EZ1085
3 Amp Positive Voltage Regulator
POWER MANAGEMENT
Description Features
The EZ1085 series of high performance positive voltage
Low dropout voltage: 1.3V max. for EZ1085C,
regulators are designed for use in applications requiring
1.4V max. for EZ1085I
low dropout performance at up to 3A. Additionally, the
Full current rating over line and temperature
EZ1085 series provides excellent regulation over
Fast transient response
variations in line, load and temperature.
2% total output regulation over line, load and
temperature
Outstanding features include low dropout performance
Adjust pin current max 90A over temperature
at rated current, fast transient response, internal
Fixed/adjustable output voltage (EZ1085C)
current limiting and thermal shutdown protection of the
Line regulation typically 0.015%
output device.
Load regulation typically 0.05%
Industrial temperature range (EZ1085I)
A variety of options are available for maximum flexibility:
the EZ1085C has both fixed and adjustable voltage
TO-220 and TO-263 packages. Available in RoHS
options and is designed for use in commercial applica-
compliant package
tions and the EZ1085I is adjustable only for industrial
Applications
applications.
Printer and plotter supplies
All devices are available in the popular TO-220 and
Instrumentation
TO-263 packages.
Medical equipment
Microcontroller systems
Telecommunication systems
Motherboards
Typical Application Circuit
Switching supply post regulation
Fixed Voltage Regulator
U1 EZ1085C-3.3
3 2
TAB
VIN > 4.75V
VOUT = 3.3V
IN OUT
+ +
C1 C2
GND
10uF Tant. 10uF Tant. Min.
1
Adjustable Voltage Regulator
U1 EZ1085
3 2
TAB
VIN > 4.75V VOUT = 3.45V
IN OUT
+ +
C1 R1 C2
10uF Tant. ADJ 133 Ohm, 1% 10uF Tant. Min
1
R2
232 Ohm, 1%
R2
V = V 1+ + I R2
Notes: OUT REF ADJ
R1
(1) C1 needed if device is far from filter capacitors
(2) C2 minimum value required for stability
Revision: January 25, 2006 1 www.semtech.comEZ1085
POWER MANAGEMENT
Absolute Maximum Ratings
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.
Plarameter Smymbo Msaximu Unit
IVnput Supply Voltage 7V
IN
PPower Dissipation IWnternally Limited
D
Thermal Resistance Junction to Case
TO-220 3 C/W
JC
TO-263 3
Thermal Resistance Junction to Ambient
TO-220 50 C/W
JA
TO-263 60
Operating Ambient Temperature Range
EZ1085C T 0 to 70 C
A
EZ1085I -40 to 85
Operating Junction Temperature Range
EZ1085C T 0 to 125 C
J
EZ1085I -40 to 125
STtorage Temperature Range -C65 to 150
STG
LTead Temperature (Soldering) 10 Sec. 3C00
LEAD
EDSD Rating (Human Body Model) E2S kV
Electrical Characteristics
Unless otherwise specified: Adj. V = 2.75V to 7.0V and Adj. I = 10mA to 3A; Fixed V = 4.75 to 7.0V and Fixed I = 0 mA to 3A.
IN O IN O
Values in bold apply over full operating ambient temperature range.
Plarameter SVymbo I MpinTxy Msa Unit
IN O
(1)
Output Voltage V 5AV0Vm 0.985llV 1.015lVlV
O O O O
EZ1085C-X.X 0.98lVlV1.02l l
O O
(1)
Reference Voltage V 5AV110m10.2319.25 1V.26
REF
EZ1085C, EZ1085I 15.225 1.27
(1)
Reference Voltage V 5AV130m10.2317.25 1V.26
RE
(1)
Line Regulation REG 150mA 0.04 0.2 %
(LINE)
(1)
Load Regulation REG55V 0.1 0.4 %
(LOAD)
(1)(2)
Dropout Voltage
EVZ1085C, EZ1085C-X.X 30A 1.2 1.35 V
D
EZ1085I 1.20 1.40
CIurrent Limit 3.04A.5
CL
2006 Semtech Corp. 2 www.semtech.com