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TCL1587
PRELIMINARY INFORMATION
7A / 5A / 4.6A / 3A, FAST RESPONSE,
LOW DROPOUT POSITIVE LINEAR
VOLTAGE REGULATORS
TCL1584/1585/1587-04 6/6/97
TCL1584/1585/1587-04 6/6/97 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.
7A / 5A / 4.6A / 3A, FAST RESPONSE, LOW DROPOUT
POSITIVE LINEAR VOLTAGE REGULATORS
The TCL1584/1585/1587 are low dropout, positive lin-
ear voltage regulators. They have a maximum current
output specification of 7A, 5A, 4.6A and 3A respectively.
All three devices are supplied in fixed and adjustable output
voltage versions.
Good transient load response combined with low drop-
out voltage makes these devices ideal for the latest low
voltage microprocessor power supplies. Additionally, short-
circuit, thermal and safe operating area (SOA) protection is
provided internally to ensure reliable operation.
The TCL1587, TCL1585 and TCL1584 are available in
a 3-pin TO-220 tabbed power package and in a 3-pin surface
mount DDPAK-3 package.
TYPICAL OPERATING CIRCUIT
FEATURES
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Fixed and Adjustable Voltages ........1.5V and 3.3V
Optimized for Low Voltage Applications
Output Current Capability..........7A / 5A / 4.6A / 3A
Guaranteed Dropout Voltage up to Full Rated
Output
Integrated Thermal and Short-Circuit Protection
Compact 3-Pin Surface-Mount and Thru-Hole
Standard Power Packages
V
REF
Accuracy................................................. 2.0%
Load Regulation .............................................0.05%
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APPLICATIONS
Pentium
TM*
, PentiumPro
TM*
CPU Power Supplies
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PowerPC
TM*
CPU Power Supplies
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PentiumPro
TM*
System GTL+ Bus Terminators
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Low-Voltage, High Speed Microprocessors
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Post-Regulator for Switch-Mode Power Supplies
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GENERAL DESCRIPTION
ORDERING INFORMATION
Part Number
Package
Temp. Range
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
TCL1584-3.3CAB
TCL1584-3.3CEB
TCL1584-ADJCAB
TCL1584-ADJCEB
TO-220-3
DDPAK-3
TO-220-3
DDPAK-3
TCL1585-1.5CAB
TCL1585-1.5CEB
TCL1585-3.3CAB
TCL1585-3.3CEB
TCL1585-ADJCAB
TCL1585-ADJCEB
TO-220-3
DDPAK-3
TO-220-3
DDPAK-3
TO-220-3
DDPAK-3
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
TCL1587-1.5CAB
TCL1587-1.5CEB
TCL1587-3.3CAB
TCL1587-3.3CEB
TCL1587-ADJCAB
TCL1587-ADJCEB
TO-220-3
DDPAK-3
TO-220-3
DDPAK-3
TO-220-3
DDPAK-3
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
0
°
C to + 70
°
C
TCL1584
TCL1585
V
OUT
= 3.3V
TCL158x-3.3
GND
V
IN
= 5V
C1 = 10
μ
F
C2*
(Tantalum)
V
IN
V
OUT
Fixed Output Voltage Version
V
OUT
=
(1+ R1/R2)V
REF
C2*
(Tantalum)
TCL158x
ADJ
V
IN
= 5V
C1 = 10
μ
F
V
IN
V
OUT
Adjustable Output Voltage Version
*NOTE: C2 is required to ensure output stability. Minimum 22
μ
F (TCL1584) or 10
μ
F (TCL1585/7),
low ESR tantalum type. Larger values may be required for high output current transient
regulation. See Applicationssection.
R1
R2
PIN CONFIGURATIONS
V
O
V
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A
A
V
O
V
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1
2
3
1
2
3
TCL1584CAB
TCL1585CAB
TCL1587CAB
TCL1584CEB
TCL1585CEB
TCL1587CEB
TO-220-3
DDPAK-3
NOTE:
For TO-220
Θ
= 53
°
C/W. For DDPAK-3
Θ
= 76
°
C/W.
Θ
for both packages
are specified
without external heat sinks
. See Applications Section for details.