ADM7170:  6.5 V, 500 mA, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO

Product Details

Product Status:Recommended for New Designs

The ADM7170 is a CMOS, low dropout linear regulator (LDO) that operates from 2.3 V to 6.5 V and provides up to 500 mA of output current. This high output current LDO is ideal for regulation of high performance analog and mixed signal circuits operating from 6 V down to 1.2 V rails. Using an advanced proprietary architecture, the device provides high power supply rejection and low noise, and achieves excellent line and load transient response with just a small 4.7 μF ceramic output capacitor. Load transient response is typically 1.5 μs for a 1 mA to 500 mA load step.

The ADM7170 is available in 17 fixed output voltage options. The following voltages are available from stock: 1.3 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 4.2 V, and 5.0 V. Additional voltages that are available by special order are: 1.5 V, 1.85 V, 2.0 V, 2.2 V, 2.7 V, 2.75 V, 2.8 V, 2.85 V, 3.8 V, and 4.6 V. An adjustable version is also available that allows output voltages that range from 1.2 V to VIN − VDO with an external feedback divider.

Inrush current can be controlled by adjusting the start-up time via the soft start pin. The typical start-up time with a 1 nF soft start capacitor is about 1.0 ms.

The ADM7170 regulator output noise is 5 μV rms independent of the output voltage. The ADM7170 is available in an 8-lead, 3 mm × 3 mm LFCSP, making it not only a very compact solution, but also providing excellent thermal performance for applications requiring up to 500 mA of output current in a small, low profile footprint.

APPLICATIONS

  • Regulation to noise sensitive applications: ADC and DAC circuits,
    precision amplifiers, PLLs/VCOs, and clocking ICs
  • Communications and infrastructure
  • Medical and healthcare
Industrial and instrumentation

FEATURES and BENEFITS

  • Input voltage range: 2.3 V to 6.5 V
  • Maximum load current: 500 mA
  • Low noise: 5 μV rms independent of output voltage at 100 Hz to 100 kHz
  • Fast transient response: 1.5 μs for 1 mA to 500 mA load step
  • 60 dB PSRR at 100 kHz
  • Low dropout voltage: 42 mV at 500 mA load, VOUT = 3 V
  • Initial accuracy: ±0.75%
  • Accuracy over line, load, and temperature: ±1.25%
  • Quiescent current, IGND = 0.7 mA at no load
  • Low shutdown current: 0.25 μA at VIN = 5 V
  • Stable with small 4.7 μF ceramic output capacitor
  • See data sheet for additional features

Functional Block Diagram for ADM7170

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

ADM7170 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM7170ACPZ-1.3-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $0.88 Y  Material Info Notify Me Purchase Sample
ADM7170ACPZ-1.8-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $0.88 Y  Material Info Notify Me Purchase Sample
ADM7170ACPZ-2.5-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $0.88 Y  Material Info Notify Me Purchase Sample
ADM7170ACPZ-3.0-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $0.88 Y  Material Info Notify Me Purchase Sample
ADM7170ACPZ-3.3-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $0.88 Y  Material Info Notify Me Purchase Sample
ADM7170ACPZ-4.2-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $0.88 Y  Material Info Notify Me Purchase Sample
ADM7170ACPZ-5.0-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $0.88 Y  Material Info Notify Me Purchase Sample
ADM7170ACPZ-R2 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 250 $1.06 $1.06 Y  Material Info Notify Me Purchase
ADM7170ACPZ-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $0.88 Y  Material Info Notify Me Purchase Sample
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADM7170/ADM7171/ADM7172 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM7170CP-EVALZ Status: Production Evaluation Board $49.00 Yes -
ADM7171CP-EVALZ Status: Production Evaluation Board $49.00 Yes -
ADM7172CP-EVALZ Status: Production Evaluation Board $49.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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