MAX14571：Adjustable Overvoltage and Overcurrent Protectors with High Accuracy

Industry's Most Integrated Current-Limit and Overvoltage-Protection Solutions for Up to 40V and 4.2A

The MAX14571/MAX14572/MAX14573 adjustable overvoltage-and overcurrent-protection devices are ideal to protect systems against positive and negative input voltage faults up to ±40V and feature low 100mΩ (typ) RON FETs. The overvoltage-protector (OVP) feature protects voltages between 6V and 36V, while the undervoltage-protector (UVP) feature protects voltages between 4.5V and 24V. The overvoltage-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 19.2V (typ). The ICs also feature programmable current-limit protection up to 4.2A. Once current reaches the threshold, the MAX14571 turns off after the 20.7ms (typ) blanking time and stays off during the retry period. The MAX14572 latches off after the blanking time, and the MAX14573 limits the current continuously. In addition, these devices feature reverse current and thermal-shutdown protection. The ICs are available in a small 14-pin TSSOP (5mm × 6.5mm) package and are specified over the extended -40°C to +85°C temperature range.

Key Features

Integrated Protection Increases System Reliability
- Adjustable OVLO and UVLO Thresholds (±3% Accurate Preset Thresholds)
- Automatic Internal and External Selection
- Programmable Forward Current Limit (Adjustable Up to 4.2A) with ±15% Accuracy
- Thermal-Shutdown Protection
- 100mΩ (typ) On-Resistance FET
Special Features Facilitate Designs for Industrial Applications
- Wide 4.5V to 36V Operating Input Range
- Reverse-Current Flow Option for Inductive Loads
- Independent Microprocessor Enable Input (EN) and High-Voltage-Capable Input (HVEN)

MAX14571, MAX14572, MAX14573: Functional Diagram

Applications/Uses

Battery-Powered Applications
Consumer Electronics
Industrial Equipment
Marine Equipment

DataSheet

title	Download file
MAX14571-MAX14573 Data Sheet	MAX14571-MAX14573.pdf

Parametrics

Part Number	Channels	V_IN (V)	V_IN (V)	Internal Pwr. MOSFETs	R_ON (mΩ)	Current Limit (A)	Current Limit (A)	Current Limit Accuracy (%)	Fault Response	Reverse Current Protect.	Fault Indicator	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Channels	min	max	Internal Pwr. MOSFETs	typ	min	max	Current Limit Accuracy (%)	Fault Response	Reverse Current Protect.	Fault Indicator	Oper. Temp. (°C)	Package/Pins	See Notes
MAX14571	1	4.5	36	NMOS+PMOS	100	0.7	4.2	15	Auto Retry	Yes	Yes	-40 to +125	TSSOP-EP/14	$2.66 @1k
MAX14572									Latchoff				TSSOP-EP/14	$2.66 @1k
MAX14573									Continuous				TSSOP-EP/14	$2.76 @1k