Diodes PAM2321 Uživatelský manuál stáhnout pdf (Strana 1)

PAM2321

Document number: DSxxxxx Rev. 2 - 1

1 of 11

www.diodes.com

January 2013

PAM2321

Product Line o

Diodes Incorporated

3MHz, FAST TRANSIENT 2A STEP-DOWN CONVERTER

Description

The PAM2321 is a 2A step-down converter with a typical input

voltage of 3.3V and a fixed output voltage of 1.2V or an adjustable

output. The 3MHz switching frequency enables the use of small

external components. The ultra-small 3mmx3mm footprint and high

efficiency make the PAM2321 an ideal choice for portable

applications.

The PAM2321 delivers 2A maximum output current while consuming

only 55µA no-load quiescent current. Low R

DS(ON)

integrated

MOSFETs and 100% duty cycle operation make the PAM2321 the

ideal choice for high output voltage, high current applications which

require a low dropout threshold.

The PAM2321 provides excellent transient response and output

accuracy across the operating range.

The PAM2321 maintains high efficiency throughout the load range.

The PAM2321 automatically optimizes efficiency during light load

mode (PSM) and maintains constant frequency and low output ripple

during PWM mode.

Over-temperature and short circuit protection safeguard the PAM2321

and system components from damage.

The PAM2321 are available in Pb-free, ultrasmall, low profile,

TDFN3X3-10 package. The product is rated over a temperature range

of -40°C to +85°C.

Features

• 2A Maximum Output Current

• Tiny 0.47µH Chip Inductor

• Excellent Transient Response

• Input Voltage: 2.7V to 5.5V

• Fixed or Adjustable Output Voltage Options:

 Fixed Output Voltage: 1.2V

 Adjustable Output Voltage: 1.0V to V

• High Efficiency with 3MHz Switching Frequency

• 55µA No Load Quiescent Current

• 100% Duty Cycle Low-Dropout Operation

• Internal Soft-Start

• Over-Temperature and Current Limit Protection

• <1µA Shutdown Current

• -40°C to +85°C Temperature Range

• Pb-Free/Halogen Free Package

• RoHS/REACH Compliant

Pin Assignments

Applications

• Cellular Phone

• Digital Cameras

• Hard Disk Drives

• MP3 Players

• PDAs and Handheld Computers

• Portable Media Players

• USB Devices

• Wireless Network Cards

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Strany 2

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Strany 3

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Strany 4 - Electrical Characteristics

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Strany 5

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Strany 6

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Strany 7 - Application Information

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Strany 8 - LDSONLOADINOUT

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Strany 9 - Ordering Information

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Strany 10

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Strany 11 - Diodes Incorporated

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