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PDF MAX8528 Data sheet ( Hoja de datos )
| Número de pieza | MAX8528 | |
| Descripción | 1.425V to 3.6V Input 2A 0.2V Dropout LDO Regulators | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-3190; Rev 1; 5/05
EVAALVUAAILTAIOBNLEKIT
www.DataSheet4U.com
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 (VIN - 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
♦ 1.425V to 3.6V Input Voltage Range
♦ Guaranteed 200mV Dropout at 2A Output Current
♦ ±0.6% Initial Accuracy
♦ ±1.4% Output Accuracy over
Load/Line/Temperature (0°C to +85°C)
♦ Compatible with Ceramic Capacitors
♦ Fast Transient Response
♦ 440µA Operating Supply Current
♦ <50µA Shutdown Supply Current
♦ Short-Circuit Protection
♦ Thermal-Overload Protection
♦ Soft-Start Limits Inrush Current
♦ 5mm x 6.4mm Footprint, 1.1mm Profile
Ordering Information
PART
TEMP RANGE
MAX8526EUD
-40°C to +85°C
MAX8526EUD+
-40°C to +85°C
MAX8527EUD
-40°C to +85°C
MAX8527EUD+
-40°C to +85°C
MAX8528EUD
-40°C to +85°C
MAX8528EUD+
-40°C to +85°C
+Denotes lead-free packaging.
PIN-PACKAGE
14 TSSOP
14 TSSOP
14 TSSOP
14 TSSOP
14 TSSOP
14 TSSOP
Typical Operating Circuit
INPUT
1.425V TO 3.6V
IN_
OUTPUT
0.5V TO (VIN - 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/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
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1.425V to 3.6V Input, 2A,
0.2V Dropout LDO Regulators
Typical Operating Characteristics (continued)
(Typical values are: VIN = +1.8V, VOUT = +1.5V, IOUT = 2A, COUT =10µF, CIN = 2.2µF, and TA = +25°C, unless otherwise noted.)
PSRR vs. FREQUENCY (MAX8526)
80
70
60
50
40
30
20
10
0 ILOAD = 100mA
-10
0.01
0.1 1
10 100
FREQUENCY (kHz)
1000
FB VOLTAGE vs. TEMPERATURE
502
501
500
499
498
497
496
495 ILOAD = 20mA
494
-40 -15 10
35
TEMPERATURE (°C)
60
85
OUTPUT RIPPLE VOLTAGE
MAX8526/27/28 toc11
OVERCURRENT THRESHOLD
vs. TEMPERATURE
4.0
3.9
VOUT
1mV/div
AC-COUPLED
3.8
3.7
3.6
10µs/div
SHORT-CIRCUIT CURRENT
MAX8526/27/28 TOC13
3.5
-40
75
-15 10 35 60
TEMPERATURE (°C)
CASE TEMPERATURE
vs. LOAD CURRENT
85
VOUT
1V/div
60
45
40µs/div
IOUT
2A/div
30
15
VIN = 2.5V; TA = +25°C
0
0 400 800 1200 1600
LOAD CURRENT (mA)
2000
_______________________________________________________________________________________ 5
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| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet MAX8528.PDF ] | |
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