The ADP1872 / ADP1873 are versatile current-mode, synchronous step-down controllers that provide superior transient response, optimal stability, and current limit protection by using a constant on-time, pseudo-fixed frequency with a programmable current-sense gain, current-control scheme. In addition, these devices offer optimum performance at low duty cycles by utilizing valley current-mode control architecture. This allows the ADP1872 /ADP1873 to drive all N-channel power stages to regulate output voltages as low as 0.6 V.The ADP1873 is the power-saving mode (PSM) version of the device and is capable of pulse skipping to maintain output regulation while achieving improved system efficiency at light loads.Available in three frequency options (300 kHz, 600 kHz, and 1.0 MHz), the ADP1872 / ADP1873 are well suited for a wide range of applications. These ICs not only operate from a 2.75 V to 5.5 V bias supply, but also can accept a power input as high as 20 V.In addition, an internally fixed soft start period is included to limit input in-rush current from the input supply during startup and to provide reverse current protection during soft start for a pre-charged output. The low-side current-sense, current-gain scheme, along with the PSM/forced pulse-width modulation (PWM) option, reduces the external part count and improves efficiency. The ADP1872 / ADP1873 operate over the –40°C to +125°C junction temperature range and are available in a 10-lead MSOP.APPLICATIONS Telecom and networking systems Mid to High End servers Set-top boxes DSP core power supplies

The ADP2118 is a low quiescent current, synchronous, step-down dc-to-dc regulator in a compact 4mm × 4mm LFCSP package. It uses a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. Under light loads, the ADP2118 can be configured to operate in pulse frequency modulation (PFM) mode that reduces switching frequency to save power. The ADP2118 runs from input voltages of 2.3 V to 5.5 V. The output voltage of the ADP2118ACPZ-R7 is adjustable from 0.6 V to input voltage (VIN), and the ADP2118ACPZ-x.x-R7 are available in preset output voltage options of 1.2 V and 3.3 V. The ADP2118 requires minimal external parts and provides a high efficiency solution with its integrated power switch, synchronous rectifier, and internal compensation. The IC draws less than 3 μA from the input source when it is disabled. Other key features include undervoltage lockout (UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).APPLICATIONS Point of load conversion Communications and networking equipments Industrial and instrumentation Consumer electronics Medical appliances

The ADP2119 / ADP2120 are low quiescent current, synchronous, step-down DC-to -DC regulators in a compact 3mm x 3mm LFCSP_WD package. Both Devices use current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. Under light load condition, they can be configured to operate in pulse frequency modulation (PFM) mode that reduces switching frequency to save power.The ADP2119 / ADP2120 can support input voltages from 2.3V to 5.5V. The output voltage can be adjusted from 0.6V to input voltage (VIN) for the adjustable version, while the fixed output version is available in preset output voltage options of 3.3V, 2.5V, 1.8V, 1.5V ,1.2V and 1.0V. The ADP2119 / ADP2120 require minimal external parts and provide a high efficiency solution with their integrated power switches, synchronous rectifier, and internal compensation. Each IC draws less than 3 μA current from the input source when it is disabled. Other key features include under voltage lockout(UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), over current protection (OCP) and thermal shutdown (TSD).APPLICATIONS Point of load conversion Communications and networking equipment Industrial and instrumentation Consumer electronics Medical appliances

The ADP2119 / ADP2120 are low quiescent current, synchronous, step-down DC-to -DC regulators in a compact 3mm x3mm LFCSP_WD package. Both Devices use current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. Under light load condition, they can be configured to operate in pulse frequency modulation (PFM) mode that reduces switching frequency to save power.The ADP2119/ADP2120 can support input voltages from 2.3V to 5.5V. The output voltage can be adjusted from 0.6V to input voltage (VIN) for the adjustable version, while the fixed output version is available in preset output voltage options of 3.3V, 2.5V, 1.8V, 1.5V ,1.2V and 1.0V. The ADP2119/ADP2120 require minimal external parts and provide a high efficiency solution with their integrated power switches, synchronous rectifier, and internal compensation. Each IC draws less than 3 μA current from the input source when it is disabled. Other key features include under voltage lockout(UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), over current protection (OCP) and thermal shutdown (TSD).APPLICATIONS Point of load conversion Communications and networking equipment Industrial and instrumentation Consumer electronics Medical appliances

The ADP2323 is a full featured, dual output, step-down dc-to-dc regulator based on current-mode architecture. The ADP2323 integrates two high-side power MOSFETs and two low-side drivers for the external N-channel MOSFETs. The two pulse-width mod-ulation (PWM) channels can be configured to deliver dual 3 A outputs or a parallel-to-single 6 A output. The regulator operates from input voltages of 4.5 V to 20 V, and the output voltage can be as low as 0.6 V.The switching frequency can be programmed between 250 kHz and 1.2 MHz, or synchronized to an external clock to minimize interference in multirail applications. The dual PWM channels run 180° out of phase, thereby reducing input current ripple as well as reducing the size of the input capacitor.The bidirectional synchronization pin can be programmed at a 60°, 90°, or 120° phase shift, providing the possibility for a stackable multiphase power solution.The ADP2323 can be set to operate in pulse-frequency modulation (PFM) mode at a light load for higher efficiency or in forced PWM for noise sensitive applications. External compensation and soft start provide design flexibility. Independent enable inputs and power good outputs provide reliable power sequencing. To enhance system reliability, the device also includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent pro-tection (OCP), and thermal shutdown (TSD).The ADP2323 operates over the −40°C to +125°C junction temperature range and is available in a 32-lead LFCSP_WQ package.APPLICATION Communication infrastructure Networking and servers Industrial and instrumentation Healthcare and medical Intermediate power rail conversion DC-to-dc point of load applications

The ADP322/ADP323 200 mA triple output LDOs combine high PSRR, low noise, low quiescent current, and low dropout voltage to extend the battery life of portable devices and are ideally suited for wireless applications with demanding performance and board space requirements.The ADP322/ADP323 PSRR is greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP322/ADP323 offer much lower noise performance than competing LDOs without the need for a noise bypass capacitor.The ADP322/ADP323 are available in a miniature 16-lead, 3 mm × 3 mm LFCSP package and are stable with tiny 1 µF ±30% ceramic output capacitors providing the smallest possible board area for a wide variety of portable power needs.The ADP322 is available in output voltage combinations ranging from 0.8 V to 3.3 V and offers overcurrent and thermal protection to prevent damage in adverse conditions. The ADP323 adjustable triple LDO can be configured for any output voltage between 0.5 V and 5 V with two resistors for each output.Applications Mobile phones Digital cameras and audio devices Portable and battery-powered equipment Portable medical devices Post dc-to-dc regulation

The ADP322/ADP323 200 mA triple output LDOs combine high PSRR, low noise, low quiescent current, and low dropout voltage to extend the battery life of portable devices and are ideally suited for wireless applications with demanding performance and board space requirements.The ADP322/ADP323 PSRR is greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP322/ADP323 offer much lower noise performance than competing LDOs without the need for a noise bypass capacitor.The ADP322/ADP323 are available in a miniature 16-lead, 3 mm × 3 mm LFCSP package and are stable with tiny 1 µF ±30% ceramic output capacitors providing the smallest possible board area for a wide variety of portable power needs.The ADP322 is available in output voltage combinations ranging from 0.8 V to 3.3 V and offers overcurrent and thermal protection to prevent damage in adverse conditions. The ADP323 adjustable triple LDO can be configured for any output voltage between 0.5 V and 5 V with two resistors for each output.Applications Mobile phones Digital cameras and audio devices Portable and battery-powered equipment Portable medical devices Post dc-to-dc regulation

The ADP322/ADP323 200 mA triple output LDOs combine high PSRR, low noise, low quiescent current, and low dropout voltage to extend the battery life of portable devices and are ideally suited for wireless applications with demanding performance and board space requirements.The ADP322/ADP323 PSRR is greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP322/ADP323 offer much lower noise performance than competing LDOs without the need for a noise bypass capacitor.The ADP322/ADP323 are available in a miniature 16-lead, 3 mm × 3 mm LFCSP package and are stable with tiny 1 µF ±30% ceramic output capacitors providing the smallest possible board area for a wide variety of portable power needs.The ADP322 is available in output voltage combinations ranging from 0.8 V to 3.3 V and offers overcurrent and thermal protection to prevent damage in adverse conditions. The ADP323 adjustable triple LDO can be configured for any output voltage between 0.5 V and 5 V with two resistors for each output.Applications Mobile phones Digital cameras and audio devices Portable and battery-powered equipment Portable medical devices Post dc-to-dc regulation

The ADR3412 / ADR3420 / ADR3425 / ADR3430 / ADR3433 / ADR3440 / ADR3450 are low-cost, low-power, high precision voltage references, featuring ± 0.1% initial accuracy, low operating current and low output noise in a small SOT23 package. For high accuracy, output voltage and temperature coefficient are trimmed digitally during final assembly using Analog Devices’ proprietary DigiTrim® technology. Stability and reliability are further improved by the devices’ low output voltage hysteresis and low long-term output voltage drift. Furthermore, the low operating current of the device (100 μA max) facilitates usage in low-power devices, while its low output noise helps maintain signal integrity in critical signal processing systems.These CMOS are available in a wide range of output voltages, all of which are specified over the industrial temperature range of −40°C to +125 °C.APPLICATIONS Precision data acquisition systems Industrial instrumentation Medical devices Battery-powered devices

The ADM1064 Super Sequencer® is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple supply systems. In addition to these functions, the ADM1064 integrates a 12-bit ADC that can be used to accurately read back up to 12 separate voltages. The device also provides up to 10 programmable inputs for moni-toring undervoltage faults, overvoltage faults, or out-of-window faults on up to 10 supplies. In addition, 10 programmable outputs can be used as logic enables. Six of these programmable outputs can provide up to a 12 V output for driving the gate of an N-FET that can be placed in the path of a supply. ApplicationsCentral office systemsServers/routersMultivoltage system line cardsDSP/FPGA supply sequencingIn-circuit testing of margined supplies