MAX6331TUR datasheet, PDF - EEWORLD Datasheet

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MAX6331TUR: DescriptionVoltage Reference, 3.3V; CategoryPower/power management The power supply circuit; File Size218KB，8 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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MAX6331TUR Overview

Voltage Reference, 3.3V

MAX6331TUR Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Maxim
Reach Compliance Code	not_compliant
Number of terminals	3
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	0.05 A
Nominal output voltage	3.3 V
Package body material	PLASTIC/EPOXY
Encapsulate equivalent code	TO-236
Certification status	Not Qualified
surface mount	YES
Temperature level	INDUSTRIAL

MAX6331TUR Preview

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.

____________________________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

_______________Ordering Information

PART*

MAX6330_UR-T

MAX6331_UR-T

TEMP. RANGE

-40°C to +85°C

PIN-PACKAGE

3 SOT23-3

________________________Applications

Controllers

Household Appliances

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable/Size-Sensitive Equipment

Automotive

*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.

SOT

RESET

SHUNT

TOP MARK

SUFFIX THRESHOLD REGULATOR

(V)

VOLTAGE (V) MAX6330 MAX6331

____________Typical Operating Circuit

4.63

3.06

2.78

5.0

3.3

3.0

EKAA

EMAA

EDAA

ELAA

ENAA

EPAA

SHUNT

LOAD

0.1µF*

___________________Pin Configuration

TOP VIEW

GND

MAX6330

MAX6331

RESET

(RESET)

GND

µP

RESET

INPUT

MAX6330

MAX6331

GND

RESET

(RESET)

SHUNT

SOT23-3

*SEE THE SECTION

CHOOSING THE BYPASS CAPACITOR

)

( ) ARE FOR THE MAX6331

________________________________________________________________

Maxim Integrated Products

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.

Precision Shunt Regulators with Reset

in SOT23-3

MAX6330/MAX6331

ABSOLUTE MAXIMUM RATINGS

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

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.

ELECTRICAL CHARACTERISTICS

SHUNT

= 1mA, C

= 0.1µF, T

= -40°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MAX633_L

SHUNT

Regulation Voltage

(Note 1)

SHUNT

0.1mA to

50mA

MAX633_T

MAX633_S

Minimum V

SHUNT

for which

RESET

is Valid (MAX6330)

SHUNT

Tempco

Minimum Shunt Current

(Note 2)

Maximum Shunt Current

(Note 3)

SHUNT(min)

SHUNT(max)

MAX633_L

Reset Threshold Voltage

MAX633_T

MAX633_S

Reset Threshold Tempco

SHUNT

to Reset Delay

Reset Pulse Width

100mV overdrive, C

= 15pF

100

= +25°C

= -40°C to +85°C

= +25°C

= -40°C to +85°C

= +25°C

= -40°C to +85°C

4.56

4.50

3.01

2.97

2.74

2.70

140

200

2.78

3.06

4.63

100

= 0°C to +70°C

= -40°C to +85°C

= +25°C

= -40°C to +85°C

= +25°C

= -40°C to +85°C

= +25°C

= -40°C to +85°C

MIN

4.93

4.85

3.25

3.20

2.96

2.91

1.0

1.2

4.69

4.75

3.11

3.15

2.82

2.86

ppm/°C

µs

3.0

3.3

TYP

5.0

MAX

5.07

5.15

3.35

3.40

3.04

3.09

ppm/°C

µA

UNITS

_______________________________________________________________________________________

Precision Shunt Regulators with Reset

in SOT23-3

ELECTRICAL CHARACTERISTICS (continued)

SHUNT

= 1mA, C

= 0.1µF, T

= -40°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER

SYMBOL

SINK

= 3.2mA

SINK

= 1.2mA

RESET/RESET Output

Voltage Low (Note 4)

CONDITIONS

MAX6330L, V

TH(min)

MAX6331L, V

TH(max)

MAX6330T/S, V

TH(min)

MAX6331T/S, V

TH(max)

MIN

TYP

MAX

0.4

0.3

0.8 x V

SHUNT

0.8 x V

SHUNT

0.8 x V

SHUNT

UNITS

MAX6330/MAX6331

MAX6330, V

SHUNT

= 1V, I

SINK

= 50µA,

= 0°C to +70°C

MAX6330, V

SHUNT

= 1.2V, I

SINK

= 50µA,

= -40°C to +85°C

SOURCE

= 800µA

MAX6331L, V

TH(min)

MAX6330L, V

TH(max)

MAX6331T/S, V

TH(min)

MAX6330T/S, V

TH(max)

RESET/RESET Output

Voltage High (Note 4)

SOURCE

= 500µA

MAX6331, 1.8V < V

SHUNT

< V

TH(min)

SOURCE

= 150µA

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 cir-

cuit board. The T

= +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 V

and I

SINK

for

come from V

SHUNT

(see the

Typical Operating Circuit).

_______________________________________________________________________________________

Precision Shunt Regulators with Reset

in SOT23-3

MAX6330/MAX6331

__________________________________________Typical Operating Characteristics

(Typical Operating Circuit, C

= 0.1µF, I

LOAD

= 0mA, T

= +25°C, unless otherwise noted.)

NORMALIZED SHUNT VOLTAGE

vs. SHUNT CURRENT

MAX6330 TOC01

NORMALIZED SHUNT VOLTAGE

vs. TEMPERATURE

MAX6330 TOC02

SHUNT VOLTAGE OVERSHOOT

vs. BYPASS CAPACITANCE (C

)

SHUNT

= 1mA TO 1mA

SHUNT

= 0.1mA TO 5mA

SHUNT

= 5mA TO 50mA

MAX6330 TOC5

1.005

NORMALIZED SHUNT VOLTAGE

1.005

SHUNT

= 50mA

NORMALIZED SHUNT VOLTAGE

SHUNT

= 25mA

1.000

SHUNT

= 1mA

0.995

SHUNT VOLTAGE OVERSHOOT (mV)

= +25°C

1.000

= -40°C

0.995

= +85°C

0.990

0.01

0.1

SHUNT CURRENT (mA)

0.990

-40

-20

TEMPERATURE (°C)

0.0047 0.01

0.1

LOAD CAPACITANCE (µF)

NORMALIZED RESET THRESHOLD

vs. TEMPERATURE

MAX6330 TOC04

POWER-UP RESET TIMEOUT

vs. TEMPERATURE

MAX6330 TOC03

1.010

NORMALIZED RESET THRESHOLD

160

POWER-UP RESET TIMEOUT (ms)

150

140

130

120

110

100

1.005

1.000

0.995

0.990

-40

-20

TEMPERATURE (°C)

-40

-20

TEMPERATURE (°C)

STABILITY BOUNDARY CONDITIONS

MAX6330 TOC06

START-UP TRANSIENT

= 15kΩ

MAX6330 TOC07

RECOMMENDED

CAPACITOR

OPERATING

REGION

UNSTABLE REGION

SHUNT CURRENT (mA)

50V/div

RECOMMENDED

CAPACITOR

RECOMMENDED

CAPACITANCE

SHUNT

2V/div

0.001

0.01

0.1

LOAD CAPACITANCE (µF)

_______________________________________________________________________________________

Precision Shunt Regulators with Reset

in SOT23-3

______________________________________________________________Pin Description

NAME

MAX6330 MAX6331

—

GND

RESET

SHUNT

Ground

Inverting Reset Output.

RESET

remains low while V

SHUNT

is below the reset threshold and

for 140ms after V

SHUNT

rises above the threshold.

Noninverting Reset Output. RESET remains high while V

SHUNT

is below the reset threshold

and for 140ms after V

SHUNT

rises above the threshold.

Regulated Shunt Voltage (+5V, +3.3V, or +3.0V)

FUNCTION

MAX6330/MAX6331

_______________Detailed Description

Reset Output

A microprocessor’s (µP’s) reset input starts the µP in a

known state. The MAX6330/MAX6331 µP supervisory

circuits assert reset to prevent code-execution errors

during power-up, power-down, or brownout conditions.

RESET

is guaranteed to be a logic low for V

SHUNT

1V. Once V

SHUNT

exceeds the reset threshold, an

internal timer keeps

RESET

low for the reset timeout

period; after this interval,

RESET

goes high.

If a brownout condition occurs (V

SHUNT

dips below the

reset threshold),

RESET

goes low. When V

SHUNT

falls

below the reset threshold, the internal timer resets to

zero and

RESET

goes low. The internal timer starts after

SHUNT

returns above the reset threshold, and

RESET

then remains low for the reset timeout period.

The MAX6331 has an active-high RESET output that is

the inverse of the MAX6330’s

RESET

output.

Consider the following information when choosing the

external resistor R

1) The input voltage range, (V

IN)

2) The regulated voltage, (V

SHUNT

)

3) The output current range, (I

LOAD)

Choose R

as follows:

IN(max)

- V

SHUNT (min)

) / (50mA + I

LOAD(min)

)

≤

IN(min)

- V

SHUNT (max)

) / (100µA + I

LOAD(max)

)

Choose the largest nominal resistor value for R

that

gives the lowest current consumption. Provide a safety

margin to incorporate the worst-case tolerance of the

SHUNT

LOAD

SHUNT

Shunt Regulator

The shunt regulator consists of a pass device and a

controlling circuit, as illustrated in Figure 1. The pass

device allows the regulator to sink current while regu-

lating the desired output voltage within a ±1.5% toler-

ance. The shunt current range (I

SHUNT

) is 100µA to

50mA.

The pass transistor in the MAX6330/MAX6331 main-

tains a constant output voltage (V

SHUNT

) by sinking the

necessary amount of shunt current. When I

LOAD

(see

Typical Operating Circuit)

is at a maximum, the shunt

current is at a minimum, and vice versa:

= I

SHUNT

+ I

LOAD

= (V

- V

SHUNT

) / R

GND

( ) ARE FOR MAX6331

RESET

GENERATOR

140ms

TIMEOUT

RESET

(RESET)

MAX6330

MAX6331

1.2V

Figure 1. Functional Diagram

_______________________________________________________________________________________

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MAX6331TUR Related Products

	MAX6331TUR	MAX6331LUR	MAX6331SUR	MAX6330TUR+	MAX6330LUR+	MAX6330SUR
Description	Voltage Reference, 3.3V	Voltage Reference, 5V	Voltage Reference, 3V	Power Supply Support Circuit,	Power Supply Support Circuit,	Voltage Reference, 3V
Is it lead-free?	Contains lead	Contains lead	Contains lead	Lead free	Lead free	Contains lead
Is it Rohs certified?	incompatible	incompatible	incompatible	conform to	conform to	incompatible
Maker	Maxim	Maxim	Maxim	Maxim	Maxim	Maxim
Reach Compliance Code	not_compliant	not_compliant	not_compliant	compliant	compliant	not_compliant
Number of terminals	3	3	3	-	-	3
Maximum operating temperature	85 °C	85 °C	85 °C	-	-	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-	-	-40 °C
Maximum output current	0.05 A	0.05 A	0.05 A	-	-	0.05 A
Nominal output voltage	3.3 V	5 V	3 V	-	-	3 V
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-	-	PLASTIC/EPOXY
Encapsulate equivalent code	TO-236	TO-236	TO-236	-	-	TO-236
Certification status	Not Qualified	Not Qualified	Not Qualified	-	-	Not Qualified
surface mount	YES	YES	YES	-	-	YES
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	-	-	INDUSTRIAL

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