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MAX5024TASA+T

P1-P3P4-P6P7-P9P10-P12P13-P13
General Description
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 +5V output. These devices are short-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-EP
package.
Applications
Automotive Fire/Smoke Alarms
Industrial Telecom/Networking
Home Security
Features
♦ Wide Operating Input Voltage Range
+6.5V to +65V
♦ Thermally Enhanced 8-Pin SO Package with
Exposed Pad Dissipates 1.5W
♦ Guaranteed 150mA Output Current
♦ 60µA No-Load Supply Current
♦ -60V Reverse-Battery Protection
♦ Preset +3.3V or +5.0V Output Voltage
♦ Thermal and Short-Circuit Protection
♦ Operate Over -40°C to +125°C Temperature Range
♦ Integrated µP Reset Circuit
♦ Watchdog Timer with 1.6s Timeout Period
(MAX5023)
♦ Regulator Enable and Hold Inputs Implement
Self-Holding Circuit
♦ SET Input for Adjustable Output Voltage
(MAX5024)
MAX5023/MAX5024
65V, Low-Quiescent-Current, High-Voltage Linear
Regulators with µP Reset and Watchdog Timer
________________________________________________________________ Maxim Integrated Products 1
N.C.
HOLDRESET
1
2
8
7
OUT
WDIEN
GND
IN
SO-EP
TOP VIEW
3
4
6
5
MAX5023
N.C.
HOLDRESET
1
2
8
7
OUT
SETEN
GND
IN
SO-EP
3
4
6
5
MAX5024
PART TEMP RANGE PIN-PACKAGE
MAX5023_ ASA -40°C to +125°C 8 SO-EP*
MAX5024_ ASA -40°C to +125°C 8 SO-EP*
Pin Configurations
Ordering Information
19-2619; Rev 2; 5/05
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.
Selector Guide and Typical Operating Circuit appear at end
of data sheet.
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.
*EP = Exposed Paddle.
MAX5023/MAX5024
65V, Low-Quiescent-Current, High-Voltage Linear
Regulators with µP Reset and Watchdog Timer
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +14V, I
OUT
= 1mA, C
IN
= 10µF, C
OUT
= 15µF, V
EN
= +2.4V, HOLD = open, 10kΩ from RESET to OUT, T
A
= -40°C to +125°C,
unless otherwise noted. Typical specifications are at T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN to GND ................................................................-60V to +70V
EN to GND ...................................................-0.3V to (V
IN
+ 0.3V)
HOLD to GND...........................................-0.3V to (V
OUT
+ 0.3V)
SET, WDI, OUT to GND .......................................-0.3V to +13.2V
RESET to GND (Open Drain)...............................-0.3V to +13.2V
Short-Circuit Duration (V
IN
≤ +14V)............................Continuous
Maximum Current to Any Pin (Except IN, OUT) ...............
±20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO-EP (derate 19.2mW/°C above +70°C) ........1538mW
Thermal Resistance:
(
θ
JA
) .............................................................................52°C/W
(θ
JC
) ...............................................................................2°C/W
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range V
IN
V
IN
must be at least 1.5V greater than V
OUT
6.5 65 V
Reverse Input Current
I
REVERSE
V
IN
= -60V 0.1 10 µA
I
OUT
= 0mA 58 140
Supply Current I
Q
M easur ed at G N D
I
OU T
= 150m A
2000
µA
Shutdown Supply Current I
SHDN
V
EN
≤ +0.4V 6 16 µA
REGULATOR
Guaranteed Output Current I
OUT
V
OUT
= +5V 150 mA
SET = GND, I
OUT
= 1mA to 150mA,
5V version
4.8 5 5.2
SET = GND, I
OUT
= 1mA to 150mA,
3.3V version
3.168
3.3
3.432
Output Voltage V
OUT
I
OUT
= 5mA, adjustable version (MAX5024)
2.5 11
V
Dropout Voltage ∆V
DO
I
LOAD
= 150mA, V
OUT
= +5V (Note 2) 0.9 1.5 V
Startup Response Time
Rising edge of V
IN
to V
OUT
, R
L
= 500Ω,
SET = GND
400 µs
+5V version -1 +1
Line Regulation
∆V
OUT
/
∆V
IN
+8V ≤ V
IN
≤ +65V
+3.3V version -0.5 0.5
mV/V
EN = high, regulator on 2.4
Enable Voltage V
EN
EN = low, regulator off 0.4
V
V
EN
= +2.4V 0.5
Enable Input Current I
EN
V
EN
= +14V 4
µA
HOLD Voltage V
IL
Regulator on, EN transition from high to low
0.4 V
HOLD Release Voltage V
IH
EN = low, regulator shuts off
V
OUT
-
0.4V
V
HOLD Pullup Current I
HOLD
Internally connected to OUT 4 µA
SET Reference Voltage V
SET
I
OUT
= 10mA
1.223 1.248 1.273
V
SET Input Leakage Current I
SET
0.5 100 nA
MAX5023/MAX5024
65V, Low-Quiescent-Current, High-Voltage Linear
Regulators with µP Reset and Watchdog Timer
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +14V, I
OUT
= 1mA, C
IN
= 10µF, C
OUT
= 15µF, V
EN
= +2.4V, HOLD = open, 10kΩ from RESET to OUT, T
A
= -40°C to +125°C,
unless otherwise noted. Typical specifications are at T
A
= +25°C.) (Note 1)
Note 1: Limits at -40°C are guaranteed by characterization and not production tested.
Note 2: Dropout voltage is defined as V
IN
- V
OUT
when V
OUT
is 100mV below the value of V
OUT
for V
IN
= V
OUT
+ 3V.
Note 3: V
OUT
= V
SET
(1 + R1 / R2) = 1.248V (1 + R1 / R2).
Note 4: RESET is guaranteed to be in the correct logic state for V
OUT
> +1V.
Note 5: Guaranteed by design, not production tested.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Load Regulation
∆V
OUT
/
∆I
OUT
I
OUT
= 1mA to 150mA 1
mV/mA
PSRR
I
OUT
= 10mA, f = 100Hz, 500mV
P-P
,
V
OUT
= +5V
54 dB
Short-Circuit Current I
SC
V
IN
= +8V 175 300 mA
Thermal-Shutdown
Temperature
T
J
(
SHDN
)
150 °C
∆T
J
(
SHDN
)
20 °C
RESET CIRCUIT
MAX502_L, SET = GND
4.50 4.625
4.75
MAX502_M, SET = GND
4.25 4.375
4.50
MAX502_T, SET = GND
2.970 3.052 3.135
MAX502_S, SET = GND
2.805 2.887 2.970
MAX5024L/T, SET = Divider
(Figure 1) (Note 3)
0.925 x
V
OUT
Reset Threshold V
TH
MAX5024M/S, SET = Divider
(Figure 1) (Note 3)
0.875 x
V
OUT
V
Reset Timeout Period t
RP
140 200 260 ms
V
OUT
to Reset Delay t
RD
V
OUT
falling 5 µs
V
OUT
≥ +1.0V, I
SINK
= 50µA,
RESET asserted
0.3
V
OUT
≥ +2.85V, I
SINK
= 1.2mA,
RESET asserted
0.3
Open-Drain RESET Output
Voltage (Note 4)
V
OL
V
OUT
≥ +4.25V, I
SINK
= 3.2mA,
RESET asserted
0.4
V
Open-Drain RESET Output-
Leakage Current
I
LKG
RESET not asserted, V
RESET
= +11V 1.0 µA
WATCHDOG FUNCTION
Watchdog Timeout Period t
WD
1.12
1.6 2.08 s
WDI Pulse Width t
WDI
(Note 5) 50 ns
V
IL
0.4
WDI Input Voltage
V
IH
2.4
V
WDI Input Current I
WDI
WDI = GND -1 +1 µA
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX5024TASA+T

Mfr. #:
Buy MAX5024TASA+T
Manufacturer:
Maxim Integrated
Description:
Linear Voltage Regulators 65V Low-Q w/uP Reset & Watchdog Timer
Lifecycle:
New from this manufacturer.
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