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www.semtech.com
EZ1588
2.0A Low Dropout
Positive Voltage Regulators
POWER MANAGEMENT
Revision 1, November 2000
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Low dropout performance: 1.3V max.
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Full current rating over line and temperature
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Fast transient response
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2% total output regulation over line, load
and temperature
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Adjust pin current max. 90A over temperature
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Fixed/adjustable output voltage
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Line regulation typically 0.005%
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Load regulation typically 0.05%
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TO-220 or TO-263 packages
The EZ1588 is a high performance positive voltage
regulator designed for use in applications requiring low
dropout performance at 2A. Additionally, the EZ1588
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.
The EZ1588 series are three terminal regulators with
fixed and adjustable voltage options available in popular
packages.
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Memory supplies
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Graphics core supplies
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2.5V to 3.6V microprocessor supplies
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Low voltage logic supplies
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Battery-powered circuitry
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Post regulator for switching supply
Description
Features
Applications
Fixed Voltage Regulator
Adjustable Voltage Regulator
Typical Application Circuit
VIN > 4.75V
VOUT = 3.45V
VOUT = 3.3V
VIN > 4.75V
U1
EZ1588
1
2
3
ADJ
OUT
IN
TAB
+
C2
10uF Tant. Min.
R1
133 Ohm, 1%
+
C1
10uF Tant.
U1
EZ1588-3.3
1
2
3
GND
OUT
IN
TAB
R2
232 Ohm, 1%
+
C1
10uF Tant.
+
C2
10uF Tant. Min
Notes:
(1) C1 needed if device is far from filter capacitors
(2) C2 minimum value required for stability
2
R
I
1
R
2
R
1
V
V
ADJ
REF
OUT
+
+
=
3
2000 Semtech Corp.
www.semtech.com
EZ1588
POWER MANAGEMENT
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Notes:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2) DV
OUT
, DV
REF
= 1%
(3) Bandwidth of 10 Hz to 10 kHz.
(4) 120 Hz input ripple, (C
ADJ
for ADJ = 25F).
(5) Over Temp. (O.T.) = over specified operating junction temperature range.
Electrical Characteristics (Cont.)
Unless otherwise specified: Adj. V
IN
= 2.75 to 7.0V and Adj. I
O
= 10mA to 2.0A; Fixed V
IN
= 4.75 to 7.0V and Fixed I
O
= 0mA to 2.0A
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