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ADP2371ACPZ

High Voltage, 1.2 MHz/600 kHz, 800 mA, Low Quiescent Current Buck Regulator with Quick Output Discharge Function

Manufacturer : Analog Devices, Inc
Package/Case : LFCSP-8
Product Categories : Step-Down (Buck) Regulators ; Internal Power Switch Buck
Datasheet: ADP2371ACPZ Datasheet (PDF)
RoHs Status: Lead free / RoHS Compliant
In-stock: 185

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ADP2371ACPZ Product Details

The ADP2370/ADP2371ACPZ are high efficiency, low quiescent current, 800 mA buck (step-down) dc-to-dc converters in small 8-lead, 3 mm × 3 mm LFCSP (QFN) packages. The total solution requires only three tiny external components.

The buck regulator uses a proprietary high speed current mode, constant frequency PWM control scheme for excellent stability and transient response. The need for an external rectifier is eliminated by using a high efficiency synchronous rectifier architecture.

To ensure the longest battery life in portable applications, the ADP2370/ADP2371ACPZ employ a power saving variable frequency mode that reduces the switching frequency under light load conditions. The ADP2370/ADP2371ACPZ operate from input voltages of 3.2 V to 15 V allowing the use of multiple alkaline/NiMH, lithium cells, or other standard power sources.

The ADP2370/ADP2371ACPZ offer multiple options for setting the operational frequency. The ADP2370/ADP2371ACPZ can be synchronized to a 600 kHz to 1.2 MHz external clock or it can be forced to operate at 600 kHz or 1.2 MHz via the FSEL pin. The ADP2370/ ADP2371ACPZ can be forced to operate in PWM mode (FPWM) when noise considerations are more important than efficiency.

A power-good output is available to indicate when the output voltage is below 92% of its nominal value.

The ADP2371ACPZ is identical to the ADP2370 except that the ADP2371ACPZ includes the addition of an integrated switched resistor, quick output discharge function (QOD) that automatically discharges the output when the device is disabled.

Both devices include an internal power switch and a synchronous rectifier for minimal external part count and high efficiency. The ADP2370/ADP2371ACPZ also include internal soft start and internal compensation for ease of use.

During a logic controlled shutdown, the input is disconnected from the output and the regulator draws less than 1.2 μA from the input source. Other key features include undervoltage lockout to prevent deep battery discharge and soft start to prevent input overcurrent at startup. Short-circuit protection and thermal overload protection circuits prevent damage under adverse conditions.

The ADP2370/ADP2371ACPZ each use one 0805 capacitor, one 1206 capacitor, and one 4 mm × 4 mm inductor. The total solution size is about 53 mm2 resulting in a very small footprint solution to meet a variety of portable applications.

Feature

  • Input voltage range: 3.2 V to 15 V, output current: 800 mA
  • Quiescent current < 14 µA in power saving mode (PSM)
  • >90% efficiency
  • Force PWM pin (SYNC), 600 kHz/1.2 MHz frequency pin (FSEL)
  • Fixed outputs: 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 5 V, and adjustable option
  • 100% duty cycle capability
  • Initial accuracy: ±1%
  • Low shutdown current: <1.2 µA
  • Quick output discharge (QOD) option
  • Synchronizable to an external clock
  • 8-lead, 0.75 mm × 3 mm × 3mm LFCSP (QFN) package
  • Supported by ADIsimPower design tool

Applications

  • Portable and battery-powered equipment
  • Automatic meter readers (WSN)
  • Point of sales and transaction processing instruments
  • Medical instruments
  • Medium format display tablets and pads

ADP2371ACPZ Pinout
(Picture: Pinout)

ADP2371ACPZ Block Diagram
(Picture: Diagram)

Technical Parameters

  • Number of Outputs
  • 1
  • Vinmin | V
  • 3.2
  • Vinmax | V
  • 15
  • Output Currenttyp | A
  • 800m
  • Vout Mintyp | V
  • 800m
  • Synchronous
  • Yes
  • EMI Features
  • -

ADP2371ACPZ Datasheet

  • ADP2371 Technical Documentation/Data sheet

ADP2371ACPZ Related Products

Ratings and Reviews (1)

  • 5 / 5
  • 5 Stars 100%
  • 4 Stars 0%
  • 3 Stars 0%
  • 2 Stars 0%
  • 1 Stars 0%
  • **olfg***
    2019-08-18

    Super schnell Lieferung, danke.

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Analog Devices, Inc

ADI
Analog Devices, Inc. was founded by two MIT graduates, Ray Stata and Matthew Lorber in 1965. The same year, the company released its first product, the model 101 op amp, which was a hockey-puck sized module used in test and measurement equipment. In 1967, the company published the first issue of its...

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