MAX1792EUA18 maxim 美信芯片 电子元器件中文版规格手册.pdf
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MAX1792
500mA Low-Dropout
Linear Regulator in µMAX
19-1699; Rev 2; 11/11
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
General Description
The MAX1792 low-dropout linear regulator operates
from a +2.5V to +5.5V supply and delivers a guaran-
teed 500mA load current with low 130mV dropout. The
high-accuracy (±1%) output voltage is preset at an
internally trimmed voltage (see
Selector Guide
) or can
be adjusted from 1.25V to 5.0V with an external resis-
tive divider.
An internal PMOS pass transistor allows the low 80µA
supply current to remain independent of load, making
this device ideal for portable battery-operated equip-
ment such as personal digital assistants (PDAs), cellu-
lar phones, cordless phones, base stations, and
notebook computers.
Other features include an active-low open-drain reset
output with a 4ms timeout period that indicates when
the output is out of regulation, a 0.1µA shutdown mode,
short-circuit protection, and thermal shutdown protec-
tion. The device is available in a miniature 1.3W, 8-pin
power-µMAX package with a metal pad on the under-
side of the package.
________________________Applications
Notebook Computers
Cellular and Cordless Telephones
Personal Digital Assistants (PDAs)
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
Features
o Guaranteed 500mA Output Current
o Low 130mV Dropout at 500mA
o Up to ±1% Output Voltage Accuracy
Preset at 1.5V, 1.8V, 2.5V, 3.3V, or 5.0V
Adjustable from 1.25V to 5.0V
o Reset Output with 4ms Timeout Period
o Low 80µA Ground Current
o 0.1µA Shutdown Current
o Thermal Overload Protection
o Output Current Limit
o Tiny 1.3W Power-µMAX Package
POWER-µMAX
SET
GND
+
EP
SHDN
1
2
8
7
OUT
OUTIN
RST
IN
TOP VIEW
3
4
6
5
MAX1792
Pin Configuration
NC
MAX1792
IN
IN
C
IN
1µF
C
OUT
3.3µF
R
RST
100k
V
IN
= +2.5V TO +5.5V
ON
OFF
SHDN
OUT
V
OUT
OUT
RST
GNDSET
TO
µC
Typical Operating Circuit
Ordering Information
Selector Guide
PART AND SUFFIX V
OUT
μMAX TOP MARK
MAX1792EUA15+ 1.5V or Adj. AAAE
MAX1792EUA18+ 1.8V or Adj. AAAA
MAX1792EUA25+ 2.5V or Adj. AAAB
MAX1792EUA33+ 3.3V or Adj. AAAC
MAX1792EUA50+ 5.0V or Adj. AAAD
MAX1792EUA33/V+ 3.3V or Adj. AACP
PART* TEMP RANGE PIN-PACKAGE
MAX1792EUA_ _+ -40° C to +85°C 8 Power-μMAX
MAX1792EUA_ _/V+ -40° C to +85°C 8 Power-μMAX
*
Insert the desired two-digit suffix (see Selector Guide) into the
blanks to complete the part number.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Contact factory for other preset output voltages.
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