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www.semtech.com
EZ1584C & EZ1584I
7.0 Amp Low Dropout
Positive Voltage Regulators
POWER MANAGEMENT
Revision 2, December 2000
The EZ1584 is a high performance positive voltage
regulator designed for use in applications requiring low
dropout performance at 7A. Additionally, the EZ1584
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 EZ1584 is an excellent choice for powering
microprocessor systems. Using an LDO eliminates
MOSFETs and inductors, saving both space and cost. An
LDO also provides better transient response and no
ripple.
A variety of options are available for maximum flexibility:
the EZ1584C is intended for commercial applications and
has both fixed and adjustable voltage options; the
EZ1584I is intended for industrial applications and has
a 3.3V fixed and an adjustable option. All devices are
available in the popular TO-220 package.
K
Memory supply
K
Graphics core supply
K
Other 2.5V to 3.6V microprocessor supplies
K
Low voltage logic supplies
K
Battery-powered circuitry
K
Post regulator for switching supply
K
Telecom supplies
K
Industrial supplies
K
Low dropout performance: 1.3V max. for EZ1584C
and 1.4V max. for EZ1584I
K
Full current rating over line and temperature
K
Fast transient response
K
2% total output regulation over line, load and
temperature
K
Adjust pin current max 90A over temperature
K
Fixed/adjustable output voltage
K
Line regulation typically 0.015%
K
Load regulation typically 0.05%
K
Industrial temperature range (EZ1584I)
K
TO-220 package
Description
Features
Applications
Fixed Voltage Regulator
Adjustable Voltage Regulator
Typical Application Circuit
VIN > 4.75V
VOUT = 3.45V
VOUT = 3.3V
VIN > 4.75V
U 1
EZ1584
1
2
3
A D J
O U T
IN
T A B
+
C 2
10uF Tant. Min.
R 1
133 Ohm, 1%
+
C 1
10uF Tant.
U 1
EZ1584-3.3
1
2
3
G N D
O U T
IN
T A B
R 2
232 Ohm, 1%
+
C 1
10uF Tant.
+
C 2
10uF Tant. Min
Notes:
(1) C1 needed if device is far from filter capacitors
(2) C2 minimum value required for stability
2
R
I
1
R
2
R
1
V
V
ADJ
REF
OUT
+
+
=
3
2000 Semtech Corp.
www.semtech.com
EZ1584C & EZ1584I
POWER MANAGEMENT
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 = 25F).
Electrical Characteristics (Cont.)
Unless otherwise specified: Adj. V
IN
= 2.75V to 7.0V and Adj. I
O
= 10mA to 7.0A; Fixed V
IN
= 4.75 to 7.0V and Fixed I
O
= 0 mA to 7.0A.
Values in bold apply over full operating ambient temperature range.
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2000 Semtech Corp.
www.semtech.com
EZ1584C & EZ1584I
POWER MANAGEMENT
Pin Configuration
Ordering Information
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Notes:
(1) Where X.X denotes voltage options. Available voltages
are: 1.5V, 2.5V, 3.3V and 3.45V for EZ1584C and 3.3V
only for EZ1584I. Leave blank for adjustable version (1.3V
to 5.7V). Contact factory for additional voltage options.
(2) Where C and I denote Commercial (0C to 70C)
and Industrial (-40C to 85C) ambient temperature
ranges.
(3) Only available in tube packaging. A tube contains 50
devices.
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Pin Descriptions
Block Diagram
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