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Part Number: MAX1730
Description: The MAX1730 regulated step-down charge pump generates up to 50mA at fixed output voltages of 1.8V or 1.9V from an in...
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MAX1730
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DataSheet
General Description
MAX1730 General Description
The MAX1730 regulated step-down charge pump generates up to 50mA at fixed output voltages of 1.8V or 1.9V from an input voltage in the 2.7V to 5.5V range. Specifically designed to provide high-efficiency logic supplies in applications that demand a compact design, the MAX1730 employs fractional conversion techniques to provide efficiency exceeding that of a linear regulator.
The MAX1730 operates at up to 2MHz, permitting the use of small 0.22F flying capacitors while maintaining low 75A quiescent supply current. Proprietary softstart circuitry prevents excessive current from being drawn from the supply during startup, making the MAX1730 compatible with higher impedance sources such as alkaline and lithium-ion cells.
The MAX1730 is available in a space-saving 10-pin MAX package that is only 1.09mm high and occupies one-half the area of an 8-pin SO.
MAX1730 Maximum Ratings
IN, OUT, SHDN, FB to GND ....................................-0.3V to +6V
C1P, C1N, C2P, C2N to GND......................-0.3V to (VIN + 0.3V)
GND to PGND....................................................................±0.3V
Output Short-Circuit Duration ....................................Indefinite
Continuous Power Dissipation (TA = +70°C)
10-Pin MAX (derate 5.6mW/°C above +70°C) ...........444mW
Junction Temperature...................................................+150°C
Operating Temperature Range ........................-40°C to +85°C
Storage Temperature Range .........................-65°C to +150°C
Lead Temperature Range (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.
MAX1730 Features
` > 85% Peak Efficiency
` 50mA Guaranteed Output Current
` Dual-Mode 1.8V or 1.9V Output
` ±3% Output Voltage Accuracy
` Up to 2MHz Operating Frequency
` Small 0.22F Capacitors
` No Inductor Required
` 2.7V to 5.5V Input Voltage Range
` Output Disconnects from Input in Shutdown Mode
` Small 10-Pin MAX Package (1.09mm max height)
` 50mA Guaranteed Output Current
` Dual-Mode 1.8V or 1.9V Output
` ±3% Output Voltage Accuracy
` Up to 2MHz Operating Frequency
` Small 0.22F Capacitors
` No Inductor Required
` 2.7V to 5.5V Input Voltage Range
` Output Disconnects from Input in Shutdown Mode
` Small 10-Pin MAX Package (1.09mm max height)
MAX1730 Typical Application
· Low-Voltage Logic Supplies
· Wireless Handsets
· PDAs
· PC Cards
· Hand-Held Instruments
· Wireless Handsets
· PDAs
· PC Cards
· Hand-Held Instruments
MAX1730 Connection Diagram
MAX1730
PDF/DataSheet Download
- Datasheet: MAX1730
- File Size: 183109 KB
- Manufacturer: Maixm
- Click here to Download
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