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D/C:O9+
Part Number: MAX1674
D/C: O9+
Description: The MAX1674/MAX1675/MAX1676 compact, high-efficiency, step-up DC-DC converters fit in small MAX packag...
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MAX1674
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DataSheet
General Description
MAX1674 General Description
The MAX1674/MAX1675/MAX1676 compact, high-efficiency, step-up DC-DC converters fit in small MAX packages. They feature a built-in synchronous rectifier, which improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. Quiescent supply current is only 16A.
The input voltage ranges from 0.7V to VOUT, where VOUT can be set from 2V to 5.5V. Start-up is guaranteed from 1.1V inputs. The MAX1674/MAX1675/ MAX1676 have a preset, pin-selectable output for 5V or 3.3V. The outputs can also be adjusted to other voltages using two external resistors.
All three devices have a 0.3 N-channel MOSFET power switch. The MAX1674 has a 1A current limit. The MAX1675 has a 0.5A current limit, which permits the use of a smaller inductor. The MAX1676 comes in a 10-pin MAX package and features an adjustable current limit and circuitry to reduce inductor ringing.
MAX1674 Maximum Ratings
Supply Voltage (OUT to GND) .............................-0.3V to +6.0V
Switch Voltage (LX to GND) .....................-0.3V to (VOUT + 0.3V)
Battery Voltage (BATT to GND)............................-0.3V to +6.0V
SHDN, LBO to GND .............................................-0.3V to +6.0V
LBI, REF, FB, CLSEL to GND ....................-0.3V to (VOUT + 0.3V)
Switch Current (LX) ............................................-1.5A to +1.5A
Output Current (OUT) ........................................-1.5A to +1.5A
Continuous Power Dissipation (TA = +70°C)
8-Pin MAX (derate 4.1mW/°C above +70°C) ..............330mW
10-Pin MAX (derate 5.6mW/°C above +70°C) ............444mW
Operating Temperature Range ........................-40°C to +85°C
Junction Temperature...................................................+150°C
Storage Temperature Range .........................-65°C to +165°C
Lead Temperature (soldering, 10sec) ..........................+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.
MAX1674 Features
` 94% Efficient at 200mA Output Current
` 16A Quiescent Supply Current
` Internal Synchronous Rectifier (no external diode)
` 0.1A Logic-Controlled Shutdown
` LBI/LBO Low-Battery Detector
` Selectable Current Limit for Reduced Ripple
` Low-Noise, Anti-Ringing Feature (MAX1676)
` 8-Pin and 10-Pin MAX Packages
` Preassembled Evaluation Kit (MAX1676EVKIT)
` 16A Quiescent Supply Current
` Internal Synchronous Rectifier (no external diode)
` 0.1A Logic-Controlled Shutdown
` LBI/LBO Low-Battery Detector
` Selectable Current Limit for Reduced Ripple
` Low-Noise, Anti-Ringing Feature (MAX1676)
` 8-Pin and 10-Pin MAX Packages
` Preassembled Evaluation Kit (MAX1676EVKIT)
MAX1674 Typical Application
· Pagers
· Wireless Phones
· Medical Devices
· Hand-Held Computers
· PDAs
· RF Tags
· 1 to 3-Cell Hand-Held Devices
MAX1674 Connection Diagram
MAX1674
PDF/DataSheet Download
- Datasheet: MAX1674
- File Size: 170824 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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