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

The HMC727 is a D-type Flip Flop designed to support data transmission rates of up to 13 Gbps, and clock frequencies as high as 13 GHz. During normal operation, data is transferred to the outputs on the positive edge of the clock. Reversing the clock inputs allows for negative-edge triggered applications. All input signals to the HMC727 are terminated with 50 Ohms to ground on-chip, and maybe either AC or DC coupled.The differential outputs of the HMC727 may be either AC or DC coupled. Outputs can be connected directly to a 50 Ohm to ground terminated system, while DC blocking capacitors may be used if the terminating system is 50 Ohms to a nonground DC voltage. The HMC727 operates from a single -3.3V DC supply and is available in a ceramic RoHS compliant 3x3 mm SMT package.APPLICATIONS RF ATE Applications Broadband Test & Measurement Serial Data Transmission?up to 13 Gbps Digital Logic Systems up to 13 GHz

The HMC737 is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO. The HMC737 integrate a resonator, negative resistance device, varactor diode and feature half frequency output. The VCO's phase noise performance is excellent over temperature, shock, and process due to the oscillator's monolithic structure. Power output is +9 dBm typical from a +4.2V supply voltage. The voltage controlled oscillator is packaged in a leadless QFN 4x4 mm surface mount package, and requires no external matching components.APPLICATIONS Point-to-Multi-Point Radios Test Equipment & Industrial Controls SATCOM Military End-Use

The HMC686LP4(E) is a high dynamic range passive MMIC mixer with integrated LO amplifier in a 4x4 SMT QFN package covering 0.7 to 1.1 GHz. Excellent input IP3 performance of +34 dBm for down conversion is provided for 3G & 4G GSM/CDMA applications at an LO drive of 0 dBm. With an input 1 dB compression of +25 dBm, the RF port will accept a wide range of input signal levels. Conversion loss is 7.5 dB typical. The DC to 500 MHz IF frequency response will satisfy GSM/CDMA transmit or receive frequency plans.The HMC686LP4(E) is optimized to high side LO frequency plans for 0.7 - 1.1 GHz RF Band and is pin for pin compatible with the?HMC684LP4(E)?which is a 0.7 - 1.0 GHz converter optimized for low side LO. The HMC686LP4(E) is optimized to low side LO frequency plans for 1.4 - 1.5 GHz RF LTE band applications.APPLICATIONS Cellular/3G & LTE/WiMAX/4G Basestations & Repeaters GSM, CDMA & OFDM Transmitters and Receivers

The HMC822LP6CE is a fully functioned Fractional-N Phase-Locked-Loop (PLL) Frequency Synthesizer with an Integrated Voltage Controlled Oscillator (VCO). The synthesizer consists of an integrated low noise VCO with a triband output, an autocalibration subsystem for low voltage VCO tuning, a very low noise digital Phase Detector (PD), a precision controlled charge pump, a low noise reference path divider and a fractional divider.The fractional synthesizer features an advanced delta-sigma modulator design that allows both ultra-fine step sizes and low spurious products. The phase detector (PD) features cycle slip prevention (CSP) technology to allow faster frequency hopping times. Ultra low in-close phase noise and low spurious also allows wider loop bandwidths for faster frequency hopping and low micro-phonics.For theory of operation and register map refer to the 'PLLs with Integrated VCO - RF VCOs' Operating Guide.Applications Cellular/4G Infrastructure Repeaters and Femtocells Communications Test Equipment CATV Equipment Phased Array Applications DDS Replacement? Very High Data Rate Radios

The HMC974LC3C is a silicon germanium (SiGe) monolithic, ultra fast window comparator that features reduced swing positive emitter-coupled logic (RSPECL) output drivers that are level latched. Three output ports detect whether an analog input signal is above, below, or between two reference levels supplied at the input.The outputs are single-ended negative logic. Incorporating two proven comparators at the input provides good dc and dynamic matching and reduces the input capacitance. The reduced swingoutput stages are designed to directly drive 400 mV into 50 ? terminated to a voltage (VTERM = VCCO ? 2 V).HMC974LC3C features high speed latches that can either be enabled to latch the output data or left in the track mode toimplement a tracking window comparator.Applications Automatic test equipment (ATE) High speed instrumentation Clock and data restoration Semiconductor test systems Threshold detection in electronic warfare systems