Document
19-5818; Rev 0; 3/11
MAX14586/MAX14590 High-Current Overvoltage Protectors with Adjustable OVLO
General Description
The MAX14586/MAX14590 overvoltage protection devices feature a low 48mI (typ) on-resistance (RON) internal FET and protect low-voltage systems against voltage faults up to +36V. When the input voltage exceeds the overvoltage threshold, the internal FET is turned off to prevent damage to the protected components. The overvoltage protection threshold can be adjusted with optional external resistors to any voltage between 4V and 20V. With the OVLO input set below the external OVLO select voltage, the devices automatically choose the internal accurate trip thresholds. The internal overvoltage thresholds (OVLO) are preset to 7V typical (MAX14586) or 15V typical (MAX14590). The devices are also protected against overcurrent events by an internal thermal shutdown. The MAX14586/MAX14590 are offered in a small, 8-pin TDFN package with exposed pad and operate over the -40NC to +85NC extended temperature range.
Benefits and Features
S Protect High-Power Portable Devices Wide Operating Input Voltage Protection from +2.2V to +36V 3A Continuous Current Capability Integrated 40mI (typ) n-Channel MOSFET Switch S Flexible Overvoltage Protection Design Adjustable Overvoltage Protection Trip Level Wide Adjustable OVLO Threshold Range from +4V to +20V Preset Internal Accurate OVLO Thresholds: 7V ±2.9% (MAX14586) 15V ±3.3% (MAX14590) S Additional Protection Features Increase System Reliability Soft-Start to Minimize In-Rush Current Internal 15ms Startup Debounce Thermal-Shutdown Protection S Minimize PCB Area 8-Pin TDFN (2mm x 2mm) Package
Ordering Information appears at end of data sheet.
Applications
Smartphones Tablet PCs Mobile Internet Devices
Typical Application Circuit
POWER ADAPTER
IN 1µF R1* OVLO R2* GND IN
OUT OUT
CHARGER Li-ION BATTERY
MAX14586 MAX14590
PMIC
*R1 AND R2 ARE ONLY REQUIRED FOR ADJUSTABLE OVLO; OTHERWISE, CONNECT OVLO TO GND.
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX14586.related
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Free Datasheet http://www.datasheet4u.com/
MAX14586/MAX14590 High-Current Overvoltage Protectors with Adjustable OVLO
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.) IN . ..........................................................................-0.3V to +40V OUT.............................................................-0.3V to (VIN + 0.3V) OVLO. .......................................................................-0.3V to +6V Continuous IN, OUT Current (Note 1)......................................3A Peak IN, OUT Current (10ms)..................................................5A Continuous OVLO Current...................................................50FA Note 1: Continuous current limited by thermal design.
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.
Continuous Power Dissipation (TA = +70NC) TDFN (derate 11.9mW/NC above +70NC). ....................954mW Operating Temperature Range........................... -40NC to +85NC Junction Temperature......................................................+150NC Storage Temperature Range. ............................ -65NC to +150NC Lead Temperature (soldering, 10s).................................+300NC Soldering Temperature (reflow).......................................+260NC
PACKAGE THERMAL CHARACTERISTICS (Note 2)
TDFN Junction-to-Ambient Thermal Resistance (BJA)........83.9NC/W Junction-to-Case Thermal Resistance (BJC)............... 37NC/W Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(VIN = +2.2V to +36V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VIN = +5.0V and TA = +25NC.) (Note 3) PARAMETER Input Voltage Range Input Supply Current SYMBOL VIN IIN VIN < 5V VIN rising IN Overvoltage Trip Level VIN_OVLO VIN falling IN Overvoltage Lockout Hysteresis OVLO Set Threshold Adjustable OVLO Threshold Range External OVLO Select Threshold Switch On-Resistance OVLO Clamp OUT Capacitor OVLO Input Leakage Current Thermal Shutdown Thermal Shutdown Hysteresis COUT IOVLO VOVLO_THRESH = 1.221V -100 +150 20 VOVLO_SELECT RON IOUT = 1.