MAX1954EUB+ by Analog Devices

Low-Cost, High-Frequency, Current-Mode PWM Buck Controllers

Status: Active
Series: MAX1954
RoHS: Unknown
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The MAX1953/MAX1954/MAX1957 is a family of versatile, economical, synchronous current-mode, pulse-width modulation (PWM) buck controllers. These step-down controllers are targeted for applications where cost and size are critical. The MAX1953 operates at a fixed 1MHz switching frequency, thus significantly reducing external component size and cost. Additionally, excellent transient response is obtained using less output capacitance. The MAX1953 operates from low 3V to 5.5V input voltage and can supply up to 10A of output current. Selectable current limit is provided to tailor to the external MOSFETs' on-resistance for optimum cost and performance. The output voltage is adjustable from 0.8V to 0.86VIN. With the MAX1954, the drain-voltage range on the high- side FET is 3V to 13.2V and is independent of the supply voltage. It operates at a fixed 300kHz switching frequency and can be used to provide up to 25A of output current with high efficiency. The output voltage is adjustable from 0.8V to 0.86VHSD. The MAX1957 features a tracking output voltage range of 0.4V to 0.86VIN and is capable of sourcing or sinking current for applications such as DDR bus termination and PowerPC®/ASIC/DSP core supplies. The MAX1957 operates from a 3V to 5.5V input voltage and at a fixed 300kHz switching frequency. The MAX1953/MAX1954/MAX1957 provide a COMP pin that can be pulled low to shut down the converter in addition to providing compensation to the error amplifier. An input undervoltage lockout (UVLO) is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFETs from overheating. Internal digital soft-start is included to reduce inrush current. The MAX1953/MAX1954/MAX1957 are available in tiny 10-pin µMAX packages.

Prices starting from US$3.45


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Features

Low-Cost Current-Mode Controllers
Fixed-Frequency PWM
MAX1953 1MHz Switching Frequency Small Component Size, Low Cost Adjustable Current Limit
1MHz Switching Frequency
Small Component Size, Low Cost
Adjustable Current Limit
MAX1954 3V to 13.2V Input Voltage 25A Output Current Capability 93% Efficiency 300kHz Switching Frequency
3V to 13.2V Input Voltage
25A Output Current Capability
93% Efficiency
300kHz Switching Frequency
MAX1957 Tracking 0.4V to 0.86VIN Output Voltage Range Sinking and Sourcing Capability of 3A
Tracking 0.4V to 0.86VIN Output Voltage Range Sinking and Sourcing Capability of 3A
Shutdown Feature
All N-Channel MOSFET Design for Low Cost
No Current-Sense Resistor Needed
Internal Digital Soft-Start
Thermal Overload Protection
Small 10-Pin µMAX Package

Specifications

VIN (V) (min) 3
VIN (V) (max) 13.2
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 4.5
IOUT1 (A) (max) 25
Switch Type External
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 300
Package/Pins UMAX/10
BudgetaryPrice (See Notes) 2.47


MAX1954EUB+ Semiconductors - ICs by Analog Devices

DC/DC CTRL SYNC BUCK 300KHZ UMAX-10

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

Specifications

Supply Voltage Min 3V
Supply Voltage Max 5.5V
No. of Outputs 1 Output, 1Outputs
Duty Cycle (%) 96%
Controller IC Case Style µMAX
No. of Pins 10Pins
Switching Frequency 300kHz
Topology Buck Synchronous Buck
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, SYNC BUCK, 300KHZ, UMAX-10 | Farnell

Frequently Asked Questions

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Is the MAX1954EUB+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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