The ADP1715 / ADP1716?are low dropout, CMOS linear regulators that operate from 2.5 V to 5.5 V and provide up to 500 mA of output current. Using an advanced proprietary architecture, they provide high power supply rejection and achieve excellent line and load transient response with just a small 2.2 ?F ceramic output capacitor.Three versions of this part are available, one with fixed output voltage options and variable soft start (ADP1715), one with adjustable output voltage and fixed soft start (ADP1715 Adjustable), and one with voltage tracking in fixed output voltage options (ADP1716). The fixed output voltage options are internally set to one of sixteen values between 0.75 V and 3.3 V; the adjustable output voltage can be set to any value between 0.8 V and 5.0 V by an external voltage divider connected from OUT to ADJ. The variable soft start uses an external capacitor at SS to control the output voltage ramp. Tracking limits the output voltage to the at-or-below voltage at the TRK pin.The ADP1715 / ADP1716 are available in 8-lead thermally enhanced MSOP packages, making them not only a very compact solution but also providing excellent thermal performance for applications requiring up to 500 mA of output current in a small, low profile footprint.APPLICATIONS Notebook computers Memory components Telecommunications equipment Network Equipment DSP/FPGA/?P supplies Instrumentation equipment/data acquisition systems

The?ADP170/ADP171/ADP172 are low voltage input, low quiescentcurrent, low-dropout (LDO) linear regulators that operate from1.6 V to 3.6 V and provide up to 300 mA of output current. The low 50 mVdropout voltage at 300 mA load improves efficiency and allows operation over a wide input voltage range. The low 23 ?A of quiescent current at no load makes the ADP172 ideal for battery-operated portable equipment.The ADP172 is capable of 31 fixed-output voltage options, ranging from 0.8 V to 3.0 V. The ADP172 is optimized for stable operationwith small 1 ?F ceramic output capacitors. Ideal for powering digital processors, the ADP172 exhibits good transient perform-ance and occupies minimal board space. Compared with commodity-type LDOs, the ADP172 provides 20 dB to 40 dBbetter power supply rejection ratio (PSRR) at 100 kHz, making the ADP172 an ideal power source for analog-to-digital converter (ADC) mixed-signal processor systems and allowing use of smaller size bypass capacitors. In addition, low output noiseperformance without the need for an additional bypass capacitorfurther reduces printed circuit board (PCB) component count.Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP172 is availablein a tiny 4-ball, 0.5 mm pitch WLCSP for the smallest footprintsolution to meet a variety of portable power applications.APPLICATIONS Mobile phones Digital camera and audio devices Portable and battery-powered equipment DSP/FPGA/microprocessor supplies Post dc-to-dc regulation

The ADP1752 /?ADP1753 are CMOS, low dropout linear regulators that operate from 1.6 V to 3.6 V and provide up to 800mA of output current. These low VIN / VOUT LDOs are ideal for regulation of nanometer FPGA geometries operating from 2.5V down to 1.8V I/O rails, and powering core voltages down to 0.75V. Using an advanced proprietary architecture, they provide high power supply rejection, low noise, and achieve excellent line and load transient response with a small 4.7 ?F ceramic output capacitor.The ADP1752 is available in 7 fixed output voltage options. The ADP1753 is available in an adjustable version, which allows output voltages that range from 0.75 V to 3.0 V via an external divider. The ADP1752 / ADP1753 allows an external soft start capacitor to be connected to program the start-up. A power good output allows power system monitors to digitally check the health of the output power rail voltage.The ADP1752 / ADP1753 are available in a 16-lead, 4 mm ? 4 mm LFCSP, making them not only very compact solutions, but also providing excellent thermal performance for applications requiring up to 800mA of output current in a small, low profile footprint.APPLICATIONS Server computers Memory components Telecommunications equipment Network equipment DSP/FPGA/microprocessor supplies Instrumentation equipment/data acquisition systems

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 ADP2164 is a 4 A, synchronous, step-down dc-to-dc regulator in a compact 4 mm ? 4 mm LFCSP package. The regulator uses a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response.The input voltage range of the ADP2164 is 2.7 V to 6.5 V. The output voltage of the ADP2164 is adjustable from 0.6 V to the input voltage (VIN). The ADP2164 is also available in six preset output voltage options: 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V.The ADP2164 integrates a pair of low on-resistance P-channel and N-channel internal MOSFETs to maximize efficiency and minimize external component count. The 100% duty cycle operation allows low dropout voltage at 4 A output current.The high, 1.2 MHz PWM switching frequency allows the use of small external components, and the SYNC input enables multiple ICs to synchronize out of phase to reduce ripple and eliminate beat frequencies.Other key features of the ADP2164 include undervoltage lockout (UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.Applications Point-of-load conversion Communications and networking equipment Industrial and instrumentation Consumer electronics

The ADP2311 is a fully integrated, dual output, synchronous step-down dc-to-dc regulator. The regulator operates from input voltages of 4.5 V to 18 V, and the output can regulate down to 0.6 V. Each channel can provide up to 1 A of continuous output current.The ADP2311 integrates the high-side and low-side MOSFETs to provide a very high efficiency, compact solution. Both channels of the regulator run at 180? out of phase to reduce the input ripple current and the input capacitor size, thereby helping to lower system electromagnetic interference (EMI). The ADP2311 also integrates internal compensation and soft start circuitry to simplify the design.An on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. Accurate voltage monitoring circuitry and a power fail comparator provide a controlled power-up and power-down sequence to enhance system reliability.The ADP2311 also includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).The ADP2311 operates over the ?40?C to +125?C junction temperature range and is available in a 24-lead LFCSP package.Applications Industrial and instrumentation Healthcare and medical DC-to-DC point of load applications

The ADP2503?/ ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages greater than, less than, or equal to the regulated output voltage. The power switches and synchronous rectifiers are internal to minimize external device count. At high load currents, the ADP2503 / ADP2504 use a current-mode, fixed frequency pulse-width modulation (PWM) control scheme for optimal stability and transient response. To ensure the longest battery life in portable applications, the ADP2503 / ADP2504 have an optional power save mode that reduces the switching frequency under light load conditions. For wireless and other low noise applications where variable frequency power save mode may cause interference, the logic control input sync forces fixed frequency PWM operation under all load conditions.?The ADP2503 / ADP2504 can run from input voltages between 2.3 V and 5.5 V, allowing single lithium or lithium polymer cell, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources. The ADP2503 / ADP2504 have fixed output options, or using the adjustable model, the output voltage can be programmed through an external resistor divider. Compensation is internal to minimize the number of external components.During logic-controlled shutdown, the input is disconnected from the output and draws less than 1 ?A from the input source. Operating as boost converters, the ADP2503 / ADP2504 feature a true load disconnect function that isolates the load from the power source. Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup.APPLICATIONSWireless handsetsDigital cameras/portable audio playersMiniature hard disk power suppliesUSB powered devices?

The ADP5003 integrates a high voltage buck regulator and an ultralow noise low dropout (LDO) regulator in a small, 5 mm ? 5 mm, 32-lead LFCSP package to provide highly efficient and quiet regulated suppliesThe buck regulator is optimized to operate at high output currents up to 3 A. The LDO is capable of a maximum output current of 3 A and operates efficiently with low headroom voltage while maintaining high power supply rejection.The ADP5003 can operate in one of two modes. Adaptive mode allows the LDO to operate with an optimized headroom by adjusting the buck output voltage internally in response to the LDO load current. Alternatively, the ADP5003 can operate in independent mode, where both regulators operate separately from each other, and where the output voltages are programmed using resistor dividers.The LDO regulator output can be accurately controlled at the point of load (POL) using remote sensing that compensates for the printed circuit board (PCB) trace impedance while delivering high output currents.Each regulator is activated via a dedicated precision enable input. The buck switching frequency can be synchronized to an external signal, or programmed with an external resistor.Safety features in the ADP5003 include thermal shutdown (TSD), input undervoltage lockout (UVLO) and independent current limits for each regulator. The ADP5003 is rated for a ?40?C to +125?C operating junction temperature range.APPLICATIONS Low noise power for high speed analog-to-digital converter (ADC) and digital-to-analog converter (DAC) designs Powering RF transceivers and clocking ICs

The ADP5014 combines four high performance, low noise buck regulators in a 40-lead LFCSP package. Relying on its low output noise (~25 ?V rms when VOUT ? VREF), the low noise buck regulator enables the powering up of the noise sensitive signal chain products.All channels in the ADP5014 integrate high-side and low-side power metal-oxide semiconductor field effect transistors (MOSFET). Channel 1 and Channel 2 deliver a programmable output current of 2 A or 4 A. Combining Channel 1 and Channel 2 in a parallel configuration provides a single output with up to 8 A of current.Channel 3 and Channel 4 deliver a programmable output current of 1 A or 2 A. Combining Channel 3 and Channel 4 in a parallel configuration can provide a single output with up to 4 A of current.The ADP5014 features two enable modes. The manual mode has four individual precision enable pins to enable each regulator manually. Alternatively, the sequence mode has one grouped precision enable signal with programmable power-up and power-down delay timers on each rail for specific rail sequence requirements.The switching frequency of the ADP5014 can be programmed or synchronized to an external clock from 500 kHz to 2.5 MHz.The ADP5014 offers other key features like selective forced pulse width modulation (FPWM)/power saving mode (PSM), an undervoltage output (UVO), active output discharge, and a power-good flag. Other safety features include input undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP) and thermal shutdown (TSD).Applications RF transceiver, high speed analog-to-digital converter (ADC)/digital-to-analog converter (DAC), mixed signal ASIC FPGA and processor applications Security and surveillance Medical applications

The ADP5024 combines two high performance buck regulators and one low dropout (LDO) regulators 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 pre-defined 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 LDO extends the battery life of portable devices. The ADP5024 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 ADP5024 are activated though dedicated enable pins. The default output voltages can be either 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, ASICS, FPGAs, and RF chipsets Portable instrumentation and medical devices Space constrained devices