MAX6770TAVD3+T Maxim Integrated Products, MAX6770TAVD3+T Datasheet

IC REG LINEAR 1.8V/ADJ 8-TDFN

MAX6770TAVD3+T

Manufacturer Part Number
MAX6770TAVD3+T
Description
IC REG LINEAR 1.8V/ADJ 8-TDFN
Manufacturer
Maxim Integrated Products
Type
Regulator/Supervisorr
Datasheet
1.MAX6765TTSD2T.pdf (22 pages)

Specifications of MAX6770TAVD3+T

Number Of Voltages Monitored
1
Output
Push-Pull, Totem Pole
Reset
Active Low
Reset Timeout
35 ms Minimum
Voltage - Threshold
1.575V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-TDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX6765–MAX6774B are low-quiescent-current,
high-voltage linear regulators that operate from 4V to 72V
and deliver up to 100mA of load current. These low-
power devices consume only 31µA of quiescent current,
making them ideal for always-on automotive modules.
These devices are offered with fixed standard output
options of 5.0V, 3.3V, 2.5V, and 1.8V, or can be adjusted
from 1.8V to 11V with two external resistors.
The MAX6765–MAX6774B feature a push-pull or open-
drain, active-low RESET output with either fixed or
adjustable thresholds. Whenever the regulator’s output
falls below the reset threshold, the RESET output asserts
and remains asserted for at least the minimum reset
timeout period after the output voltage exceeds its
threshold. The minimum reset timeout period is offered
with fixed values from 75µs to 200ms or can be adjusted
externally with a small capacitor.
These devices provide three regulator enable modes to
accommodate several power-on schemes. The
MAX6765/MAX6766/MAX6769/MAX6770/MAX6773/
MAX6773B/MAX6774/MAX6774B feature a single tradi-
tional enable input (ENABLE) to turn on and off the regula-
tor. The MAX6771/MAX6772 provide dual enable inputs
(ENABLE1 and ENABLE2) to turn on and off the regulator
either through an ignition switch or a bus transceiver. The
MAX6767/MAX6768 provide a hold input (HOLD) in addi-
tion to the enable input to allow for the implementation of a
self-holding circuit without requiring external components.
Setting HOLD low after enabling the regulator forces the
regulator to remain on even if ENABLE is subsequently
set low. Releasing HOLD shuts down the regulator.
The MAX6773/MAX6773B/MAX6774/MAX6774B also
include a watchdog input that monitors a pulse train from
the microprocessor (µP) and generates a reset pulse if
the watchdog input remains high or low for a duration
longer than the 1.6s (typ) (MAX6773/MAX6774) or 50ms
(typ) (MAX6773B/MAX6774B) watchdog timeout period.
The MAX6765–MAX6774B are available in a small, ther-
mally enhanced 3mm x 3mm TDFN package that can
dissipate up to 1.951W, thereby supporting continuous
regulator operation during high ambient temperatures,
high battery voltage, and high load-current conditions.
The MAX6765–MAX6774B are fully specified for a -40°C
to +125°C operating temperature range.
19-0657; Rev 4; 6/10
Typical Application Circuit and Selector Guide appear at
end of data sheet.
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.
Automotive
Industrial
Telecom
Automotive Micropower Linear Regulators
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o Low 31µA Quiescent Current
o 4V to 72V Wide Input Voltage Range
o 100mA Output Current Capability
o Dropout Voltage of 620mV with 5V Output
o Fixed Output-Voltage Options: 5V, 3.3V, 2.5V,
o Watchdog Timer Option (1.6s (MAX6773/
o Adjustable Output Voltages from 1.8V to 11V
o Open-Drain or Push-Pull RESET Output
o Fixed or Capacitor-Adjustable Reset Timeouts
o Small, Thermally Enhanced 1.9W, 3mm x 3mm
o Overtemperature and Short-Circuit Protection
o Fully Specified from -40°C to +125°C
Ordering Information continued at end of data sheet.
The first “_” is a placeholder for the voltage output and reset
threshold. The 2nd “_” designates the fixed reset-timeout option.
See Tables 1 and 2 for details. For example, the MAX6765TTLD4
has a 5V output, a reset threshold of 4.65V, and a 200ms typical
reset timeout.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
* EP = Exposed pad.
For tape-and-reel orders add a “T” after the “+” symbol to com-
plete the part number. Tape-and-reel orders are available in
2.5k increments. Nonstandard versions require a 10k minimum
order quantity.
MAX6765TT_D_+
MAX6765TT_D_/V+
Pin Configurations continued at end of data sheet.
at 100mA
and 1.8V
MAX6774) and 50ms (MAX6773B/MAX6774B))
TDFN Package
PART
TOP VIEW
with Supervisor
+
Ordering Information
6
1
-40°C to +125°C
-40°C to +125°C
MAX6765
MAX6766
Pin Configurations
TDFN
RANGE
TEMP
5
2
4
3
EP
Features
PIN-
PACKAGE
6 TDFN-EP*
6 TDFN-EP*
1

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MAX6770TAVD3+T Summary of contents

Page 1

... Industrial Telecom Typical Application Circuit and Selector Guide appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. o Low 31µA Quiescent Current 72V Wide Input Voltage Range ...

Page 2

... Output Voltage Adjustable Output Voltage Range SET Threshold Voltage (MAX6767–MAX6774) Dual Mode™ SET Threshold Dual Mode is a trademark of Maxim Integrated Products, Inc. 2 _______________________________________________________________________________________ 8-Pin TDFN 3mm x 3mm (derate 24.4mW/°C above +70°C) ...........................1951.2mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature ......................................................+150° ...

Page 3

Automotive Micropower Linear Regulators ELECTRICAL CHARACTERISTICS (continued 14V 0.1µ 10µ OUT (Note 1) PARAMETER SYMBOL SET Input Current (MAX6767–MAX6774) ΔV Dropout Voltage (Note 3) Guaranteed Output Current (Note 4) 100 mA ...

Page 4

Automotive Micropower Linear Regulators with Supervisor ELECTRICAL CHARACTERISTICS (continued 14V 0.1µ 10µ OUT (Note 1) PARAMETER SYMBOL RESET Threshold (Adjustable Output Voltage) RESETIN Input Current RESETIN Threshold OUT to RESET Delay ...

Page 5

Automotive Micropower Linear Regulators (V = 14V 10µ 0.1µ OUT IN SUPPLY CURRENT vs. INPUT VOLTAGE 3.3V OUT 42 LIMITED BY POWER 40 DISSIPATION I = 100mA 38 LOAD 36 34 ...

Page 6

Automotive Micropower Linear Regulators with Supervisor (V = 14V 10µ 0.1µ OUT IN OUTPUT VOLTAGE vs. LOAD CURRENT 1. 1.8V OUT 1.84 1.83 1.82 1.81 1.80 1.79 1.78 1.77 1.76 1.75 0 ...

Page 7

Automotive Micropower Linear Regulators (V = 14V 10µ 0.1µ OUT IN POWER-SUPPLY REJECTION RATIO vs. FREQUENCY -20 -40 -60 -80 -100 -120 -140 -160 -180 0 100 FREQUENCY (Hz) ...

Page 8

Automotive Micropower Linear Regulators with Supervisor OUT TEST CIRCUIT FOR OUT AND HOLD VS. ENABLE PIN MAX6765/ MAX6767/ MAX6769/ MAX6766 MAX6768 MAX6770 ...

Page 9

Automotive Micropower Linear Regulators PIN MAX6765/ MAX6767/ MAX6769/ MAX6766 MAX6768 MAX6770 — 4 — — — — 4 — — — — — — — — — — — — Detailed Description The MAX6765–MAX6774B low-quiescent-current, high- voltage linear ...

Page 10

Automotive Micropower Linear Regulators with Supervisor IN CONTROL ENABLE LOGIC 10 ______________________________________________________________________________________ THERMAL PROTECTION MAX6765/MAX6766 OVERCURRENT PROTECTION 1.147V TIMEOUT 1.233V OR 1.085V TIMEOUT GND Functional Diagrams OUT RESET RESET ...

Page 11

Automotive Micropower Linear Regulators IN ENABLE CONTROL LOGIC HOLD 1.233V ______________________________________________________________________________________ with Supervisor Functional Diagrams (continued) THERMAL PROTECTION MAX6767/MAX6768 OVERCURRENT PROTECTION 116mV 1.147V RESET TIMEOUT OR 1.085V TIMEOUT GND OUT SET RESET 11 ...

Page 12

Automotive Micropower Linear Regulators with Supervisor IN CONTROL ENABLE LOGIC 12 ______________________________________________________________________________________ Functional Diagrams (continued) THERMAL PROTECTION MAX6769/MAX6770 OVERCURRENT PROTECTION 116mV 1.147V RESET 1.233V TIMEOUT OR 1.085V RESETIN TIMEOUT GND OUT SET RESET ...

Page 13

Automotive Micropower Linear Regulators IN ENABLE1 CONTROL LOGIC ENABLE2 1.233V ______________________________________________________________________________________ with Supervisor Functional Diagrams (continued) THERMAL PROTECTION MAX6771/MAX6772 OVERCURRENT PROTECTION 116mV 1.147V RESET TIMEOUT OR 1.085V TIMEOUT GND OUT SET RESET 13 ...

Page 14

Automotive Micropower Linear Regulators with Supervisor IN CONTROL ENABLE LOGIC 14 ______________________________________________________________________________________ Functional Diagrams (continued) THERMAL MAX6773/MAX6773B PROTECTION MAX6774/MAX6774B OVERCURRENT PROTECTION 116mV 1.147V RESET 1.233V TIMEOUT OR 1.085V TIMEOUT GND OUT SET RESET WDI ...

Page 15

Automotive Micropower Linear Regulators The regulator accepts an input voltage from +4V to +72V. All of the devices feature fixed output-voltage options of +1.8V, +2.5V, +3.3V, and +5V. The MAX6767-MAX6774B feature an adjustable output voltage set with an external resistive-divider ...

Page 16

Automotive Micropower Linear Regulators with Supervisor Table 3. ENABLE/HOLD Truth Table/State Table OPERATING HOLD ENABLE STATE Initial State Low Don’t care Turn-On State High Don’t care Hold High Low Setup State Hold State Low Low High Off-State Low (floats high) ...

Page 17

Automotive Micropower Linear Regulators Available Output-Current Calculation The MAX6765–MAX6774B provide up to 100mA of load current. Package power dissipation limits the amount of output current available for a given input/output voltage and ambient temperature. Figures 3 and 4 depict the ...

Page 18

Automotive Micropower Linear Regulators with Supervisor Ensuring a Valid RESET Output Down (MAX6766/MAX6768/MAX6770/ IN MAX6772/MAX6774/MAX6774B) falls below 1V, RESET current-sinking capa- When V IN bilities decline drastically. High-impedance CMOS- logic inputs connected to RESET can drift ...

Page 19

Automotive Micropower Linear Regulators RESET PART OUTPUT MAX6765 Open drain MAX6766 Push-pull MAX6767 Open drain MAX6768 Push-pull MAX6769 Open drain MAX6770 Push-pull MAX6771 Open drain MAX6772 Push-pull MAX6773 Open drain MAX6773B Open drain MAX6774 Push-pull MAX6774B Push-pull 12V BATTERY ______________________________________________________________________________________ ...

Page 20

Automotive Micropower Linear Regulators with Supervisor TOP VIEW 8 7 MAX6767 MAX6768 + 1 2 TDFN TOP VIEW 8 7 MAX6771 MAX6772 + 1 2 TDFN 20 ______________________________________________________________________________________ Pin Configurations (continued) TOP VIEW TOP VIEW ...

Page 21

Automotive Micropower Linear Regulators Ordering Information (continued) TEMP PART RANGE MAX6766TT_D_+ -40°C to +125°C MAX6767TA_D_+ -40°C to +125°C MAX6768TA_D_+ -40°C to +125°C MAX6769TA_D_+ -40°C to +125°C MAX6770TA_D_+ -40°C to +125°C MAX6771TA_D_+ -40°C to +125°C MAX6772TA_D_+ -40°C to +125°C MAX6773TA_D_+ -40°C ...

Page 22

... 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. 22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products ...

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