EZ1084BC, EZ1084C
& EZ1084I
5 Amp Positive Voltage Regulator
POWER MANAGEMENT
Description
ꢀeatures
The EZ1084 series of high performance positive voltage
regulators are designed for use in applications requiring
low dropout performance at up to 5A. Additionally, the
EZ1084 series provides excellent regulation over
variations in line, load and temperature.
u Low dropout voltage: 1.3V max. for EZ1084C,
1.4V max. for EZ1084I, 1.45V max. for EZ1084BC
u ꢀull current rating over line and temperature
u ꢀast transient response
u ±2% total output regulation over line, load and
temperature (±2.4% for EZ1084BC)
Outstanding features include low dropout performance
at rated current, fast transient response, internal
current limiting and thermal shutdown protection of the
output device.
u Adjust pin current max 90µA over temperature
u ꢀixed/adjustable output voltage (EZ1084C)
u Line regulation typically 0.015%
u Load regulation typically 0.05%
u Industrial temperature range (EZ1084I)
u TO-220 and TO-263 packages
A variety of options are available for maximum flexibility:
the EZ1084C has both fixed and adjustable voltage
options and is designed for use in commercial
applications; the EZ1084BC is adjustable only for cost
sensitive commercial applications; the EZ1084I is
adjustable only for industrial applications.
Applications
u Printer and plotter supplies
u Instrumentation
u Medical equipment
All devices are available in the popular TO-220 and
TO-263 packages.
u Microcontroller systems
u Telecommunication systems
u Motherboards
u Switching supply post regulation
Typical Application Circuit
ꢀixed Voltage Regulator
U1
EZ1084C-3.3
3
2
TAB
VIN > 4.75V
VOUT = 3.3V
IN
OUT
+
+
C1
10uF Tant.
C2
GND
1
10uF Tant. Min.
Adjustable Voltage Regulator
U1
IN
EZ1084
OUT
3
2
TAB
VIN > 4.75V
VOUT = 3.45V
+
+
C1
R1
C2
10uF Tant.
ADJ
1
133 Ohm, 1%
10uF Tant. Min
R2
232 Ohm, 1%
R2
R1
VOUT = VREF • 1+
+ IADJ • R2
Notes:
(1) C1 needed if device is far from filter capacitors
(2) C2 minimum value required for stability
Revision 1, March, 2001
1
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