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MAX8680

Smallest, All-Internal MOSFET, 7-Channel DSC PMIC in Tiny 5mm x 5mm Thin QFN

Industry's Smallest 7-Channel DSC Power Solution

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX8680 highly efficient complete power-supply solution is designed for digital still cameras (DSCs) and digital video cameras (DVCs). The device integrates seven on-chip power MOSFET DC-DC converters with up to 95% efficiency to power all critical power supplies in DSC systems. Each converter also features True Shutdown™, as well as internal compensation to minimize external component count. The seven DC-DC converter outputs are:

Step-up synchronous-rectified DC-DC converter (SU). The MAX8680 is bootstrapped from V_SU.
MAIN synchronous-rectified step-down DC-DC converter (M) for DSP I/O supply voltage.
DDRZ synchronous-rectified step-down DC-DC converter (Z) for DSP DDR supply voltage.
Low-voltage (down to 1V) synchronous-rectified step-down DC-DC converter (SD) for DSP core supply voltage.
High-voltage, step-up DC-DC converter with current regulation and PWM dimming control (LEDBST) for white LEDs (WLED).
High-voltage step-up DC-DC converter (CCDBST) for CCD imagers or positive LCD bias supplies.
Transformerless inverting DC-DC converter (CCDINV) for CCD imagers or negative LCD bias supplies.

The MAX8680 has an independent/simultaneous power-on sequence of the CCDBST and CCDINV converters. For a preset power-on sequence of CCDBST before CCDINV, contact the factory. The MAX8680 operates with 1-cell lithium-ion (Li+) battery, two-AA cell, or dual-battery designs and is available in a 5mm x 5mm, 40-pin thin QFN package. The MAX8680 operates over the -40°C to +85°C extended temperature range.

Data Sheet

ABRIDGED DATA SHEET

Download	Rev 2	(PDF, 156kB)
Request Full Data Sheet

An evaluation kit is available: MAX8680EVKIT

Key Features

95% Efficient Synchronous-Rectified DC-DC Converters
90% Efficient Boost-Buck Operation
85% Efficient DC-DC Converters for CCD, LCD, WLED, and/or OLED
Internal Compensation on All Channels
True Shutdown on All Step-Up Converters
Overload Protection
Soft-Start for Controlled Startup Current
Dropout Operation (100% Duty Cycle) on Step-Down Converters
Regulated Current Output for Up to 6 White LEDs
PWM Dimming of WLED Current
Adjustable LED Overvoltage Protection Up to 27V
Transformerless Inverting Converter for CCD
2MHz Switching Frequency for Low-Voltage Channels
±2.5% Switching Frequency Accuracy
1µA Shutdown Supply Current
Power-On Voltage Tracking for Core and Main Outputs
All Internal Power MOSFETs
Active-Low SDOK Power-OK Indicator

Applications/Uses

DSCs and DVCs
GPS Navigation Systems
PDAs and Portable Media Players

Key Specifications:

Multifunction PMICs

Part Number

Primary Topology

Monitor/Control Features

DC-DC/Power Features

LCD/LED/Flash/CCD Features

Interface Type

V_IN
(V)

V_OUT
(V)

Max. I_OUT
(A)

Oper. Freq.
(kHz)

Inverting Outputs

Package/Pins

Smallest Available Pckg.
(mm²)

min

max

min

max

≤

max w/pins

MAX8680

Step-Down

Step-Up

Step-Up/Down

Low Batt./POK Output

Output OVP

Shutdown

Volt. or PWM Controlled Output

Current Limit

Fixed Freq./PWM

Internal Pwr. FETs

Soft Start

Sync. Rectifier

CCD Bias

TFT Bias

White LED

GPIO

0.9

5.5

2.5

2000

TQFN/40

See All Multifunction PMICs (96)

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.

For details, contact your nearest sales office at http://www.maxim-ic.com/company/contact/sales_offices.cfm.

Diagram

Typical Operating Circuit

Reliability Reports

Reliability Report:	MAX8680.pdf
Show FIT data for:

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8680CETL+			Active	TQFN;40 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0002 (PDF) Use pkgcode/variation: T4055+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8680CETL+T			Active	TQFN;40 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0002 (PDF) Use pkgcode/variation: T4055+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8680ETL+			Active	TQFN;40 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0002 (PDF) Use pkgcode/variation: T4055+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8680ETL+T			Active	TQFN;40 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0002 (PDF) Use pkgcode/variation: T4055+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
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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Evaluation Kits

MAX8680EVKIT

Evaluation Kit for the MAX8680

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