (26.4)k (8.5)k
2.8 0.3k 0.5k 12.4k (31.5)k (10.4)k
2.85 0.2k 0.4k 10.0k (37.6)k (12.6)k
2.9 0.3k 8.3k (45.4)k (15.0)k
2.95 0.2k 0.9k (55.3)k (17.9)k
3.0 5.8k (68.6)k (21.2)k
3.1 4.1k (115.0)k (29.9)k
3.2 2.9k (254.0)k (42.9)k
3.3 2.0k (64.6)k
3.4 1.3k 109.0k (108.0)k
3.5 0.8k 48.4k (238.0)k
3.6 28.2k
3.7 18.2k 87.9k
3.8 12.1k 37.9k
3.9
4/.
V
out
>3.8Vdc requires Vin >5.0Vdc ! 8.1k 21.2k
4.0 5.2k 12.9k
4.1 3.0k 7.9k
4.2 1.3k 4.6k
4.3 2.2k
R1 = (Red) R2 = Black
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