MAX1791EUB+ by Analog Devices

High-Efficiency, 10-Pin µMAX, Step-Down Controllers for Notebooks


The MAX1762/MAX1791 PWM step-down controllers provide high efficiency, excellent transient response, and high DC output accuracy needed for stepping down, high-voltage batteries to generate low-voltage CPU core, I/O, and chipset RAM supplies in notebook computers and PDAs. Maxim's proprietary Quick-PWM™ pulse-width modulator is a free-running constant on-time type with input feed-forward. Its high operating frequency (300kHz) allows small external components to be utilized in PC board area-critical applications such as subnotebook computers and smart phones. PWM operation occurs at heavy loads, and automatic switchover to pulse-skipping operation occurs at lighter loads. The external high-side p-channel and low-side n-channel MOSFETs require no bootstrap components. The MAX1762/MAX1791 are simple, easy to compensate, and do not have the noise sensitivity of conventional fixed-frequency current-mode PWMs. These devices achieve high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by their ability to drive synchronous-rectifier MOSFETs. The MAX1762/MAX1791 come in a 10-pin µMAX® package and offer two fixed voltages (Dual Mode™) for each device, 1.8V/2.5V/adj (MAX1762) and 3.3V/5.0V/adj (MAX1791).

Where to Buy

Prices starting from US$3.73

Distributor Stock
Logo for Farnell
Farnell
from US$4.33
146
in stock
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Logo for element14
element14
from US$4.85
146
in stock
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Logo for Analog Devices
Analog Devices
from US$3.73
15
in stock
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Logo for Newark Electronics
Newark Electronics
from US$3.79
-
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Features

High Operating Frequency (300kHz)
No Current-Sense Resistor
Accurate Current Limit
±1% Total DC Error over Line and During Continuous Conduction
Dual Mode Fixed Output 1.8V/2.5V/adj (MAX1762) 3.3V/5.0V/adj (MAX1791)
1.8V/2.5V/adj (MAX1762)
3.3V/5.0V/adj (MAX1791)
0.5V to 5.5V Output Adjust Range
5V to 20V Input Range
Automatic Light-Load Pulse Skipping Operation
Free-Running On-Demand PWM
Foldback Mode™ UVLO
PFET/NFET Synchronous Buck
4.65V at 25mA Linear Regulator Output
5µA Shutdown Supply Current
230µA Quiescent Supply Current
10-Pin µMAX Package

Specifications

VIN (V) (min) 5
VIN (V) (max) 20
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 2
Switch Type External
Preset VOUT (V) 5
Output Adjust. Method PresetResistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 300
Package/Pins UMAX/10
BudgetaryPrice (See Notes) 3.59


MAX1791EUB+ Semiconductors - ICs by Analog Devices

DC/DC CTRL BUCK 300KHZ UMAX-10

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

Specifications

Supply Voltage Min 5V
Supply Voltage Max 20V
No. of Outputs 1 Output, 1Outputs
Duty Cycle (%) 100%
Controller IC Case Style µMAX
No. of Pins 10Pins
Switching Frequency 300kHz
Topology Buck (Step Down)
Operating Temperature Min -40°C
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

DC/DC CTRL, BUCK, 300KHZ, UMAX-10 | element14
High-Efficiency, 10-Pin µMAX, | Analog Devices
Dc/Dc Ctrl, Buck, 300Khz, Umax-10 | Newark Electronics

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX1791EUB+ ?

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Is the MAX1791EUB+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX1791EUB+ have stock available?

Authorised distributors including element14, Farnell, Analog Devices and Newark Electronics have stock available or on a lead time for MAX1791EUB+ .

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