MAX14562

19-5570; Rev 1; 8/11 36V-Capable Overvoltage Protector with Regulated Output Voltage General Description The MAX14562 protects valuable consumer circuits against voltage faults of up to +36V. This robust protection is implemented in a three-step scheme for a superior result. If the input is below the preset regulated outputvoltage (VPROV) threshold, the output tracks the input minus the voltage drop (RON x ILOAD) across the pass FET. If the input exceeds VPROV, the output is regulated to VPROV. If the input rises further and exceeds the overvoltage lockout cutoff threshold (VOVLO), the output is disconnected from the input. A low resistance 160mI (typ) FET is integrated in the MAX14562, effectively reducing the component count and application footprint. The MAX14562 also features thermal shutdown protection against a short-circuit event. The MAX14562 is specified over the extended -40NC to +85NC temperature range and is available in 8-pin TDFN (2mm x 2mm) package. S Input Voltage Protection Up to +36V S Preset Regulated Output Voltage (+5.15V typ) S Integrated 160mI (typ) N-Channel MOSFET Features MAX14562 Switch S Soft-Start to Minimize In-Rush Current S Overvoltage Cutoff Protection +8V (typ) S Thermal Shutdown Protection S -40NC to +85NC Operating Temperature Range Ordering Information PART MAX14562ETA+T TEMP RANGE -40NC to +85NC PINPACKAGE 8 TDFN-EP* TOP MARK ADI Applications Mobile Phones Smartphones Portable Media Player PDAs Digital Cameras Bluetooth Headset E-Book Mobile Internet Device +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. *EP = Exposed pad. Typical Operating Circuit CHARGER INPUT CHARGER OUTPUT SYSTEM LOAD VBUS TRAVEL ADAPTER INPUT GND IN 1µF * IN MAX14562 OUT OUT * VIO 1µF VBUS PMIC 10kΩ ACOK GND *ONLY TDFN. APIC WITH HS USB EN _______________________________________________________________ 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. 36V-Capable Overvoltage Protector with Regulated Output Voltage MAX14562 ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND.) IN .......................................................................... -0.3V to +40V OUT ........................................................................ -0.3V to +6V EN, ACOK .............................................................. -0.3V to +6V Continuous Current Through IN/OUT 8-Pin TDFN .................................................................... Q1.6A 10ms Current Through IN/OUT 8-Pin TDFN ....................................................................... Q2A Continuous Power Dissipation (TA = +70oC): 8-Pin TDFN (derate 11.9mW/NC above +70NC) .......... 953mW Operating Temperature Range ......................... -40NC to +85NC Storage Temperature Range .......................... -65NC to +150NC Junction Temperature .....................................................+150NC Lead Temperature (soldering, 10s) ...............................+300NC Soldering Temperature (reflow) .....................................+260NC 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. PACKAGE THERMAL CHARACTERISTICS (Note 1) TDFN Junction-to-Ambient Thermal Resistance (BJA) ...... 83.9NC/W Junction-to-Case Thermal Resistance (BJC) .............. 37NC/W Note 1: 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 2) PARAMETER Input Voltage Preset Regulated Output Voltage SYMBOL VIN IOUT = 0mA, VIN = 6.5V VPROV IOUT = 200mA, VIN = 6.5V IOUT = 800mA, VIN = 6V (Note 3) Output Voltage Overvoltage Lockout Cutoff Threshold Rising Overvoltage Lockout Hysteresis Input Supply Current Input Shutdown Current OUT Shutdown Current On-Resistance LDO Load Capacitance DIGITAL SIGNALS (EN, ACOK) EN Input High Voltage EN Input Low Voltage EN Input Leakage Current ACOK Output Low Voltage ACOK Leakage Current VIH VIL ILEAK VOL VEN = 0V or 5.5V VIO = 3.3V, ISINK = 1mA (see Typical Operating Circuit) VIO = 3.3V, ACOK deasserted (see Typical Operating Circuit) -200 -150 RON IIN IIN_Q VOUT VOVLO IOUT = 0mA IN rising % of typ VOVLO EN = low, VIN = 4.5V, IOUT = 0mA EN = low, VIN = 7V, IOUT = 0mA EN = high, VIN = 3V VIN = 5V, VOUT = 4V, EN = high VIN = 4.75V, IOUT = 100mA IOUT up to 0.8A 1.4 0.4 +150 0.4 +200 -1 10 VIN > VPROV VIN < VPROV (Note 4) 7.44 CONDITIONS MIN 2.2 4.85 4.75 4.75 5.15 5.15 5.15 VPROV VIN 8 1 120 300 2.5 260 550 5 +1 280 8.56 TYP MAX 36 5.45 5.45 5.45 V V V % FA FA FA mI FF V V nA V nA V UNITS V 2 36V-Capable Overvoltage Protector with Regulated Output Voltage 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 2) PARAMETER SYMBOL CONDITIONS VIN_MIN < VIN < VOVLO until charge pump turns on, see Figure 1 VIN_MIN < VIN < VOVLO to ACOK low until charge pump turns on, see Figure 1 RLOAD = 100I, CLOAD = 1FF, VOUT = 20% of VIN to 80% of VIN, see Figure 1 VIN > VOVLO to VOUT = 80% of VPROV, RLOAD = 100I, see Figure 1 MIN TYP MAX UNITS TIMING CHARACTERISTICS (Note 4) Input Debounce Time ACOK Time Turn-on Time During Soft-Start Overvoltage Turn-Off Time THERMAL PROTECTION Thermal Shutdown Thermal Hysteresis TSHDN THYST 150 20 NC NC tDEB tACOK tON tOFF 10 20 20 40 48 1 35 70 ms ms Fs Fs MAX14562 Note 2: All devices are 100% production tested at TA = +25NC. Limits over the operating temperature range are guaranteed by design and not production tested. Note 3: Thermally limited, guaranteed by design, and not production tested. Note 4: In linear mode, as IOUT increases, the OUT voltage drops due to a voltage across Q1 (see Functional Diagram). Note 5: All timing characteristics are measured using 20% and 80% levels unless otherwise specified. tOFF VOVLO VPROV IN MIN tDEB VPROV OUT tON tON tDEB tDEB IOUT EN tACOK ACOK tACOK tDEB Figure 1. Enable/Select Time 3 36V-Capable Overvoltage Protector with Regulated Output Voltage MAX14562 Typical Operating Characteristics (CIN = 1µF, COUT = 4.7µF, TA = +25°C, unless otherwise noted.) NORMALIZED ON-RESISTANCE vs. SUPPLY VOLTAGE 1.5 NORMALIZED ON-RESISTANCE 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 85 0.6 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) IN SUPPLY CURRENT vs. IN VOLTAGE MAX14562 toc01 IN SUPPLY CURRENT vs. TEMPERATURE MAX14562 toc02 VEN = 0V 180 IN SUPPLY CURRENT (µA) 160 140 120 100 80 60 40 20 VEN = 0V 250 IN SUPPLY CURRENT (µA) 200 150 100 50 0 0 10 20 IN VOLTAGE (V) 30 IOUT = 100mA LDO ABOVE 5.15V VIN = 5V VIN = 2.2V -40 -15 10 35 60 0 40 TEMPERATURE (°C) NORMALIZED ON-RESISTANCE vs. TEMPERATURE MAX14562 toc04 VPROV vs. TEMPERATURE MAX14562 toc05 OUT VOLTAGE vs. IN VOLTAGE IOUT = 100mA MAX14562 toc06 1.4 1.3 NORMALIZED ON-RESISTANCE 1.2 1.1 1.0 0.9 0.8 0.7 0.6 IOUT = 100mA EACH VIN CURVE IS NORMALIZED INDEPENDENTLY AT 25°C 5.20 5.18 5.16 5.14 5.12 5.10 VIN = 6V IOUT = 100mA 6 5 OUT VOLTAGE (V) 4 3 2 1 0 VIN = 3V VIN = 4.2V -40 -15 10 35 60 VPROV (V) 85 -40 -15 10 35 60 85 0 10 20 IN VOLTAGE (V) 30 40 TEMPERATURE (°C) TEMPERATURE (°C) NORMALIZED DEBOUNCE TIME vs. TEMPERATURE MAX14562 toc07 VOVLO vs. TEMPERATURE MAX14562 toc08 1.20 1.15 NORMALIZED DEBOUNCE TIME 1.10 1.05 1.00 0.95 0.90 0.85 0.80 -40 VIN = 5V IOUT = 100mA 8.00 7.95 VOVLO (V) 7.90 7.85 7.80 -15 10 35 60 85 -40 -15 10 35 60 85 TEMPERATURE (°C) TEMPERATURE (°C) 4 MAX14562 toc03 300 200 1.6 36V-Capable Overvoltage Protector with Regulated Output Voltage Typical Operating Characteristics (continued) (CIN = 1µF, COUT = 4.7µF, TA = +25°C, unless otherwise noted.) IN RISE TRANSIENT RESPONSE (IOUT = 10mA) 6V 4V MAX14562 MAX14562 toc09 IN FALL TRANSIENT RESPONSE (IOUT = 10mA) IN 5V/div OUT 5V/div EN 5V/div ACOK 5V/div 6V 4V MAX14562 toc10 IN 5V/div OUT 5V/div EN 5V/div ACOK 5V/div 250µs/div VPROV 4V 0V VPROV 4V 0V 0V 250µs/div 0V LOAD TRANSIENT (VEN = 0V) 5V MAX14562 toc11 LOAD TRANSIENT (VEN = 0V) IN 5V/div OUT 5V/div ACOK 5V/div IOUT 500mA/div 5V MAX14562 toc12 IN 5V/div OUT 5V/div ACOK 5V/div IOUT 500mA/div 5V 5V 0V 800mA 10mA 200ns/div 0V 800mA 10mA 200ns/div SWITCH TURN-ON TIME RESPONSE (RLOAD = 100Ω) 5V 0V 5V 0V MAX14562 toc13 SWITCH TURN-OFF TIME RESPONSE (RLOAD = 100Ω) IN 5V/div OUT 5V/div 5V 0V 5V 0V MAX14562 toc14 IN 5V/div OUT 5V/div 3.3V 0V 10ms/div ACOK 5V/div 3.3V 0V 2ms/div ACOK 5V/div 5 36V-Capable Overvoltage Protector with Regulated Output Voltage MAX14562 Typical Operating Characteristics (continued) (CIN = 1µF, COUT = 4.7µF, TA = +25°C, unless otherwise noted.) POWER-UP RESPONSE (CLOAD = 470µF) 5V 0V 5V 0V MAX14562 toc15 POWER-UP RESPONSE (CLOAD = 470µF) IN 5V/div OUT 5V/div 5V 3V 0V 5V 0V MAX14562 toc16 IN 5V/div EN 5V/div OUT 5V/div ACOK 5V/div 3.3V 0V 10ms/div ACOK 5V/div 3.3V 0V 10ms/div ACOK RESPONSE (OVERVOLTAGE CONDITION) (RLOAD = 50Ω) MAX14562 toc17 OUT SHORT SHUTDOWN (THERMAL) MAX14562 toc18 12V 6V IN 5V/div 6V 2.5A IN 5V/div IOUT 1A/div 5V 0V 3V 0V 100mA 0A 10ms/div 0A 5V OUT 5V/div ACOK 5V/div IOUT 100mA/div 0V 3V 0V 20ms/div ACOK 5V/div OUT 2V/div 6 36V-Capable Overvoltage Protector with Regulated Output Voltage Pin Configuration TOP VIEW OUT 8 OUT 7 ACOK GND 6 5 MAX14562 MAX14562 + 1 IN 2 IN 3 EN *EP 4 N.C. TDFN (2mm × 2mm) *CONNECT EXPOSED PAD TO GND. Pin Description PIN 1,2 3 4 5 6 NAME IN EN N.C. GND ACOK FUNCTION Overvoltage Protection Input. Bypass IN with a 1FF ceramic capacitor to get Q15kV HBM ESD protection. No capacitor is required for ±2kV HBM ESD protection. Externally connect both IN pins together. Active-Low Enable Input. Drive EN low to turn on the device. Drive EN high to turn off the device. No Connection. Not internally connected. Ground Open-Drain Flag Output. ACOK is driven low after input voltage is stable between minimum VIN and VOVLO after soft-start time (double of debounce time). Connect a pullup resistor from ACOK to the logic I/O voltage of the host system. Overvoltage Protection Output. Bypass OUT with a 1FF or larger ceramic capacitor (see Table 1). Externally connect both OUT pins together. Exposed Pad. Connect EP to GND. 7,8 — OUT EP 7 36V-Capable Overvoltage Protector with Regulated Output Voltage MAX14562 Functional Diagram Q1 IN OUT PROV CONTROL OVLO CONTROL HV CP BG POK PROTECTION MAX14562 ACOK INOVLO VBG TIMING AND CONTROL LOGIC EN OK EN Detailed Description The MAX14562 features the overvoltage protection to the charger input VBUS line when a travel adapter (TA) is used. In addition, the MAX14562 features a low 160mI (typ) on-resistance internal FET (Q1) and protects the low-voltage system against voltage faults up to +36V. The MAX14562 features three-step overvoltage protection. When the input is below the preset regulated output-voltage (VPROV) threshold, the output follows the input minus the voltage drop across the pass FET (RON x ILOAD). When the input exceeds VPROV, the output is regulated to VPROV. If the input rises further and exceeds the overvoltage lockout cutoff (VOVLO) threshold, the output is disconnected from the input. The MAX14562 also features thermal shutdown protection against short-circuit events. To minimize inrush current, the MAX14562 features a soft-start capability to slowly turn on Q1. starts charging) and ends when ACOK is asserted low, 15ms (typ). When the input voltage exceeds the minimum IN voltage but is below VPROV, OUT follows IN with a minimum voltage drop (RON x ILOAD) across pass FET after the debounce time, tDEB, and ACOK is asserted. The LDO mode needs a capacitor on OUT. The recommended value is 10FF for load currents up to 800mA (Table 1). Linear Mode When IN goes above the preset regulated output voltage (VPROV), Q1 provides a constant voltage of VPROV at OUT, and ACOK is asserted. Preset Regulated Output-Voltage Mode (PROV) Soft-Start Table 1. Recommended Load Capacitance LOAD CURRENT (mA) 10 50 100 800 LOAD CAP (µF) 1 2.2 4.7 10 Soft-start function permits the device to charge the load capacitor up to 1000FF by controlled current. The softstart is initiated when the debounce time ends (OUT 8 36V-Capable Overvoltage Protector with Regulated Output Voltage When IN goes above the overvoltage lockout threshold (VOVLO), OUT is disconnected from IN and ACOK is deasserted. Power dissipation increases when the input goes higher than VPROV. The overvoltage lockout threshold is set to further the power dissipation. When IN drops below VOVLO, the debounce time starts counting. After the debounce time (2 x tDEB), OUT follows IN again and ACOK is asserted. The MAX14562 features a thermal shutdown function necessary to protect the device. The device turns off and ACOK is deasserted when the junction temperature exceeds +150NC (typ). When the temperature drops 20NC (typ) below 150NC (typ), the device turns back on and Q1 is turned on after the debounce time. Overvoltage Lockout Mode (OVLO) Applications Information Bypass IN pin(s) to ground with a 1FF or larger ceramic capacitor placed as close as possible to the device. MAX14562 Power-Supply Decoupling Chip Information PROCESS: BiCMOS Thermal Shutdown Package Information For the latest package outline information and land patterns, 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+1 OUTPUT NO. 21-0168 LAND PATTERN NO. 90-0064 9 36V-Capable Overvoltage Protector with Regulated Output Voltage MAX14562 Revision History REVISION NUMBER 0 1 REVISION DATE 9/10 8/11 Initial release Removed SC70 pin information from data sheet. Added additional conditions to Preset Regulated Output Voltage parameter in the Electrical Characteristics table DESCRIPTION PAGES CHANGED — 1, 2, 3, 7, 9 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. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. 10 © Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.