MAX6330_05 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Precision Shunt Regulators with Reset in SOT23-3

19-1348; Rev 1; 12/05
Precision Shunt Regulators with Reset
in SOT23-3
________________General Description
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.
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.
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.
________________________Applications
Controllers
Household Appliances
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Size-Sensitive Equipment
Automotive
____________Typical Operating Circuit
V_IN ^{RS VSHUNT}
I_IN
I_SHUNT
SHUNT
I_LOAD
MAX6330
MAX6331
RESET
(RESET)
GND
C_L
0.1µF*
V_CC
µP
RESET
INPUT
GND
*SEE THE SECTION CHOOSING THE BYPASS CAPACITOR (C_L)
____________________________Features
♦ 100µA to 50mA Shunt Current Range
♦ Low Cost
♦ 3-Pin SOT23 Package
♦ ±1.5% Tolerance on Output Voltage
♦ Three Shunt Voltages Available: 5V, 3.3V, 3.0V
♦ 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
_______________Ordering Information
PART*
MAX6330_UR-T
MAX6331_UR-T
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
3 SOT23-3
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.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
RESET
SHUNT
SUFFIX THRESHOLD REGULATOR
SOT
TOP MARK
(V)
VOLTAGE (V) MAX6330 MAX6331
L
4.63
T
3.06
S
2.78
5.0
EKAA ELAA
3.3
EMAA ENAA
3.0
EDAA EPAA
___________________Pin Configuration
TOP VIEW
GND 1
MAX6330
MAX6331
3 SHUNT
RESET 2
(RESET)
SOT23-3
( ) ARE FOR THE MAX6331
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.