MAX14606/MAX14607 Overvoltage Protectors with Reverse Bias Blocking

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1 EVALUATION KIT AVAILABLE MAX1466/MAX1467 General Description The MAX1466/MAX1467 overvoltage protection devices feature low 54mI (typ) on-resistance (RON) internal FETs 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 devices automatically choose the accurate internal trip thresholds. The internal are preset to typical 5.87V (MAX1466) or 6.8V (MAX1467). The MAX1466/MAX1467 feature reverse bias blocking capability. Unlike other overvoltage protectors, when the MAX1466/MAX1467 are disabled, the voltage applied to does not feed back into. These devices also feature thermal shutdown to protect against overcurrent events. The MAX1466/MAX1467 are specified over the extended -4NC to +85NC temperature range, and are available in 9-bump WLP packages. Applications Benefits and Features S Protect High-Power Portable Devices Wide Operating Input Voltage Protection from +2.3V to +36V 3A Continuous Current Capability Integrated 54mI (typ) nmosfet Switch S Flexible Overvoltage Protection Design Easy Paralleling ACOK Indicates Input Is in Range Preset Accurate Internal Thresholds 5.87V ±3% (MAX1466) 6.8V ±3% (MAX1467) S Additional Protection Features Increase System Reliability Capability Soft-Start to Minimize Inrush Current Internal 15ms Startup Debounce Thermal Shutdown Protection S Save Space 9-Bump, 1.3mm x 1.3mm, WLP Package Tablets Smart Phones Portable Media Players Ordering Information/Selector Guide appears at end of data sheet. Typical Operating Circuit appears at end of data sheet. Visit for product patent marking information. For related parts and recommended products to use with this part, refer to: For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit s website at ; Rev ; 12/11

2 MAX1466/MAX1467 ABSOLUTE MAXIMUM RATGS (All voltages referenced to GND.)...-.3V to +4V...-.3V to +4V V to +4V, ACOK...-.3V to +6V...-.3V to +1V Continuous Current into,... Q3A Continuous Power Dissipation (T A = +7NC) WLP (derate 11.9mW/NC above +7NC)...952mW Operating Temperature Range... -4NC to +85NC Storage Temperature Range NC to +15NC Soldering Temperature (reflow)...+26nc 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) WLP Junction-to-Ambient Thermal Resistance (B JA )...+84NC/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to ELECTRICAL CHARACTERISTICS (V = +2.3V to +36V, T A = -4NC to +85NC, unless otherwise noted. Typical values are at V = +5V, T A = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS M TYP MAX UNITS V Input Voltage V goes from low to high, ACOK goes from V high to low Input Supply Current I low, V = 5V, I = ma 7 12 FA Input Disable Current I _DIS low, V = 5V, V < V _TH 6 12 FA Input Shutdown Current I _Q high, V = 5V, V = V 6 12 FA Output Disable Current I _DIS V _TH or low, V = 5V, V > low, V = 5V, V = 5V, V < V _ 3 FA Output Shutdown Current I _SD high, V = 5V, V = 5V 5.5 FA OVP ( TO ) On-Resistance ( to ) R ON V = 5V, I = 1mA 54 1 mi MAX rising Internal Overvoltage Lockout MAX V Threshold _ MAX falling MAX V Load Capacitance C 1 FF Clamp Current V = 5.5V, V = 5V FA Open Voltage V _OP V = V V Pullup Resistance R _PU 5 ki Force Off Voltage V _TH V 2

3 MAX1466/MAX1467 ELECTRICAL CHARACTERISTICS (continued) (V = +2.3V to +36V, T A = -4NC to +85NC, unless otherwise noted. Typical values are at V = +5V, T A = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS M TYP MAX UNITS DIGITAL SIGNALS (, ACOK) Input High Voltage V IH 1.4 V Input Low Voltage V IL.4 V Input Leakage Current I _LEAK V _ or 5.5V FA ACOK Output Low Voltage V OL V IO = 3.3V, I SK = 1mA (see the Typical Operating Circuit) ACOK Leakage Current TIMG CHARACTERISTICS V ACOK_LEAK V IO = 3.3V, ACOK deasserted (see the Typical Operating Circuit).4 V FA 2.3V < V Debounce Time t < V to charge-pump on, DEB ms Figure 1 / OVP Soft-Start Time t SS 2.3V < V < V to 9% of V 3 ms OVP Turn-On Time During Soft-Start Turn-Off Time t ON t OFF V = 5V, R L = 5I, C L = 1FF, V = 2% of V to 8% of V, Figure 1 V > V 2V/Fs to V = 8% of V, R L = 5I, Figure 1 low to high to V = 8% of V, R L = 5I, Figure 1 2 ms THERMAL PROTECTION Thermal Shutdown T SHDN +15 NC Thermal Hysteresis T HYST 2 NC Note 2: All devices are 1% production tested at T A = +25NC. Limits over the operating temperature range are guaranteed by design and not production tested Fs t OFF t DEB 2.3V t DEB t DEB THERMAL SHUTDOWN t ON t ON t OFF t DEB ACOK Figure 1. Timing Diagram 3

4 (V = +5V, C = 1FF, C = 1FF, T A = +25NC, unless otherwise noted.) MAX1466/MAX1467 Typical Operating Characteristics SUPPLY CURRT (µa) SUPPLY CURRT vs. SUPPLY VOLTAGE V = 3V V = 1V T A = +25 C T A = +85 C T A = -4 C MAX1466/7 toc1 SUPPLY CURRT (µa) SUPPLY CURRT vs. SUPPLY VOLTAGE MAX1466 V = V V = 3V T A = +25 C T A = +85 C T A = -4 C MAX1466/7 toc2 SUPPLY CURRT (µa) SUPPLY CURRT vs. SUPPLY VOLTAGE V = V V = V T A = +25 C T A = +85 C T A = -4 C MAX1466/7 toc SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) PUT LEAKAGE CURRT (µa) PUT LEAKAGE CURRT vs. PUT VOLTAGE V = 3V V = V V = 6V MAX1466/7 toc4 PUT LEAKAGE CURRT (µa) PUT LEAKAGE CURRT vs. PUT VOLTAGE V = 3V V = V V = V MAX1466/7 toc5 NORMALIZED RON NORMALIZED R ON vs. TEMPERATURE I = 1mA MAX1466/7 toc V (V) V (V) TEMPERATURE ( C) NORMALIZED THRESHOLD NORMALIZED THRESHOLD vs. TEMPERATURE = OP TEMPERATURE ( C) MAX1466/7 toc7 DEBOUNCE TIME (ms) DEBOUNCE TIME vs. TEMPERATURE TEMPERATURE ( C) MAX1466/7 toc8 4

5 (V = +5V, C = 1FF, C = 1FF, T A = +25NC, unless otherwise noted.) MAX1466/MAX1467 Typical Operating Characteristics (continued) POWER-UP RESPONSE (I =.5A, C = 1µF) MAX1466/7 toc9 POWER-UP RESPONSE (I =.5A, C = 1µF) MAX1466/7 toc1 V V V V V V V V ma I 5mA/div ma I 5mA/div 1ms/div 1ms/div OVERVOLTAGE FAULT RESPONSE (MAX1466, I =.5A, C = 1µF) MAX1466/7 toc11 5V V V 5V V 5mA ma V I 5mA/div 1µs/div 5

6 MAX1466/MAX1467 Bump Configuration TOP VIEW BUMPS ON BOTTOM MAX1466 MAX A + ACOK B C I.C. GND WLP P NAME FUNCTION A1 ACOK Bump Description Open-Drain Flag Output. ACOK is driven low after input voltage is stable between minimum V and V after debounce. Connect a pullup resistor from ACOK to the logic I/O voltage of the host system. ACOK is high impedence after thermal shutdown. A2 Overvoltage Lockout Input. When forced low, it forces the pass element to be switched off. When left unconnected, the part operates normally using its internal threshold. A3 Active-Low Enable Input. Drive low to turn on the device. Drive high to turn off the device. B1, C1 Overvoltage Protection Input. Bypass with a 1FF ceramic capacitor for high Q15kV HBM ESD protection. No capacitor is required for Q2kV HBM ESD protection. Externally connect both together. B2 I.C. Internally Connected. I.C. is internally connected to ground. Leave I.C. unconnected or connect to GND. B3, C3 Overvoltage Protection Output. Bypass with a 1FF ceramic capacitor. Externally connect both together. C2 GND Ground 6

7 MAX1466/MAX1467 Functional Diagram Q1 Q2 MAX1466/MAX1467 GATE DRIVER CHARGE PUMP BG POK R1 ACOK R _OP R2 V _OP V BG TIMG AND CONTROL LOGIC OK Detailed Description The MAX1466/MAX1467 overvoltage protection (OVP) devices feature low on-resistance (RON) internal FETs (Q1+Q2) and protect low-voltage systems against voltage faults up to +36V. If the input voltage exceeds the overvoltage threshold, the output is disconnected from the input to prevent damage to the protected components. The 15ms debounce time prevents false turn-on of the internal FETs during startup. Soft-Start To minimize inrush current, the MAX1466/MAX1467 feature a soft-start capability to slowly turn on Q1 and Q2. Soft-start begins when ACOK is asserted and ends after 15ms (typ). Overvoltage Lockout () The MAX1466/MAX1467 use the internal comparator with the internally set value. When goes above the overvoltage lockout threshold (V_), is disconnected from and ACOK is deasserted. When drops below V_, the debounce time starts counting. After the debounce time, follows again and ACOK is asserted. There are a few options of ACOK and shutdown conditions to choose from with different and input combinations (Table 1). For applications that need ACOK present and OVP open, drive low and use as a digital input to enable and disable the OVP switch. Table 1. Logic Input Table Low High LOW OVP Disabled (Reverse Blocking Present) ACOK Present; I = 7FA (typ) OVP Enabled ACOK Present; I = 7FA (typ) HIGH OVP Shutdown (Reverse Blocking Present) ACOK Not Present; I = 5FA (typ) OVP Shutdown (Reverse Blocking Present) ACOK Not Present; I = 5FA (typ) 7

8 MAX1466/MAX1467 When the MAX1466/MAX1467 are in overvoltage condition, is high, is low, or thermal shutdown is on, then the switch between and is open and the two back-to-back diodes of the two series switches block reverse bias. Therefore, when the voltage is applied at the output, current does not travel back to the input. Thermal Shutdown Protection The MAX1466/MAX1467 feature thermal shutdown protection to protect the device from overheating. The device enters thermal shutdown when the junction temperature exceeds +15NC (typ), and the device is back to normal operation again after the temperature drops by approximately 2NC (typ). In thermal shutdown, the overvoltage protector is disabled and ACOK is high. Applications Information Bypass Capacitor For most applications, it is recommended to bypass to GND with a 1µF, 3V ceramic capacitor as close to the device as possible to enable ±15kV HBM ESD protection on. In addition, observe good layout practices such as placing the bypass capacitor next to the connector. IC power and ground must also be routed from the connector to the bypass capacitor and then to the MAX1466/ MAX1467. In this way, the capacitor will absorb the ESD energy and thereby protect the device from a highvoltage ESD event. Output Capacitor The slow turn-on time provides a soft-start function that allows the devices to charge an output capacitor up to 1FF without turning off due to an overcurrent condition. ESD Test Conditions ESD performance depends on a number of conditions. Contact Maxim for a reliability report that documents test methodology and results. Human Body Model ESD Protection Figure 2 shows the HBM, and Figure 3 shows the current waveform it generates when discharged into a low-impedance state. This model consists of a 1pF capacitor charged to the ESD voltage of interest, which is then discharged into the device through a 1.5kI resistor. R C 1MΩ CHARGE-CURRT- LIMIT RESISTOR R D 1.5kΩ DISCHARGE RESISTANCE AMPERES I P 1% 9% I R PEAK-TO-PEAK RGG (NOT DRAWN TO SCALE) HIGH- VOLTAGE DC SOURCE C s 1pF STORAGE CAPACITOR DEVICE UNDER TEST 36.8% 1% t RL TIME t DL CURRT WAVEFORM Figure 2. Human Body ESD Test Model Figure 3. Human Body Current Waveform 8

9 MAX1466/MAX1467 Typical Operating Circuit KRX12 OTG FROM SYSTEM TRAVEL ADAPTER 1µF MAX1467 ACOK 1µF CHARGER PMIC WIRELESS CHARGER 1µF MAX1467 V IO ACOK TO SYSTEM 9

10 MAX1466/MAX1467 Ordering Information/Selector Guide PART (V) TOP MARK P-PACKAGE MAX1466EWL+T 5.87 AJR 9 WLP MAX1467EWL+T 6.8 AJS 9 WLP Note: All devices are specified over the -4 C to +85 C operating temperature range. +Denotes a lead(pb)-free package/rohs-compliant package. T = Tape and reel. Chip Information Package Information PROCESS: BiCMOS For the latest package outline information and land patterns (footprints), go to 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 PACKAGE CODE LE NO. 9 WLP W91B LAND PATTERN NO. Refer to Application Note

11 REVISION NUMBER REVISION DATE MAX1466/MAX1467 DESCRIPTION Revision History PAGES CHANGED 12/11 Initial release cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a product. No circuit patent licenses are implied. 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. 16 Rio Robles, San Jose, CA USA Products, Inc. and the logo are trademarks of Products, Inc.

MAX14653/MAX14654/ MAX14655/MAX High-Current Overvoltage Protectors with Adjustable OVLO

MAX14653/MAX14654/ MAX14655/MAX High-Current Overvoltage Protectors with Adjustable OVLO EVALUATION KIT AVAILABLE MAX14653/MAX14654/ General Description The MAX14653/MAX14654/ overvoltage protection devices feature a low 38mΩ (typ) R ON internal FET and protect low-voltage systems against