Datasheet Linear Technology LT1585

Manufacturer	Linear Technology
Series	LT1585

7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed

Datasheets

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7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed

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Prices

Packaging

	LT1585CM#PBF	LT1585CM#TRPBF	LT1585CM-3.3#PBF	LT1585CM-3.3#TRPBF	LT1585CM-3.38#PBF	LT1585CM-3.45#PBF	LT1585CM-3.45#TRPBF	LT1585CM-3.6#PBF	LT1585CT#PBF	LT1585CT-3.3#PBF	LT1585CT-3.38#PBF	LT1585CT-3.45#PBF	LT1585CT-3.6#PBF
N	1	2	3	4	5	6	7	8	9	10	11	12	13
Package	DDPAK-3 Package Outline Drawing	DDPAK-3 Package Outline Drawing	DDPAK-3 Package Outline Drawing	DDPAK-3 Package Outline Drawing	DDPAK-3 Package Outline Drawing	DDPAK-3 Package Outline Drawing	DDPAK-3 Package Outline Drawing	DDPAK-3 Package Outline Drawing	TO-220 Package Outline Drawing	TO-220 Package Outline Drawing	TO-220 Package Outline Drawing	TO-220 Package Outline Drawing	TO-220 Package Outline Drawing
Package Code	M	M	M	M	M	M	M	M	T	T	T	T	T
Package Index	05-08-1460	05-08-1460	05-08-1460	05-08-1460	05-08-1460	05-08-1460	05-08-1460	05-08-1460	05-08-1420	05-08-1420	05-08-1420	05-08-1420	05-08-1420
Pin Count	3	3	3	3	3	3	3	3	3	3	3	3	3

Parametrics

Parameters / Models	LT1585CM#PBF	LT1585CM#TRPBF	LT1585CM-3.3#PBF	LT1585CM-3.3#TRPBF	LT1585CM-3.38#PBF	LT1585CM-3.45#PBF	LT1585CM-3.45#TRPBF	LT1585CM-3.6#PBF	LT1585CT#PBF	LT1585CT-3.3#PBF	LT1585CT-3.38#PBF	LT1585CT-3.45#PBF	LT1585CT-3.6#PBF
Demo Boards	DC065A-B	DC065A-B	DC065A-B	DC065A-B	DC065A-B	DC065A-B	DC065A-B	DC065A-B	DC065A-B	DC065A-B	DC065A-B	DC065A-B	DC065A-B
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Discrete Pass Element	no	no	no	no	no	no	no	no	no	no	no	no	no
Dropout Voltage, V	1.1	1.1	1.1	1.1	1.1	1.1	1.1	1.1	1.1	1.1	1.1	1.1	1.1
Export Control	no	no	no	no	no	no	no	no	no	no	no	no	no
Isupply, mA	8	8	8	8	8	8	8	8	8	8	8	8	8
Max Junction Temp, Deg	150	150	150	150	150	150	150	150	150	150	150	150	150
Number of Outputs	1	1	1	1	1	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70
Output Current, A	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6
Output Voltage	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6	Adj, 1.5, 3.3,3.38, 3.45, 3.6
Theta JA	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)	30В°C/W (M), 50В°C/W (T)
Type	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN
Vin Max, V	7	7	7	7	7	7	7	7	7	7	7	7	7
Vin Min, V	2.35	2.35	2.35	2.35	2.35	2.35	2.35	2.35	2.35	2.35	2.35	2.35	2.35
Vout Max, V	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5
Vout Min, V	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25

Eco Plan

	LT1585CM#PBF	LT1585CM#TRPBF	LT1585CM-3.3#PBF	LT1585CM-3.3#TRPBF	LT1585CM-3.38#PBF	LT1585CM-3.45#PBF	LT1585CM-3.45#TRPBF	LT1585CM-3.6#PBF	LT1585CT#PBF	LT1585CT-3.3#PBF	LT1585CT-3.38#PBF	LT1585CT-3.45#PBF	LT1585CT-3.6#PBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Other Options

LT1584 LT1584 LT1587 LT1587

Application Notes

Download
Linear Technology Magazine Circuit Collection, Volume II &mdash AN66
PDF, 1.1 Mb, File published: Aug 1, 1996
Application Note 66 is a compendium of "power circuits" from the first five years of Linear Technology. This application note contains circuits that can power most any system you can imagine, from desktop computer systems to micropower systems for portable and handheld equipment. Also included here are circuits that provide 300W or more of power factor corrected DC from a universal input. Battery chargers are included, some that charge several battery types, some that are optimized to charge a single type. MOSFET drivers, high side switches and H-bridge driver circuits are also included, as is an article on simple thermal analysis.
Extract from the document
Application Note 66
August 1996 Linear Technology Magazine Circuit Collection, Volume II
Power Products
Richard Markell, Editor
INTRODUCTION
Application Note 66 is a compendium of вЂњpower circuitsвЂќ
from the first five years of Linear Technology. The objective
is to collect the useful circuits from the magazine into
several applications notes (another, AN67, will collect
signal processing circuits into one Application Note) so
that valuable вЂњgemsвЂќ will not be lost. This Application Note
contains circuits that can power most any system you can
imagine, from desktop computer systems to micropower
systems for portable and handheld equipment. Also included here are circuits that provide 300W or more of
power factor corrected DC from a universal input. Battery
chargers are included, some that charge several battery
types, some that are optimized to charge a single type.
MOSFET drivers, high side switches and H-bridge driver
circuits are also included, as is an article on simple thermal
analysis. With these introductory remarks, IвЂ™ll stand aside
and let the authors describe their circuits. ARTICLE INDEX
REGULATORSвЂ”SWITCHING (BUCK)
High Power (>4A) …

Design Notes

Download
Dual Regulators Power PentiumВ® Processor or Upgrade CPU &mdash DN122
PDF, 73 Kb, File published: Feb 1, 1996
Extract from the document
advertisement Dual Regulators Power Pentium Processor or Upgrade CPU
Design Note 122
Craig Varga
Many manufacturers of Pentium processor-based
motherboards have been searching for an economical
solution to the problem of powering the present generation Pentium P54C and accommodating the upgrade
processors that will soon become available. The existing
processor uses a single supply for both the processor
core and the I/O. For the highest frequency offerings,
the supply required is 3.5V В±100mV (VRE speciп¬Ѓcation).
For the lower performance end of the clock frequency
spectrum, a supply voltage of 3.3V В±5% is adequate.
Recently, Intel respeciп¬Ѓed the standard 3.3V CPUs for
operation at 3.5V. This allows designs for any clock
frequency to be operated from a single 3.5V supply. The
I/O ring and chipset should be powered by the same
voltage as the CPU core, whether that is 3.3V or 3.5V.
The P55C upgrade processor, which will soon be available, requires separate supplies for the core and the I/O.
The nominal core voltage is targeted at 2.500V В±5%,
whereas the I/O supply is still nominally 3.3V. There is
also a processor pin, VCC2DET, at location AL1, that is
bonded to ground on the P55C, but is open on the P54C.
A signiп¬Ѓcant complication is introduced by the core …
Download
Fast Regulator Paces High Performance Processors &mdash DN87
PDF, 85 Kb, File published: Oct 1, 1994
Extract from the document
advertisement Fast Regulator Paces High Performance Processors
Design Note 87
Mitchell Lee and Craig Varga
New high performance microprocessors require a
fresh look at power supply transient response. Pentium
processors, for example, have current demands that go
from a low idle mode of 200mA to a full load current of
4A in 20ns. A transition of the same magnitude occurs
as the processor reenters its power saving mode. In
addition, the overall supply tolerances have been narrowed signiп¬Ѓcantly from the traditional В±5% for 5V
supplies and include transient conditions. When all
possible DC error terms are accounted for, the transient
response of the power supply when subject to the load
step mentioned above must be within В±46mV!
To address this problem Linear Technology has developed the LTВ®1585 linear regulator. It features 1% initial
accuracy, excellent temperature drift and load regulation,
and virtually perfect line regulation. Complementing superb DC characteristics, the LT1585 exhibits extremely
fast response to transients. The regulator is offered as
an adjustable regulator requiring two resistors to set the
operating point, as well as п¬Ѓxed versions which have
been trimmed and optimized for 3.3V, 3.38V, 3.45V,
and 3.6V outputs. Fixed versions are fully speciп¬Ѓed for
worst-case DC error bounds; in adjustable designs the …
Download
High Efficiency Power Sources for Pentium TM Processors &mdash DN90
PDF, 85 Kb, File published: Nov 1, 1994
Extract from the document
advertisement High Efficiency Power Sources for Pentium Processors
Design Note 90
Craig Varga
When the processor draws large transient currents,
the 5V supply will be perturbed. In all вЂњbuckвЂќ type
switching regulators there is an inductor in the path
between the raw input supply and the load. This has
the effect of limiting the rise time of the input currents
and minimizing the disturbance to the 5V supply.
However, the typical cheap off-line вЂњbrickвЂќ supply has
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered
trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
100
5VIN
90
EFFICIENCY (%) In many applications, particularly portable computers,
the efп¬Ѓciency of power conversion is critical both from
the standpoint of battery life and thermal management.
Desktop machines may also beneп¬Ѓt from higher efп¬Ѓciency, particularly a вЂњgreen PC.вЂќ While linear regulators
can offer low cost and high performance solutions, they
can only offer 67% efп¬Ѓciency in 5V to 3.3V applications.
Switching regulators are more efп¬Ѓcient and minimize …
Download
5V to 3.3V Circuit Collection &mdash DN91
PDF, 74 Kb, File published: Nov 1, 1994
Extract from the document
advertisement 5V to 3.3V Circuit Collection вЂ“ Design Note 91
Richard Markell and Craig Varga
High Efп¬Ѓciency 3.3V Regulator
INPUT
VOLTAGE
5V + 6
VIN
7
3 IPGM SHDN 8 3.3V Battery-Powered Supply with Shutdown
8 3w
22ОјF*
25V LBIN 50ОјHвЂ GND 1N5818 + 2w
47ОјF**
16V 4 * AVX TPSD226K025
** AVX TPSD476K016
вЂ COILTRONICS CTX50-4 OUT 1 LT1121-3.3 5V
5 1
VOUT
LTC1174-3.3
2
5
LBOUT
SW IN 0.1ОјF + 1ОјF …

Model Line

Series: LT1585 (13)

LT1585CM#PBF LT1585CM#TRPBF LT1585CM-3.3#PBF LT1585CM-3.3#TRPBF LT1585CM-3.38#PBF LT1585CM-3.45#PBF LT1585CM-3.45#TRPBF LT1585CM-3.6#PBF LT1585CT#PBF LT1585CT-3.3#PBF LT1585CT-3.38#PBF LT1585CT-3.45#PBF LT1585CT-3.6#PBF

Manufacturer's Classification

Power Management > LDO Linear Regulators > Positive Linear Regulators (LDO)