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5.5V to 60V, 6A Current-Limiter with OV,
UV, Reverse Protection, and Power Limit
MAX17526A/MAX17526B/
MAX17526C
General Description
Benefits and Features
● Robust Protection Reduces System Downtime
The Olympus series of ICs are the industry's smallest
and robust integrated system protection solutions. The
MAX17526A adjustable power limiter offers a unique
feature to limit power drawn from supplies or delivered to
loads, amongst a host of protection features. These pro-
tection features include adjustable input overvoltage and
undervoltage protection, positive and negative input volt-
age protection, overcurrent protection, reverse-current
protection and overtemperature protection. The device
• Wide Input-Supply Range: +5.5V to +60V
• Active Power Limit to Protect Supply or Load
(MAX17526A)
• Programmable Input Overvoltage Setting up to 40V
• Negative Input Fault Tolerant (with External NFET)
• Reverse Current Protection (with External NFET)
• Low R
Internal NFET (30mΩ typ)
ON
features a built-in low R
integrated gate drive for an optional external NFET.
(30mΩ typ) NFET, and an
ON
● Dual-Stage Current Limiting
• 1.0x Startup Current (MAX17526A)
• 1.5x Startup Current (MAX17526B)
• 2.0x Startup Current (MAX17526C)
The device highlights a power limit feature that allows
programmed reduction in current limit, as an inverse func-
tion of an external voltage. Input or output power limit is
achieved by limiting the current through the device as a
function of input or output voltages.
● Fast Startup and Brownout Recovery
• Continuous Current-Limit During Startup
Input undervoltage protection level is adjustable between
5.5V and 24V, and input overvoltage protection level is
adjustable between 6V and 40V. The input undervolt-
age lockout (UVLO) threshold and overvoltage lockout
(OVLO) threshold are adjusted using external resistors.
The device offers a factory preset internal UVLO and
OVLO thresholds at 12.4V (typ) and 36.2V (typ) respec-
tively. The factory preset levels can be invoked by con-
necting the UVLO and/or the OVLO pins to GND.
• Thermal Foldback Current-Limit
● Flexible Design to Maximize Reuse and Minimize
Requalification
• Adjustable UVLO and OVLO Thresholds
• Programmable Forward-Current Limit: 0.2A to 0.6A
with ±10% Accuracy and 0.6A to 6.0A with ±8.5%
Accuracy Over Full Temperature Range
• Programmable Overcurrent Response: Continuous,
Autoretry, and Latch-Off Modes
• Logic Level and High-Voltage Enable Inputs
(EN and HVEN)
• Protected External NFET Gate Drive
The device features programmable current limit protec-
tion up to 6A. Current limit threshold is programmed by
connecting a resistor from the SETI pin to GND. When
the device current reaches the programmed threshold,
the controller inside the device prevents further increase
in current by modulating the internal NFET resistance.
The device offers three different behavioral modes under
current limited operation: Continuous mode, Autoretry
mode, and Latch-off mode. The continuous current limit
feature offers control of inrush current at startup while
charging high capacitances at the output side. Two addi-
tional part options that feature a dual-stage current-limit
mode, in which the current is continuously limited to 1.5x
(MAX17526B) and 2.0x (MAX17526C), the programmed
limits, are available upon request. The power limit feature
is disabled in the MAX17526B/C part options. The voltage
appearing on the SETI pin is proportional to the instan-
taneous current flowing through the device, and can be
read by the supervisory system.
● Reduced Solution Footprint
• 20-Pin 5mm x 5mm TQFN-EP Package
• Integrated NFET for Common-Use Protection
Requirements
Applications
● Industrial Power Distribution Systems
● Control and Automation
● Motion Control Drives
● Human Machine Interfaces
Ordering Information appears at end of data sheet.
MAX17526A also offers reverse-current protection and
input reverse voltage polarity protection when deployed
with an external NFET, and built-in overtemperature
protection. It is available in a 20-pin 5mm x 5mm TQFN-
EP package. The device operates over -40°C to +125°C
extended temperature range.
19-100358; Rev 5; 9/23
One Analog Way, Wilmington, MA 01887 U.S.A.
|
Tel: 781.329.4700
|
© 2023 Analog Devices, Inc. All rights reserved.
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