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AZ1117EH-ADJ

1A adjustable LDO, 2.5-13.2V input, 1.3V dropout, 1.25V+ Vout, SOT-223

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Manufacturer Part：

AZ1117EH-ADJ

Package：

SOT-223 (6.5 x 3.5 x 1.8 mm)

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Description

Product Overview

The AZ1117EH-ADJ is a Diodes Incorporated 1A low-dropout (LDO) linear regulator with adjustable output voltage. It offers 1.3V maximum dropout at 1A, operates from 2.5V to 13.2V input, and provides output voltage adjustable from 1.25V via external resistors. The device includes current limit and thermal shutdown protection.

Key Specifications

Input Voltage Range 2.5V to 13.2V
Output Current 1A
Output Voltage Adjustable from 1.25V
Dropout Voltage 1.3V @ 1A
Line Regulation 0.2% (typical)
Load Regulation 0.4% (typical)
Operating Temperature -40°C to +125°C

Features

  • Adjustable output voltage from 1.25V
  • 1A output current capability
  • Low dropout: 1.3V at full load
  • Internal current limiting
  • Thermal shutdown protection
  • Excellent line and load regulation
  • Stable with 10μF ceramic output capacitor
  • Pin-compatible with AMS1117

Applications

  • 3.3V to 2.5V/1.8V logic power supply
  • Battery-powered instrument regulators
  • Post-regulation after switching converters
  • Set-top box and consumer electronics
  • General-purpose 1A LDO regulation

The AZ1117EH-ADJ is a Diodes Incorporated 1A low-dropout adjustable linear regulator with input range 2.5V to 13.2V. The output voltage is set by an external resistor divider from 1.25V upward, with 1.3V maximum dropout at 1A load. It features internal current limiting, thermal shutdown, and excellent line/load regulation. Pin-compatible with AMS1117 and stable with 10μF ceramic output capacitors, it is widely used for 3.3V/2.5V/1.8V logic power, battery-powered instruments, and post-regulation applications.

The AZ1117EH-ADJ uses a PNP pass transistor in a common-emitter configuration to achieve low dropout voltage. The internal 1.25V bandgap reference is compared against the ADJ pin voltage by an error amplifier, which drives the pass transistor to maintain regulation. The output voltage is set by a resistor divider: VOUT = 1.25V x (1 + R2/R1) + IADJ x R2, where IADJ is typically 50μA. The low dropout voltage is a result of the PNP transistor’s ability to operate in saturation with only VCE(sat) across the collector-emitter junction. Internal current limiting senses the pass transistor current and reduces the base drive when the limit is reached. Thermal shutdown disables the pass transistor at approximately 155°C.

Pin Mnemonic Description
1 ADJ Adjust / feedback pin
2 VOUT Regulated output voltage
3 VIN Input supply voltage (2.5-13.2V)
4 N/C No connect (tab is VOUT)
  • 5V to 3.3V logic power supply with 1A load capability
  • 3.3V to 1.8V/1.2V FPGA core voltage post-regulation
  • Battery-powered instrument 3.3V/5V regulated supply
  • Set-top box and consumer electronics LDO regulation
  • General-purpose adjustable LDO replacing AMS1117
Model Manufacturer Key Difference
AMS1117-ADJ AMS Original 1117 adjustable, similar specs
LD1117ADJ ST 800mA, 1.1V dropout, adjustable
NCP1117ADJ onsemi 1A, 1.3V dropout, adjustable
TLV1117ADJ TI 800mA, lower IQ, adjustable
AZ1117EH-3.3 Diodes Inc Fixed 3.3V version
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Quality Assurance

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

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Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

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Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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