19-1348; Rev 0; 4/98
P re c is io n S h u n t Re g u la t o rs w it h Re s e t
in S OT2 3 -3
0/MAX631
________________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ 100µA to 50mA Shunt Current Range
♦ Low Cost
The MAX6330/MAX6331 combine a precision shunt
regulator with a power-on reset function in a single
SOT23-3 package. They offer a low-cost method of
operating small microprocessor (µP)-based systems
from high-voltage sources, while simultaneously pro-
tecting µPs from power-up, power-down, and brownout
conditions.
♦ 3-Pin SOT23 Package
♦ ±1.5% Tolerance on Output Voltage
♦ Three Shunt Voltages Available: 5V, 3.3V, 3.0V
Both active-low (MAX6330) and active-high (MAX6331)
push/pull output versions are available. The output
voltage has ±1.5% tolerance. The MAX6330/MAX6331
operate over a wide shunt current range from 100µA to
50mA, and offer very good transient immunity.
♦ Precision Power-On Reset Threshold:
1.5% Tolerance Available with Either
RESET (MAX6331) or RESET (MAX6330)
Outputs
A 3-pin SOT23 package allows for a significant reduc-
tion in board space and improves reliability compared
to multiple-IC/discrete solutions. These devices have a
minimum order increment of 2,500 pieces.
♦ 140ms Reset Timeout Period—No External
Components Required
_______________Ord e rin g In fo rm a t io n
________________________Ap p lic a t io n s
PART*
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
3 SOT23-3
Controllers
MAX6330_UR-T
MAX6331_UR-T
Household Appliances
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Size-Sensitive Equipment
Automotive
3 SOT23-3
*Insert the desired suffix letter (from the table below) into the
blank to complete the part number. These devices have a mini-
mum order increment of 2,500 pieces.
SOT
TOP MARK
RESET
SHUNT
SUFFIX THRESHOLD REGULATOR
MAX6330 MAX6331
(V)
VOLTAGE (V)
L
T
S
4.63
3.06
2.78
5.0
3.3
3.0
EKAA
EMAA
EDAA
ELAA
ENAA
EPAA
____________Typ ic a l Op e ra t in g Circ u it
___________________P in Co n fig u ra t io n
R
S
V
SHUNT
V
IN
I
LOAD
C
0.1µF*
TOP VIEW
L
I
SHUNT
I
IN
V
CC
SHUNT
1
2
GND
µP
MAX6330
MAX6331
RESET
INPUT
MAX6330
MAX6331
RESET
(RESET)
SHUNT
3
RESET
(RESET)
GND
GND
SOT23-3
*SEE THE SECTION CHOOSING THE BYPASS CAPACITOR (C )
( ) ARE FOR THE MAX6331
L
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.