The AD9530 is a fully integrated PLL and distribution supporting, clock cleanup, and frequency translation device for 40 Gbps/ 100 Gbps OTN applications. The internal PLL can lock to one of two reference frequencies to generate four discrete output frequencies up to 2.7 GHz.The AD9530 features an internal 5.11 GHz to 5.4 GHz, ultralow noise voltage controlled oscillator (VCO). All four outputs are individually divided down from the internal VCO using two high speed VCO dividers (the Mx dividers) and four individual 8-bit channel dividers (the Dx dividers). The high speed VCO dividers offer fixed divisions of 2, 2.5, 3, and 3.5 for wide coverage of possible output frequencies. The AD9530 is configurable for loop bandwidths <15 kHz to attenuate reference noise.The AD9530 is available in a 48-lead LFCSP and operates from a single 2.5 V typical supply voltage.The AD9530 operates over the extended industrial temperature range of ?40?C to +85?C.?Applications 40 Gbps/100 Gbps optical transport network (OTN) line side clocking Clocking of high speed analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) Data communications

The AD9549 provides synchronization for many systems, including synchronous optical networks (SONET/SDH). The AD9549 generates an output clock, synchronized to one of two external input references. The external references may contain significant time jitter, also specified as phase noise. Using a digitally controlled loop and holdover circuitry, the AD9549 continues to generate a clean (low jitter), valid output clock during a loss of reference condition, even when both references have failed.The AD9549 operates over an industrial temperature range of ?40?C to +85?C.APPLICATIONS Network synchronization Reference clock jitter cleanup SONET/SDH clocks up to OC-192, including FEC Stratum 3/3E reference clocks Wireless base stations, controllers Cable infrastructure Data communications

The AD9550 is a phase-locked loop (PLL) based clock translatordesigned to address the needs of wireline communicationand base station applications. The device employs an integer-NPLL to accommodate the applicable frequency translationrequirements. It accepts a single-ended input reference signalat the REF input.The AD9550 is pin programmable, providing a matrix ofstandard input/output frequency translations from a list of15 possible input frequencies to a list of 51 possible outputfrequency pairs (OUT1 and OUT2).The AD9550 output is compatible with LVPECL, LVDS, orsingle-ended CMOS logic levels, although the AD9550 isimplemented in a strictly CMOS process.The AD9550 operates over the extended industrial temperaturerange of ?40?C to +85?C.APPLICATIONS Cost effective replacement of high frequency VCXO, OCXO, and SAW resonators Flexible frequency translation for wireline applications such as Ethernet, T1/E1, SONET/SDH, GPON, xDSL Wireless infrastructure Test and measurement (including handheld devices)

The AD9554 is a low loop bandwidth clock translator that provides jitter cleanup and synchronization for many systems, including synchronous optical networks (SONET/SDH). The AD9554 generates an output clock synchronized to up to four external input references. The digital PLL (DPLL) allows for reduction of input time jitter or phase noise associated with the external references. The digitally controlled loop and holdover circuitry of the AD9554 continuously generates a low jitteroutput clock even when all reference inputs have failed.The AD9554 operates over an industrial temperature range of ?40?C to +85?C. If a smaller device is needed, the AD9554-1 is a version of this device with one output per PLL. If a single or dual DPLL version of this device is needed, refer to the AD9557 or AD9559, respectively.Applications Network synchronization, including synchronous Ethernet and synchronous digital hierarchy (SDH) to optical transport network (OTN) mapping/demapping Cleanup of reference clock jitter SONET/SDH clocks up to OC-192, including FEC Stratum 3 holdover, jitter cleanup, and phase transient control Cable infrastructure Data communications Professional video

The ADP2138 and ADP2139 are high efficiency, low quiescent current, synchronous step-down dc-to-dc converters. The ADP2139 has the additional feature of an internal discharge switch. The total solution requires only three tiny external components. When the MODE pin is set high, the buck regulator operates in forced PWM mode, which provides low peak-to-peak ripple for power supply noise sensitive loads at the expense of light load efficiency. When the MODE pin is set low, the buck regulator automatically switches operating modes, depending on the load current level. At higher output loads, the buck regulator operates in PWM mode. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving light load efficiency.The ADP2138/ADP2139 operate on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cell, multiple alkaline or NiMH cell, PCMCIA, USB, and other standard power sources. The maximum load current of 800 mA is achievable across the input voltage range.The ADP2138/ADP2139 are available in fixed output voltages of 3.3 V, 3.0 V, 2.8 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, 1.0 V, and 0.8 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency. The ADP2138/ADP2139 have internal soft start and they are internally compensated. During logic controlled shutdown, the input is disconnected from the output and the ADP2138/ADP2139 draw 0.2 ?A (typical) from the input source.Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup. The ADP2138/ADP2139 are available in a 6-ball wafer level chip scale package (WLCSP).Applications PDAs and palmtop computers Wireless handsets Digital audio, portable media players Digital cameras, GPS navigation units

The ADP2138 and ADP2139 are high efficiency, low quiescent current, synchronous step-down dc-to-dc converters. The ADP2139 has the additional feature of an internal discharge switch. The total solution requires only three tiny external components. When the MODE pin is set high, the buck regulator operates in forced PWM mode, which provides low peak-to-peak ripple for power supply noise sensitive loads at the expense of light load efficiency. When the MODE pin is set low, the buck regulator automatically switches operating modes, depending on the load current level. At higher output loads, the buck regulator operates in PWM mode. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving light load efficiency.The ADP2138/ADP2139 operate on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cell, multiple alkaline or NiMH cell, PCMCIA, USB, and other standard power sources. The maximum load current of 800 mA is achievable across the input voltage range.The ADP2138/ADP2139 are available in fixed output voltages of 3.3 V, 3.0 V, 2.8 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, 1.0 V, and 0.8 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency. The ADP2138/ADP2139 have internal soft start and they are internally compensated. During logic controlled shutdown, the input is disconnected from the output and the ADP2138/ADP2139 draw 0.2 ?A (typical) from the input source.Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup. The ADP2138/ADP2139 are available in a 6-ball wafer level chip scale package (WLCSP).Applications PDAs and palmtop computers Wireless handsets Digital audio, portable media players Digital cameras, GPS navigation units

The ADP2140 includes a high efficiency, low quiescent 600 mAstepdown dc-to-dc converter and a 300 mA LDO packaged in asmall 10-lead 3 mm ? 3 mm LFCSP. The total solution requiresonly four tiny external components.The buck regulator uses a proprietary high speed current-mode,constant frequency, pulse-width modulation (PWM) controlscheme for excellent stability and transient response. To ensurethe longest battery life in portable applications, the ADP2140 hasa power saving variable frequency mode to reduce switching frequencyunder light loads.The LDO is a low quiescent current, low dropout linear regulatordesigned to operate in a split supply mode with VIN2 as low as1.65 V. The low input voltage minimum allows the LDO to bepowered from the output of the buck regulator increasing efficiencyand reducing power dissipation. The ADP2140 runs frominput voltages of 2.3 V to 5.5 V allowing single Li+/Li? polymer cell, multiple alkaline/NiMH cell, PCMCIA, and other standardpower sources.ADP2140 includes a power-good pin, soft start, and internal?compensation. Numerous power sequencing options are user-selectable through two enable inputs. In autosequencing mode, the highest voltage output enables on the rising edge of EN1.?During logic controlled shutdown, the input disconnects from the output and draws less than 300 nA from the input source.?Other key features include: undervoltage lockout to prevent deep?battery discharge, soft start to prevent input current overshoot?at startup, and both short-circuit protection and thermal overload protection circuits to prevent damage in adverse conditions.When the ADP2140 is used with two 0603 capacitors, one 0402capacitor, one 0402 resistor, and one 0805 chip inductor, the totalsolution size is approximately 90 mm2 resulting in the smallest footprintsolution to meet a variety of portable applications.Applications Mobile phones Personal media players Digital camera and audio devices Portable and battery-powered equipment

The ADP2380 is a current mode control, synchronous, step-down, dc-to-dc regulator. It integrates a 44 m? high-side power MOSFET and a low-side driver to provide a high efficiency solution. The ADP2380 runs from an input voltage of 4.5 V to 20 V and can deliver 4 A of output current. The output voltage can be adjusted to 0.6 V to 90% of the input voltage. The switching frequency of the ADP2380 can be programmed from 250 kHz to 1.4 MHz or fixed at 290 kHz or 540 kHz. The synchronization function allows the switching frequency to be synchronized to an external clock to minimize system noise.External compensation and an adjustable soft start provide design flexibility. The power-good output provides simple and reliable power sequencing. Additional features include programmable undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).The ADP2380 operates over the ?40?C to +125?C junction temperature range and is available in a 16-lead TSSOP_EP package.APPLICATIONS Communication infrastructure Networking and servers Industrial and instrumentation Healthcare and medical Intermediate power rail conversion DC-to-dc point of load application

The?ADP2441/ADP2442 is a constant frequency, current mode control, synchronous, step-down dc-to-dc regulator that is capable of driving loads up to 1 A with excellent line and load regulation characteristics. The ADP2441 operates with a wide input voltage range of 4.5 V to 36 V, which makes it ideal for regulating power from a wide variety of sources. In addition, the ADP2441 has very low minimum on time (50 ns) and is, therefore, suitable for applications requiring a very high step-down ratio.The output voltage can be adjusted from 0.6 V to 0.9 V ? VIN. High efficiency is obtained with integrated low resistance N-channel MOSFETs for both high-side and low-side devices.The switching frequency is adjustable from 300 kHz to 1 MHz with an external resistor. The ADP2441 also has an accurate power-good (PGOOD) open-drain output signal.At light load conditions, the regulator operates in pulse skip mode by skipping pulses and reducing switching losses to improve energy efficiency. In addition, at medium to heavy load conditions, the regulator operates in fixed frequency pulse-width modulation (PWM) mode to reduce electromagnetic interference (EMI).The ADP2441 uses hiccup mode to protect the IC from short circuits or from overcurrent conditions on the output. The external programmable soft start limits inrush current during startup for a wide variety of load capacitances. Other key features include tracking, input undervoltage lockout (UVLO), thermal shutdown (TSD), and precision enable (EN), which can also be used as a logic level shutdown input.The ADP2441 is available in a 3 mm ? 3 mm, 12-lead LFCSP package and is rated for a junction temperature range of ?40?C to +125?C.Applications Point of load applications Distributed power systems Industrial control supplies Standard rail conversion to 24 V/12 V/5 V/3.3 V

The ADP5023 combines two high performance buck regulators and one low dropout (LDO) regulator in a small, 24-lead 4 mm ? 4 mm LFCSP to meet demanding performance and board space requirements.The high switching frequency of the buck regulators enables tiny multilayer external components and minimizes the board space. When the MODE pin is set high, the buck regulators operate in forced PWM mode. When the MODE pin is set low, the buck regulators operate in PWM mode when the load current is?above a predefined threshold. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM) improving the light-load efficiency.The two bucks operate out of phase to reduce the input capacitor requirement. The low quiescent current, low dropout voltage, and wide input voltage range of the ADP5023 LDO extends the battery life of portable devices. The ADP5023 LDO maintains power supply rejection greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage.Regulators in the ADP5023 are activated though dedicated enable pins. The default output voltages can be externally set in the adjustable version or factory programmable to a wide range of preset values in the fixed voltage version.Applications Power for processors, ASIC, FPGAs, and RF chipsets Portable instrumentation and medical devices Space constrained devices