The ADP1874 / ADP1875?are versatile current mode, synchronous step-down controllers. They provide superior transient response, optimal stability, and current-limit protection by using a constant on-time, pseudo fixed frequency with a programmable current limit, current control scheme. In addition, these devices offer optimum performance at low duty cycles by using a valley, current mode control architecture. This allows the ADP1874 / ADP1875 to drive all N-channel power stages to regulate output voltages to as low as 0.6 V.The ADP1875 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 (see the ADP1875 Power Saving Mode (PSM) section for more information).Available in three frequency options (300 kHz, 600 kHz, and 1.0 MHz, plus the PSM option), the ADP1874 / ADP1875 are well suited for a wide range of applications that require a single-input power supply range from 2.95 V to 20 V. Low voltage biasing is supplied via a 5 V internal low dropout regulator (LDO).In addition, soft start programmability is included to limit input inrush current from the input supply during startup and to provide reverse current protection during precharged output conditions. The low-side current sense, current gain scheme, and integration of a boost diode, along with the PSM/forced pulsewidth modulation (PWM) option, reduce the external part count and improve efficiency.The ADP1874 / ADP1875 operate over the ?40?C to +125?C junction temperature range and are available in a 16-lead QSOP package.APPLICATIONS Telecom and networking systems Mid- to high-end servers Set-top boxes DSP core power supplies

The ADP1874 / ADP1875?are versatile current mode, synchronous step-down controllers. They provide superior transient response, optimal stability, and current-limit protection by using a constant on-time, pseudo fixed frequency with a programmable current limit, current control scheme. In addition, these devices offer optimum performance at low duty cycles by using a valley, current mode control architecture. This allows the ADP1874 / ADP1875 to drive all N-channel power stages to regulate output voltages to as low as 0.6 V.The ADP1875 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 (see the ADP1875 Power Saving Mode (PSM) section for more information).Available in three frequency options (300 kHz, 600 kHz, and 1.0 MHz, plus the PSM option), the ADP1874 / ADP1875 are well suited for a wide range of applications that require a single-input power supply range from 2.95 V to 20 V. Low voltage biasing is supplied via a 5 V internal low dropout regulator (LDO).In addition, soft start programmability is included to limit input inrush current from the input supply during startup and to provide reverse current protection during precharged output conditions. The low-side current sense, current gain scheme, and integration of a boost diode, along with the PSM/forced pulsewidth modulation (PWM) option, reduce the external part count and improve efficiency.The ADP1874 / ADP1875 operate over the ?40?C to +125?C junction temperature range and are available in a 16-lead QSOP package.APPLICATIONS Telecom and networking systems Mid- to high-end servers Set-top boxes DSP core power supplies

The ADP1878?/ ADP1879 are versatile current mode, synchronous step-down controllers. They provide superior transient response, optimal stability, and current-limit protection by using a constant on-time, pseudo fixed frequency with a programmable current limit, current control scheme. In addition, these devices offer optimum performance at low duty cycles by using a valley, current mode control architecture. This allows the ADP1878 / ADP1879 to drive all N-channel power stages to regulate output voltages to as low as 0.6 V.The ADP1879 is the power saving mode (PSM) version of thedevice and is capable of pulse skipping to maintain outputregulation while achieving improved system efficiency at lightloads (see the ADP1879 Power Saving Mode (PSM) section formore information).Available in three frequency options (300 kHz, 600 kHz, and1.0 MHz, plus the PSM option), the ADP1878 / ADP1879 are wellsuited for a wide range of applications that require a single-inputpower supply range from 2.95 V to 20 V. Low voltage biasing issupplied via a 5 V internal low dropout regulator (LDO).In addition, soft start, programmability is included to limitinput in-rush current from the input supply during startup andto provide reverse current protection during precharged outputconditions. The low-side current sense, current gain scheme andintegration of a boost diode, along with the PSM/forced pulsewidthmodulation (PWM) option, reduce the external part countand improve efficiency.The ADP1878/ADP1879 operate over the ?40?C to +125?Cjunction temperature range and are available in a 14-LeadLFCSP_WD package.APPLICATIONS Telecom and networking systems Mid to high-end servers Set-top boxes DSP core power supplies

The ADP190 is a high-side load switch designed for operationfrom 1.2 V to 3.6 V. This load switch provides power domainisolation for extended power battery life. The device contains alow on-resistance P-channel MOSFET that supports more than500 mA of continuous current and minimizes power loss. Thelow 2 ?A (maximum) of ground current and ultralow shutdowncurrent make the ADP190 ideal for battery-operated portableequipment. The built-in level shifter for enable logic makes theADP190 compatible with modern processors and GPIOcontrollers.Beyond operating performance, the ADP190 occupies minimalprinted circuit board (PCB) space with an area less than 0.64 mm2and a height of 0.60 mm. It is available in an ultrasmall 0.8 mm ?0.8 mm, 4-ball, 0.4 mm pitch WLCSP.ApplicationsMobile phonesDigital cameras and audio devicesPortable and battery-powered equipment

The ADP196 is a high-side load switch designed for operationfrom 1.8 V to 5.5 V. This load switch provides power domain isolation, helping to extend battery operation. The device contains a low on-resistance, N-channel MOSFET that supports more than 3 A of continuous current and minimizes power loss. In addition, RDSON is constant, independent of the VIN voltage. The low 25 ?A quiescent current and ultralow shutdown current make the ADP196 ideal for battery-powered portable equipment. The built-in level shifter for enable logic makes the ADP196 compatible with many processors and GPIO controllers.Overtemperature protection circuitry is activated if the junction temperature exceeds 125?C, thereby protecting the ADP196 anddownstream circuits from potential damage. Overcurrent pro-tection is provided in the form of constant current limiting. The ADP196-01 incorporates an internal quick output discharge circuit to discharge the output capacitance when the ADP196-01 output is disabled.The ADP196 in the WLCSP package occupies minimal printed circuit board (PCB) area with a footprint of less than 1.5 mm2 and a height of 0.60 mm.The ADP196 is available in an ultrasmall, 1.0 mm ? 1.5 mm,0.5 mm pitch, 6-ball WLCSP and a 2.0 mm ? 2.0 mm ? 0.55 mm,0.65 mm pitch, 6-lead LFCSP.APPLICATIONS Mobile phones Digital cameras and audio devices Portable and battery-powered equipment In-Rush Control of Optical Network Modules SFP, SFP+, XFP, CFP

The ADP1972 is a constant frequency, voltage mode, pulse width modulation (PWM) controller for buck or boost, dc-to-dc, asynchronous applications. The ADP1972 is designed for use in asynchronous battery testing applications with an external, high voltage field effect transistor (FET), half bridge driver, and an external control device, such as the AD8450.The asynchronous device operates as a buck converter in battery charge mode and operates as a boost converter in recycle mode to recycle energy to the input bus.The ADP1972 high voltage, VIN supply pin can withstand a maximum operating voltage of 60 V and reduces the need for additional system supply voltages. The ADP1972 has integrated features such as precision enable, pin selective buck or boost mode operation, internal and external synchronization control with programmable phase shift, programmable maximum duty cycle, and programmable peak hiccup current limit.Additional protection features include soft start to limit input inrush current during startup, input voltage undervoltage lockout (UVLO), and thermal shutdown (TSD). The ADP1972 also has a COMP pin to provide external control of the PWM operation and a FAULT pin that can be signaled to disable the DH and DL outputs if a fault condition occurs externally to the ADP1972.The ADP1972 is available in a 16-lead TSSOP package.APPLICATIONS PWM battery test systems with recycle capability including hybrid vehicles, PCs, and camera batteries Compatible with AD8450 constant voltage (CV) and constant current (CC) monitors

The ADP197 is a high-side load switch designed for operation between 1.8 V and 5.5 V. This load switch provides power domain isolation, helping extended power domain isolation. The device contains a low on-resistance, N-channel MOSFET that supports more than 3 A of continuous current and minimizes power loss. The low 18 ?A quiescent current and ultralow shutdown current make the ADP197 ideal for battery-operated portable equipment. The built-in level shifter for enable logic makes the ADP197 compatible with many processors and GPIO controllers.Overtemperature protection circuitry activates if the junction temperature exceeds 125?C, thereby protecting itself and downstream circuits from potential damage.In addition to operating performance, the ADP197 occupies minimal printed circuit board (PCB) space with an area of less than 1.5 mm2 and a height of 0.60 mm.The ADP197 is available in an ultrasmall, 1 mm ? 1.5 mm, 6-ball, 0.5 mm pitch WLCSP.

The ADP198 is a high-side load switch designed for operationbetween 1.65 V to 6.5 V that is protected against reverse currentflow from output to input. A load switch provides power domainisolation thereby helping to keep subsystems isolated andpowered independently, and enabling reduced powerconsumption. The ADP198 contains a low on-resistance PchannelMOSFET that supports over 1 Amp of continuous loadcurrent. The low 2.5?A quiescent current and ultra-lowshutdown current make the ADP198 ideal for battery-operatedportable equipment. The built-in level shifter for enable logicmakes the ADP198 compatible with modern processors andGPIO controllers. The LFCSP version also allows the user toprogram the start up time which control the inrush current atturn on.The ADP198 is available in an ultrasmall 1 mm ? 1 mm, 4-ball,0.5 mm pitch WLCSP. An 8-Lead 2 mm x 2 mm x 0.55 mm, 0.5mm pitch LFCSP is also available.APPLICATIONS Mobile phones Digital cameras and audio devices Portable and battery-powered equipment

The ADP2105 / ADP2106 / ADP2107 are low quiescent current,synchronous, step-down dc-to-dc converters in a compact 4 mm ?4 mm LFCSP package. At medium to high load currents, thesedevices use a current mode, constant frequency pulse-widthmodulation (PWM) control scheme for excellent stability andtransient response. To ensure the longest battery life in portableapplications, the ADP2105 / ADP2106 / ADP2107 use a pulsefrequency modulation (PFM) control scheme under light loadconditions that reduces switching frequency to save power.The ADP2105 / ADP2106 / ADP2107 run from input voltages of2.7 V to 5.5 V, allowing single Li+/Li? polymer cell, multiplealkaline/NiMH cells, PCMCIA, and other standard power sources.The output voltage of ADP2105 / ADP2106 / ADP2107 is adjustablefrom 0.8 V to the input voltage (indicated by ADJ), whereas theADP2105 / ADP2106 / ADP2107 are available in preset outputvoltage options of 3.3 V, 1.8 V, 1.5 V, and 1.2 V (indicated by x.x V).Each of these variations is available in three maximum currentlevels: 1 A (ADP2105), 1.5 A (ADP2106), and 2 A (ADP2107).The power switch and synchronous rectifier are integrated forminimal external part count and high efficiency. During logiccontrolled shutdown, the input is disconnected from the output,and it draws less than 0.1 ?A from the input source. Other keyfeatures include undervoltage lockout to prevent deep batterydischarge and programmable soft start to limit inrush current atstartup.Applications Mobile handsets PDAs and palmtop computers Telecommunication/networking equipment Set top boxes Audio/video consumer electronics

The ADP2108 is a high efficiency, low quiescent current step-down dc-to-dc converter manufactured in two different packages. The total solution requires only three tiny external components. It uses a proprietary, high speed current mode, constant frequency PWM control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2108 has a power save mode that reduces the switching frequency under light load conditions.The ADP2108 runs 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 600 mA is achievable across the input voltage range.The ADP2108 is available in fixed output voltages of 3.3 V, 3.0 V, 2.5 V, 2.3 V, 1.82 V, 1.8 V, 1.5 V, 1.3 V, 1.2 V, 1.1 V, and 1.0 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency. The ADP2108 has an internal soft start and is internally compensated. During logic controlled shutdown, the input is disconnected from the output and the ADP2108 draws less than 1 ?A from the input source.Other key features include undervoltage lockout to prevent deep battery discharge and soft start to prevent input current over-shoot at startup. The ADP2108 is available in 5-ball WLCSP and 5-lead TSOT packages. The ADP2109 provides the same features and operations as the ADP2108 and has the additional function of a discharge switch in the WLCSP package.APPLICATIONS PDAs and palmtop computers Wireless handsets Digital audio, portable media players Digital cameras, GPS navigation units