DatasheetsPDF.com

MAX4925 Dataheets PDF



Part Number MAX4925
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description Overvoltage Protectors
Datasheet MAX4925 DatasheetMAX4925 Datasheet (PDF)

www.DataSheet4U.com 19-0810; Rev 0; 4/07 Overvoltage Protectors with External pFET General Description The MAX4923–MAX4926 overvoltage protection (OVP) controllers protect low-voltage systems against high-voltage faults of up to +28V with an appropriate external pFET. When the input voltage exceeds the overvoltage lockout (OVLO) threshold, or falls below the undervoltage lockout (UVLO) threshold, these devices turn off the pFET to prevent damage to protected components and issue a flag to notif.

  MAX4925   MAX4925


Document
www.DataSheet4U.com 19-0810; Rev 0; 4/07 Overvoltage Protectors with External pFET General Description The MAX4923–MAX4926 overvoltage protection (OVP) controllers protect low-voltage systems against high-voltage faults of up to +28V with an appropriate external pFET. When the input voltage exceeds the overvoltage lockout (OVLO) threshold, or falls below the undervoltage lockout (UVLO) threshold, these devices turn off the pFET to prevent damage to protected components and issue a flag to notify the processor of a fault condition. The typical overvoltage trip level is set to 7.18V (MAX4923), 6.16V (MAX4924), 5.65V (MAX4925), and 4.46V (MAX4926). The undervoltage trip level is set to 2.44V (typ) for all devices. The input (IN) is ESD protected to ±15kV HBM when bypassed to ground with a 1µF ceramic capacitor. All devices are offered in a small, 6-pin (1.5mm x 1.0mm) µDFN package and are specified over the extended -40°C to +85°C temperature range. o Overvoltage Protection Up to +28V o Preset 7.18V, 6.16V, 5.65V, and 4.46V Typical Overvoltage Trip Levels o Preset 2.44V Typical Undervoltage Trip Level o ±2.5% Accurate Overvoltage/Undervoltage Trip Levels o Low 13µA (typ) Supply Current o Drives External pFET o 20ms Adapter Debounce Time o Fault Flag Indicator o 6-Pin (1.5mm x 1.0mm) µDFN Package Features MAX4923–MAX4926 Applications Cell Phones Digital Still Cameras PDAs and Palmtop Devices MP3 Players INPUT +1.8V TO 28V Typical Operating Circuit P OUTPUT Pin Configuration TOP VIEW N.C 6 N.C 5 GATE 4 1μF 1 IN 4 GATE MAX4923–MAX4926 VIO 2 3 GND FLAG MA4923–MAX4926 1 IN 2 GND 3 FLAG μDFN Ordering Information/Selector Guide PART MAX4923ELT+* MAX4924ELT+ MAX4925ELT+ PIN-PACKAGE 6 μDFN 6 μDFN 6 μDFN OVLO (V) 7.18 6.16 5.65 UVLO (V) 2.44 2.44 2.44 TOP MARK LB LC LD PKG CODE L611-1 L611-1 L611-1 MAX4926ELT+ 6 μDFN 4.46 2.44 LE L611-1 Note: All devices are specified over the -40°C to +85°C operating temperature range. +Denotes lead-free package. *Future Product—contact factory for availability. ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Overvoltage Protectors with External pFET MAX4923–MAX4926 ABSOLUTE MAXIMUM RATINGS IN, GATE to GND....................................................-0.3V to +30V FLAG to GND ...........................................................-0.3V to +6V Continuous Power Dissipation (TA = +70°C) 6-µDFN (derate 2.1mW/°C above 70°C) .......................168mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature .....................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) ................................+300 °C 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 = +5V for MAX4923/MAX4924/MAX4925, VIN = +4V for MAX4926, CGATE = 500pF to IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Input Voltage Range SYMBOL VIN MAX4923 Overvoltage Lockout Level OVLO VIN rising MAX4924 MAX4925 MAX4926 MAX4923 Overvoltage Lockout Hysteresis MAX4924 MAX4925 MAX4926 Undervoltage Lockout Level Undervoltage Lockout Hysteresis IN Supply Current GATE Voltage High GATE Pulldown Current FLAG Low Voltage FLAG Leakage Current TIMING CHARACTERISTICS Debounce Time tDEB VUVLO < VIN < VOVLO, time for GATE to go low (Figure 1) VGATE = 5V to 0.5V (MAX4923/MAX4924/MAX4925) or VGATE = 4V to 0.5V (MAX4926) (Figure 1) VIN rising at 1V/µs from 5V to 8V (MAX4923/MAX4924/MAX4925) or from 4V to 7V (MAX4926) to VGATE = VIN -0.5V (Figure 1) VIN rising at 1V µs from 5V to 8V (MAX4923/MAX4924/MAX4925) or from 4V to 7V (MAX4926), to VFLAG = 2.4V, RFLAG = 10kΩ to 3V (Figure 1) 10 20 34 ms IIN VOH IPD VOL ILKG MAX4923/MAX4924/MAX4925 MAX4926 VIN > 8V, ISOURCE = 0.1mA VGATE = VIN ISINK = 1mA VFLAG = 5.5V -1 VIN 0.2 6.5 12 0.4 +1 UVLO VIN falling 2.378 CONDITIONS MIN 1.8 7.00 6.00 5.50 4.35 7.18 6.16 5.65 4.46 65 55 50 40 2.439 20 14 13 25 23 2.500 V mV µA V mA V µA mV TYP MAX 28.0 7.36 6.31 5.79 4.57 V UNITS V Gate Turn-on Time tGON 0.6 µs Gate Turn-Off Time tGOFF 5 20 µs Flag Assertion Delay tFLAG 4.5 µs Note 1: All devices are 100% tested at +25°C. Electrical limits across the full temperature range are guaranteed by design and characterization. 2 _______________________________________________________________________________________ Overvol.


MAX4924 MAX4925 MAX4926


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)