EZ1087
5.0A Remote Sense
Voltage Regulator
POWER MANAGEMENT
Description
Features
The EZ1087 is a high performance positive voltage
regulator designed for use in applications requiring low
dropout performance at up to 5A. The device has
remote sense capability to provide an accurate voltage
at the load, compensating for resistive drops due to
connectors, wiring and board trace resistance.
Additionally, the EZ1087 provides excellent regulation
over variations in line, load and temperature.
u Low dropout performance: 1.3V max.
u Kelvin remote sense inputs
u Full current rating over line and temperature
u Fast transient response
u ±2% total output regulation over line, load
and temperature
u Adjust pin current max. 90µA over temperature
u Fixed/adjustable output voltage
u Line regulation typically 0.005%
u Load regulation typically 0.1%
Outstanding features include low dropout performance
at rated current, fast transient response, internal
current limiting and thermal shutdown protection of the u 5-pin TO-220 package
output device.
Applications
The EZ1087 is available in the popular 5-pin TO-220
package.
u GTL+ bus VDDQ
u Graphics controller core voltage
u PCI cards
u DDR VDDQ
Typical Application Circuit
1k
U1
1
5
-S
+S
4
3/TAB
VOUT = 3.45V @ 5A
VIN > 4.75V
INPUT
OUTPUT
+
+
ADJ
2
C1
10uF Tant.
R1
133 1%
C2
10uF Tant. Min.
EZ1087
R2
232 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, December 2000
1
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