LT1584-3.3 LINER [Linear Technology], LT1584-3.3 Datasheet

no-image

LT1584-3.3

Manufacturer Part Number
LT1584-3.3
Description
7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed
Manufacturer
LINER [Linear Technology]
Datasheet
FEATURES
APPLICATIO S
LT1585/7CM, LT1584/5/7CT
LT1585/7CM-3.3, LT1584/5/7CT-3.3
LT1585CM-3.38, LT1584/5CT-3.38
LT1585/7CM-3.45, LT1584/5/7CT-3.45
LT1585/7CM-3.6, LT1584/5/7CT-3.6
TYPICAL APPLICATIO
V
* REQUIRED FOR STABILITY
IN
Fast Transient Response
Guaranteed Dropout Voltage at Multiple Currents
Load Regulation: 0.05% Typical
Trimmed Current Limit
On-Chip Thermal Limiting
Standard 3-Pin Power Package
Pentium
PowerPC
Other 2.5V to 3.6V Microprocessor Supplies
Low Voltage Logic Supplies
Battery-Powered Circuitry
Post Regulator for Switching Supply
NOTE: MICROPROCESSOR APPLICATIONS WITH LOAD TRANSIENTS OF 3.8A REQUIRE
OUTPUT DECOUPLING CAPACITANCE > 1300 F ON FIXED VOLTAGE PARTS TO ACHIEVE
< 50mV OF DEVIATION FROM NOMINAL OUTPUT. CONSULT FACTORY FOR DETAILS
LT1584: C2 = 22 F,
LT1585/LT1587: C2 = 10 F
4.75V
TM
TM
Processor Supplies
+
Supplies
3.3V, 7A, 4.6A, 3A Regulator
C1
10 F
U
LT1584-3.3
LT1585-3.3
LT1587-3.3
U
Adjustable
3.3V Fixed
3.38V Fixed
3.45V Fixed
3.6V Fixed
+
C2*
SOLID
TANTALUM
3.3V
7A, 4.6A, 3A
1585 TA01
DESCRIPTIO
Pentium is a trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
The LT
terminal regulators with 7A, 4.6A and 3A output current
capability, respectively. Design has been optimized for low
voltage applications where transient response and mini-
mum input voltage are critical. Similar to the LT1083/4/5
family, it has lower dropout voltage and faster transient
response. These improvements make it ideal for low volt-
age microprocessor applications requiring a regulated
2.5V to 3.6V output with an input supply below 7V.
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 would create excessive junction temperatures.
The LT1585/LT1587 are available in both the through-hole
and surface mount versions of the industry standard 3-pin
TO-220 power package. The LT1584 is available in the
through-hole 3-pin TO-220 power package.
7A, 4.6A, 3A Low Dropout
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1584/LT1585/LT1587 are low dropout three-
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
Adjustable and Fixed
Dropout Voltage vs Output Current
0
Positive Regulators
LT1584/LT1585/LT1587
U
OUTPUT CURRENT (A)
Fast Response
1585 TA02
I
FULL LOAD
158457a
1

Related parts for LT1584-3.3

LT1584-3.3 Summary of contents

Page 1

... Low Voltage Logic Supplies Battery-Powered Circuitry Post Regulator for Switching Supply LT1585/7CM, LT1584/5/7CT LT1585/7CM-3.3, LT1584/5/7CT-3.3 LT1585CM-3.38, LT1584/5CT-3.38 LT1585/7CM-3.45, LT1584/5/7CT-3.45 LT1585/7CM-3.6, LT1584/5/7CT-3.6 U TYPICAL APPLICATIO 3.3V, 7A, 4.6A, 3A Regulator LT1584-3.3 LT1585-3.3 V 4.75V IN LT1587-3 REQUIRED FOR STABILITY LT1584 LT1585/LT1587 NOTE: MICROPROCESSOR APPLICATIONS WITH LOAD TRANSIENTS OF 3.8A REQUIRE OUTPUT DECOUPLING CAPACITANCE > ...

Page 2

... ORDER PART NUMBER FRONT VIEW LT1584CT LT1585CT LT1587CT 2 V OUT 1 ADJ T PACKAGE 3-LEAD PLASTIC TO-220 = 50 C/W JA LT1584CT-3.3 LT1584IT-3.3 LT1585CT-3.3 FRONT VIEW LT1587CT-3 LT1584CT-3.38 LT1585CT-3. OUT LT1584CT-3.45 LT1585CT-3.45 1 GND LT1587CT-3.45 T PACKAGE LT1584CT-3.6 3-LEAD PLASTIC TO-220 LT1585CT-3 C/W JA LT1587CT-3.6 158457a ...

Page 3

... V REF V REF LT1585-3.3 V OUT V OUT LT1585-3.38 V OUT LT1585-3.45 V OUT LT1585-3.6 V OUT LT1584 V REF LT1584-3.3 V OUT LT1584-3.38 V OUT LT1584-3.45 V OUT LT1584-3.6 V OUT < LT1584IT-3.3 T < The denotes the specifications which apply over the full operating = – 3V, 10mA I ...

Page 4

... Load Current Quiescent Current LT1584/5/7-3 LT1584/5-3. LT1584/5/7-3. LT1584/5/7-3 LT1584IT-3 Ripple Rejection LT1584 f = 120Hz, C LT1584-3 120Hz, C LT1584-3. 120Hz, C LT1584-3. 120Hz, C LT1584-3 120Hz, C LT1585 f = 120Hz OUT f = 120Hz OUT LT1585-3 120Hz OUT f = 120Hz OUT LT1585-3. 120Hz, C LT1585-3 ...

Page 5

... Note 3: Line and load regulation are guaranteed up to the maximum power dissipation (25W for the LT1584 in T package, 26.5W for the LT1585 in T package, 18W for the LT1587 in T package). Power dissipation is determined by input/output differential and the output current. Guaranteed ...

Page 6

... LT1587 Load Regulation vs Temperature 0. 0.05 0 –0.05 –0.10 –0.15 –0.20 150 175 –75 –50 – TEMPERATURE ( C) LT1584 • TPC05 100 125 150 175 LT1584 • TPC03 100 125 150 175 LT1584 • TPC03 100 125 150 175 LT1584 • TPC09 158457a ...

Page 7

... V = 3.45V OUT 3. 3.38V 3.40 OUT 3. 3.3V OUT 3.30 3.25 3.20 –75 –50 – 100 125 175 TEMPERATURE ( C) LT1584/5/7 Adjust Pin Current vs Temperature 100 –75 –50 – 100 125 25 50 TEMPERATURE ( C) LT1584 • TPC14 LT1585/7 Maximum Power Dissipation* 30 LT1585 ...

Page 8

... LT1584/LT1585/LT1587 PLIFIED SCHE ATIC V IN GND FOR FIXED VOLTAGE DEVICE 8 + – THERMAL LIMIT ADJ V OUT LT1584 • BD 158457a ...

Page 9

... Current generation microprocessors cycle load current from almost zero to amps in tens of nanoseconds. Output voltage tolerances are tighter and include transient re- sponse as part of the specification. The LT1584/LT1585/ LT1587 family is specifically designed to meet the fast current load-step requirements of these microprocessors and saves total cost by needing less output capacitance in order to maintain regulation ...

Page 10

... As with any IC regulator, exceeding the maximum input-to- output voltage differential causes the internal transistors to break down and none of the protection circuitry is then functional 1N4002 (OPTIONAL) LT1584-3.3 IN OUT V OUT + + C1 C2 GND ...

Page 11

... IN to Figure 4. Connection for Best Load Regulation LT1584/LT1585/LT1587 LT1584 IN OUT + + C1 ADJ V REF ADJ R2/R1 (R2) REF ADJ Figure 3. Basic Adjustable Regulator R P PARASITIC LT1584-3.3 LINE RESISTANCE IN OUT GND LT1585 • F04 V OUT LT1585 • F03 R L 158457a 11 ...

Page 12

... Figure 5. Connection for Best Load Regulation Thermal Considerations The LT1584/LT1585/LT1587 family protects the device under overload conditions with internal power and thermal limiting circuitry. However, for normal continuous load conditions, do not exceed maximum junction temperature ratings important to consider all sources of thermal resistance from junction-to-ambient ...

Page 13

... Please consult “Mounting Considerations for Power Semiconductors” 1990 Linear Applications Handbook, Volume I , Pages RR3-1 to RR3-20. The output connects to the case of all devices in the LT1584/LT1585/LT1587 series. For example, using an LT1585CT-3.3 (TO-220, commer- cial) and assuming: V (Max Continuous) = 5.25V (5V + 5%), V ...

Page 14

... LT1584/LT1585/LT1587 U W PACKAGE I FOR ATIO .060 .256 (1.524) (6.502) .060 .183 (1.524) (4.648) .075 (1.905) .300 (7.620) BOTTOM VIEW OF DD PAK HATCHED AREA IS SOLDER PLATED COPPER HEAT SINK .420 .100 RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN INCH/(MILLIMETER) 2. DRAWING NOT TO SCALE ...

Page 15

... TYP LT1584/LT1585/LT1587 .045 – .055 (1.143 – 1.397) .095 – .115 (2.413 – 2.921) T3 (TO-220) 0801 158457a 15 ...

Page 16

... LT1584/LT1585/LT1587 U TYPICAL APPLICATIONS Guaranteed LT1584/LT1431 Circuit for the Intel 90MHz and 100MHz Pentium Processors (Meets Intel Specifications with Worst-Case Tolerances) 5V SEE NOTE 5 NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTOR VALUES ARE OHMS 1/8W, 5% 220 F 2. ALL CAPACITORS ARE 50V, 20% 10V 3. ALL POLARIZED CAPACITORS ARE AVX ...

Related keywords