MAX8668

PRODUCTION

1.5MHz Dual Step-Down DC-DC Converters with Dual LDOs and Individual Enables

Save Power and Board Space Using the Industry's First Dual Step-Down DC-DC Converters with Dual Low-Input LDOs

Data Sheet (Rev. 1) Product Selection Table

Part Models: 8
1ku List Price: Starting From $4.23

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Overview

Tiny, Thin QFN 3mm x 3mm Package
Individual Enables
Step-Down Converters
- 600mA Guaranteed Output Current on OUT1
- 1200mA Guaranteed Output Current on OUT2
- Tiny Size 2.2µH Chip Inductor (0805)
- Output Voltage from 0.6V to 3.3V (MAX8668)
- Ultra-Fast Line and Load Transients
- Low 25µA Supply Current Each
LDOs
- 300mA Guaranteed
- Low 1.7V Minimum Supply Voltage
- Low Output Noise

The MAX8667/MAX8668 dual step-down converters with dual low-dropout (LDO) linear regulators are intended to power low-voltage microprocessors or DSPs in portable devices. They feature high efficiency with small external component size. The step-down converters are adjustable from 0.6V to 3.3V (MAX8668) or factory preset (MAX8667) with guaranteed output current of 600mA for OUT1 and 1200mA for OUT2. The 1.5MHz hysteretic-PWM control scheme allows for tiny external components and reduces no-load operating current to 100µA with all outputs enabled. Dual low-quiescent-current, low-noise LDOs operate down to 1.7V supply voltage. The MAX8667/MAX8668 have individual enables for each output, maximizing flexibility.

The MAX8667/MAX8668 are available in the space-saving, 3mm x 3mm, 16-pin thin QFN package.

Applications

Cell Phones/Smartphones
Digital Cameras, Camcorders
Handheld Instruments
PCMCIA Cards
PDA and Palmtop Computers
Portable MP3 and DVD Players

Part Models: 8
1ku List Price: Starting From $4.23

Documentation

Data Sheet 1

MAX8667-MAX8668: 1.5MHz Dual Step-Down DC-DC Converters with Dual LDOs and Individual Enables Data Sheet (Rev.1) 08/16/2007

Reliability Data 1

MAX8668 Reliability Data 01/12/2023

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX8668ETEP+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX8668ETEP+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX8668ETEQ+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX8668ETEQ+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX8668ETEU+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX8668ETEU+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX8668ETEV+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX8668ETEV+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 2, 2025 - 2505 PIN/ERRATA
		pcn_2505
MAX8668ETEP+	PRODUCTION
MAX8668ETEQ+	PRODUCTION
MAX8668ETEU+	PRODUCTION
MAX8668ETEV+	PRODUCTION
Mar 9, 2023 - 2276A WAFER FAB
		pcn_2276a
MAX8668ETEP+	PRODUCTION
MAX8668ETEP+T	PRODUCTION
MAX8668ETEQ+	PRODUCTION
MAX8668ETEQ+T	PRODUCTION
MAX8668ETEU+	PRODUCTION
MAX8668ETEU+T	PRODUCTION
MAX8668ETEV+	PRODUCTION
MAX8668ETEV+T	PRODUCTION
Sep 18, 2020 - 2054 ASSEMBLY
		pcn_2054
MAX8668ETEP+	PRODUCTION
MAX8668ETEP+T	PRODUCTION
Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
MAX8668ETEP+	PRODUCTION
MAX8668ETEQ+	PRODUCTION
MAX8668ETEQ+T	PRODUCTION
MAX8668ETEU+	PRODUCTION
MAX8668ETEV+	PRODUCTION
MAX8668ETEV+T	PRODUCTION
Aug 2, 2018 - 1682A ASSEMBLY
		pcn_1682a
MAX8668ETEQ+	PRODUCTION
MAX8668ETEQ+T	PRODUCTION
Apr 9, 2018 - 1682 ASSEMBLY
		pcn_1682
MAX8668ETEU+	PRODUCTION
MAX8668ETEV+	PRODUCTION
MAX8668ETEV+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

MAX8668 Evaluation Kit

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Features and Benefits

Tiny, Thin QFN, 3mm x 3mm IC Package
Individual Enables
Dual Step-Down Converters
- 600mA Guaranteed Current on OUT1
- 1200mA Guaranteed Current on OUT2
- Output Voltage from 0.6V to 3.3V
- Ultra-Fast Line and Load Transients
- Low 25µA Supply Current Each
Dual 300mA LDOs
Fully Assembled and Tested

Product Details

The MAX8668 evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) for evaluating the MAX8668 dual step-down DC-DC converter with dual LDOs. The MAX8668 EV kit operates from a 2.6V to 5.5V supply and provides a 600mA step-down output, a 1200mA step-down output, and two 300mA LDO outputs. The EV kit comes with the MAX8668ETEA+ installed, providing two adjustable step-down outputs and two 2.8V preset LDO outputs. The adjustable output voltages for the two step-down converters are set to 1.2V (OUT1) and 1.8V (OUT2), and can be adjusted from 0.6V to 3.3V by changing resistors on the board. The MAX8668 EV kit can also be used to evaluate any version of the MAX8667 (preset step-down/preset LDO) or MAX8668 (adjustable step-down/preset LDO). Refer to the Selector Guide in the MAX8667/MAX8668 IC data sheet for a list of available preset output voltages.