EZ1083(B)
7.5A Positive
Voltage Regulator
POWER MANAGEMENT
Description
Features
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.
u Low dropout performance:
1.3V max. for EZ1083,
1.45V max. for EZ1083B
u Full current rating over line and temperature
u Fast transient response
u Adjust pin current max 90µA over temperature
u Fixed/adjustable output voltage (EZ1083)
u Line regulation typically 0.015%
u Load regulation typically 0.05%
u ±2% total output regulation over line, load
and temperature (±2.4% for EZ1083B)
u TO-220 package
Features include 1.3V 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, while the
EZ1083B is adjustable only for cost sensitive
applications. These devices are available in the popular
TO-220 package.
Applications
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.
u PC Motherboards
u Microcontroller systems
u Medical equipment
u Low power microprocessor systems
u Post regulation for switching power supplies
u Telecommunication systems
Typical Application Circuit
Fixed Voltage Regulator
U1
EZ1083-3.3
3
2
TAB
VIN > 4.75V
VOUT = 3.3V
IN
OUT
+
+
C1
10uF Tant.
C2
GND
1
10uF Tant. Min.
Adjustable Voltage Regulator
U1
EZ1083
OUT
3
2
TAB
VIN > 4.75V
VOUT = 3.45V
IN
+
+
C1
10uF Tant.
R1
C2
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
1
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Revision 1, November 2000
