19-3188; Rev 1; 4/04
1 .4 2 5 V t o 3 .6 V In p u t , 1 A,
0 .2 V Dro p o u t LDO Re g u la t o rs
x
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX8516/MAX8517/MAX8518 low-dropout linear
regulators operate from input voltages as low as 1.425V
and are able to deliver up to 1A of continuous output
current with a maximum dropout voltage of only 200mV.
♦ 1.425V to 3.6V Input Voltage Range
♦ Guaranteed 200mV Dropout at 1A Output Current
♦ ±1.4% Output Accuracy Over Load, Line, and
Temperature (0°C to +85°C), ±0.6% Initial Accuracy
♦ Compatible with Ceramic Capacitors
The output voltage can be set from 0.5V to (V - 0.2V)
IN
and is 1.4% accurate over load and line variations, from
0°C to +85°C.
♦ Fast Transient Response
These regulators use small, 1µF ceramic input capaci-
tors and 4.7µF ceramic output capacitors to deliver 1A
output current. High bandwidth provides excellent tran-
sient response and limits the output voltage deviation to
45mV for a 20mA to 1A load step, with only a 4.7µF
ceramic output capacitor, and the voltage deviations can
be reduced further by increasing the output capacitor.
♦ 320µA Operating Supply Current
♦ <25µA Shutdown Supply Current
♦ Short-Circuit Protection
♦ Thermal-Overload Protection
♦ Soft-Start Limits Inrush Current
Designed with an internal p-channel MOSFET pass
transistor, the MAX8516/MAX8517/MAX8518 feature
low 340µA (typ) supply current during dropout condi-
tions. Soft-start reduces inrush current. Other features
include a logic-controlled shutdown mode, short-circuit
protection, and thermal-overload protection.
Ord e rin g In fo rm a t io n
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 µMAX
MAX8516EUB
MAX8517EUB
MAX8518EUB
10 µMAX
The MAX8517 features a power-OK (POK) output that
transitions high when the regulator output is within
± 10% of its nomina l outp ut volta g e . The MAX8518
features a 150ms power-on reset output.
The parts are packaged in a 10-pin µMAX® package that
includes an exposed pad for optimal power dispation.
10 µMAX
Typ ic a l Op e ra t in g Circ u it
INPUT
1.425V TO 3.6V
OUTPUT
0.5V TO (V - 0.2V), 1A
IN
IN_
OUT_
1µF
Ap p lic a t io n s
MAX8516
MAX8517
MAX8518
Servers
Post Regulators
Notebooks
PDAs
POWER-ON RESET
POWER-OK
4.7µF
Storage
POR (MAX8518)
POK (MAX8517)
EN
FB
Networking
Base Stations
Optical Modules
ATE
ON
GND
OFF
µMAX is a registered trademark of Maxim Integrated Products, Inc.
P in Co n fig u ra t io n s
TOP VIEW
EN
IN
1
2
3
4
5
10 N.C.
EN
IN
1
2
3
4
5
10 N.C.
EN
IN
1
2
3
4
5
10 N.C.
9
8
7
6
OUT
OUT
FB
9
8
7
6
OUT
OUT
FB
9
8
7
6
OUT
OUT
FB
MAX8516
MAX8517
MAX8518
IN
IN
IN
N.C.
N.C.
POK
N.C.
N.C.
POR
GND
GND
GND
µMAX
µMAX
µMAX
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.