Datasheet

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

General Description

The MAX6018 is a precision, low-voltage, low-dropout,

micropower voltage reference in a SOT23 package. This

three-terminal reference operates with an input voltage

from (V

OUT

+ 200mV) to 5.5V, and is available with out-

put voltage options of 1.2V, 1.6V, 1.8V, and 2.048V

The MAX6018 voltage reference consumes less than

5µA (max) of supply current and can source and sink

up to 1mA of load current. Unlike conventional shunt-

mode (two-terminal) references that waste supply cur-

rent and require an external resistor, devices in the

MAX6018 family offer a supply current that is virtually

independent of supply voltage (with only 0.1µA/V varia-

tion with supply voltage) and do not require an external

resistor. The MAX6018 has initial accuracies of 0.2% (A

grade) and 0.4% (B grade) and temperature drift of

50ppm/°C (max). The low-dropout voltage and the

ultra-low, supply voltage-independent supply current

make this device ideal for two-cell alkaline, end-of-life,

battery-monitoring systems. The MAX6018 is available

in a tiny 3-pin SOT23 package.

Applications

Two-Cell, Battery-Operated Systems

Battery-Operated Equipment

Hand-Held Equipment

Data-Acquisition Systems

Industrial and Process-Control Systems

Features

♦ Ultra-Low Supply Current: 5µA (max)

♦ 1.6V Output from 1.8V Input

♦ Ultra-Small, 3-Pin SOT23 Package

♦ Initial Accuracy: ±0.2% (max)

♦ Low Temperature Drift: 50ppm/°C (max)

♦ 200mV Dropout Voltage

♦ Load Regulation (1mA Source): 700µV/mA (max)

♦ Line Regulation (V

OUT

+ 200mV) to 5.5V: 250µV/V

(max)

♦ Four Output Voltage Options: 1.2V, 1.6V,

1.8V, 2.048V

MAX6018

Precision, Micropower, 1.8V Supply,

Low-Dropout, SOT23 Voltage Reference

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

OUT

REFERENCE

OUT

GND

MAX6018

*OPTIONAL

1µF, MAX*

Typical Application Circuit

19-2211; Rev 2; 12/02

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.

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX6018AEUR12-T

-40°C to +85°C 3 SOT23-3

FZJH

MAX6018BEUR12-T

-40°C to +85°C 3 SOT23-3

FZJI

MAX6018AEUR16-T

-40°C to +85°C 3 SOT23-3

FZJJ

MAX6018BEUR16-T

-40°C to +85°C 3 SOT23-3

FZJK

MAX6018AEUR18-T

-40°C to +85°C 3 SOT23-3

FZJL

MAX6018BEUR18-T

-40°C to +85°C 3 SOT23-3

FZJM

MAX6018AEUR21-T

-40°C to +85°C 3 SOT23-3

FZJN

MAX6018BEUR21-T

-40°C to +85°C 3 SOT23-3

FZJO

Selector Guide

PART

OUTPUT

VOLTAGE (V)

INITIAL

ACCURACY (%)

MAX6018AEUR12 1.263 ±0.2

MAX6018BEUR12 1.263 ±0.4

MAX6018AEUR16 1.600 ±0.2

MAX6018BEUR16 1.600 ±0.4

MAX6018AEUR18 1.800 ±0.2

MAX6018BEUR18 1.800 ±0.4

MAX6018AEUR21 2.048 ±0.2

MAX6018BEUR21 2.048 ±0.4

OUT

3 GND

MAX6018

SOT23

TOP VIEW

Pin Configuration

Summary of content (9 pages)

PAGE 1
9-2211; Rev 2; 12/02 Precision, Micropower, 1.8V Supply, Low-Dropout, SOT23 Voltage Reference The MAX6018 is a precision, low-voltage, low-dropout, micropower voltage reference in a SOT23 package. This three-terminal reference operates with an input voltage from (VOUT + 200mV) to 5.5V, and is available with output voltage options of 1.2V, 1.6V, 1.8V, and 2.048V The MAX6018 voltage reference consumes less than 5µA (max) of supply current and can source and sink up to 1mA of load current.
PAGE 2
MAX6018 Precision, Micropower, 1.8V Supply, Low-Dropout, SOT23 Voltage Reference ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to GND) VIN ............................................................................-0.3V to +6V Output Short-Circuit Duration to GND or VIN ............Continuous Continuous Power Dissipation (TA = +70°C) 3-Pin SOT23 (derate 4.0mW/°C above +70°C).............320mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................
PAGE 3
Precision, Micropower, 1.8V Supply, Low-Dropout, SOT23 Voltage Reference (VIN = 1.8V; COUT = 47nF, IOUT = 0; TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage VOUT MAX6018A_16 (0.2%) TA = +25°C 1.5968 1.6000 1.6032 MAX6018B_16 (0.4%) TA = +25°C 1.5936 1.6000 1.6064 V Output Voltage Temperature Drift TCVOUT (Note 2) 16 50 ppm/oC Line Regulation ∆VOUT/ ∆VIN 1.8V ≤ VIN ≤ 5.
PAGE 4
MAX6018 Precision, Micropower, 1.8V Supply, Low-Dropout, SOT23 Voltage Reference ELECTRICAL CHARACTERISTICS (MAX6018_18–1.800V) (VIN = 2.0V; COUT = 47nF, IOUT = 0; TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage VOUT MAX6018A_18 (0.2%) TA = +25°C 1.7964 1.8000 1.8036 MAX6018B_18 (0.4%) TA = +25°C 1.7928 1.8000 1.
PAGE 5
Precision, Micropower, 1.8V Supply, Low-Dropout, SOT23 Voltage Reference (VIN = 2.25V; COUT = 47nF, IOUT = 0; TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage VOUT MAX6018A_21 (0.2%) TA = +25°C 2.0439 2.0480 2.0521 MAX6018B_21 (0.4%) TA = +25°C 2.0398 2.0480 2.0562 V Output Voltage Temperature Drift TCVOUT (Note 2) 16 50 ppm/oC Line Regulation ∆VOUT/ ∆VIN 2.25V ≤ VIN ≤ 5.
PAGE 6
Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) MAX6018_12 OUTPUT VOLTAGE DRIFT vs. TEMPERATURE 1.2620 2.049 2.048 2.047 2.046 2.045 MAX6018 toc03 1.266 1.265 OUTPUT VOLTAGE (V) 1.2625 MAX6018_12 LONG-TERM DRIFT MAX6018 toc02 2.050 OUTPUT VOLTAGE (V) 1.2630 OUTPUT VOLTAGE (V) MAX6018_21 OUTPUT VOLTAGE DRIFT vs. TEMPERATURE MAX6018 toc01 1.2635 1.264 1.263 1.262 1.2615 1.261 1.2610 2.043 0 25 50 75 -50 -25 0 25 50 75 100 1.
PAGE 7
Precision, Micropower, 1.8V Supply, Low-Dropout, SOT23 Voltage Reference SUPPLY CURRENT vs. INPUT VOLTAGE 30 MAX6018_21 3.15 3.10 3.05 20 3.00 10 2.95 1 10 100 1k 10k 2 3 4 5 FREQUENCY (Hz) INPUT VOLTAGE (V) SUPPLY CURRENT vs. TEMPERATURE MAX6018_21 0.1Hz TO 10Hz OUTPUT NOISE 3.8 3.6 6 0.01 0.1 1 10 100 1k 10k MAX6018_12 TURN-ON TRANSIENT VIN = 5.5V 3.4 1 FREQUENCY (Hz) MAX6018 toc13 4.0 10 0.01 1 100k 100 0.1 MAX6018_18 2.90 0 SUPPLY CURRENT (µA) 3.
PAGE 8
MAX6018 Precision, Micropower, 1.8V Supply, Low-Dropout, SOT23 Voltage Reference Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.
PAGE 9
Precision, Micropower, 1.8V Supply, Low-Dropout, SOT23 Voltage Reference SOT23 L.EPS Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.