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 In-
line-Package) Integrated Switching
Regulator (ISR). This high-perfor-
mance ISR allows easy integration of
high-speed, low-voltage Pentium pro-
cessors 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 ter-
minating 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 330F electrolytic
C2 = Required 330F electrolytic
VIN
(+)
COM
PT6501,2,3
3
7,8,9,10
11,12,13
COM
VOUT
(+)
C1
C2
INH
VO Adjust
4,5,6
14
Q1
Remote Sense
1
Pin-Out Information
8 AMP ADJUSTABLE ISR
WITH SHORT-CIRCUIT PROTECTION
PT6500
Series
For assistance or to order, call (800) 531-5782
2
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
Pin
Function
1
Remote Sense
2
Do not connect
3
STBY*-Standby
4Vin
5Vin
6Vin
7
GND
8
GND
9
GND
10
GND
11
Vout
12
Vout
13
Vout
14
Vout Adjust
Pkg Style 400
Specifications
Characteristics
PT6500 SERIES
(T
a=25
°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Over Vin range
0.1*
—
8.0
A
Current Limit
Icl
Vin=+5V
—
13.0
20.0
A
Short Circuit Current
Isc
Vin=+5V
—
15.0
—
Apk
Input Voltage Range
Vin
0.1
≤ Io≤ 8.0A
Vo=2.5V and 3.3V
4.5
—
6
V
Vo=1.5V, 1.2V, 1.3V
3.1
—
6
V
Vo=3.6V
4.8
—
6
V
Output Voltage Tolerance
Vo
Vin = +5V, Io = 8.0A
Vo-0.1
—
Vo+0.1
V
Ta = 0 to +70°C
Output Adjust Range
Vo
Vnom = 3.3V
Vadj = (PT6501)
2.25
—
4.20
Vinmin=3.1V
Vnom = 1.5V
Vadj = (PT6502)
1.27
—
2.65
or Vo+1.2V
Vnom = 2.5V
Vadj = (PT6503)
1.80
—
3.50
(whichever
Pin 14 to Vo or GND
Vadj = (PT6504)
2.50
4.30
is greater)
Line Regulation
Regline
4.5V
≤ Vin ≤ 6.0V, Io = 8.0A (PT6501/4)
—
±7
±17
3.1V
≤ Vin ≤ 6.0V, Io = 8.0A
(PT6502)
—
±3
±8
mV
4.5V
≤ Vin ≤ 6.0V, Io = 8.0A
(PT6503)
±7
±13
Load Regulation
Regload
0.1
≤ Io ≤ 8.0A, Vin = +5V
(PT6501/4)
—
±17
±33
(PT6502)
—
±12
±23
mV
(PT6503)
±13
±25
Vo Ripple/Noise
Vn
Vin = +5V, Io = 8.0 Amp
—
50
—
mVpp
Transient Response
ttr
Io step from 4A to 8.0A
—
100
—
sec
with Co = 330F
Vos
Vo over/undershoot
—
150
—
mV
Efficiency
η
Vin = +5V, Io = 3.0A
(PT6501/6504)
—
90
—
%
(PT6502)
—
76
—
%
(PT6503)
—
85
—
%
Vin = +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 330F 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