{"id":8058,"date":"2026-06-28T08:48:27","date_gmt":"2026-06-28T08:48:27","guid":{"rendered":"https:\/\/materialparts.com\/adm7170acpz-1-8-r7\/"},"modified":"2026-06-28T11:35:07","modified_gmt":"2026-06-28T11:35:07","slug":"adm7170acpz-1-8-r7","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/adm7170acpz-1-8-r7\/","title":{"rendered":"ADM7170ACPZ-1.8-R7"},"content":{"rendered":"<h2>ADM7170ACPZ-1.8-R7 Overview<\/h2>\n<p>The ADM7170ACPZ-1.8-R7 is a 500mA ultralow noise, high PSRR LDO regulator from Analog Devices with fixed 1.8V output, 94dB PSRR at 1kHz, only 3.8uV RMS output noise, in an LFCSP-8 package, suitable for FPGA core and precision analog power supply.<\/p>\n<h3>Key Features<\/h3>\n<ul>\n<li>Fixed output voltage: 1.8V<\/li>\n<li>Output current: 500mA<\/li>\n<li>Dropout: 200mV at 500mA<\/li>\n<li>PSRR: 94dB at 1kHz<\/li>\n<li>Output noise: 3.8uV RMS<\/li>\n<li>Supply voltage: 2.3V-6.5V<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>ADM7170ACPZ-1.8-R7 Overview The ADM7170ACPZ-1.8-R7 is a 500mA ultralow noise, high PSRR LDO regulator from Analog Devices with fixed 1.8V output, 94dB PSRR at 1kHz, only 3.8uV RMS output noise, in an LFCSP-8 package, suitable for FPGA core and precision analog power supply. Key Features Fixed output voltage: 1.8V Output current: 500mA Dropout: 200mV at 500mA [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,32],"tags":[],"chip_brand":[165],"class_list":["post-8058","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-adi"],"acf":{"brief_explanation":"500mA CMOS LDO, 1.8V fixed, 5uVrms noise, 42mV dropout","date_code":"","package_case":"LFCSP-8 (3.0 x 3.0 x 0.73 mm, w\/ EP)","in_stock":4727,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/ADM7170.pdf","price":"$1.30 @ 1ku","product_introduction":"The ADM7170ACPZ-1.8-R7 is a 500 mA, ultralow noise, high PSRR CMOS LDO from Analog Devices with a fixed 1.8 V output and an input range of 2.3 V to 6.5 V. It combines low output noise of 5 uVrms (100 Hz to 100 kHz) with an ultra-fast transient response of 1.5 us for a 1 mA to 500 mA load step. The very low dropout voltage of 42 mV at 500 mA minimizes power dissipation, making it well-suited for noise-sensitive, space-constrained applications in portable and battery-powered equipment.","working_principle":"The ADM7170ACPZ-1.8-R7 employs a PMOS pass element controlled by a high-bandwidth error amplifier. The error amplifier continuously compares the output feedback voltage with an internal precision reference, adjusting the gate drive of the PMOS transistor to maintain regulation. The CMOS design eliminates the base-current penalty of bipolar LDOs, keeping ground current constant at 0.7 mA regardless of load. The fast loop response (1.5 us settling) is achieved through a proprietary compensation scheme that maintains stability with only a 4.7 uF ceramic output capacitor. The soft-start (SS) pin allows programmable output ramp time to control inrush current during startup. The enable (EN) pin provides precision threshold control for supply sequencing, and the device includes overcurrent and thermal shutdown protection.","pin_description":"<table><tr><th>Pin<\/th><th>Name<\/th><th>Description<\/th><\/tr><tr><td>1<\/td><td>VOUT<\/td><td>Regulated 1.8 V output; connect 4.7 uF ceramic capacitor to GND<\/td><\/tr><tr><td>2<\/td><td>VOUT<\/td><td>Regulated output (duplicate for current capacity)<\/td><\/tr><tr><td>3<\/td><td>SENSE<\/td><td>Output voltage sense feedback; connect to load point<\/td><\/tr><tr><td>4<\/td><td>SS<\/td><td>Soft-start control; connect capacitor to GND for ramp, or tie to VIN for default<\/td><\/tr><tr><td>5<\/td><td>EN<\/td><td>Enable input; precision threshold for sequencing (1.2 V typ.)<\/td><\/tr><tr><td>6<\/td><td>GND<\/td><td>Ground reference<\/td><\/tr><tr><td>7<\/td><td>VIN<\/td><td>Input supply (2.3 V to 6.5 V)<\/td><\/tr><tr><td>8<\/td><td>VIN<\/td><td>Input supply (duplicate)<\/td><\/tr><tr><td>EP<\/td><td>GND<\/td><td>Exposed thermal pad; solder to PCB ground plane<\/td><\/tr><\/table>","application_scenarios":"<ul><li><strong>Low-Voltage MCU\/SoC Core Supply<\/strong>: 1.8 V rail for ARM Cortex core and FPGA I\/O banks<\/li><li><strong>Precision ADC\/DAC Reference<\/strong>: Clean analog supply for 16-24 bit data converters<\/li><li><strong>Portable Medical Devices<\/strong>: Battery-powered biosensor front-ends requiring low noise<\/li><li><strong>Wireless Modules<\/strong>: Low-noise LNA and PLL supply in IoT and BLE transceivers<\/li><li><strong>Clock and Timing ICs<\/strong>: Ultra-clean supply for crystal oscillators and clock generators<\/li><\/ul>","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>Vout<\/th><th>Iout<\/th><th>Noise<\/th><th>Package<\/th><\/tr><tr><td>ADM7170ACPZ-3.3-R7<\/td><td>Analog Devices<\/td><td>3.3 V<\/td><td>500 mA<\/td><td>5 uVrms<\/td><td>LFCSP-8<\/td><\/tr><tr><td>TPS7A7001<\/td><td>Texas Instruments<\/td><td>Adj<\/td><td>1 A<\/td><td>6 uVrms<\/td><td>WSON-10<\/td><\/tr><tr><td>NCP512<\/td><td>onsemi<\/td><td>Adj<\/td><td>300 mA<\/td><td>8 uVrms<\/td><td>DFN-6<\/td><\/tr><tr><td>TLV75518PDBV<\/td><td>Texas Instruments<\/td><td>1.8 V<\/td><td>500 mA<\/td><td>32 uVrms<\/td><td>SOT-23-5<\/td><\/tr><tr><td>MAX38911<\/td><td>Maxim<\/td><td>Adj<\/td><td>500 mA<\/td><td>7 uVrms<\/td><td>WLP-6<\/td><\/tr><\/table>\n<p>ADM7170ACPZ-1.8V-R7 is a 500mA ultralow noise CMOS LDO from Analog Devices with 5\u00b5Vrms noise, 60dB PSRR at 100kHz, and 1.5\u00b5s fast transient response in 3x3mm LFCSP-8. The family includes 1.8V, 3.3V, and 5.0V fixed-output variants with identical performance. For higher current, ADM7150 provides 800mA with 1.0\u00b5Vrms noise. For adjustable output, ADM7170ACPZ offers programmable voltage. The TPS7A7001 from TI is a competitive 1A low-noise LDO alternative.<\/p>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=8058"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8058\/revisions"}],"predecessor-version":[{"id":8073,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8058\/revisions\/8073"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=8058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=8058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=8058"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=8058"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}