MAX17525 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – Robust, High-Power Protection Reduces System

MAX17525
EVALUATION KIT AVAILABLE
High-Accuracy, Adjustable Power Limiter
General Description
The MAX17525 adjustable overvoltage, undervoltage,
and overcurrent protection device guards systems against
overcurrent faults in addition to positive overvoltage and
reverse-voltage faults. When used with an optional external
pMOSFET, the device also protects downstream circuitry
from voltage faults up to ±60V (for -60V external pFET
rating. The device features a low, 31mΩ, on-resistance
integrated FET.
During startup, the devices are designed to charge large
capacitances on the output in a continuous mode for
applications where large reservoir capacitors are used
on the inputs to downstream devices. Additionally, the
devices feature a dual-stage, current-limit mode in which
the current is continuously limited to 1x, 1.5x, and 2x
the programmed limit, respectively, for a short time after
startup. This enables faster charging of large loads during
startup.
The MAX17525 also feature reverse-current and
overtemperature protection. The devices are available in
a 20-pin (5mm x 5mm) TQFN package and operate over
the -40ºC to 125ºC temperature range.
Applications
●● Industrial Power Systems
●● Control and Automation
●● Motion System Drives
●● Human Machine Interfaces
●● High-Power Applications
Benefits and Features
●● Robust, High-Power Protection Reduces System
Downtime
• Wide Operating Input Range: +5.5V to +60V
• -60V Negative Input Tolerance with External
pFET (for -(60 + V_OUT) External pFET Rating)
• Low 31mΩ (typ) R_ON
• Reverse Current-Blocking Protection with External
pFET
●● Enables Fast Startup and Brownout Recovery
• Thermal Foldback Current-Limit Protection
●● Flexible Design Enables Reuse and Less
Requalification
• Adjustable OVLO and UVLO Thresholds
• Programmable Forward Current Limit From 0.6A to
6A with ±15% Accuracy Over Full Temperature
Range
• Normal and High-Voltage Enable Inputs
(EN and HVEN)
• Protected External pFET Gate Drive
●● Saves Board Space and Reduces External BOM
Count
• 20-Pin 5mm x 5mm TQFN Package
• Integrated nFET
Ordering Information appears at end of data sheet.
Typical Application Circuit
*R1, R2, R3, AND R 4 ARE ONLY
REQURED FOR ADJUSTABLE
UVLO/OVLO FUNCTIONALITY .
OTHERWISE , TIE THE PIN TO
GND TO USE THE INTERNAL ,
PRE-PROGRAMMED
THRESHOLD .
POWER
SYSTEM
INPUT
220 kΩ
HVEN
GND
VIN
CIN
VIN
R1*
R2*
VIN
R3*
R4*
x
10kΩ
GP
UVLO
OVLO
HVEN
CLTS 2
CLTS 1
IN
IN IN IN IN
OUT
OUT
MAX17525
OUT
OUT
OUT
SETI
RIPEN
FLAG
EN
GND
CIN_IC
PROTECTED
POWER
COUT
SYSTEM
CONTROLLER
ADC
ENB
FAULT
EN
19-8572; Rev 0; 6/16