PT6500 Datasheet, PDF (1/7 Pages) Texas Instruments – 8 AMP ADJUSTABLE ISR WITH SHORT-CIRCUIT PROTECTION

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PT6500
Series
8 AMP ADJUSTABLE ISR
WITH SHORT-CIRCUIT PROTECTION
Revised 7/15/98
Application Notes
Mechanical Outline
Product Selector Guide
• 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.
Standard Application
VIN
(+)
C1
Q1
INH
COM
4,5,6
3
14
PT6501,2,3
11,12,13
Remote Sense
1
C2
7,8,9,10
C₁ = Required 330µF electrolytic
C₂ = Required 330µF electrolytic
Pin-Out Information Ordering Information
Pin Function
PT6501¨ = 3.3 Volts
1 Remote Sense † PT6502¨ = 1.5 Volts
2
Do not connect
PT6503¨ = 2.5 Volts
VO Adjust
3
STBY*-Standby
PT6504¨ = 3.6 Volts
VOUT
(+)
4
Vin
5
Vin
6
Vin
7 GND
COM
8 GND
† PT6505¨ = 1.2 Volts
† PT6506¨ = 1.8 Volts
† PT6507¨ = 1.3 Volts
† PT6508¨ = 1.7 Volts
9 GND
†3.3V Input Bus Capable
10 GND
11
V_out
12
V_out
13
V_out
14
V_out Adjust
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Heat Tab Configuration
None
Side
Vertical Through-Hole N
R
Horizontal Through-Hole A
G
Horizontal Surface Mount C
B
Pkg Style 400
Specifications
Characteristics
(T_a=25°C unless noted)
Output Current
Current Limit
Short Circuit Current
Input Voltage Range
Output Voltage Tolerance
Output Adjust Range
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
with Co = 330µF
Efficiency
Symbols
Io
I_cl
I_sc
Vin
∆V_o
V_o
Regline
Reg_load
V_n
t_tr
Vos
η
* ISR will operate down to no load with reduced specifications.
Conditions
Over Vin range
Vin=+5V
V_in=+5V
0.1≤ Io≤ 8.0A
Vo=2.5V and 3.3V
V_o=1.5V, 1.2V, 1.3V
Vo=3.6V
V_in = +5V, I_o = 8.0A
T_a = 0 to +70°C
V_nom = 3.3V
Vnom = 1.5V
Vnom = 2.5V
Pin 14 to V_o or GND
V_adj = (PT6501)
Vadj = (PT6502)
Vadj = (PT6503)
V_adj = (PT6504)
4.5V ≤ Vin ≤ 6.0V, Io = 8.0A (PT6501/4)
3.1V ≤ V_in ≤ 6.0V, I_o = 8.0A (PT6502)
4.5V ≤ Vin ≤ 6.0V, Io = 8.0A (PT6503)
0.1 ≤ I_o ≤ 8.0A, V_in = +5V
(PT6501/4)
(PT6502)
(PT6503)
Vin = +5V, Io = 8.0 Amp
I_o step from 4A to 8.0A
Vo over/undershoot
V_in = +5V, I_o = 3.0A
V_in = +5V, I_o = 8.0A
(PT6501/6504)
(PT6502)
(PT6503)
(PT6501/6504)
(PT6502)
(PT6503)
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.
PT6500 SERIES
Min
Typ
0.1*
—
—
13.0
—
15.0
4.5
—
3.1
—
4.8
—
V_o-0.1 —
2.25
—
1.27
—
1.80
—
2.50
—
±7
—
±3
±7
—
±17
—
±12
±13
—
50
—
100
—
150
—
90
—
76
—
85
—
83
—
68
—
76
Max
8.0
20.0
—
6
6
6
V_o+0.1
4.20
2.65
3.50
4.30
±17
±8
±13
±33
±23
±25
—
—
—
—
—
—
—
—
—
Units
A
A
Apk
V
V
V
V
V_inmin=3.1V
or Vo+1.2V
(whichever
is greater)
mV
mV
mVpp
µsec
mV
%
%
%
%
%
%
2
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.powertrends.com