EZ1587C_06 Datasheet, PDF (1/6 Pages) Semtech Corporation – 3 Amp Positive Voltage Regulator

POWER MANAGEMENT
Description
The EZ1587 series of high performance positive voltage
regulators are designed for use in applications requiring
low dropout performance at up to 3A. Additionally, the
EZ1587 series provides excellent regulation over
variations in line, load and temperature.
Outstanding features include low dropout performance
at rated current, fast transient response, internal
current limiting and thermal shutdown protection of the
output device.
A variety of options are available for maximum flexibility:
the EZ1587C is intended for commercial applications and
has both fixed and adjustable voltage options; the
EZ1587I is intended for industrial applications and is
adjustable only.
All devices are available in the popular TO-220 and
TO-263 packages.
Typical Application Circuit
EZ1587C & EZ1587I
3 Amp Positive
Voltage Regulator
Features
‹ Low dropout voltage: 1.3V max. for EZ1587C and
1.4V max. for EZ1587I
‹ Full current rating over line and temperature
‹ Fast transient response
‹ ±2% total output regulation over line, load and
temperature
‹ Adjust pin current max 90µA over temperature
‹ Fixed/adjustable output voltage (EZ1587C)
‹ Line regulation typically 0.015%
‹ Load regulation typically 0.05%
‹ Industrial temperature range (EZ1587I)
‹ TO-220 and TO-263 packages. Available in RoHS
compliant package
Applications
‹ Printer and plotter supplies
‹ Instrumentation
‹ Medical equipment
‹ Microcontroller systems
‹ Telecommunication systems
‹ Motherboards
‹ Switching supply post regulation
Fixed Voltage Regulator
VIN > 4.75V
U1
3 _IN
+ _C1
10uF Tant.
EZ1587C-3.3
TAB _OUT 2
GND
1
VOUT = 3.3V
+ _C2
10uF Tant. Min.
Adjustable Voltage Regulator
VIN > 4.75V
U1
3
IN
EZ1587
TAB
2
OUT
+ _C1
10uF Tant.
ADJ
1
Notes:
(1) C1 needed if device is far from filter capacitors
(2) C2 minimum value required for stability
VOUT = 3.45V
R1
133 Ohm, 1%
+ C2
10uF Tant. Min
R2
232 Ohm, 1%
V_OUT
= V_REF
•
1 +

R2
R1


+
I_ADJ
• R2
Revision: April 26, 2006
1
www.semtech.com