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Part Number: MAX1790
Description: The MAX1790/MAX8715 boost converters incorporate high-performance (at 1.2MHz), current-mode, fixed-fre...
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MAX1790
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DataSheet
General Description
MAX1790 General Description
The MAX1790/MAX8715 boost converters incorporate high-performance (at 1.2MHz), current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in 0.21/0.15 n-channel MOSFET to provide a highly efficient regulator with fast response.
High switching frequency (640kHz or 1.2MHz selectable) allows easy filtering and faster loop performance. An external compensation pin provides the user flexibility in determining loop dynamics, allowing the use of small, low equivalent-series-resistance (ESR) ceramic output capacitors. The device can produce an output voltage as high as 12V from an input as low as 2.6V.
Soft-start is programmed with an external capacitor, which sets the input-current ramp rate. In shutdown mode, current consumption is reduced to 0.1µA. The MAX1790/ MAX8715 are available in a space-saving 8-pin µMAX® package. The ultra-small package and high switching frequency allow the total solution to be less than 1.1mm high. µMAX is a registered trademark of Maxim Integrated Products,Inc.
MAX1790 Maximum Ratings
ABSOLUTE MAXIMUM RATINGS
LX to GND .............................................................-0.3V to +14V
IN, SHDN, FREQ, FB to GND .................................-0.3V to +6.2V
SS, COMP to GND.......................................-0.3V to (VIN + 0.3V)
RMS LX Pin Current ..............................................................1.2A
Continuous Power Dissipation (TA = +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW
Operating Temperature Range
MAX1790EUA/MAX8715EUA .............................-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.
MAX1790 Features
♦ 90% Efficiency
♦ Adjustable Output from VIN to 12V
♦ 1.6A, 0.21, 14V Power MOSFET (MAX1790)
♦ 2.4A, 0.15, 14V Power MOSFET (MAX8715)
♦ +2.6V to +5.5V Input Range
♦ Pin-Selectable 640kHz or 1.2MHz Switching Frequency
♦ 0.1µA Shutdown Current
♦ Programmable Soft-Start
♦ Small 8-Pin µMAX Package
♦ Adjustable Output from VIN to 12V
♦ 1.6A, 0.21, 14V Power MOSFET (MAX1790)
♦ 2.4A, 0.15, 14V Power MOSFET (MAX8715)
♦ +2.6V to +5.5V Input Range
♦ Pin-Selectable 640kHz or 1.2MHz Switching Frequency
♦ 0.1µA Shutdown Current
♦ Programmable Soft-Start
♦ Small 8-Pin µMAX Package
MAX1790 Typical Application
LCD Displays
PCMCIA Cards
Portable Applications
Hand-Held Devices
PCMCIA Cards
Portable Applications
Hand-Held Devices
MAX1790 Connection Diagram
MAX1790
PDF/DataSheet Download
- Datasheet: MAX1790
- File Size: 337338 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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