MAX5024 MAXIM [Maxim Integrated Products], MAX5024 Datasheet

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MAX5024

Manufacturer Part Number
MAX5024
Description
65V, Low-Quiescent-Current, High-Voltage Linear Regulators with ?P Reset and Watchdog Timer
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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The MAX5023/MAX5024 high-voltage linear regulators
operate from a +6.5V to +65V input voltage and deliver
up to 150mA of output current. These devices consume
only 60µA of quiescent current with no load and with-
stand a -60V reverse-battery voltage at the input. The
MAX5023/MAX5024 include an active-low internal
microprocessor (µP) reset circuit that asserts when the
regulator output drops below the preset output voltage
threshold by 7.5% or 12.5%, depending on the device
selected. Both devices are available with a fixed +3.3V
or
circuit protected and include thermal shutdown.
In addition to an enable input to turn on or off the regu-
lator, the MAX5023/MAX5024 include a HOLD input
that allows for the implementation of a self-holding
circuit without requiring external components. Setting
HOLD low after enabling the regulator, forces the regu-
lator to remain on even if EN is subsequently set low.
Releasing HOLD shuts down the regulator.
The MAX5023 includes a watchdog input that monitors a
pulse train from the µP and generates reset pulses if the
watchdog input remains high or low for a duration longer
than the 1.6s watchdog timeout period. The MAX5024
includes a SET input which, when connected to ground,
selects a preset output voltage of +3.3V (MAX5024S/
MAX5024T) or +5V (MAX5024L/MAX5024M). Set the
adjustable output voltage by connecting SET to the regu-
lator’s output through a resistive-divider network.
The MAX5023/MAX5024 operate over the automotive
temperature range (-40°C to +125°C) and are available in
a thermally enhanced, surface-mount 8-pin SO package.
65V, Low-Quiescent-Current, High-Voltage Linear
19-2619; Rev 0; 10/02
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.
+5V
Regulators with µP Reset and Watchdog Timer
Automotive
Industrial
Home Security
output.
TOP VIEW
________________________________________________________________ Maxim Integrated Products
These
General Description
RESET
GND
EN
IN
Fire/Smoke Alarms
Telecom/Networking
1
2
4
3
devices
Applications
MAX5023
SO
are
6
8
7
5
OUT
WDI
N.C.
HOLD
short-
o Wide Operating Input Voltage Range
o Thermally Enhanced 8-Pin SO Package Dissipates
o Guaranteed 150mA Output Current
o 60µA No-Load Supply Current
o -60V Reverse-Battery Protection
o Preset +3.3V or +5.0V Output Voltage
o Thermal and Short-Circuit Protection
o Operate Over -40°C to +125°C Temperature Range
o Integrated µP Reset Circuit
o Watchdog Timer with 1.6s Timeout Period
o Regulator Enable and Hold Inputs Implement
o SET Input for Adjustable Output Voltage
Note: These parts offer a choice of reset thresholds, reset
threshold tolerances, and regulator output voltages. From the
Selector Guide, insert the desired suffix letter into the blank to
complete the part number.
Selector Guide and Typical Operating Circuit appear at end
of data sheet.
MAX5023 _ ASA
MAX5024 _ ASA
+6.5V to +65V
1.5W
(MAX5023)
Self-Holding Circuit
(MAX5024)
PART
RESET
GND
EN
IN
1
2
4
3
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
Ordering Information
MAX5024
Pin Configurations
SO
7
6
5
8
OUT
N.C.
SET
HOLD
PIN-PACKAGE
Features
8 SO
8 SO
1

Related parts for MAX5024

MAX5024 Summary of contents

Page 1

... The MAX5023 includes a watchdog input that monitors a pulse train from the µP and generates reset pulses if the watchdog input remains high or low for a duration longer than the 1.6s watchdog timeout period. The MAX5024 includes a SET input which, when connected to ground, selects a preset output voltage of +3.3V (MAX5024S/ MAX5024T) or +5V (MAX5024L/MAX5024M) ...

Page 2

... I = 150m ≤ +0. +5V OUT SET = GND 1mA to 150mA, OUT 5V version SET = GND 1mA to 150mA, OUT 3.3V version I = 5mA, adjustable version (MAX5024) OUT I = 150mA +5V (Note 2) LOAD OUT Rising edge 500Ω, IN OUT L SET = GND +5V version / +8V ≤ V ≤ +65V IN +3 ...

Page 3

... OUT V = +5V OUT V = +8V IN MAX502_L, SET = GND MAX502_M, SET = GND MAX502_T, SET = GND MAX502_S, SET = GND TH MAX5024L/T, SET = Divider (Figure 1) (Note 3) MAX5024M/S, SET = Divider (Figure 1) (Note 3) V falling OUT ≥ +1.0V 50µA, OUT SINK RESET asserted ≥ +2.85V 1.2mA, OUT ...

Page 4

Low-Quiescent-Current, High-Voltage Linear Regulators with µP Reset and Watchdog Timer (V = +14V 10µ 15µ OUT OUTPUT VOLTAGE vs. INPUT VOLTAGE 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 ...

Page 5

Low-Quiescent-Current, High-Voltage Linear Regulators with µP Reset and Watchdog Timer (V = +14V 10µ 15µ OUT INPUT VOLTAGE STEP RESPONSE MAX5023 toc10 5V V OUT 1V/div 65V V IN 20V/div V = ...

Page 6

... Feedback Input for Setting the Output Voltage. Connect to GND to set the output voltage to — 7 SET the preset fixed value (+3.3V or +5V). Connect to an external resistor-divider network for adjustable output operation (MAX5024 only). 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) = +2.4V +5V, SET = GND, T ...

Page 7

... The regulator accepts an input voltage range from +6.5V to +65V. The MAX5023/MAX5024 offer fixed out- put voltages of +3.3V and +5V. The MAX5024 also fea- tures an adjustable output voltage that is implemented with an external resistive-divider network connected between OUT, SET, and GND (Figure 1). The MAX5024 automatically determines the feedback path depending on the voltage at SET ...

Page 8

... HOLD to OUT) to turn the regulator off. Force EN low and HOLD high to place the MAX5023/ MAX5024 into shutdown mode. Shutdown mode draws less than 16µA of supply current. Table 1 shows the state of the regulator output with respect to the voltage level at ...

Page 9

... ENABLE INACTIVE, CLAMPED BY INT, PULLDOWN RESISTOR Figure 3. Enable and Hold Behavior Dual Mode is a trademark of Maxim Integrated Products, Inc. _______________________________________________________________________________________ load conditions. Thermal protection protects the MAX5023/MAX5024 in the event of fault conditions. For continuous operation, do not exceed the absolute maxi- mum junction temperature rating +150° ...

Page 10

... D °   1 538 . - 0.01923 for A 10 ______________________________________________________________________________________ COMMENTS ON OFF Figure 4. Setting the MAX5024 Adjustable Output Voltage 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0 100 110 120 130 140 150 Figure 5. Maximum Power Dissipation vs. Temperature After determining the allowable package dissipation, calculate the maximum output current using the follow- ...

Page 11

Low-Quiescent-Current, High-Voltage Linear Regulators with µP Reset and Watchdog Timer Example +95° +14V +5V OUT Find the maximum allowable output current. First calcu- late package dissipation at the given temperature ...

Page 12

... MAX5024S — Bold Items indicate standard versions. Samples are generally available on standard versions only. Contact factory for availability of non- standard versions. Set MAX5024’s adjustable output voltage by connecting a resistive-divider from OUT to SET (see the Output Voltage Selection section). Typical Operating Circuit +6 ...

Page 13

Low-Quiescent-Current, High-Voltage Linear Regulators with µP Reset and Watchdog Timer (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.) Maxim cannot assume responsibility for use ...

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