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MAX1709

Maxim
Part Number MAX1709
Manufacturer Maxim
Description 4A / Low-Noise / High-Frequency / Step-Up DC-DC Converter
Published May 6, 2005
Detailed Description 19-1724; Rev 0; 5/00 4A, Low-Noise, High-Frequency, Step-Up DC-DC Converter General Description The MAX1709 sets a new ...
Datasheet PDF File MAX1709 PDF File

MAX1709
MAX1709


Overview
19-1724; Rev 0; 5/00 4A, Low-Noise, High-Frequency, Step-Up DC-DC Converter General Description The MAX1709 sets a new standard of space savings for high-power, step-up DC-DC conversion.
It delivers up to 20W at a fixed (3.
3V or 5V) or adjustable (2.
5V to 5.
5V) output, using an on-chip power MOSFET from a +0.
7V to +5V supply.
Fixed-frequency PWM operation ensures that the switching noise spectrum is constrained to the 600kHz fundamental and its harmonics, allowing easy postfiltering for noise reduction.
External clock synchronization capability allows for even tighter noise spectrum control.
Quiescent power consumption is less than 1mW to extend operating time in battery-powered systems.
Two control inputs (ONA, ONB) allow simple push-on, push-off control through a single momentary pushbutton switch, as well as conventional on/off logic control.
The MAX1709 also features programmable soft-start and current limit for design flexibility and optimum performance with batteries.
The maximum RMS switch current rating is 10A.
For a device with a lower current rating, smaller size, and lower cost, refer to the MAX1708 data sheet.
o On-Chip 10A Power MOSFET o 5V, 4A Output from a 3.
3V Input o Fixed 3.
3V or 5V Output Voltage or Adjustable (2.
5V to 5.
5V) o Input Voltage Range Down to 0.
7V o Low Power Consumption 1mW Quiescent Power 1µA Current in Shutdown Mode o Low-Noise, Constant Frequency Operation (600kHz) o Synchronizable Switching Frequency (350kHz to 1000kHz) Features MAX1709 ________________________Applications Routers, Servers, Workstations, Card Racks Local 2.
5V to 3.
3V or 5V Conversion Local 3.
3V to 5V Conversion 3.
6V or 5V RF PAs in Communications Handsets PART MAX1709ESE Ordering Information TEMP.
RANGE -40°C to +85°C PIN-PACKAGE 16 Narrow SO Typical Operating Circuit INPUT 1V TO 5V 1µH OFF ON SYNC OR INTERNAL OUTPUT 3.
3V, 5V, OR ADJ UP TO 4A Pin Configuration TOP VIEW ONA 1 LX 2 LX 3 LX 4 GND 5 SS/LIM 6 REF 7 GND 8 16 ONB 15 CLK 14 3.
3/5 ONA MAX1709 CLK S...


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