MAX6330/MAX6331
Precision Shunt Regulators with
Reset in SOT23-3
General Description
Features
● 100µA to 50mA Shunt Current Range
The MAX6330/MAX6331 combine a precision shunt regu-
lator 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 protecting µPs from power-
up, power-down, and brownout conditions.
● Low Cost
● 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
● 140ms Reset Timeout Period—No External
Components Required
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.
Ordering Information
PART*
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
3 SOT23-3
MAX6330_UR-T
MAX6331_UR-T
Applications
3 SOT23-3
● Controllers
● Household Appliances
● Intelligent Instruments
● Critical µP and µC Power Monitoring
● Portable/Size-Sensitive Equipment
*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.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
SHUNT
REGULATOR
VOLTAGE
(V)
SOT
TOP MARK
RESET
THRESHOLD
(V)
SUFFIX
MAX6330 MAX6331
L
T
S
4.63
3.06
2.78
5.0
3.3
3.0
EKAA
EMAA
EDAA
ELAA
ENAA
EPAA
Typical Operating Circuit
R
S
V
SHUNT
V
I
LOAD
IN
Pin Configuration
C
L
I
SHUNT
I
IN
0.1µF*
TOP VIEW
V
CC
SHUNT
MAX6330
MAX6331
µP
1
2
GND
RESET
INPUT
RESET
(RESET)
MAX6330
MAX6331
SHUNT
3
GND
GND
RESET
(RESET)
SOT23-3
*SEE THE SECTION CHOOSING THE BYPASS CAPACITOR (C )
L
(
) ARE FOR THE MAX6331
19-1348; Rev 2; 4/14