Datasheet > EP1551

EP1551

更新时间： 2024-02-15 15:01:52

品牌	Logo	应用领域
EOREX		/
页数	文件大小	规格书
16页	366K
描述
1 MHz Five-channel Power Supply

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EP1551 数据手册

EP1551

Preliminary

1 MHz Five-channel Power Supply

FEATURES

APPLICATIONS

‧ Up to 95% efficiency Step-up and up to 92%

‧ Digital still camera

efficient Step-down converters

‧ Digital video camera

‧ Combine Step-up and Step-down for up to 87%

efficiency buck-boost operations

‧ Minimum 0.7V input voltage

‧ 2µA shutdown mode

‧ PDA

‧ MP3

‧ PMP

‧ Portable DVD Player

‧ Car navigation

‧ Internal soft start control

‧ Overload protection

‧ Compact QFN-32 5 x 5 mm package

DESCRIPTION

The EP1551 is a small, high efficiency, five-channel, power-supply for digital still and video cameras. It consists

of:

‧ Step-up DC-DC converter with on-chip power MOSFETs for 3.3V main system supply with up to 95%

efficiency. It accepts inputs from 0.7V to 5.5V and regulates a resistor-adjustable output from 2.7V to 5.5V.

‧ Step-down main DC-DC converter with on-chip power MOSFETs for 1.5V DSP core supply with up to 92%

efficiency. It can operate from the Step-up main system supply providing buck-boost capability with up to 90%

compound efficiency, or it can run directly from battery if buck-boost operation is not needed.

‧ PWM controller with external FET for Step-up DC-DC converter for 5V motor actuator

‧ PWM controller with external FET for 15V LCD supply

‧ PWM controller with external FET and transformer for –7.5V and +15V CCD Bias

All DC-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 EP1551 is available

in apace saving QFN-32 5x 5mm packages. An evaluation kit is also available to expedite design.

Rev.01

1/16

12 3 4 5 6 7...16

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