MAX14586

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  Continuous Current Capability 3A  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 ����������������������������������������������������������������� Maxim Integrated Products 1 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. 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 = 100mA, TA = +25°C, VIN = 5V IOUT = 100mA, TA = -40°C to +85°C ICLAMP = 10FA, VIN = 5V 3.6 1000 +100 VIN_OVLO_HYS VOVLO_THRESH 1.18 4 0.25 0.35 48 MAX14586 MAX14590 MAX14586 MAX14590 6.8 14.5 6.73 14.35 CONDITIONS MIN 2.2 65 7 15 6.93 14.85 1 1.223 1.26 20 0.4 81 115 TYP MAX 36 120 7.2 15.5 7.13 15.35 % V V V mI V FF nA NC NC V UNITS V FA ����������������������������������������������������������������� Maxim Integrated Products 2 *The parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet. MAX14586/MAX14590 High-Current Overvoltage Protectors with Adjustable OVLO ELECTRICAL CHARACTERISTICS* (continued) (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 SYMBOL CONDITIONS Time from 2.2V < VIN < VIN_OVLO to VOUT = 10% of VIN Soft-start time beginning from VOUT = 10% of VIN to soft-start off 2.2V < VIN < VIN_OVLO, RLOAD = 100I, CLOAD = 100FF; VOUT from 10% to 90% of VIN 2.2V < VIN < VIN_OVLO, RLOAD = 100I, CLOAD = 1mF; VOUT from 10% to 90% of VIN VIN > VOVLO_THRESH to VOUT = 80% of VIN_OVLO; RLOAD = 100I, VIN rising at 2V/Fs MIN TYP MAX UNITS TIMING CHARACTERISTICS (Figure 1) Debounce Time Soft-Start Time tINDBC tSS 15 15 ms ms 1.48 ms 5.24 Switch Turn-On Time tON Switch Turn-Off Time tOFF 0.8 3.5 Fs Note 3: All specifications are 100% production tested at TA = +25NC, unless otherwise noted. Specifications are over -40NC to +85NC and are guaranteed by design. OVLO 2.2V IN tON 90% OUT 10% tINDBC tSS VIN_OVLO 80% VIN_OVLO tON 90% 10% tINDBC tSS tOFF NOTE: WAVEFORMS ARE NOT TO SCALE. Figure 1. Timing Diagram ����������������������������������������������������������������� Maxim Integrated Products 3 *The parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet. MAX14586/MAX14590 High-Current Overvoltage Protectors with Adjustable OVLO Typical Operating Characteristics (VIN = +5.0V, CIN = 1FF, COUT = 1FF, TA = +25NC, unless otherwise noted.) IN SUPPLY CURRENT vs. IN VOLTAGE MAX14586 toc01 NORMALIZED RON vs. TEMPERATURE 1.4 1.3 NORMALIZED RON 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 OVLO = GND (MAX14586) TA = +85°C TA = +25°C IOUT = 100mA VIN = 3.6V 350 IN SUPPLY CURRENT (µA) 300 250 200 150 100 50 0 0 7 14 VIN = 5V TA = -40°C 21 28 -40 -15 10 35 60 85 IN VOLTAGE (V) TEMPERATURE (°C) NORMALIZED OVLO THRESHOLD vs. TEMPERATURE NORMALIZED EXTERNAL OVLO SET THRESHOLD MAX14586 toc03 NORMALIZED EXTERNAL OVLO SET THRESHOLD vs. TEMPERATURE 1.04 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.95 -40 -15 10 35 60 85 TEMPERATURE (°C) 1.04 NORMALIZED OVLO THRESHOLD 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.95 -40 -15 10 35 60 VIN = 6V 85 TEMPERATURE (°C) NORMALIZED EXTERNAL OVLO SELECT THRESHOLD NORMALIZED EXTERNAL OVLO SELECT THRESHOLD vs. TEMPERATURE MAX14586 toc05 NORMALIZED DEBOUNCE TIME vs. TEMPERATURE 1.4 NORMALIZED DEBOUNCE TIME 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 MAX14586 toc06 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 -40 -15 10 35 60 1.5 85 -40 -15 10 35 60 85 TEMPERATURE (°C) TEMPERATURE (°C) ����������������������������������������������������������������� Maxim Integrated Products 4 MAX14586 toc04 1.05 1.05 MAX14586 toc02 400 1.5 MAX14586/MAX14590 High-Current Overvoltage Protectors with Adjustable OVLO Typical Operating Characteristics (continued) (VIN = +5.0V, CIN = 1FF, COUT = 1FF, TA = +25NC, unless otherwise noted.) POWER-UP RESPONSE (IOUT = 0.5A, COUT = 100µF) POWER-UP RESPONSE (IOUT = 0.5A, COUT = 1000µF) MAX14586 toc07 MAX14586 toc08 0V VIN 5V/div VOUT 5V/div IOUT 500mA/div 0V VIN 5V/div VOUT 5V/div IOUT 500mA/div 0V 0V 0mA 10ms/div 0mA 10ms/div OVERVOLTAGE FAULT RESPONSE (IOUT = 0.5A, COUT = 100µF) MAX14586 toc09 0V VIN 5V/div 0V VOUT 5V/div IOUT 500mA/div 0mA 10µs/div ����������������������������������������������������������������� Maxim Integrated Products 5 MAX14586/MAX14590 High-Current Overvoltage Protectors with Adjustable OVLO Pin Configuration TOP VIEW OUT 8 OUT 7 GND 6 I.C. 5 MAX14586 MAX14590 + *EP 1 IN 2 IN 3 OVLO 4 I.C. TDFN (2mm x 2mm) *CONNECT EXPOSED PAD TO GND. Pin Description PIN 1, 2 NAME IN FUNCTION Voltage Input. Bypass IN with a 1FF ceramic capacitor as close as possible to the device to obtain Q15kV Human Body Model (HBM) ESD protection. Connect both IN pins together for proper operation. IN is protected to Q2kV HBM when IN is not bypassed with a capacitor to GND. External OVLO Adjustment. Connect OVLO to GND when using the internal threshold. Connect a resistordivider to OVLO to set a different OVLO threshold; this external resistor-divider is completely independent from the internal threshold. Internally Connected. Connect I.C. to GND or leave I.C. unconnected. Ground Output Voltage. Output of internal switch. Connect both OUT pins together for proper operation. Exposed Pad. Connect EP to ground. For enhanced thermal dissipation, connect EP to a copper area as large as possible. Do not use EP as the only ground connection. 3 4, 5 6 7, 8 — OVLO I.C. GND OUT EP ����������������������������������������������������������������� Maxim Integrated Products 6 MAX14586/MAX14590 High-Current Overvoltage Protectors with Adjustable OVLO Functional Diagram IN IN OUT OUT MAX14586 MAX14590 TEMPERATURE FAULTS VBG REFERENCE OVLO SEL CHARGE PUMP LOGIC CONTROL GND Detailed Description The MAX14586/MAX14590 overvoltage protection devices feature a low on-resistance (RON) internal FET and protect low-voltage systems against voltage faults up to +36V. If the input voltage exceeds the overvoltage threshold, the internal FET is turned off to prevent damage to the protected components. The 15ms debounce time prevents false turn-on of the internal FET during startup. The devices have timing logic that controls the turn-on of the internal FET. If VIN < VOVLO_THRESH, the internal charge pump is enabled. The charge-pump startup, after a 15ms debounce delay, turns on the internal FET (see the Functional Diagram). After the debounce time, softstart limits the FET inrush current for 15ms (typ). At any time, if VIN rises above VOVLO_THRESH, OUT is disconnected from IN. The MAX14586 has a 7V (typ) overvoltage threshold. The MAX14590 has a 15V (typ) overvoltage threshold. The devices feature thermal shutdown circuitry. The internal FET turns off when the junction temperature exceeds +150NC (typ). The device exits thermal shutdown after the junction temperature cools by 20NC (typ). Overvoltage Lockout (OVLO) Thermal Shutdown Protection Device Operation Applications Information For most applications, bypass IN to GND with a 1FF ceramic capacitor as close as possible to the device to enable Q15kV (HBM) ESD protection on IN. If Q15kV (HBM) ESD is not required, there is no capacitor required at IN. If the power source has significant inductance due to long lead length, take care to prevent overshoots due to the LC tank circuit and provide protection if necessary to prevent exceeding the +40V absolute maximum rating on IN. The slow turn-on time provides a soft-start function that allows the devices to charge an output capacitor up to 1000FF without turning off due to an overcurrent condition. IN Bypass Capacitor Internal Switch The devices incorporate an internal FET with a 48mI (typ) RON. The FET is internally driven by a charge pump that generates a necessary gate voltage above IN. The internal FET can pass more than 5A inrush current. OUT Output Capacitor ����������������������������������������������������������������� Maxim Integrated Products 7 MAX14586/MAX14590 High-Current Overvoltage Protectors with Adjustable OVLO RC 1MΩ CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE RD 1.5kΩ DISCHARGE RESISTANCE DEVICE UNDER TEST IP 100% 90% AMPERES 36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM IR PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) Cs 100pF STORAGE CAPACITOR Figure 2a. Human Body ESD Test Model Figure 2b. Human Body Current Waveform If OVLO is connected to ground, the internal OVLO comparator uses the internally set OVLO value. External OVLO Adjustment Functionality Ordering Information/ Selector Guide PART MAX14586ETA+T MAX14590ETA+T PIN-PACKAGE 8 TDFN-EP* 8 TDFN-EP* TOP MARK BNJ BNK OVLO (V) 7 15 If an external resistor-divider is connected to OVLO and VOVLO exceeds the OVLO select voltage (VOVLO_SELECT), the internal OVLO comparator reads the IN fraction fixed by the external resistor-divider. R1 = 1MI is a good starting value for minimum current consumption. Since VIN_OVLO, VOVLO_THRESH, and R1 are known, R2 can be calculated from the following formula:  R1 VIN_OVLO = VOVLO_THRESH × 1 +   R2  This external resistor-divider is completely independent from the internal resistor-divider. ESD performance depends on a number of conditions. Note: All devices are specified over the -40°C to +85°C operating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. *EP = Exposed pad. Chip Information PROCESS: BiCMOS ESD Test Conditions Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE 8 TDFN-EP PACKAGE CODE T822+2 OUTLINE NO. 21-0168 LAND PATTERN NO. 90-0065 The devices are specified for Q15kV (HBM) typical ESD resistance on IN when IN is bypassed to ground with a 1FF ceramic capacitor. Figure 2a shows the HBM and Figure 2b shows the current waveform it generates when discharged into a low-impedance state. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the device through a 1.5kI resistor. Human Body Model ESD Protection ����������������������������������������������������������������� Maxim Integrated Products 8 MAX14586/MAX14590 High-Current Overvoltage Protectors with Adjustable OVLO Revision History REVISION NUMBER 0 REVISION DATE 3/11 Initial release DESCRIPTION PAGES CHANGED — Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 9 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.