MAX1792 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 500mA Low-Dropout Linear Regulator in uMAX

19-1699; Rev 0; 9/00
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
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
Ordering Information
PART*
TEMP RANGE PIN-PACKAGE
MAX1792EUA_ _
-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.
Contact factory for other preset output voltages.
Selector Guide
PART AND
SUFFIX
MAX1792EUA15
MAX1792EUA18
MAX1792EUA25
MAX1792EUA33
MAX1792EUA50
V_OUT
1.5V or Adj.
1.8V or Adj.
2.5V or Adj.
3.3V or Adj.
5.0V or Adj.
µMAX
TOP MARK
AAAE
AAAA
AAAB
AAAC
AAAD
Pin Configuration
TOP VIEW
IN 1
IN 2
RST 3
SHDN 4
MAX1792
8 OUT
7 OUT
6 SET
5 GND
POWER-µMAX
________________________________________________________________ Maxim Integrated Products 1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.