The MAX1771 step-up switching controller provides 90% efficiency
over a 30mA to 2A load. A unique current-limited
pulse-frequency-modulation (PFM) control scheme gives this device
the benefits of pulse-width modulation (PWM) converters (high
efficiency at heavy loads), while using less than 110µA of supply
current (vs. 2mA to 10mA for PWM converters).
This controller uses miniature external components. Its high
switching frequency (up to 300kHz) allows surface-mount magnetics
of 5mm height and 9mm diameter. It accepts input voltages from 2V
to 16.5V. The output voltage is preset at 12V, or can be adjusted
using two resistors.
The MAX1771 optimizes efficiency at low input voltages and reduces
noise by using a single 100mV current-limit threshold under all
load conditions. A family of similar devices, the MAX770–MAX773,
trades some full-load efficiency for greater current-limit
accuracy; they provide a 200mV current limit at full load, and
switch to 100mV for light loads.
The MAX1771 drives an external N-channel MOSFET switch, allowing it
to power loads up to 24W. If less power is required, use the
MAX756/MAX757 or MAX761/MAX762 step-up switching regulators with
on-board MOSFETs. An evaluation kit is available.
Features
♦ 90% Efficiency for 30mA to 2A Load Currents
♦ Up to 24W Output Power
♦ 110µA (max) Supply Current
♦ 5µA (max) Shutdown Current
♦ 2V to 16.5V Input Range
♦ Preset 12V or Adjustable Output Voltage
♦ Current-Limited PFM Control Scheme
♦ Up to 300kHz Switching Frequency
♦ Evaluation Kit Available
Trading Guides
Shipping
Delivery period
For in-stock parts, orders are estimated to ship out in 3 days. Once shipped, estimated delivery time depends on the below carriers
you chose: DHL Express, 3-7 business days. DHL eCommerce,12-22 business days. FedEx International Priority, 3-7 business days EMS, 10-15 business days. Registered Air Mail, 15-30 business days.
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based on the weight of the goods
Shipping option
We provide DHL, FedEx, EMS, SF Express, and Registered Air Mail
international shipping.
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shipped.
Returning
warranty
Returning
Returns are normally accepted when completed within 30 days from
date of shipment.Parts should be unused and in original
packaging.Customer has to take charge for the shipping.
Warranty
All Retechip purchases come with a 30-day money-back return policy,
This warranty shall not apply to any item where defects have been
caused by improper customer assembly, failure by customer to follow
instructions, product modification, negligent or improper operation
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Shenzhen Retechip® Electronic Technology Co., Ltd. was established in 2013,
specializing in electronic components distribution business.The
products are widely used in communication equipment, power supply,
medical electronics, automotive electronics, digital electronics,
industrial electronics, display modules, intelligent electronics,
new energy, the Internet of things, 5G productsand other
fields，With high-quality products, reasonable prices, rapid
distributionand timely service, we can provide customers with the
most cost-effective productsand save customers a lot of time.
