MAX1831EEE+ by Analog Devices

3A, 1MHz, Low-Voltage, Step-Down Regulators with Synchronous Rectification and Internal Switches


The MAX1830/MAX1831 constant-off-time, pulse-width-modulated (PWM) step-down DC-DC converters are ideal for use in 5V and 3.3V to low-voltage conversion necessary in notebook and subnotebook computers. These devices feature internal synchronous rectification for high efficiency and reduced component count. They require no external Schottky diode. The internal 45mΩ PMOS power switch and 55mΩ NMOS synchronous-rectifier switch easily deliver continuous load currents up to 3A. The MAX1830 produces preset +2.5V, +1.8V, or +1.5V output voltage or an adjustable output from +1.1V to VIN. The MAX1831 produces preset +3.3V, +2.5V, and +1.5V output voltages and an adjustable output from +1.1V to VIN. They achieve efficiencies as high as 94%. The MAX1830/MAX1831 use a unique current-mode, constant-off-time, PWM control scheme, which includes Idle Mode™ to maintain high efficiency during light-load operation. The programmable constant-off-time architecture sets switching frequencies up to 1MHz, allowing the user to optimize performance trade- offs between efficiency, output switching noise, component size, and cost. Both devices are designed for continuous output currents up to 3A, an internal digital soft-start to limit surge currents during startup, a 100% duty cycle mode for low-dropout operation, and a low-power shutdown mode that disconnects the input from the output and reduces supply current below 1µA.The MAX1830/MAX1831 are available in 16-pin QSOP packages. For similar devices that provide continuous output currents of 1A to 3A, refer to the MAX1644, MAX1623, and MAX1742/MAX1842/MAX1843 data sheets.

Where to Buy

Prices starting from US$7.04

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Features

±1.5% Output Accuracy
94% Efficiency
Internal PMOS/NMOS Switches 45mΩ/55mΩ On-Resistance at VIN = +4.5V 50mΩ/55mΩ On-Resistance at VIN = +3V
45mΩ/55mΩ On-Resistance at VIN = +4.5V
50mΩ/55mΩ On-Resistance at VIN = +3V
Output Voltages +3.3V, +2.5V, or +1.5V Pin Selectable (MAX1831) +2.5V, +1.8V, or +1.5V Pin Selectable (MAX1830) +1.1V to VIN Adjustable (Both Devices)
+3.3V, +2.5V, or +1.5V Pin Selectable (MAX1831)
+2.5V, +1.8V, or +1.5V Pin Selectable (MAX1830)
+1.1V to VIN Adjustable (Both Devices)
+3V to +5.5V Input Voltage Range
750µA (max) Operating Supply Current
<1µA Shutdown Supply Current
Programmable Constant-Off-Time Operation
Up to 1MHz Switching Frequency
Idle Mode Operation at Light Loads
Thermal Shutdown
Internal Digital Soft-Start Inrush Current Limiting
100% Duty Cycle During Low-Dropout Operation
Output Short-Circuit Protection
16-Pin QSOP Package

Specifications

VIN (V) (min) 3
VIN (V) (max) 5.5
VOUT1 (V) (min) 1.1
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 3
Switch Type Internal
Preset VOUT (V) 1.52.53.3
Output Adjust. Method PresetResistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins QSOP/16
BudgetaryPrice (See Notes) 4.69


MAX1831EEE+ Semiconductors - ICs by Analog Devices

DC/DC CONV SYNC BUCK 1MHZ QSOP-16

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Topology Synchronous Buck (Step Down)
Input Voltage Min 3V
Input Voltage Max 5.5V
No. of Outputs 1Outputs
DC / DC Converter IC Case QSOP
No. of Pins 16Pins
Output Current 3A
Output Voltage Min 1.5V
Output Voltage Max 3.3V
Switching Frequency 1MHz
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

3A, 1MHz, Low-Voltage, Step-Do | Analog Devices
Dc/Dc Conv, Sync Buck, 1Mhz, Qsop-16 | Newark Electronics
DC/DC CONV, SYNC BUCK, 1MHZ, QSOP-16 | element14

Frequently Asked Questions

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Is the MAX1831EEE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Analog Devices, CoreStaff, Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX1831EEE+ .

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