Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - voltage reference Shunt Adjustable SOT 23-3

General Description

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.

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

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

*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.

PART* TEMP RANGE PIN-PACKAGE

MAX6330_UR-T -40°C to +85°C 3 SOT23-3

MAX6331_UR-T -40°C to +85°C 3 SOT23-3

SUFFIX

RESET

THRESHOLD

(V)

SHUNT

REGULATOR

VOLTAGE

(V)

SOT

TOP MARK

MAX6330 MAX6331

L 4.63 5.0 EKAA ELAA

T 3.06 3.3 EMAA ENAA

S 2.78 3.0 EDAA EPAA

TOP VIEW

RESET

(RESET)

GND

( ) ARE FOR THE MAX6331

SHUNT

MAX6330

MAX6331

SOT23-3

MAX6330

MAX6331

SHUNT

LOAD

RESET

(RESET)

RESET

INPUT

GND

0.1µF*

GND

µP

*SEE THE SECTION CHOOSING THE BYPASS CAPACITOR (C

)

MAX6330/MAX6331 Precision Shunt Regulators with

Reset in SOT23-3

19-1348; Rev 2; 4/14

Pin Conguration

Ordering Information

Typical Operating Circuit

Summary of content (9 pages)

PAGE 1
MAX6330/MAX6331 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 protecting µPs from powerup, power-down, and brownout conditions. Both active-low (MAX6330) and active-high (MAX6331) push/pull output versions are available.
PAGE 2
MAX6330/MAX6331 Precision Shunt Regulators with Reset in SOT23-3 Absolute Maximum Ratings Terminal Voltage (with respect to GND), All Pins Except SHUNT...................-0.3V to (VSHUNT + 0.3V) Input Current (ISHUNT)........................................................60mA Output Current (RESET/RESET)........................................20mA Short-Circuit Duration.................................................Continuous Continuous Power Dissipation SOT23-3 (derate 4mW/°C above +70°C)...........
PAGE 3
MAX6330/MAX6331 Precision Shunt Regulators with Reset in SOT23-3 Electrical Characteristics (continued) (ISHUNT = 1mA, CL = 0.1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) ISINK = 3.2mA RESET/RESET Output Voltage Low (Note 4) VOL ISINK = 1.2mA VOH 0.4 MAX6331L, VTH(max) MAX6330T/S, VTH(min) 0.3 MAX6331T/S, VTH(max) V MAX6330, V SHUNT = 1V, I SINK = 50µA, TA = 0°C to +70°C 0.3 MAX6330, V SHUNT = 1.2V, I SINK = 50µA, TA = -40°C to +85°C 0.
PAGE 4
MAX6330/MAX6331 Precision Shunt Regulators with Reset in SOT23-3 Typical Operating Characteristics (Typical Operating Circuit, CL = 0.1µF, ILOAD = 0mA, TA = +25°C, unless otherwise noted.) 0.01 0.1 1 10 ISHUNT = 1mA 0.995 0.990 50 -40 -20 SHUNT CURRENT (mA) 0 20 40 60 0 20 40 ISHUNT = 1mA TO 1mA 5 0.0047 0.
PAGE 5
MAX6330/MAX6331 Precision Shunt Regulators with Reset in SOT23-3 Pin Description PIN MAX6330 MAX6331 NAME FUNCTION 1 1 GND Ground 2 — RESET Inverting Reset Output. RESET remains low while VSHUNT is below the reset threshold and for 140ms after VSHUNT rises above the threshold. — 2 RESET Noninverting Reset Output. RESET remains high while VSHUNT is below the reset threshold and for 140ms after VSHUNT rises above the threshold. 3 3 SHUNT Regulated Shunt Voltage (+5V, +3.3V, or +3.
PAGE 6
MAX6330/MAX6331 Precision Shunt Regulators with Reset in SOT23-3 PR = IIN(VIN(max) - VSHUNT) = I2INRS = (VIN(max) - VSHUNT)2 / RS Applications Information ILOAD 2mA/div IIN = 2mA, ILOAD = 0 to 1.9mA VSHUNT IS AC COUPLED MAX6330 FIG 02 resistor used.
PAGE 7
MAX6330/MAX6331 Precision Shunt Regulators with Reset in SOT23-3 capacitor allows a sharper drop in VSHUNT when the load transient occurs, and will suffer from a steeper overshoot when the device re-enters regulation. On the other hand, the increased compensation on a larger bypass capacitor will lead to a longer recovery time to regulation. The Typical Operating Characteristics graph Overshoot vs. Bypass Capacitance (CL) illustrates this trade-off.
PAGE 8
MAX6330/MAX6331 Chip Information TRANSISTOR COUNT: 283 www.maximintegrated.com Precision Shunt Regulators with Reset in SOT23-3 Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO.
PAGE 9
MAX6330/MAX6331 Precision Shunt Regulators with Reset in SOT23-3 Revision History REVISION NUMBER REVISION DATE 2 4/14 PAGES CHANGED DESCRIPTION No /V OPNs; Removed Automotive reference from Applications section 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.