AL17051
ULTRA-LOW STANDBY POWER HV BUCK CONVERTER
ADVANCED INFORMATION
Description
Pin Assignments
The DIODES™ AL17051 is a universal AC high voltage input step
down converter that provides accurate 3.3V or 5V output and
outstanding dynamic performance and load regulation without
requiring an optocoupler over line and load regulation. Typical
applications are power supplies for offline low power IoT (Internet of
Things) devices that support WPAN (Wireless Personal Area
Network) connectivity.
(Top View)
To support Always-On requirements of IoT connectivity, the AL17051
features ultra-low standby operation power of 10mW. It also features
high conversion efficiency 60% from rectified mains voltage to 3.3V or
5V for 50mA output and 50% at 10mA light loading during IoT system
in idle and sleep mode.
VCC
1
SOURCE
2
SOURCE
3
5
DRAIN
4
SOURCE
SOT25
With high-degree integration of the embedded 700V High-Voltage
MOS switches, the AL17051 is designed to reduce external
components and minimize e-BOM (Bill-Of-Material) with small form
factor package and PCB space.
The AL17051 has rich protection features to enhance the system
safety and reliability. It has Over Temperature Protection, VCC Under
Voltage Lock Out function, Over Current Protection, and Over Load
Protection.
Applications
Home appliance applications
IoT applications
Industrial controls
Low standby power applications
The AL17051 is available in the SOT25 package.
Features
Integrated MOSFET up to 700V
Fixed Option for Output 3.3V and 5V
No Load Operation Power Less than 10mW
High Efficiency 60% at 50mA Output
High Light-Load Efficiency 50% at 10mA Output
Universal 85 to 300VAC Input Range
Supports Low Component-Count Buck Topologies
Auto-Restart for Over Current and Over Load Faults
Excellent Load and Line Regulation
Fast Transient Response
Constant Voltage (CV) Control
Under Voltage Lock Out (UVLO) Protection for Input Voltage
Over Current Protection
Over Load Protection
Over Temperature Protection (OTP)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
For automotive applications requiring specific change
control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP
capable, and manufactured in IATF 16949 certified facilities),
please contact us or your local Diodes representative.
https://www.diodes.com/quality/product-definitions/
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain
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