19-4459; Rev 0; 2/09 Overvoltage Protection with USB Charger Detection, LDO, and ESD Protection on D+/DThe MAX14529E/MAX14530E are overvoltage-protection devices with USB charger detection, a low-dropout (LDO) regulator, and ESD protection. These devices feature a low 35mΩ (typ) RON internal FET switch and protect low-voltage systems against voltage faults up to 28V. When the input voltage exceeds the overvoltage threshold, the internal FET switch is turned off to prevent damage to the protected components. The charger detection detects a short between the USB D+ and D- data lines. If the data lines are shorted together and a dedicated charger is attached, the phone draws more than 500mA to charge the battery. The overvoltage thresholds (OVLO) are preset to 5.75V (MAX14529E) or 6.8V (MAX14530E). The LDO output (LOUT) is powered from OUT and supplies 3.3V to the USB transceiver. The LDO features a 100mA (min) current capability and low output noise. Features ♦ Input Voltage Protection Up to 28V ♦ High-Current USB Charger Detection ♦ 3.3V, 100mA LDO ♦ Preset Overvoltage Protection Trip Level 5.75V (MAX14529E) 6.8V (MAX14530E) ♦ Integrated Low RON 35mΩ (typ) FET Switch ♦ Low-Capacitance USB High-Speed Data Line ESD Protection (3pF) ±15kV Human Body Model (HBM) ±15kV IEC 61000-4-2 Air Gap ±8kV IEC 61000-4-2 Contact ♦ Thermal-Shutdown Protection ♦ 12-Bump, 1.5mm x 2mm WLP Package ♦ -40°C to +85°C Operating Temperature Range The MAX14529E/MAX14530E feature ±15kV HBM ESD protection with low (3pF) capacitance suitable for Hi-Speed USB 2.0. Both devices are offered in a small 12-bump, 1.5mm x 2mm WLP package and operate over the -40°C to +85°C extended temperature range. Applications Cell Phones Ordering Information/ Selector Guide PINPACKAGE PART TOP MARK OVLO (V) MAX14529EEWC+T 12 WLP AAP 5.75 MAX14530EEWC+T 12 WLP AAQ 6.8 Note: Both 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. MP3 Players PDAs and Palmtop Devices Typical Operating Circuit VBUS D+ USB CONNECTOR D- IN OUT IN OUT PHONE LOAD CHARGER Pin Configuration TOP VIEW (BUMPS ON BOTTOM) 1 D+ D- 2 3 4 0.1μF + VIO MAX14529E/ MAX14530E VIO MAX14529E/MAX14530E A 10kΩ 10kΩ IN IN VOK D- OEN LEN CDET GND OUT OUT LOUT D+ VOK CDET MICROPROCESSOR OEN B LEN GND VCC LOUT 1.5kΩ 1μF VPU USB 2.0 D+ TRANSCEIVER D- C WLP 1.5mm x 2mm ________________________________________________________________ Maxim Integrated Products 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. 1 MAX14529E/MAX14530E General Description MAX14529E/MAX14530E Overvoltage Protection with USB Charger Detection, LDO, and ESD Protection on D+/DABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +30V OUT to GND .................................-0.3V to min (+12V, IN + 0.3V) OEN, LEN, VOK, CDET to GND ...............................-0.3V to +6V LOUT to GND ...........................................................-0.3V to +6V Continuous Current IN to OUT per Ball...............................1.74A Continuous Power Dissipation (TA = +70°C) 12-Bump WLP (derate 8.5mW/°C above +70°C).........678mW Junction-to-Ambient Thermal Resistance (θJA) (Note 1) ......................................................................118°C/W Operating Temperature Range ...........................-40°C to +85°C Junction Temperature .......................................-40°C to +150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C 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, go to www.maxim-ic.com/thermal-tutorial. 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. ELECTRICAL CHARACTERISTICS (VIN = 2.2V to 28V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VIN = +5V, TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 28 V OVERVOLTAGE PROTECTION Input-Voltage Range VIN 2.2 VIN rising Overvoltage Trip Level VOVLO VIN falling MAX14529E 5.6 5.75 5.9 MAX14530E 6.6 6.8 6.94 MAX14529E 5.4 MAX14530E 6.5 IN Overvoltage Lockout Hysteresis Supply Current Internal FET RON Maximum Capacitor on OUT 1 IIN RON % VOEN = 0, VLEN = 5V, 2.2V < VIN < VOVLO 95 190 VOEN = VLEN = 0, 2.2V < VIN < VOVLO 145 300 VOEN = VLEN = 5V, 2.2V < VIN < VOVLO 50 120 ILOAD = 100mA, VIN = 4.5V to 5.5V 35 COUTMAX V µA 60 mΩ 1000 µF LOW-DROPOUT REGULATOR LDO Output Voltage 3.3 3.383 V LOUT Line Regulation VLOUT VIN = 4.2V to 6V VIN = 5V 1.65 3.3 mV/V LOUT Load Regulation IOUT = 0.1mA to 100mA 0.33 0.66 mV/mA 400 mA Current Limit 3.219 100 Dropout Voltage IOUT = 50mA (Note 3) 300 LOUT Noise f = 10kHz to 100kHz, IOUT = 1mA 355 500 mV µVRMS CDET FILTER Cutoff Frequency fFILT D- Rising DC Threshold VTHFILT,R D- Falling DC Threshold VTHFILT,F 0.6 2.375 2.5 kHz 2.625 2.35 V V DIGITAL SIGNALS Open-Drain Output Low Voltage VOL VOEN = VLEN = 5V, VOK and CDET high impedance Open-Drain Leakage Current Input High Voltage 2 ISINK = 1mA VIH 1.4 _______________________________________________________________________________________ 0.4 V 1 µA V Overvoltage Protection with USB Charger Detection, LDO, and ESD Protection on D+/D(VIN = 2.2V to 28V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VIN = 5V, TA = +25°C.) (Note 2) PARAMETER SYMBOL Input Low Voltage CONDITIONS MIN TYP VIL Input Leakage Current VOEN = VLEN = 5V -1 MAX UNITS 0.4 V +1 µA TIMING CHARACTERISTICS (Figure 1) Debounce Time tINDBC 2.2V < VIN < VOVLO to VOUT = 10% of VIN 20 ms ms Switch Turn-On Time tON 2.2V < VIN < VOVLO, RL = 100Ω, VOUT = 10% to 80% of VIN, CL = 1mF 2 Switch Turn-Off Time tOFF VIN > VOVLO to VOUT = 80% of VOVLO, RL = 10Ω 1.5 Low to high 150 °C 20 °C 3.5 µs THERMAL PROTECTION Thermal Shutdown Thermal Hysteresis ESD PROTECTION D+ and D- Human Body Model ±15 IEC 61000-4-2 Air Gap ±15 IEC 61000-4-2 Contact ±8 kV Note 2: Devices are production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design. Note 3: Dropout voltage is defined as VOUT - VLOUT when VLOUT is at VLOUT(min). Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) INPUT SUPPLY CURRENT vs. INPUT VOLTAGE 50 NORMALIZED RON TA = +25°C 40 TA = -40°C 30 1.3 1.2 VIN = 3.6V 1.1 1.0 0.9 0.8 20 VIN = 5V 0.7 10 0.5 0 5 10 15 20 INPUT VOLTAGE (V) 25 30 1.04 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.6 0 1.05 MAX14529E/30E toc03 TA = +85°C 1.4 NORMALIZED OVLO THRESHOLD 60 1.5 MAX14529E/30E toc02 MAX14529E VOEN = VLEN = 3V MAX14529E/30E toc01 INPUT SUPPLY CURRENT (μA) 70 NORMALIZED OVLO THRESHOLD vs. TEMPERATURE NORMALIZED RON vs. TEMPERATURE 0.95 -40 -15 10 35 TEMPERATURE (°C) 60 85 -40 -15 10 35 60 85 TEMPERATURE (°C) _______________________________________________________________________________________ 3 MAX14529E/MAX14530E ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) LDO OUTPUT DROPOUT VOLTAGE vs. LOAD CURRENT 0.995 0.990 0.985 0.980 900 800 700 600 TA = +85°C 500 TA = +25°C 400 300 4.0 200 TA = -40°C 100 10 20 30 40 50 60 70 80 90 100 3.0 2.5 2.0 1.5 1.0 0.5 0 0 MAX14529E ILOAD = 0 3.5 LDO OUTPUT VOLTAGE (V) 1.000 MAX14529E/30E toc05 1.005 LDO OUTPUT VOLTAGE vs. INPUT VOLTAGE 1000 LDO OUTPUT DROPOUT VOLTAGE (mV) MAX14529E/30E toc04 NORMALIZED LDO OUTPUT VOLTAGE (V) 1.010 0 0 10 20 30 40 50 60 70 80 90 100 0 1 2 3 4 5 6 7 OUTPUT CURRENT (mA) LOAD CURRENT (mA) INPUT VOLTAGE (V) NORMALIZED DEBOUNCE TIME vs. TEMPERATURE POWER-UP RESPONSE OVERVOLTAGE FAULT RESPONSE MAX14529E/30E toc07 1.08 1.06 1.04 8 MAX14529E/30E toc09 MAX14529E/30E toc08 1.10 MAX14529E/30E toc06 NORMALIZED LDO OUTPUT VOLTAGE vs. OUTPUT CURRENT NORMALIZED DEBOUNCE TIME VIN 2V/div VIN 5V/div 1.02 VOUT 2V/div VOUT 5V/div 1.00 0.98 VVOK 5V/div 0.96 0.94 VVOK 5V/div VOEN 1V/div 0.92 0.90 -40 -15 10 35 60 85 5ms/div 1μs/div D+/D- INPUT LEAKAGE CURRENT vs. TEMPERATURE D+/D- INPUT VOLTAGE vs. INPUT CAPACITANCE TEMPERATURE (°C) VD+ 2V/div VD2V/div VCDET 2V/div MAX14529E/30E toc11 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 6 MAX14529E/30E toc12 MAX14529E/30E toc10 5 INPUT CAPACITANCE (pF) CDET RESPONSE D+/D- INPUT LEAKAGE CURRENT (μA) MAX14529E/MAX14530E Overvoltage Protection with USB Charger Detection, LDO, and ESD Protection on D+/D- 4 3 2 1 0.01 0 100μs/div 0 -40 -15 10 35 TEMPERATURE (°C) 4 60 85 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.5 INPUT VOLTAGE (V) _______________________________________________________________________________________ Overvoltage Protection with USB Charger Detection, LDO, and ESD Protection on D+/DPIN NAME A1, A2 IN A3 VOK FUNCTION Overvoltage-Protection Input. Bypass IN with a 1µF ceramic capacitor as close as possible to the device to obtain ±15kV HBM ESD protection. No capacitor required to obtain ±2kV HBM ESD protection. Voltage Input Good Open-Drain Output. VOK is low impedance when OEN is driven low after the debounce time is expired (2.2V < VIN < VOVLO). A4 D- B1 OEN USB Data Line with ESD Protection Overvoltage Protection Active-Low Enable Input. Drive OEN high to disconnect OUT from IN. B2 LEN Low-Dropout Active-Low Enable Input. B3 CDET Charger Detection Open-Drain Output. CDET is low if D+ and D- are shorted. B4 GND Ground C1, C2 OUT Overvoltage Switch Output. Bypass OUT with a 0.1µF ceramic capacitor as close as possible to the device. C3 LOUT Low-Dropout Power Output. Bypass LOUT with a 1µF ceramic capacitor as close as possible to the device. C4 D+ USB Data Line with ESD Protection OVLO tOFF IN 80% VOVLO tON 80% VIN 10% VIN OUT tINDBC tINDBC Figure 1. MAX14529E/MAX14530E Timing Diagram _______________________________________________________________________________________ 5 MAX14529E/MAX14530E Pin Description MAX14529E/MAX14530E Overvoltage Protection with USB Charger Detection, LDO, and ESD Protection on D+/DDetailed Description The MAX14529E/MAX14530E are overvoltage-protection devices with USB charger detection, a low-dropout (LDO) regulator, and ESD protection. These devices feature a low RON internal FET switch and protect lowvoltage systems against voltage faults up to 28V. When the input voltage exceeds the overvoltage threshold, the internal FET switch is turned off to prevent damage to the protected components. The 20ms debounce time prevents false turn-on of the internal FET switch during startup. Functional Diagram IN OUT CHARGE PUMP OEN VREF CONTROL LOGIC VOK 3.3V LDO LEN D+ LOUT CDET D- MAX14529E/ MAX14530E 6 _______________________________________________________________________________________ Overvoltage Protection with USB Charger Detection, LDO, and ESD Protection on D+/D- Overvoltage Lockout (OVLO) The MAX14529E has a 5.75V (typ) overvoltage threshold (OVLO), while the MAX14530E has a 6.8V (typ) OVLO. inductance due to long lead length, take care to prevent overshoots due to the LC tank circuit and provide protection. ESD Test Conditions ESD performance depends on a number of conditions. The MAX14529E/MAX14530E are specified for ±15kV HBM typical ESD protection on the D+, D-, and IN pins when IN is bypassed to ground with a 1µF ceramic capacitor. Human Body Model Figure 2 shows the Human Body Model, and Figure 3 shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest that is then discharged into the device through a 1.5kΩ resistor. Low Dropout The low-dropout regulator (LOUT) is powered from input voltage and supplies 3.3V (typ) to the USB transceiver. If a lithium-ion (Li+) battery is used to power the USB transceiver, a boost converter is needed. The LDO features a minimum 100mA current capability and low output noise. Drive LEN high to disable the LDO. Charger Detection The charger detection detects if there is a short between the USB D+ and D- data lines. If the data lines are shorted together and a dedicated charger is attached, the phone draws more than 500mA to charge the battery; CDET asserts low. If the data lines are not biased properly, then an unidentified device is present and the phone draws no more than 500mA or does not charge at all, depending on its USB compliance level. RC 1MΩ CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 100pF RD 1500Ω DISCHARGE RESISTANCE DEVICE UNDER TEST STORAGE CAPACITOR Figure 2. Human Body ESD Test Model Thermal-Shutdown Protection The MAX14529E/MAX14530E feature thermalshutdown circuitry. The internal switch turns off when the junction temperature exceeds +150°C (typ) and immediately goes into a fault mode. The device exits thermal shutdown after the junction temperature cools by 20°C (typ). Applications Information IN Bypass Capacitor Bypass IN to GND with a 1µF ceramic capacitor as close as possible to the device for ±15kV HBM ESD protection on IN. No capacitor required to obtain ±2kV HBM protection. If the power source has significant IP 100% 90% IR PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES 36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM Figure 3. Human Body Current Waveform _______________________________________________________________________________________ 7 MAX14529E/MAX14530E Device Operation The MAX14529E/MAX14530E have an internal oscillator and charge pump that control the turn-on of the internal FET switch. The internal oscillator controls the timers that enable the turn-on of the charge pump and controls the state of the open-drain VOK output. If VIN > VOVLO, the internal oscillator remains off, thus disabling the charge pump. If 2.2V < VIN < VOVLO, the internal charge pump is enabled. The charge-pump turns on the internal FET switch and asserts VOK. At any time, if VIN drops below 2.2V or rises above VOVLO, VOK goes high and the charge pump is disabled, disconnecting OUT from IN. IEC 61000-4-2 The IEC 61000-4-2 standard covers ESD testing and performance of finished equipment. It does not specifically refer to integrated circuits. The MAX14529E/ MAX14530E are specified for ±15kV Air-Gap Discharge and ±8kV Contact Discharge IEC 61000-4-2 on the D+ and D- pins. The main difference between tests done using the Human Body Model and IEC 61000-4-2 is higher peak current in IEC 61000-4-2. Because series resistance is RC 50MΩ to 100MΩ CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF lower in the IEC 61000-4-2 ESD test model (Figure 4), the ESD-withstand voltage measured to this standard is generally lower than that measured using the Human Body Model. Figure 5 shows the current waveform for the ±8kV IEC 61000-4-2 Level 4 ESD Contact Discharge test. The Air-Gap Discharge test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized. RD 330Ω I 100% 90% DISCHARGE RESISTANCE STORAGE CAPACITOR IPEAK MAX14529E/MAX14530E Overvoltage Protection with USB Charger Detection, LDO, and ESD Protection on D+/D- DEVICE UNDER TEST 10% tR = 0.7ns to 1ns 30ns t 60ns Figure 4. IEC 61000-4-2 ESD Test Model Figure 5. IEC 61000-4-2 ESD Generator Current Waveform Chip Information PROCESS: BiCMOS 8 _______________________________________________________________________________________ Overvoltage Protection with USB Charger Detection, LDO, and ESD Protection on D+/D- PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 12 WLP W121B2+1 21-0009 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 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX14529E/MAX14530E Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.