LT1585-1.5/LT1585A-1.5
Fixed 1.5V, 4.6A and 5A
Low Dropout, Fast Response
GTL+ Regulators
DESCRIPTIO
The LT
廬
1585-1.5/LT1585A-1.5 are low dropout, 3-termi-
nal regulators with 4.6A and 5A output current capability
respectively, and a fixed 1.5V output voltage. The designs
are optimized for low voltage applications where transient
response and minimum input voltage are critical. Similar to
the LT1084, they have lower dropout and faster transient
response. These improvements make them ideal for low
voltage microprocessor applications, especially as the
regulator in an Intel processor GTL+ supply.
Current limit is trimmed to ensure specified output current
and controlled short-circuit current. On-chip thermal lim-
iting provides protection against any combination of over-
load that creates excessive junction temperatures.
The LT1585-1.5/LT1585A-1.5 are available in the through-
hole 3-pin TO-220 power package and 3-pin plastic DD.
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
s
s
s
s
s
Fast Transient Response
Guaranteed Dropout Voltage at Multiple Currents
Load Regulation: 0.05% Typ
Trimmed Current Limit
On-Chip Thermal Limiting
APPLICATIO S
s
s
s
GTL+ Power Supply
Low Voltage Logic Supplies
Battery-Powered Circuitry
TYPICAL APPLICATIO
3.3V
LT1585A-1.5
V
IN
V
OUT
GND
Intel Processor GTL+ Supply
V
TT
= 1.5V
5A
C7 TO
C12
1碌F
C3 TO C6
100碌F
10V
R1
75鈩?/div>
R2
150鈩?/div>
R5
100鈩?/div>
C13
0.1碌F
R7
100鈩?/div>
R8
100鈩?/div>
R6
100鈩?V
REF
R3
75鈩?/div>
R4
150鈩?/div>
C14
0.1碌F
+
C1, C2
100碌F
10V
+
V
REF
RX
TX
Q1
RX
NOTE: LTC RECOMMENDS CENTRALLY
LOCATING THE LT1585A-1.5 TO MINIMIZE
V
TT
DISTRIBUTION DROPS AND USING
SEPARATE V
REF
GENERATORS AT EACH
BUS END
TX
Q3
鈥?/div>
鈥?/div>
鈥?/div>
142 TOTAL SIGNAL LINES
U
U
U
RX
Q2
TX
RX
Q4
TX
1585-1.5 鈥?TA01
1
LT1585A-1.5相關(guān)型號PDF文件下載
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