Maxim MAX6330SUR-T, MAX6330TUR-T, MAX6330LUR-T, MAX6331LUR-T, MAX6331SUR-T Datasheet

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________________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 pro­tecting 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 reduc­tion 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

____________________________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

MAX6330/MAX6331

Precision Shunt Regulators with Reset

in SOT23-3

________________________________________________________________

Maxim Integrated Products

1

TOP VIEW

RESET

(RESET)

1

GND

( ) ARE FOR THE MAX6331

SHUNT

MAX6330
MAX6331

SOT23-3

2

3

___________________Pin Configuration

____________Typical Operating Circuit

MAX6330
MAX6331

SHUNT

V

SHUNT

I

SHUNT

I

LOAD

V

IN

RESET

(RESET)

RESET
INPUT

GND

V

CC

CL

0.1µF*

GND

µP

*SEE THE SECTION

CHOOSING THE BYPASS CAPACITOR (CL)

I

IN

R

S

19-1348; Rev 0; 4/98

PART*

MAX6330_UR-T
MAX6331_UR-T

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

3 SOT23-3
3 SOT23-3

_______________Ordering Information

*Insert the desired suffix letter (from the table below) into the
blank to complete the part number. These devices have a mini­mum order increment of 2,500 pieces.

SUFFIX

L
T 3.06

4.63

RESET

THRESHOLD

(V)

EKAA

EMAA3.3

5.0

SHUNT
REGULATOR
VOLTAGE (V)

SOT

TOP MARK

ELAA

ENAA

S 3.02.78 EDAA EPAA

MAX6330 MAX6331

MAX6330/MAX6331

Precision Shunt Regulators with Reset
in SOT23-3

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(I

SHUNT

= 1mA, CL= 0.1µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Terminal Voltage (with respect to GND),

All Pins Except SHUNT....................-0.3V to (V

SHUNT

+ 0.3V)

Input Current (I

SHUNT

)........................................................60mA

Output Current (RESET/

RESET)..........................................20mA

Short-Circuit Duration.................................................Continuous

Continuous Power Dissipation

SOT23-3 (derate 4mW/°C above +70°C)....................320mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range.............................-65°C to +160°C

Lead Temperature (soldering, 10sec).............................+300°C

MAX633_L

TA= 0°C to +70°C
TA= -40°C to +85°C

100mV overdrive, CL= 15pF

CONDITIONS

ms100 140 200Reset Pulse Width

µs20V

SHUNT

to Reset Delay

3.25 3.3 3.35

4.85 5.15
V

4.93 5.0 5.07

V

SHUNT

Regulation Voltage

(Note 1)

ppm/°C40Reset Threshold Tempco

V

4.56 4.63 4.69

V

TH

Reset Threshold Voltage

mA50I

SHUNT(max)

Maximum Shunt Current
(Note 3)

µA100 60I

SHUNT(min)

Minimum Shunt Current
(Note 2)

V

1.0

Minimum V

SHUNT

for which

RESET is Valid (MAX6330)

1.2
ppm/°C40V

SHUNT

Tempco

UNITSMIN TYP MAXSYMBOLPARAMETER

V

SHUNT

2.91 3.09

2.96 3.0 3.04

3.20 3.40

TA= -40°C to +85°C

TA= +25°C

TA= +25°C
TA= -40°C to +85°C
TA= +25°C
TA= -40°C to +85°C

TA= +25°C
TA= -40°C to +85°C

I

SHUNT

=

0.1mA to
50mA

4.50 4.75

2.97 3.15

MAX633_T

TA= +25°C
TA= -40°C to +85°C

3.01 3.06 3.11

2.70 2.86

MAX633_S

TA= +25°C
TA= -40°C to +85°C

2.74 2.78 2.82

MAX633_L

MAX633_T

MAX633_S

MAX6330/MAX6331

Precision Shunt Regulators with Reset

in SOT23-3

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(I

SHUNT

= 1mA, CL= 0.1µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

Note 1: It is recommended that the regulation voltage be measured using a 4-wire force-sense technique when operating at high

shunt currents. For operating at elevated temperatures, the device must be derated based on a +150°C maximum allowed
junction temperature and a maximum thermal resistance of 0.25°C/mW junction to ambient when soldered on a printed cir­cuit board. The T

A

= +25°C specification over load is measured using a pulse test at 50mA with less than 5ms on time.

Note 2: Minimum shunt current required for regulated V

SHUNT

.

Note 3: Maximum shunt current required for regulated V

SHUNT

.

Note 4: In a typical application where SHUNT serves as the system voltage regulator, note that both I

SOURCE

for VOHand I

SINK

for

V

OL

come from V

SHUNT

(see the

Typical Operating Circuit

).

CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER

I

SINK

= 1.2mA

MAX6330T/S, V

TH

(min)

I

SINK

= 3.2mA

MAX6330, V

SHUNT

= 1V, I

SINK

= 50µA,

TA= 0°C to +70°C

0.3

MAX6330L, V

TH

(min)

0.3

MAX6331L, V

TH

(max)

MAX6331T/S, V

TH

(max)

0.4

V

OL

RESET/RESET Output
Voltage Low (Note 4)

MAX6330, V

SHUNT

= 1.2V, I

SINK

= 50µA,

TA= -40°C to +85°C

0.3

V

I

SOURCE

= 500µA

MAX6331T/S, V

TH

(min)

I

SOURCE

= 800µA

MAX6331, 1.8V < V

SHUNT

< V

TH(min)

,

I

SOURCE

= 150µA

0.8 x V

SHUNT

MAX6331L, V

TH

(min)

0.8 x V

SHUNT

MAX6330L, V

TH

(max)

MAX6330T/S, V

TH

(max)

0.8 x V

SHUNT

V

OH

RESET/RESET Output
Voltage High (Note 4)

V