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4.2V to 36V, 1A Current Limiter with
OV, UV, Reverse Voltage Protection
MAX17523/MAX17523A
General Description
Benefits and Features
● Industrial Power Protection Increases Robustness
The Olympus series of ICs are the industry’s smallest
and robust integrated system protection solutions. The
MAX17523/MAX17523A adjustable overvoltage and over-
current protection devices are ideal for protecting systems
against positive and negative input voltage faults up to
• Wide Input Supply Range: +4.5V to +36V
(MAX17523), +4.2V to +36V (MAX17523A)
• Negative Input Tolerance to -36V
• Low R
190mΩ (typ)
ON
±40V, and feature low 190mΩ (typ) R
integrated FETs.
ON
• Reverse Current Flow Control Input
The adjustable overvoltage range in MAX17523 is between
6V and 36V, while the adjustable undervoltage range is
between 4.4V and 24V. The adjustable overvoltage range
in MAX17523A is between 6V and 36V, while the adjustable
undervoltage range is between 4.2V and 24V. The over-
voltage-lockout (OVLO) and undervoltage-lockout (UVLO)
thresholds are set using optional external resistors. The
factory preset internal OVLO threshold is 33V (typ), and the
preset internal UVLO threshold is 19V (typ).
• Thermal Overload Protection
• Extended -40°C to +125°C Temperature Range
● Flexible Design Options Eases Designs
• Adjustable OVLO and UVLO Thresholds
• Programmable Forward-Current Limit: 0.15A to 1A
• Programmable Overcurrent Fault Response:
Autoretry, Latch-Off, and Continuous
• Dual Enable Inputs: EN and High Voltage HVEN
The MAX17523/MAX17523A also feature programmable
current-limit protection up to 1A. The devices can be set
for autoretry, latch-off, or continuous fault response when
an overcurrent event occurs. Once current reaches the
threshold, the MAX17523/MAX17523A turn off after 21ms
(typ) blanking time, and stay off during the retry period
when set to autoretry mode. The devices latch off after the
blanking time when set to latch-off mode. The devices limit
the current continuously when set to continuous mode. The
MAX17523/MAX17523A also feature reverse current and
thermal shutdown protection.
● Saves Space
• 16-Pin, 3mm x 3mm, TQFN Package
Applications
● Sensor Systems
● Condition Monitoring
● Factory Sensors
● Process Analytics
● Process Instrumentation
● Weighing and Batching Systems
The MAX17523 and MAX17523A are available in a small,
16-pin (3mm x 3mm) TQFN package. The MAX17523/
MAX17523A operate over the -40°C to +125°C extended
temperature range.
Ordering Information appears at end of data sheet.
Typical Application Circuit
V
POWER
IN
IN
OUT
OUT
0.47µF
4.7µF
RIEN
EN
100kΩ
R3
R1
SYSTEM
V
IO
SYSTEM
POWER
SUPPLY
MAX17523/
MAX17523A
OPTIONAL FOR
HIGH INPUT
SURGE
HVEN
GND
UVLO
OVLO
SETI
FLAG
CLHS
APPLICATIONS
CLTS1
CLTS2
R4
R2
RSETI
CLTS_MODE
HVEN
GND
19-8450; Rev 5; 2/22
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