MAX1765EEE-T Maxim Integrated Products, MAX1765EEE-T Datasheet
MAX1765EEE-T
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MAX1765EEE-T Summary of contents
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... Low 125mV Dropout at 500mA o +0.7V to +5.5V Input Range o 0.1µA Logic-Controlled Shutdown o Adjustable Inductor Current Limit and Soft-Start o Thermal Shutdown o 1.5W, 16-Pin TSSOP-EP Package Available PART MAX1765EEE MAX1765EUE *Exposed pad Wireless Handsets PCS Phones Palmtop Computers TOP VIEW OUT = 3.3V OUTL = 2 ...
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Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator ABSOLUTE MAXIMUM RATINGS ONA, ONB, ONL, TRACK, OUT, INL to GND..............-0.3V, +6V PGND to GND.....................................................................±0. GND ...............................................-0.3V to (POUT + 0.3V) OUTL to GND ..............................................-0.3V to (INL + 0.3V) ...
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Low-Noise, Step-Up DC-DC Converter ELECTRICAL CHARACTERISTICS (continued OUT POUT INL ONA ONL 0.22µF open, OUTL = open (bypassed with 4.7µF +25°C.) A PARAMETER SYMBOL DC-DC ...
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Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator ELECTRICAL CHARACTERISTICS (continued OUT POUT INL ONA ONL 0.22µF open, OUTL = open (bypassed with 4.7µF =+25 ...
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Low-Noise, Step-Up DC-DC Converter ELECTRICAL CHARACTERISTICS ( OUT POUT INL ONA ONL 0.22µF open, OUTL = open (bypassed with 4.7µF), T PARAMETER SYMBOL DC-DC CONVERTER FB Regulation Voltage OUT ...
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Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator ELECTRICAL CHARACTERISTICS (continued OUT POUT INL ONA ONL 0.22µF open, OUTL = open (bypassed with 4.7µF), T PARAMETER SYMBOL CONTROL ...
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Low-Noise, Step-Up DC-DC Converter (T = +25°C, unless otherwise noted.) A EFFICIENCY vs. LOAD CURRENT (V = +3.3V) OUT 1 +2.4V IN 0.9 0 +1.2V IN 0.7 NORMAL MODE 0.6 PWM MODE 0 ...
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Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator (T = +25°C, unless otherwise noted.) A LDO PSRR vs. FREQUENCY (100Hz TO 1MHz) 0 -10 -20 -30 -40 -50 -60 -70 -80 0 100 1000 FREQUENCY (kHz) LINE ...
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Low-Noise, Step-Up DC-DC Converter (T = +25°C, unless otherwise noted.) A LIGHT-LOAD SWITCHING WAVEFORMS (V = +2.4V +3.3V 10mA) IN OUT OUT MAX1765 toc17 500ns/div A: LX NODE, 5V/div B: INDUCTOR CURRENT, ...
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Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator PIN NAME ONB 9 ON Input. When low, the DC-DC is operational (Table 2). 10 PGND Power Ground 11 LX Inductor connection to the drain of P-channel synchronous rectifier and N-channel ...
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Low-Noise, Step-Up DC-DC Converter FBL OUT IC PWR 2.15V GND ONA ONB ON ONL REF CLK/SEL V OUT 300mV OUT TRACK ISET Figure 1. Functional Diagram Table 1. Selecting the Operating Mode CLK/SEL MODE High-efficiency pulse ...
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Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator V IN 3.3µH 0.7V to 3.2V 33µF LX REF POUT ILIM INL OUT 0.22µF 0.68µF MAX1765 ONA FB ONB LOGIC INPUTS TRACK ONL OUTL FBL GND CLK/SEL PGND Figure 2. Typical ...
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Low-Noise, Step-Up DC-DC Converter tures a 250mΩ, P-channel MOSFET pass transistor. This provides several advantages, including longer bat- tery life, over similar designs using a PNP pass transis- tor. The P-channel MOSFET requires no base-drive current. This reduces quiescent ...
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... V OUT = where V , the boost-regulator feedback set point +1.25V. For output voltages above 4V, connect a Schottky diode between LX and POUT to prevent voltage transi- tion from exceeding the LX voltage rating. Dual Mode is a trademark of Maxim Integrated Products 14 ______________________________________________________________________________________ ONB ONA ONL ...
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Low-Noise, Step-Up DC-DC Converter INPUT 0.7V TO 5.5V 3.3µH LX OUT MAX1765 0.68µF TRACK TRACK ON OFF ONL FB OFF ON ONB ONA POUT INL REF OUTL ILIM GND CLK/SEL FBL PGND 0.22µF Figure 4. Dual-Output Power Supply INPUT ...
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Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator used if ISET is employed to reduce the peak inductor current (see Setting the Switch Current Limit and Soft- Start). For high efficiency, choose an inductor with a high-frequency core material ...
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Low-Noise, Step-Up DC-DC Converter REF 0.22µF R SS1 MAX1765 ISET SS2 Figure 8. Soft-Start, Reduced Current Limit Table 3. Component Selection Guide PRODUCTION Coilcraft DS3316P Surface Mount Coilcraft LPT3305 Table 4. Component Suppliers SUPPLIER COUNTRY USA ...
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Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator INL LX POUT CONTROL MAX1765 INPUTS GND OUTL µ C I/O Figure 10. Typical Phone Application Table 5. Typical Available Output Current NUMBER OF CELLS 1 NiCd/NiMH 2 NiCd/NiMH 3 NiCd/NiMH ...
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... 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 _____________________19 © 2000 Maxim Integrated Products ...