{"id":8052,"date":"2026-06-28T08:48:19","date_gmt":"2026-06-28T08:48:19","guid":{"rendered":"https:\/\/materialparts.com\/adm7170acpz-5-0-r7\/"},"modified":"2026-06-28T11:35:17","modified_gmt":"2026-06-28T11:35:17","slug":"adm7170acpz-5-0-r7","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/adm7170acpz-5-0-r7\/","title":{"rendered":"ADM7170ACPZ-5.0-R7"},"content":{"rendered":"<h2>ADM7170ACPZ-5.0-R7 Overview<\/h2>\n<p>The ADM7170ACPZ-5.0-R7 is a 500mA ultralow noise, high PSRR LDO regulator from Analog Devices with fixed 5.0V output, 94dB PSRR at 1kHz, only 3.8uV RMS output noise, in an LFCSP-8 package, suitable for RF and precision analog power supply.<\/p>\n<h3>\u4e3b\u8981\u529f\u80fd<\/h3>\n<ul>\n<li>Fixed output voltage: 5.0V<\/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-5.0-R7 Overview The ADM7170ACPZ-5.0-R7 is a 500mA ultralow noise, high PSRR LDO regulator from Analog Devices with fixed 5.0V output, 94dB PSRR at 1kHz, only 3.8uV RMS output noise, in an LFCSP-8 package, suitable for RF and precision analog power supply. Key Features Fixed output voltage: 5.0V Output current: 500mA Dropout: 200mV at 500mA PSRR: [&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-8052","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, 5.0V fixed, 5uVrms noise, 42mV dropout","date_code":"","package_case":"LFCSP-8 (3.0 x 3.0 x 0.73 mm, w\/ EP)","in_stock":10886,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/ADM7170.pdf","price":"$1.44 @ 1ku","product_introduction":"The ADM7170ACPZ-5.0-R7 is a 500 mA, ultralow noise CMOS LDO from Analog Devices with a fixed 5.0 V output and an input range of 2.3 V to 6.5 V. It delivers 5 uVrms output noise (100 Hz to 100 kHz), 60 dB PSRR at 100 kHz, and an ultra-fast 1.5 us transient response for load steps from 1 mA to 500 mA. The very low dropout of 42 mV at 500 mA enables efficient regulation from a 5.25 V input rail. Housed in a compact 3 mm x 3 mm LFCSP-8 with exposed pad, it requires only a 4.7 uF ceramic output capacitor.","working_principle":"The ADM7170ACPZ-5.0-R7 uses a PMOS pass transistor controlled by a high-bandwidth error amplifier. The amplifier compares the output sense voltage with an internal precision 5.0 V bandgap reference. Any deviation drives the PMOS gate to restore regulation within 1.5 us for large load transients. The CMOS architecture ensures ground current remains at 0.7 mA (no-load) independent of output current, unlike bipolar LDOs where ground current scales with load. The SENSE pin enables remote output voltage sensing at the load point. The SS pin allows programmable soft-start via an external capacitor to limit inrush current. The precision enable (EN) circuit has a 1.2 V threshold with 40 mV hysteresis, enabling deterministic power sequencing. Overcurrent protection and thermal shutdown safeguard the device under fault conditions.","pin_description":"<table><tr><th>Pin<\/th><th>Name<\/th><th>Description<\/th><\/tr><tr><td>1<\/td><td>VOUT<\/td><td>Regulated 5.0 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 for remote sensing<\/td><\/tr><tr><td>4<\/td><td>SS<\/td><td>Soft-start control; connect capacitor to GND for programmable ramp time<\/td><\/tr><tr><td>5<\/td><td>EN<\/td><td>Enable input; precision 1.2 V threshold for supply sequencing<\/td><\/tr><tr><td>6<\/td><td>GND<\/td><td>Ground reference<\/td><\/tr><tr><td>7<\/td><td>VIN<\/td><td>Input supply (5.1 V to 6.5 V recommended)<\/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>5 V Analog Rail<\/strong>: Ultra-clean supply for precision op-amps, ADC reference buffers, and sensor signal chains<\/li><li><strong>RF Front-End Power<\/strong>: Low-noise LNA, mixer, and PLL supply in wireless transceivers up to 6 GHz<\/li><li><strong>USB-Powered Devices<\/strong>: Regulating 5 V USB bus to a clean 5 V rail with minimal dropout<\/li><li><strong>Test Equipment<\/strong>: Low-noise supply for oscilloscope front-ends and spectrum analyzer LO stages<\/li><li><strong>Medical Instrumentation<\/strong>: Battery-powered diagnostic equipment requiring low-noise analog supplies<\/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>LT3042<\/td><td>Analog Devices<\/td><td>Adj<\/td><td>200 mA<\/td><td>0.8 uVrms<\/td><td>DFN-12<\/td><\/tr><tr><td>TPS7A4700<\/td><td>Texas Instruments<\/td><td>Adj<\/td><td>1 A<\/td><td>3.8 uVrms<\/td><td>VSON-10<\/td><\/tr><tr><td>ADM7150ACPZ-5.0-R7<\/td><td>Analog Devices<\/td><td>5.0 V<\/td><td>800 mA<\/td><td>1.0 uVrms<\/td><td>LFCSP-8<\/td><\/tr><tr><td>NCP511<\/td><td>onsemi<\/td><td>5.0 V<\/td><td>300 mA<\/td><td>8 uVrms<\/td><td>DFN-6<\/td><\/tr><\/table>\n<p>ADM7170ACPZ-5.0V-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\/zh\/wp-json\/wp\/v2\/posts\/8052","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=8052"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8052\/revisions"}],"predecessor-version":[{"id":8079,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8052\/revisions\/8079"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8052"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8052"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8052"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8052"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}