MAX1806 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 500mA, Low-Voltage Linear Regulator in UMAX

19-2018; Rev 0; 4/01
500mA, Low-Voltage Linear Regulator in µMAX
General Description
The MAX1806 low-dropout linear regulator operates
from a +2.25V to +5.5V supply and delivers a guaran-
teed 500mA load current with low 175mV dropout. The
high-accuracy (±1%) output voltage is preset at an
internally trimmed voltage (see Selector Guide) or can
be adjusted from +0.8V to +4.5V with an external resis-
tive-divider.
An internal PMOS pass transistor allows low 210µA
supply current, making this device ideal for portable
equipment such as personal digital assistants (PDAs),
cellular phones, cordless phones, and other equip-
ment, including base stations and docking stations.
Other features include an active-low, power-OK output
that indicates when the output is out of regulation, a
0.02µA shutdown mode, short-circuit protection, and
thermal shutdown protection. The MAX1806 comes in a
miniature 1.3W, 8-pin power-µMAX package with a
metal pad on the underside of the package.
Applications
Notebook Computers
Cellular and Cordless Telephones
PDAs
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
Features
o Guaranteed 500mA Output Current
o Output Down to 0.8V
o Low 175mV Dropout at 500mA
o ±1% Output Voltage Accuracy
Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V
Adjustable from 0.8V to 4.5V
o Power-OK Output
o Low 210µA Ground Current
o 0.02µA Shutdown Current
o Thermal Overload Protection
o Output Current Limit
o Tiny 1.3W, 8-Pin Power-µMAX Package
Ordering Information
PART
MAX1806EUA_ _
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
8 Power-µMAX
PART AND SUFFIX
MAX1806EUA33
MAX1806EUA25
MAX1806EUA18
MAX1806EUA15
MAX1806EUA08
Selector Guide
V_OUT (V)
3.3
2.5
1.8
1.5
0.8
TOP MARK
AAAG
AAAH
AAAI
AAAJ
AAAK
Typical Operating Circuit
Pin Configuration
V_IN
+2.25V TO +5.5V
NINC
OUT
C_IN
1µF
MAX1806
ON
SHDN
POK
OFF
SET
GND
V_OUT
0.8V TO 4.5V
C_OUT
10µF
R_POK
100kΩ
TO
µC
TOP VIEW
IN 1
IN 2
POK 3
SHDN 4
MAX1806
8 OUT
7 OUT
6 SET
5 GND
µMAX
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