MAX8526 MAXIM [Maxim Integrated Products], MAX8526 Datasheet

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MAX8526

Manufacturer Part Number
MAX8526
Description
1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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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
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.
19-3190; Rev 1; 5/05
Pin Configurations appear at end of data sheet.
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.
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________________________________________________________________ Maxim Integrated Products
General Description
Applications
0.2V Dropout LDO Regulators
IN
- 0.2V)
1.425V to 3.6V Input, 2A,
♦ 1.425V to 3.6V Input Voltage Range
♦ Guaranteed 200mV Dropout at 2A Output Current
♦ ±0.6% Initial Accuracy
♦ ±1.4% Output Accuracy over
♦ 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
+Denotes lead-free packaging.
MAX8526EUD
MAX8526EUD+
MAX8527EUD
MAX8527EUD+
MAX8528EUD
MAX8528EUD+
Load/Line/Temperature (0°C to +85°C)
OFF
PART
ON
POWER-ON RESET
POWER-OK
2.2µF
1.425V TO 3.6V
INPUT
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
IN_
POR (MAX8528)
POK (MAX8527)
EN
TEMP RANGE
Ordering Information
MAX8526
MAX8527
MAX8528
OUT_
GND
FB
0.5V TO (V
PIN-PACKAGE
14 TSSOP
14 TSSOP
14 TSSOP
14 TSSOP
14 TSSOP
14 TSSOP
Features
OUTPUT
IN
- 0.2V), 2A
10µF
1

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MAX8526 Summary of contents

Page 1

... Rev 1; 5/05 General Description The MAX8526/MAX8527/MAX8528 low-dropout linear regulators operate from input voltages as low as 1.425V and are able to deliver continuous output current with a maximum dropout voltage of only 200mV. The output voltage can be set from 0. and is 1.4% accurate over load and line variations, from 0° ...

Page 2

Input, 2A, 0.2V Dropout LDO Regulators ABSOLUTE MAXIMUM RATINGS IN, EN, POK (MAX8527), POR (MAX8528 GND ........................................................-0.3V to +4.0V OUT to GND ..................................................-0.3V to (IN + 0.3V) Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (T = ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure +1.8V OUT PARAMETER GND V IN GND Supply Current Dropout, V GND Shutdown Current V IN POK (MAX8527 only Power-OK Threshold V HYS POK Output Voltage Low ...

Page 4

... LOAD 300 LOAD 200 100 0 2400 0 0.6 1.2 1.8 2.4 3.0 INPUT VOLTAGE (V) LINE-TRANSIENT RESPONSE (V = 1.8V TO 2.5V 2A) IN OUT MAX8526/27/28 toc06 100µs/div 2000 SHUTDOWN RESPONSE MAX8526/27/28 toc08 V OUT 1V/div I IN 2A/div EN 2V/div 100µs/div 3.6 V OUT 10mV/div AC-COUPLED V IN 500mV/div AC-COUPLED ...

Page 5

... V = +1.8V OUT PSRR vs. FREQUENCY (MAX8526 100mA LOAD -10 0.01 0 FREQUENCY (kHz) OUTPUT RIPPLE VOLTAGE 10µs/div SHORT-CIRCUIT CURRENT 40µs/div _______________________________________________________________________________________ 1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators Typical Operating Characteristics (continued) = +1.5V 2A, C =10µF, C OUT ...

Page 6

... Exposed Pad IN OVERTHERMAL PROTECTION REF SHUTDOWN EN LOGIC MAX8526 MAX8527 MAX8528 GND 6 _______________________________________________________________________________________ NAME Enable Input. Set low to place the device in low-current shutdown mode. Set EN high for normal operation. Regulator Input. V can range from 1.425V to 3.6V. Bypass with a 2.2µ higher ceramic capacitor to GND ...

Page 7

... PNP-based regulators also waste considerable current in dropout when the pass transistor saturates, and use high base-drive currents under large loads. The MAX8526/ MAX8527/MAX8528 do not suffer from these problems and consume only 500µA (typ) of quiescent current under heavy loads, as well as in dropout ...

Page 8

... The MAX8526/ MAX8527/MAX8528 load-transient response graphs (see the Typical Operating Characteristics) show two components of the output response shift from the output impedance due to the load current change, and the transient response ...

Page 9

For the latest package outline information go to www.maxim-ic.com/packages Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in ...

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