MAX8526_09 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators

19-3190; Rev 2; 8/09
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1.425V to 3.6V Input, 2A,
0.2V Dropout LDO Regulators
General Description
The MAX8526/MAX8527/MAX8528 low-dropout linear
regulators operate from input voltages as low as 1.425V
and are able to deliver up to 2A of continuous output
current with a maximum dropout voltage of only 200mV.
The output voltage can be set from 0.5V to (V_IN - 0.2V)
and is 1.4% accurate over load and line variations, from
0°C to +85°C.
These regulators use small, 2.2µF ceramic input capaci-
tors and 10µF ceramic output capacitors to deliver 2A
output current. High bandwidth provides excellent tran-
sient response and limits the output voltage deviation to
45mV for a 20mA to 2A load step, with only a 10µF
ceramic output capacitor, and the voltage deviations can
be reduced further by increasing the output capacitor.
Designed with an internal p-channel MOSFET pass
transistor, the MAX8526/MAX8527/MAX8528 feature
low 500µA typical 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.
The MAX8527 features a power-OK (POK) output that
transitions high when the regulator output is within
±10% of its nominal output voltage. The MAX8528 fea-
tures a 150ms power-on reset (POR) output.
The parts are packaged in a 14-pin TSSOP package,
which includes an exposed pad for optimal power
dissipation.
Applications
Servers
Networking
Storage
Base Stations
Optical Modules
Post Regulators
Notebooks
PDAs
ATE
Pin Configurations appear at end of data sheet.
Features
o 1.425V to 3.6V Input Voltage Range
o Guaranteed 200mV Dropout at 2A Output Current
o ±0.6% Initial Accuracy
o ±1.4% Output Accuracy over
Load/Line/Temperature (0°C to +85°C)
o Compatible with Ceramic Capacitors
o Fast Transient Response
o 440µA Operating Supply Current
o <50µA Shutdown Supply Current
o Short-Circuit Protection
o Thermal-Overload Protection
o Soft-Start Limits Inrush Current
o 5mm x 6.4mm Footprint, 1.1mm Profile
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX8526EUD
-40°C to +85°C 14 TSSOP
MAX8526EUD+
-40°C to +85°C 14 TSSOP
MAX8527EUD
-40°C to +85°C 14 TSSOP
MAX8527EUD+
-40°C to +85°C 14 TSSOP
MAX8527EUD/V+ -40°C to +85°C 14 TSSOP
MAX8528EUD
-40°C to +85°C 14 TSSOP
MAX8528EUD+
-40°C to +85°C 14 TSSOP
+Denotes a lead(Pb)-free RoHS-compliant package.
/V Denotes an automotive qualified part.
Typical Operating Circuit
INPUT
1.425V TO 3.6V
IN_
OUTPUT
0.5V TO (V_IN - 0.2V), 2A
OUT_
2.2µF
MAX8526
MAX8527
10µF
MAX8528
POWER-ON RESET
POR (MAX8528) FB
POWER-OK
POK (MAX8527)
ON
OFF
EN
GND
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.