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MAX8842 Dataheets PDF



Part Number MAX8842
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description ultra-low-noise low-dropout linear regulators
Datasheet MAX8842 DatasheetMAX8842 Datasheet (PDF)

www.DataSheet4U.com 19-0629; Rev 0; 10/06 Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in µDFN General Description The MAX8840/MAX8841/MAX8842 ultra-low-noise, lowdropout (LDO) linear regulators are designed to deliver up to 150mA continuous output current. These regulators achieve a low 120mV dropout for 120mA load current. The MAX8840 uses an advanced architecture to achieve ultra-low output voltage noise of 11µVRMS and PSRR of 54dB at 100kHz. The MAX8841 does not require.

  MAX8842   MAX8842



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www.DataSheet4U.com 19-0629; Rev 0; 10/06 Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in µDFN General Description The MAX8840/MAX8841/MAX8842 ultra-low-noise, lowdropout (LDO) linear regulators are designed to deliver up to 150mA continuous output current. These regulators achieve a low 120mV dropout for 120mA load current. The MAX8840 uses an advanced architecture to achieve ultra-low output voltage noise of 11µVRMS and PSRR of 54dB at 100kHz. The MAX8841 does not require a bypass capacitor, hence achieving the smallest PC board area. The MAX8842 output voltage can be adjusted with an external divider. The MAX8840/MAX8841 are preset to a variety of voltages in the 1.5V to 4.5V range. Designed with a p-channel MOSFET series pass transistor, the MAX8840/MAX8841/ MAX8842 maintain very low ground current (40µA). The regulators are designed and optimized to work with low-value, low-cost ceramic capacitors. The MAX8840 requires only 1µF (typ) of output capacitance for stability with any load. When disabled, current consumption drops to below 1µA. The MAX8840/MAX8841/MAX8842 are available in a tiny 1mm x 1.5mm x 0.8mm µDFN. Features ♦ Space-Saving 1.0mm x 1.5mm x 0.8mm µDFN ♦ 11µVRMS Output Noise at 100Hz to 100kHz Bandwidth (MAX8840) ♦ 78dB PSRR at 1kHz (MAX8840) ♦ 120mV Dropout at 120mA Load ♦ Stable with 1µF Ceramic Capacitor for Any Load ♦ Guaranteed 150mA Output ♦ Only Need Input and Output Capacitors (MAX8841) ♦ Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 3V, 3.3V, 4.5V (MAX8840/MAX8841) and Adjustable (MAX8842) ♦ Low 40µA Ground Current ♦ Excellent Load/Line Transient ♦ Overcurrent and Thermal Protection MAX8840/MAX8841/MAX8842 Ordering Information PART* MAX8840ELTxy+T MAX8841ELTxy+T** MAX8842ELT+T** TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 6 µDFN-6 1.5mm x 1.0mm 6 µDFN-6 1.5mm x 1.0mm 6 µDFN-6 1.5mm x 1.0mm Applications Cellular and Cordless Phones PDA and Palmtop Computers Base Stations Bluetooth Portable Radios and Accessories Wireless LANs Digital Cameras Personal Stereos Portable and Battery-Powered Equipment *xy is the output voltage code (see the Output Voltage Selector Guide). Other versions between 1.5V and 4.5V are available in 100mV increments. Contact factory for other versions. **Future product—contact factory for availability. +Denotes lead-free package. Output Voltage Selector Guide appears at end of data sheet. Typical Operating Circuits TOP VIEW INPUT 2V TO 6V CIN 1μF ON OFF IN OUT OUTPUT PRESET 1.5V TO 4.5V CBP 10nF BP SHDN GND COUT 1μF Pin Configuration IN 1 6 OUT MAX8840 GND 2 MAX8840 MAX8841 MAX8842 5 N.C. BP (MAX8840) 4 N.C. (MAX8841) FB (MAX8842) SHDN 3 Typical Operating Circuits continued at end of data sheet. μDFN (1.5mm x 1.0mm) 1 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’.


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