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www.semtech.com
EZ1083
7.5A Positive
Voltage Regulator
POWER MANAGEMENT
Revision 5, May 2003
The EZ1083 is a high performance positive voltage
regulator designed for use in applications requiring low
dropout performance at 7.5A. Additionally, the EZ1083
series provides excellent regulation over variations in line,
load and temperature.
Features include 1.4V dropout at 7.5 amps, fast
transient response, internal current limiting and thermal
shutdown protection of the output device. The EZ1083
has both fixed and adjustable voltage options. These
devices are available in the popular TO-220 package.
The EZ1083 is used in industrial systems to provide power
to microprocessors and chipsets. It is also used to power
ASICs in control systems for medical applications.
Low dropout performance: 1.4V max. for EZ1083
Full current rating over line and temperature
Fast transient response
Adjust pin current max 90A over temperature
Fixed/adjustable output voltage (EZ1083)
Line regulation typically 0.015%
Load regulation typically 0.05%
2% total output regulation over line, load
and temperature
TO-220 package
PC Motherboards
Microcontroller systems
Medical equipment
Low power microprocessor systems
Post regulation for switching power supplies
Telecommunication systems
Description
Features
Applications
Fixed Voltage Regulator
Adjustable Voltage Regulator
Typical Application Circuit
VIN > 4.75V
VOUT = 3.45V
VOUT = 3.3V
VIN > 4.75V
U1
EZ1083
1
2
3
ADJ
OUT
IN
TAB
+
C2
10uF Tant. Min.
R1
133 Ohm, 1%
+
C1
10uF Tant.
U1
EZ1083-3.3
1
2
3
GND
OUT
IN
TAB
R2
232 Ohm, 1%
+
C1
10uF Tant.
+
C2
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
+
+
=
2
2003 Semtech Corp.
www.semtech.com
EZ1083
POWER MANAGEMENT
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Unless otherwise specified: Adj. V
IN
= 2.75V to 7.0V and Adj. I
O
= 10mA to 7.5A; Fixed V
IN
= 4.75 to 7.0V and Fixed I
O
= 0 mA to 7.5A
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Absolute Maximum Ratings
Electrical Characteristics
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified
in the Electrical Characteristics section is not implied.
3
2003 Semtech Corp.
www.semtech.com
EZ1083
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).
(5) Over Temp. (O.T.) = over specified operating junction temperature range.
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Electrical Characteristics (Cont.)
5
2003 Semtech Corp.
www.semtech.com
EZ1083
POWER MANAGEMENT
Outline Drawing - TO-220
Semtech Corporation
Power Management Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
Contact Information
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