Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - system monitor Dual voltage detector uMAX 10

General Description

The MAX6338 quad voltage monitor is capable of moni-

toring up to four supplies without any external compo-

nents. A variety of factory-trimmed threshold voltages

and supply tolerances are available to optimize the

MAX6338 for specific applications. The selection

includes input options for monitoring +5.0V, +3.3V,

+3.0V, +2.5V, +1.8V, and -5.0V voltages. An additional

high-input impedance comparator option can be used

as an adjustable voltage monitor, general-purpose com-

parator, or digital level translator.

Each of the monitored voltages is available with trip

thresholds to support power-supply tolerances of either

5% or 10% below the nominal voltage. An internal

bandgap reference ensures accurate trip thresholds

across the extended (-40°C to +85°C) operating temper-

ature range.

The MAX6338 consumes 25µA (typ) supply current and

operates with supply voltages from +2.5V to +5.5V. An

internal undervoltage lockout circuit forces all four digital

outputs low when V

drops below the minimum operat-

ing voltage. The four digital outputs all have weak inter-

nal pull-ups to V

, allowing wire-ORed connection.

Each input threshold voltage has an independent output.

The MAX6338 is available in a 10-pin µMAX

package.

________________________Applications

Telecommunications

High-End Printers

Desktop and Notebook Computers

Data Storage Equipment

Networking Equipment

Industrial Equipment

Set-Top Boxes

Features

♦ Monitors Four Voltages (Factory Programmed or

User Adjustable)

+5.0V, +3.3V, +3.0V, +2.5V, +1.8V, -5.0V

(nominal) or User-Adjustable Settings

♦ Low 25µA Supply Current

♦ Four Independent, Open-Drain, Active-Low

Outputs

♦ +2.5V to +5.5V Supply Voltage Range

♦ Guaranteed from -40°C to +85°C

♦ No External Components Required

♦ Small 10-Pin µMAX Package

MAX6338

Quad Voltage Monitor in µMAX Package

________________________________________________________________ Maxim Integrated Products 1

OUT1

OUT2

OUT3IN4

IN3

IN2

IN1

MAX6338

µMAX

TOP VIEW

OUT4GND

Pin Configuration

NOMINAL INPUT VOLTAGE

PART

IN1

(V)

IN2

(V)

IN3

(V)

IN4

(V)

SUPPLY

TOLERANCE

(%)

MAX6338AUB

3.3 2.5 Adj*

MAX6338BUB

3.3 2.5† Adj*

MAX6338CUB

3.3 1.8 Adj*

MAX6338DUB

3.3 1.8† Adj*

MAX6338EUB

3.0 2.5 Adj*

MAX6338FUB

3.0 2.5† Adj*

MAX6338GUB

3.0 1.8 Adj*

MAX6338HUB

3.0 1.8† Adj*

MAX6338IUB

3.3 2.5 1.8

MAX6338JUB

3.3 2.5† 1.8†

MAX6338KUB

Adj* 3.3 2.5 Adj*

MAX6338LUB

Adj* 3.3 2.5† Adj*

MAX6338MUB

3.0 Adj*

-5 10

MAX6338NUB

3.0 Adj*

-5 5

MAX6338OUB

3.3 Adj*

-5 10

MAX6338PUB

3.3 Adj*

-5 5

19-1695; Rev 2; 12/05

Ordering Information

Selector Guide

PART TEMP RANGE

PIN-PACKAGE

MAX6338_UB* -40°C to +85°C 10 µMAX

*Insert the desired letter from the Selector Guide into the blank

to complete the part number.

Devices are available in both leaded and lead-free packaging.

Specify lead free by adding the + symbol at the end of the part

number when ordering.

*Adjustable voltage based on +1.23V internal threshold. External

threshold voltage can be set using an external resistor-divider.

† Nominal input voltages for 1.8V and 2.5V are specified for 10%

tolerances

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.

µMAX is a registered trademark of Maxim Integrated Products, Inc.

Summary of content (8 pages)

PAGE 1
9-1695; Rev 2; 12/05 Quad Voltage Monitor in µMAX Package The MAX6338 quad voltage monitor is capable of monitoring up to four supplies without any external components. A variety of factory-trimmed threshold voltages and supply tolerances are available to optimize the MAX6338 for specific applications. The selection includes input options for monitoring +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V voltages.
PAGE 2
MAX6338 Quad Voltage Monitor in µMAX Package ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) VCC ......................................................................-0.3V to +6V Output Voltages (OUT_) ...........................................-0.3V to +6V Input Voltages (IN_) (except -5V).............................-0.3V to +6V Input Voltage (-5V input) ..........................................-6V to +0.3V Continuous OUT_ Current...................................................
PAGE 3
Quad Voltage Monitor in µMAX Package NORMALIZED THRESHOLD ERROR vs. SUPPLY VOLTAGE 30 25 TA = -40°C 20 15 0.04 0.02 0 -0.02 3.0 3.5 4.0 4.5 5.0 -0.1 -0.2 -0.3 2.5 5.5 0 NORMALIZED TO +5V -0.04 3.0 3.5 4.0 4.5 5.0 5.5 -40 -20 0 20 40 60 SUPPLY VOLTAGE (V) TEMPERATURE (°C) OUTPUT-VOLTAGE LOW vs. SINK CURRENT PROPAGATION DELAY (WITH 100mV OVERDRIVE) PROPAGATION DELAY (WITH 20mV OVERDRIVE) 0.6 VCC = 5V 0.5 0.4 80 MAX6338-06 SUPPLY VOLTAGE (V) MAX6338-04 2.
PAGE 4
Quad Voltage Monitor in µMAX Package MAX6338 Pin Description PIN NAME FUNCTION 1 IN1 Input Voltage 1. See the Selector Guide for monitored voltages. 2 IN2 Input Voltage 2. See the Selector Guide for monitored voltages. 3 IN3 Input Voltage 3. See the Selector Guide for monitored voltages. 4 IN4 Input Voltage 4. See the Selector Guide for monitored voltages. 5 GND Ground 6 OUT4 Output 4. OUT4 goes low when VIN4 falls below its absolute threshold.
PAGE 5
Quad Voltage Monitor in µMAX Package MAX6338 VCC MAX6338M/N/O/P IN1 OUT1 VCC IN2 OUT2 VCC IN3* (AUX)* OUT3 VCC IN4 (-5V) OUT4 VREF REFERENCE VCC UNDERVOLTAGE LOCKOUT *SEE AUXILIARY INPUT SECTION. Figure 1.
PAGE 6
MAX6338 Quad Voltage Monitor in µMAX Package +5V +5V 0.1µF* VCC V1 IN1 V2 IN2 V3 IN3 V4 IN4 MAX6338 VCC VIN (+5V) D1 IN1 IN2 OUT1 OUT1 MAX6338 D2 OUT2 D3 OUT2 IN3 OUT3 IN4 OUT4 OUT3 D4 OUT4 GND GND *OPTIONAL Figure 2. Quad Undervoltage Detector with LED Indicators +5V VTH1 = 1 + R2 VREF R1 ( ) OUT1 VCC R2 VREF = 1.23V Figure 3.
PAGE 7
Quad Voltage Monitor in µMAX Package R1 The unused inputs (except the auxiliary) are internally connected to ground through the lower resistors of the threshold-setting resistor pairs. The auxiliary (AUX) input, however, must be connected to either ground or VCC if unused. R2 The MAX6338 operates from a single +2.5V to +5.5V supply. In noisy applications, connect a 0.1µF capacitor on the supply voltage line close to VCC pin for bypassing. Power-Supply Bypassing and Grounding VREF = 1.
PAGE 8
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.) e 10LUMAX.EPS MAX6338 Quad Voltage Monitor in µMAX Package 4X S 10 10 INCHES H Ø0.50±0.1 0.6±0.1 1 1 0.6±0.1 BOTTOM VIEW TOP VIEW D2 MILLIMETERS MAX DIM MIN 0.043 A 0.006 A1 0.002 A2 0.030 0.037 D1 0.120 0.116 0.118 D2 0.114 E1 0.116 0.120 0.118 E2 0.114 0.199 H 0.187 L 0.0157 0.0275 L1 0.037 REF b 0.