MAX8667, MAX8668 1.5MHz Dual Step-Down DC-DC Converters with Dual LDOs and Individual Enables

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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.

Key Features

Applications/Uses

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

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

Key Specifications: Switch-Mode DC-DC Power Supplies

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Number of DC-DC Outputs

Preset V_OUT (V)

Digital/VID Programmed Output

Min. Adjustable V_OUT (V)

Max. Adjustable V_OUT (V)

I_OUT (A)

Operating Current, I_CC (max) (mA)

Fixed Freq/PWM Operation

Operating Freq. (kHz)

Internal Power Switch(es)

Synchronous Rectifier

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX8667

Step-Down

2.6

5.5

1.2
1.6
1.8
2.5
2.8
2.85
3.0
3.3

1.2

0.15

Yes

1500

Yes

THIN QFN/16

$2.95 @ 1k

MAX8668

1.2
1.8
2.5
2.8
3.3

0.6

3.3

$2.95 @ 1k

See All Switch-Mode DC-DC Power Supplies (421)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.