MAX1973EUB+ by Analog Devices

Smallest 1A, 1.4MHz Step-Down Regulators


The MAX1973/MAX1974 are constant-frequency 1.4MHz pulse-width-modulated (PWM) current-mode step-down regulators. The output voltage can be set as low as 0.75V using an external voltage-divider, or it can be set to preset outputs of 1V, 1.5V (MAX1974), 1.8V, or 2.5V (MAX1973) without requiring external resistors. The MAX1973 also includes a voltage-margining feature that offsets the output voltage up or down 4% to facilitate board-level production testing. A fixed 1.4MHz operating frequency ensures operation outside the DSL frequency band, provides fast transient response, and allows the use of small external components. Only 4.7µF input and output ceramic capacitors are needed for 1A applications. Forced PWM operation ensures a constant switching frequency over all load conditions. Output voltage accuracy is ±1% over load, line, and temperature operating ranges. The MAX1973 features voltage margining; the MAX1974 provides a POK output to indicate when the output has reached 90% of its nominal regulation voltage. Both devices are available in small 10-pin µMAX® packages. Learn More About PowerMind™

Where to Buy

Prices starting from US$4.50

Distributor Stock
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Farnell
from US$6.87
No stock
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Logo for Analog Devices
Analog Devices
from US$4.60
233
in stock
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element14
from US$4.50
-
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Newark Electronics
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Features

Tiny Circuit Footprint of 0.19in²
Ultra-Low Circuit Height of 1.8mm
4.7µF Ceramic Input and Output Capacitors
2.6V to 5.5V Input Voltage
1A Output Current
1% Accurate
Built-In ±4% Logic-Controlled Voltage Margining (MAX1973)
Preset 1V, 1.5V, 1.8V, 2.5V, or 0.75V to VIN Adjustable Output
Fixed-Frequency PWM Current-Mode Operation
1.4MHz Switching Frequency, Operate Outside DSL Band
100% Duty-Cycle Dropout Capability
Small External Components

Specifications

VIN (V) (min) 2.6
VIN (V) (max) 5.5
VOUT1 (V) (min) 1.25
VOUT1 (V) (max) 5
IOUT1 (A) (max) 0.95
Switch Type Internal
Preset VOUT (V) 1.82.5
Output Adjust. Method PresetResistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1400
Package/Pins UMAX/10
BudgetaryPrice (See Notes) 3.25


MAX1973EUB+ Semiconductors - ICs by Analog Devices

DC/DC CONV SYNC BUCK 1.4MHZ UMAX-10

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

Specifications

Topology Synchronous Buck (Step Down)
Input Voltage Min 2.6V
Input Voltage Max 5.5V
No. of Outputs 1Outputs
DC / DC Converter IC Case µMAX
No. of Pins 10Pins
Output Current 1A
Output Voltage Min 1.8V
Output Voltage Max 2.5V
Switching Frequency 1.4MHz
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

Smallest 1A, 1.4MHz Step-Down | Analog Devices
DC/DC CONV, SYNC BUCK, 1.4MHZ, UMAX-10 | Farnell
Dc/Dc Conv, Sync Buck, 1.4Mhz, Umax-10 | Newark Electronics

Frequently Asked Questions

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Is the MAX1973EUB+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX1973EUB+ have stock available?

Authorised distributors including Analog Devices, element14, Farnell and Newark Electronics have stock available or on a lead time for MAX1973EUB+ .

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