4.6 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATORS
November 22, 1999
EZ1585
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The EZ1585 series of high performance positive
voltage regulators are designed for use in applications
requiring low dropout performance at full rated
current. Additionally, the EZ1585 series provides
excellent regulation over variations in line, load and
temperature.
Outstanding features include low dropout
performance at rated current, fast transient response,
internal current limiting and thermal shutdown
protection of the output device. The EZ1585 series
are three terminal regulators with fixed and adjustable
voltage options available in popular packages.
FEATURES
•
Low dropout performance,
•
•
•
•
•
•
•
•
1.3V max. for EZ1585
Full current rating over line and temperature
Fast transient response
±2% total output regulation over line, load
and temperature
Adjust pin current max 90µA over temperature
Fixed/adjustable output voltage
Line regulation typically 0.015%
Load regulation typically 0.05%
TO-220 or TO-263 packages
ORDERING INFORMATION
APPLICATIONS
•
Pentium
®
Processor supplies
•
PowerPC™ supplies
•
Other 2.5V to 3.6V microprocessor supplies
•
Low voltage logic supplies
•
Battery-powered circuitry
•
Post regulator for switching supply
BLOCK DIAGRAM
DEVICE
EZ1585CM-X.X
EZ1585CT-X.X
PACKAGE
TO-263
(2)
V
OUT
VOLTS
See Note (1)
See Note (1)
TO-220
Notes:
(1) Where X.X denotes voltage options. Available
voltages are: 1.5V, 2.5V, 3.3V and 3.45V. Leave blank
for adjustable version (1.3 to 5.7V). Contact factory for
additional voltage options.
(2) Add suffix ‘TR’ for tape and reel (TO-263).
ABSOLUTE MAXIMUM RATINGS
Parameter
Input Supply Voltage
Power Dissipation
Thermal Resistance
Junction to Case
TO-220
TO-263
Thermal Resistance
Junction to Ambient
TO-220
TO-263
Operating Junction
Temperature Range
Storage Temperature
Range
Lead Temperature
(Soldering) 10 Sec
Symbol
V
IN
P
D
Maximum
7
Internally
Limited
Units
V
W
PIN CONFIGURATIONS
θ
JC
2.5
2.5
°C/W
θ
JA
T
J
T
STG
T
LEAD
50
60
0 to 125
-65 to 150
260
°C/W
°C
°C
°C
1
Pentium Processor is a trademark of Intel Corp. PowerPC is a trademark of IBM Corp.
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
4.6 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATORS
November 22, 1999
EZ1585
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Adj V
IN
= 2.75V to 7.0V and Adj I
O
= 10mA to 4.6A;
Fixed V
IN
= 4.75 to 7.0V and Fixed I
O
= 0 mA to 4.6A
Test Conditions
Parameter
Output Voltage
(1)
Test Limits
T
J
(5)
Symbol
V
O
(1)
V
IN
5V
I
O
10mA
Min
0.99lV
O
l
0.98lV
O
l
1.238
1.225
Typ
V
O
V
O
1.250
1.250
0.015
0.035
0.035
0.05
0.2
1
1.1
Max
1.01lV
O
l
1.02lV
O
l
1.262
1.275
0.2
0.2
0.2
0.3
0.4
Units
V
25°C
O.T.
Fixed Voltage Version
Reference Voltage
(1)
V
REF
REG
(LINE)
5V
10mA
25°C
O.T.
25°C
V
Adj Voltage Version
Line Regulation
%
Fixed Voltage Version
Adj Voltage Version
Load Regulation
(1)
0mA
10mA
REG
(LOAD)
V
D
I
CL
I
Q
T
C
I
ADJ
5V
5V
O.T.
O.T.
25°C
O.T.
%
Dropout Voltage
EZ1585
Current Limit
(2)
25°C
O.T.
O.T.
O.T.
O.T.
25°C
O.T.
4.7
V
1.3
A
13
mA
%/°C
µA
90
7.5
10
0.005
55
Quiescent Current
Fixed Voltage Version
Temperature Coefficient
Adjust Pin Current
Adjust Pin Current
Change
Temperature Stability
Minimum Load Current
Adj Voltage Version
RMS Output Noise
(3)
(4)
∆I
ADJ
T
S
I
O
V
N
R
A
5V
4.6A
5V
5V
0.5A
O.T.
O.T.
O.T.
25°C
O.T.
60
0.2
0.5
5
0.003
72
5
µA
%
10
mA
%V
O
dB
Ripple Rejection Ratio
NOTES:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2)
∆V
OUT
,
∆V
REF
= 1%
(3) Bandwidth of 10 Hz to 10 kHz.
(4) 120 Hz input ripple (C
ADJ
for ADJ = 25µF).
(5) Over Temp. (O.T.) = over specified operating junction temperature range.
2
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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