MAX8840/MAX8841/ MAX8842 Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in DFN General Description Features The MAX8840/MAX8841/MAX8842 ultra-low-noise, low- Space-Saving 1.0mm x 1.5mm x 0.8mm DFN dropout (LDO) linear regulators are designed to deliver 11V Output Noise at 100Hz to 100kHz RMS up to 150mA continuous output current. These regula- Bandwidth (MAX8840) tors achieve a low 120mV dropout for 120mA load cur- 78dB PSRR at 1kHz (MAX8840) rent. The MAX8840 uses an advanced architecture to 120mV Dropout at 120mA Load achieve ultra-low output voltage noise of 11V and RMS PSRR of 54dB at 100kHz. Stable with 1F Ceramic Capacitor for Any Load The MAX8841 does not require a bypass capacitor, Guaranteed 150mA Output hence achieving the smallest PC board area. The Only Need Input and Output Capacitors (MAX8841) MAX8842 output voltage can be adjusted with an exter- Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, nal divider. 2.85V, 3V, 3.3V, 4.5V (MAX8840/MAX8841) and The MAX8840/MAX8841 are preset to a variety of volt- Adjustable (MAX8842) ages in the 1.5V to 4.5V range. Designed with a p-channel Low 40A Ground Current MOSFET series pass transistor, the MAX8840/MAX8841/ MAX8842 maintain very low ground current (40A). Excellent Load/Line Transient The regulators are designed and optimized to work with Overcurrent and Thermal Protection low-value, low-cost ceramic capacitors. The MAX8840 requires only 1F (typ) of output capacitance for stability Ordering Information with any load. When disabled, current consumption drops to below 1A. PART* TEMP RANGE PIN-PACKAGE The MAX8840/MAX8841/MAX8842 are available in a tiny 6 DFN-6 MAX8840ELTxy+T -40C to +85C 1.0mm x 1.5mm x 0.8mm DFN. 1.5mm x 1.0mm 6 DFN-6 Applications MAX8841ELTxy+T -40C to +85C 1.5mm x 1.0mm Cellular and Cordless Phones 6 DFN-6 PDA and Palmtop Computers MAX8842ELT+T -40C to +85C 1.5mm x 1.0mm Base Stations *xy is the output voltage code (see the Output Voltage Selector Bluetooth Portable Radios and Accessories Guide). Other versions between 1.5V and 4.5V are available in Wireless LANs 100mV increments. Contact factory for other versions. Digital Cameras +Denotes lead-free package. Personal Stereos Portable and Battery-Powered Equipment Output Voltage Selector Guide appears at end of data sheet. Typical Operating Circuits Pin Configuration TOP VIEW INPUT OUTPUT PRESET 2V TO 6V 1.5V TO 4.5V 1 6 OUT IN IN OUT C BP MAX8840 C MAX8840 IN 10nF 1F MAX8841 5 N.C. GND 2 BP MAX8842 ON SHDN C OUT OFF BP (MAX8840) GND 1F 3 4 N.C. (MAX8841) SHDN FB (MAX8842) DFN (1.5mm x 1.0mm) Typical Operating Circuits continued at end of data sheet. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-0629 Rev 1 1/07MAX8840/MAX8841/MAX8842 Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in DFN ABSOLUTE MAXIMUM RATINGS IN to GND.................................................................-0.3V to +7V ..................................................................................477C/W JA Output Short-Circuit Duration ............................................Infinite Operating Temperature Range ...........................-40C to +85C OUT, SHDN to GND ......................................-0.3V to (IN + 0.3V) Junction Temperature......................................................+150C FB, BP, N.C. to GND..................................-0.3V to (OUT + 0.3V) Storage Temperature Range .............................-65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A 6-Pin DFN (derate 2.1mW/C above +70C) .............0.168W 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 (V = V + 0.5V, T = -40C to +85C, unless otherwise noted. C = 1F, C = 1F, C = 10nF. Typical values are at +25C IN OUT A IN OUT BP the MAX8842 is tested with 2.45V output, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V 26V IN I = 1mA, T = +25C -1 +1 OUT A Output Voltage Accuracy I = 100A to 80mA, T = +25C -2 +2 % OUT A I = 100A to 80mA -3 +3 OUT Maximum Output Current I 150 mA OUT Current Limit I OUT = 90% of nominal value 150 200 300 mA LIM V 3V, I = 80mA 80 170 OUT OUT V 3V, I = 120mA 120 OUT OUT 2.5V V < 3V, I = 80mA 90 200 OUT OUT Dropout Voltage (Note 2) mV 2.5V V < 3V, I = 120mA 135 OUT OUT 2V V < 2.5V, I = 80mA 120 250 OUT OUT 2V V < 2.5V, I = 120mA 180 OUT OUT I = 0.05mA 40 90 OUT Ground Current I A Q V = V - 0.1V, I = 0mA 220 500 IN OUT(nom) OUT Line Regulation V V = (V + 0.5V) to 6V, I = 0.1mA 0.001 %/V LNR IN OUT OUT Load Regulation V I = 1mA to 80mA 0.003 %/mA LDR OUT T = +25C 0.003 1 A Shutdown Supply Current I SHDN = 0V A SHDN T = +85C 0.05 A MAX8840 78 f = 1kHz, I = 10mA OUT MAX8841/MAX8842 72 MAX8840 75 Ripple Rejection PSRR f = 10kHz, I = 10mA dB OUT MAX8841/MAX8842 65 MAX8840 54 f = 100kHz, I = 10mA OUT MAX8841/ MAX8842 46 2 Maxim Integrated