Maxim > Products > Power and Battery Management > MAX8640Y, MAX8640Z

MAX8640Y, MAX8640Z

Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Converters

Smallest 2mm x 2.1mm SC70 Package, the Industry's Smallest Total Solution Size, and Most Robust 4MHz/2MHz Step-Down DC-DC Converters on the Market that Can Deliver 500mA with Over 93% Efficiency

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX8640Y/MAX8640Z step-down converters are optimized for applications where small size, high efficiency, and low output ripple are priorities. They utilize a proprietary PWM control scheme that optimizes the switching frequency for high efficiency with small external components and maintains low output ripple voltage at all loads. The MAX8640Z switches at up to 4MHz to allow a tiny 1µH inductor and 2.2µF output capacitor. The MAX8640Y switches at up to 2MHz for higher efficiency while still allowing small 2.2µH and 4.7µF components. Output current is guaranteed up to 500mA, while typical quiescent current is 28µA. Factory-preset output voltages from 0.8V to 2.5V eliminate external feedback components.

Internal synchronous rectification greatly improves efficiency and replaces the external Schottky diode required in conventional step-down converters. Internal fast soft-start eliminates inrush current so as to reduce input capacitor requirements.

The MAX8640Y/MAX8640Z are available in the tiny 6-pin, SC70 (2.0mm x 2.1mm) and µDFN (1.5mm x 1.0mm) packages. Both packages are lead-free.

Data Sheet

Download	Rev 4	(PDF, 460kB)
E-Mail

An evaluation kit is available: MAX8640EVKIT

Key Features

Tiny SC70 and µDFN Packages
500mA Guaranteed Output Current
4MHz or 2MHz PWM Switching Frequency
Tiny External Components: 1µH/2.2µF or 2.2µH/4.7µF
28µA Quiescent Current
Factory Preset Outputs from 0.8V to 2.5V
±1% Initial Accuracy
Low Output Ripple at All Loads
Ultrasonic Skip Mode Down to 1mA Loads
Ultra-Fast Line- and Load-Transient Response
Fast Soft-Start Eliminates Inrush Current

Applications/Uses

Cell Phones, PDAs, DSCs, MP3s
I/O Power
Microprocessor/DSP Core Power
Other Handhelds Where Space Is Limited

Key Specifications:

Step-Down Switching Regulators

Part Number

V_IN
(V)

V_OUT
(V)

Preset V_OUT
(V)

Max. I_OUT
(A)

Output Adjust. Method

DC-DC Outputs

Oper. Freq.
(kHz)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

min

max

≥

≤

max w/pins

See Notes

MAX8640Y

2.7

5.5

2.5

1.1

1.2

1.3

1.5

1.8

2.5

0.5

Preset

2000

µDFN/6

SC70/6

1.6

$2.00 @1k

MAX8640Z

1.1

1.8

1.1

1.2

1.3

1.5

1.8

4000

µDFN/6

SC70/6

$2.00 @1k

See All Step-Down Switching Regulators (284)

Pricing 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.

Diagram

Typical Operating Circuit

Product Guides

Communications (PDF)

Reliability Reports

Reliability Report:	MAX8640Y.pdf MAX8640Z.pdf
Show FIT data for:

Software/Models

none

Ordering Information

Filters:

Part Number:

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Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8640YELT12+			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YELT12+T			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YELT15+T			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YELT18+			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YELT18+T			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YELT25+T			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YELT82+			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YELT82+T			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT08+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT10+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8640YEXT12+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT12+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT13+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT13+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT15+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT15+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT16+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT16+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT18+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT18+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8640YEXT19+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT19+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT19-T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8640YEXT25+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640YEXT25+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640ZELT12+			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640ZELT12+T			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640ZELT18+			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640ZELT18+T			Active	µDFN;6 pin;1.6 mm² Outline Drawing:21-0147 (PDF) Land Pattern: 90-0080 (PDF) Use pkgcode/variation: L611+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640ZEXT12+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8640ZEXT12-T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8640ZEXT13+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640ZEXT15+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640ZEXT18+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640ZEXT18+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8640ZEXT18-T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8640ZEXT19+T			Active	SC70; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX8640ZEXT25+T			Active	SC70; Land Pattern: Not Available	-40°C to +85°C	See data sheet

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
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Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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