QuickView - MAX1566, MAX1567 Six-Channel, High-Efficiency, Digital Camera Power Supplies

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The MAX1566/MAX1567 provide a complete powersupply solution for digital cameras. They improve performance, component count, and size compared to conventional multichannel controllers in 2-cell AA, 1-cell lithium-ion (Li+), and dual-battery designs. On-chip MOSFETs provide up to 95% efficiency for critical power supplies, while additional channels operate with external FETs for optimum design flexibility. This optimizes overall efficiency and cost, while also reducing board space.

The MAX1566/MAX1567 include six high-efficiency DC-to-DC conversion channels:

Step-up DC-to-DC converter with on-chip power FETs
Main DC-to-DC converter with on-chip FETs, configurable to step either up or down
Step-down core DC-to-DC converter with on-chip FETs
DC-to-DC controller for white LEDs or other output
Extra DC-to-DC controller (typically for LCD); two extra controllers on the MAX1566
Transformerless inverting DC-to-DC controller (typically for negative CCD bias) on the MAX1567

All DC-to-DC channels operate at one fixed frequency settable from 100kHz to 1MHz to optimize size, cost, and efficiency. Other features include soft-start, power-OK outputs, and overload protection. The MAX1566/MAX1567 are available in space-saving 40-pin thin QFN packages. An evaluation kit is available to expedite designs.

Key Features

Applications/Uses

95% Efficient Step-Up DC-to-DC Converter
0.7V Minimum Input Voltage
Main DC-to-DC Configurable as Either Step-Up or Step-Down
Combine Step-Up and Step-Down for 90% Efficient Boost-Buck
95% Efficient Step-Down for DSP Core
Regulate LED Current for Four, Six, or More LEDs
Open LED Overvoltage Protection
Transformerless Inverting Controller (MAX1567)
Three Extra PWM Controllers (Two on the MAX1567)
Up to 1MHz Operating Frequency
1µA Shutdown Mode
Soft-Start and Overload Protection
Compact 40-Pin 6mm x 6mm Thin QFN Package

	Digital Cameras
	PDAs

Key Specifications: Multifunction PMICs

Part Number

Primary Topology

Monitor/Control Features

DC-DC/Power Features

LCD/LED/Flash/CCD Features

V_IN (min) (V)

V_IN (max) (V)

Min. V_OUT (V)

Max. V_OUT (V)

I_OUT (A)

Operating Freq. (kHz)

Package

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

Price^**

MAX1566

Step-Down
Step-Up
Step-Up/Down

Low Batt./POK Output
Shutdown

Adj. Frequency
Current Limit
Fixed Freq./PWM
Internal Pwr. FETs
Soft Start
Sync. Rectifier

CCD Bias
TFT Bias
White LED

0.7

5.5

1.25

5.5

0.75

1000

TQFN/40

$2.90 @ 1k

MAX1567

Adj. Frequency
Current Limit
Internal Pwr. FETs
Soft Start
Sync. Rectifier

CCD Bias
TFT Bias

$2.90 @ 1k

See All Multifunction PMICs (79)

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.