MAX1792_11 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 500mA Low-Dropout Linear Regulator in uMAX

19-1699; Rev 2; 11/11
500mA Low-Dropout
Linear Regulator in µMAX
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
Typical Operating Circuit
V_IN = +2.5V TO +5.5V
NINC
OUT
C_IN
1μF
IN
OUT
MAX1792
ON
SHDN
RST
OFF
SET
GND
V_OUT
C_OUT
3.3μF
R_RST
100k
TO
μC
Features
♦ Guaranteed 500mA Output Current
♦ Low 130mV Dropout at 500mA
♦ 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
♦ Reset Output with 4ms Timeout Period
♦ Low 80µA Ground Current
♦ 0.1µA Shutdown Current
♦ Thermal Overload Protection
♦ Output Current Limit
♦ Tiny 1.3W Power-µMAX Package
Ordering Information
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.
Selector Guide
PART AND SUFFIX
MAX1792EUA15+
MAX1792EUA18+
MAX1792EUA25+
MAX1792EUA33+
MAX1792EUA50+
MAX1792EUA33/V+
V_OUT
1.5V or Adj.
1.8V or Adj.
2.5V or Adj.
3.3V or Adj.
5.0V or Adj.
3.3V or Adj.
μMAX TOP MARK
AAAE
AAAA
AAAB
AAAC
AAAD
AACP
Pin Configuration
TOP VIEW
+
IN 1
8 OUT
IN 2
RST 3
MAX1792
7 OUT
6 SET
SHDN 4
EP 5 GND
POWER-μMAX
________________________________________________________________ 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.