Datasheet

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General Description

The MAX6037 family of low-dropout, micropower volt-

age references offer fixed and adjustable output volt-

age options ranging from 1.184V to 5V. Connect an

external resistive-divider on the MAX6037_ADJ to

adjust the output voltage from 1.184V to 5V. The other

devices in the MAX6037 family feature fixed output volt-

ages of 1.25V, 2.048V, 2.5V, 3.0V, 3.3V, and 4.096V.

The MAX6037 offers shutdown functionality with an

active-low shutdown (500nA, max).

These series-mode voltage references operate from a

2.5V to 5.5V supply and consume 275µA (max) quies-

cent current. The output is stable driving loads from

0.02µF to 1µF and can source and sink 5mA of load

current. The MAX6037 offers a low temperature coeffi-

cient of 25ppm/°C and initial accuracy of ±0.2% (max).

The low dropout voltage (100mV, max at 1mA) and

supply-independent, low supply current make the

MAX6037 ideal for battery-powered applications.

The MAX6037 is available in the miniature 5-pin SOT23

package and is specified over the -40°C to +125°C

automotive temperature range.

Applications

Medical Equipment Portable Equipment

Wireless LAN Precision Regulators

Features

♦ Adjustable V

OUT

: 1.184V to 5V

♦ Fixed Outputs: 1.25V, 2.048V, 2.5V, 3.0V, 3.3V,

and 4.096V

♦ Shutdown Current < 500nA (max)

♦ 25ppm/°C (max) Temperature Coefficient (A Grade)

♦ ±0.2% (max) Initial Accuracy (A Grade)

♦ Low 100mV (max) Dropout Voltage at 1mA Load

Current

♦ 2.5V to 5.5V Input Voltage Range

♦ 5mA Sink and Source Current Capability

♦ Available in 5-Pin SOT23 Package

♦ Operates Over the Automotive Temperature

Range: -40°C to +125°C

MAX6037

Low-Power, Fixed and Adjustable Reference

with Shutdown in SOT23

________________________________________________________________ Maxim Integrated Products 1

Ordering Information/Selector Guide

19-3192; Rev 1; 12/07

For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Ordering Information/Selector Guide continued at end of data sheet.

Typical Operating Circuit

OUT

*OPTIONAL

2.5V TO 5.5V INPUT

GND

SHDN

REFERENCE

OUTPUT

0.02µF

TO 1µF

MAX6037

Pin Configuration appears at end of data sheet.

PART

OUTPUT

VOLTAGE (V)

INITIAL

ACCURACY %

MAX TEMPCO

(ppm/°C)

PIN-PACKAGE

PKG

CODE

TOP

MARK

MAX6037AAUK12+T 1.25 0.2 25 5 SOT23-5 U5-2 AEIV

MAX6037BAUK12+T 1.25 0.3 50 5 SOT23-5 U5-2 AEIW

MAX6037CAUK12+T 1.25 0.5 50 5 SOT23-5 U5-2 AEIX

MAX6037AAUK21+T 2.048 0.2 25 5 SOT23-5 U5-2 AEIY

MAX6037BAUK21+T 2.048 0.3 50 5 SOT23-5 U5-2 AEIZ

MAX6037CAUK21+T 2.048 0.5 50 5 SOT23-5 U5-2 AEJA

+Denotes a lead-free package.

T = Tape and reel.

Note: All devices are specified over the -40°C to +125°C operating temperature range.

Summary of content (18 pages)

PAGE 1
9-3192; Rev 1; 12/07 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 Features ♦ Adjustable VOUT: 1.184V to 5V ♦ Fixed Outputs: 1.25V, 2.048V, 2.5V, 3.0V, 3.3V, and 4.096V The MAX6037 family of low-dropout, micropower voltage references offer fixed and adjustable output voltage options ranging from 1.184V to 5V. Connect an external resistive-divider on the MAX6037_ADJ to adjust the output voltage from 1.184V to 5V.
PAGE 2
MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 ABSOLUTE MAXIMUM RATINGS IN, OUT, SHDN, ADJ to GND...................................-0.3V to +6V Output Short Circuit to GND or IN............................. Continuous Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature ......................................................
PAGE 3
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 (VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SHUTDOWN (SHDN) Logic-High Input Voltage VENH 2.5V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 2.5V ≤ VIN ≤ 5.5V Logic-High Input Current IENH 2.5V ≤ VIN ≤ 5.5V, VSHDN = VIN -1000 Logic-Low Input Current IENL 2.5V ≤ VIN ≤ 5.5V, VSHDN = 0V -1000 2.
PAGE 4
MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 ELECTRICAL CHARACTERISTICS—MAX6037_21 (VOUT = 2.048V) (continued) (VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SHUTDOWN (SHDN) Logic-High Input Voltage VENH 2.5V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 2.5V ≤ VIN ≤ 5.5V 0.7 V Logic-High Input Current IENH 2.5V ≤ VIN ≤ 5.
PAGE 5
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.5 V 210 275 µA 0.05 500 nA INPUT Supply Voltage Range VIN Guaranteed by line regulation test 2.7 Quiescent Supply Current IIN Shutdown Supply Current ISHDN VSHDN = 0V Logic-High Input Voltage VENH 2.7V ≤ VIN ≤ 5.
PAGE 6
MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 ELECTRICAL CHARACTERISTICS—MAX6037_30 (VOUT = 3.000V) (continued) (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL Output Impedance when Disabled ZOUT Capacitive-Load Stability Range (Note 4) COUT CONDITIONS MIN VIN = 5V, VSHDN = 0V TYP MAX 300 0.
PAGE 7
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR Output Impedance when Disabled ZOUT Capacitive-Load Stability Range (Note 4) COUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.
PAGE 8
MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 ELECTRICAL CHARACTERISTICS—MAX6037_41 (VOUT = 4.096V) (continued) (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 9
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 (VIN = VSHDN = +5V, IOUT = 0, TA = TMIN to TMAX, ADJ shorted to OUT unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6037A_ADJ (0.2%) 1.1816 1.1840 1.1864 MAX6037B_ADJ (0.3%) 1.1805 1.1840 1.1875 MAX6037C_ADJ (0.5%) 1.1781 1.
PAGE 10
ELECTRICAL CHARACTERISTICS—MAX6037_ADJ (VOUT = 1.184V to 5V) (continued) (VIN = VSHDN = +5V, IOUT = 0, TA = TMIN to TMAX, ADJ shorted to OUT unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 0.7 V SHUTDOWN (SHDN) Logic-High Input Voltage VENH 2.5V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 2.5V ≤ VIN ≤ 5.5V Logic-High Input Current IENH 2.5V ≤ VIN ≤ 5.5V, VSHDN = VIN -1000 0.15 +1000 nA Logic-Low Input Current IENL 2.
PAGE 11
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 400 TA = +125°C 300 200 TA = -40°C TA = +25°C 100 0 2 TA = +25°C 1 TA = -40°C TA = -40°C 0 SINKING CURRENT -1 SOURCING CURRENT 2 4 6 10 8 -5 SOURCE CURRENT (mA) 3.5 4.0 4.5 5.0 -5 0 5 10 3.0 MAX6037 tpc08 -60 -120 0.001 5.5 SOURCING CURRENT TA = +125°C MAX6037_41 SHUTDOWN CURRENT vs. TEMPERATURE (VOUT = 4.096V) -100 3.0 -1 MAX6037_25 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.500V) TA = -40°C 2.
PAGE 12
MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 Typical Operating Characteristics (continued) (VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41; IOUT = 0, COUT = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.) MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V) MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V) MAX6037_12 LOAD TRANSIENT (VOUT = 1.
PAGE 13
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037_12 EXITING SHUTDOWN TRANSIENT (VOUT = 1.25V) MAX6037 toc23 MAX6037_12 SHUTDOWN TRANSIENT (VOUT = 1.25V) MAX6037 toc22 +3V VSHDN +3V VSHDN GND GND 1.25V 1.25V VOUT 500mV/div VOUT 500mV/div GND GND COUT = 0.02µF COUT = 0.02µF 2ms/div 10µs/div MAX6037_41 SHUTDOWN TRANSIENT (VOUT = 4.096V) MAX6037_41 EXITING SHUTDOWN TRANSIENT (VOUT = 4.096V) MAX6037 toc25 MAX6037 toc24 +5V +5V VSHDN VSHDN GND GND +4.096V +4.
PAGE 14
MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 Typical Operating Characteristics (continued) (VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41; IOUT = 0, COUT = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.) MAX6037_41 OUTPUT NOISE (0.1Hz TO 10Hz) MAX6037_12 OUTPUT NOISE (0.1Hz TO 10Hz) MAX6037 toc27 MAX6037 toc28 VOUT 10µV/div VOUT 2µV/div VOUT = 4.096V VOUT = 1.
PAGE 15
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 The MAX6037 is a family of low-dropout, micropower voltage references. These devices all feature a shutdown mode by forcing SHDN low, dropping the quiescent current to less than 500nA. The MAX6037 can sink and source up to 5mA with less than 410mV of dropout voltage, making them attractive for use in low-voltage applications. The MAX6037 is available in six fixed output voltages of 1.25V, 2.048V, 2.5V, 3.0V, 3.3V and 4.
PAGE 16
MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 Turn-On Time These devices typically turn on and settle to within 0.1% of their final value in 360µs to 3.2ms, depending on the device. The turn-on time can increase up to 10ms with the device operating at the minimum dropout voltage and the maximum capacitive load. Applications Information Input Bypassing For the best transient performance, decouple the input with a 0.
PAGE 17
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 SOT-23 5L .EPS ______________________________________________________________________________________ 17 MAX6037 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.
PAGE 18
MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 Revision History REVISION NUMBER REVISION DATE DESCRIPTION 0 2/04 Initial release 1 12/07 Updating selector table PAGES CHANGED — 1–7, 9, 16 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.