MAX1921EUT33+T by Analog Devices

Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23


The MAX1920/MAX1921 step-down converters deliver over 400mA to outputs as low as 1.25V. These converters use a unique proprietary current-limited control scheme that achieves over 90% efficiency. These devices maintain extremely low quiescent supply current (50µA), and their high 1.2MHz (max) operating frequency permits small, low-cost external components. This combination makes the MAX1920/MAX1921 excellent high-efficiency alternatives to linear regulators in space-constrained applications. Internal synchronous rectification greatly improves efficiency and eliminates the external Schottky diode required in conventional step-down converters. Both devices also include internal digital soft-start to limit input current upon startup and reduce input capacitor requirements. The MAX1920 provides an adjustable output voltage (1.25V to 4V). The MAX1921 provides factory-preset output voltages (see the Selector Guide). Both are available in space-saving 6-pin SOT23 packages. The MAX1920 is also available in a 6-pin TDFN package.

Where to Buy

Prices starting from US$1.93

Distributor Stock
Logo for Farnell
Farnell
from US$2.09
318
in stock
Buy Now
Logo for Analog Devices
Analog Devices
from US$2.21
494
in stock
Buy Now
Logo for element14
element14
from US$1.99
326
in stock
Buy Now
Logo for Newark Electronics
Newark Electronics
from US$1.93
318
in stock
Buy Now

Features

400mA Guaranteed Output Current
Internal Synchronous Rectifier for >90% Efficiency
Tiny 6-Pin SOT23 Package
Available in 6-Pin TDFN Package (MAX1920)
Up to 1.2MHz Switching Frequency for Small External Components
50µA Quiescent Supply Current
0.1µA Logic-Controlled Shutdown
2V to 5.5V Input Range
Fixed 1.5V, 1.8V, 2.5V, 3V, and 3.3V Output Voltages (MAX1921)
Adjustable Output Voltage (MAX1920)
±1.5% Initial Accuracy
Soft-Start Limits Startup Current

Specifications

VIN (V) (min) 2
VIN (V) (max) 5.5
VOUT1 (V) (min) 1.5
VOUT1 (V) (max) 3.3
IOUT1 (A) (max) 0.4
Switch Type Internal
Preset VOUT (V) 3
Output Adjust. Method PresetResistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1200
Package/Pins SOT23/6
BudgetaryPrice (See Notes) 1.51


MAX1921EUT33+T Semiconductors - ICs by Analog Devices

DC/DC CONV SYNC BUCK 1.2MHZ SOT-23-6

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

Specifications

Topology Synchronous Buck (Step Down)
Input Voltage Min 2.5V
Input Voltage Max 5.5V
DC / DC Converter IC Case SOT-23
No. of Pins 6Pins
Output Current 400mA
Output Voltage Nom. 3.3V
Switching Frequency 1.2MHz
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

Low-Voltage, 400mA Step-Down D | Analog Devices
DC/DC CONV, SYNC BUCK, 1.2MHZ, SOT-23-6 | element14
Dc/Dc Conv, Sync Buck, 1.2Mhz, Sot-23-6 | Newark Electronics

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX1921EUT33+T ?

Additional datasheets, footprints and schematics for MAX1921EUT33+T are listed on our Part Details page. You can also find images and similar parts to MAX1921EUT33+T on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for MAX1921EUT33+T on our Product Comparison page. Access via the 'View Pricing & Stock' button to view MAX1921EUT33+T price breaks, MOQs, lead times, inventory and SKUs from distributors.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the MAX1921EUT33+T you can contact the distributor directly for product support, shipping queries etc.

Is the MAX1921EUT33+T RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX1921EUT33+T have stock available?

Authorised distributors including Analog Devices, element14, Newark Electronics and Farnell have stock available or on a lead time for MAX1921EUT33+T .

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for MAX1921EUT33+T often in real-time on the comparison pages.

What if I can't find stock of MAX1921EUT33+T ?

You can fill out our help required form which you can use to request a quote for MAX1921EUT33+T from some of our verified obsolescence suppliers. Alternatively, contact us via our web chat in the bottom left of your screen and one of our team will try to help.

We use cookies to improve your experience. See our privacy policy.
Okay