Switch DC/DC convert circuit

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SSP8613

The SSP8613 is the industry’s first 5-lead SOT-23 current mode DC/DC converter. Intended for small, low power applications, it operates from an input voltage as lowas 1.2V and switches at 2.0MHz, allowing the use oftiny, low cost capacitors and inductors 2mm or less in height. Its small size and high switching frequency enables the complete DC/DC converter function to take up less than 0.2 square inches of PC board area. Multiple output power supplies can now use a separate regulator for each output voltage, replacing cumbersome quasi-regulated ap-proaches using a single regulator and a custom trans-former.A constant frequency, internally compensated current mode PWM architecture results in low, predictable output noise that is easy to filter. The high voltage switch on the SSP8613 is rated at 36V, making the device ideal for boost converters up to 34V as well as for Single-Ended Primary Inductance Converter (SEPIC) and flyback designs. The device can generate 5V at up to 200mA from a 3.3V supply or 5V at 175mA from four alkaline cells in a SEPIC design. The SSP8613 is available in the 5-leadSOT-23 package.

SSP8711

The SSP8711 is a constant frequency, 6-pin SOT23 current mode step-up converter intended for small, low power applications. The SSP8711 switches at 1.2MHz and allows the use of tiny, low cost capacitors and inductors. Internal soft-start results in small inrush current and extends battery life. The SSP8711 features automatic shifting to pulse frequency modulation mode at light loads. The SSP8711 includes under-voltage lockout, current limiting, and thermal overload protection to prevent damage in the event of an output overload.

SSP8099

The SSP8099 is a synchronous step-up converter . It is designed for products powered by alkaline battery, NiMH rechargeable battery, Li-Mn battery or rechargeable Li-Ion battery, for which high efficiency under light load condition is critical to achieve long battery life operation. The SSP8099 can support up to 300mA output current from 3.3V to 5V conversion, and achieve up to 90% efficiency at 200mA load. The SSP8099 also offers both down mode and pass-through operation for different applications. In down mode, the output voltage can still be regulated at target value even when input voltage is higher than output voltage. In pass-through mode, the output voltage follows input voltage. The SSP8099 exits down mode and enters into pass-through mode when VIN > VOUT + 0.3V. The SSP8099 supports true shutdown function when it is disabled, which disconnects the load from the input supply to reduce the current consumption. The SSP8099 offers both adjustable output voltage version and fixed output voltage versions. It is available in Green WLCSP-1.22×0.83-6B and TDFN-2×2-6AL packages.

SSP9810

The SSP9810 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 1.2A continuous output current over a wide input supply range, with excellent load and line regulation.The SSP9810 requires a minimal number of readily available, external components and is available in a space saving SOT23-6 package.

SSP9481

The SSP9481 is a monolithic, step-down, switch-mode converter with a built-in power MOSFET. Current-mode operation provides a fast transient response and eases loop stabilization. The wide input Voltage range (4.5V to 80V) provides high efficiency output of 1A current. Low shutdown mode quiescent current of 0.1μA is suitable for battery-powered applications. Fail-state protection includes cycle-by-cycle current-limiting protection and thermal shutdown protection.

SSP9480

The SSP9480 is a monolithic, step-down, switch-mode converter with a built-in power MOSFET. Current-mode operation provides a fast transient response and eases loop stabilization. The wide input Voltage range (4.5V to 80V) provides high efficiency output of 1.2A current. Low shutdown mode quiescent current of 0.1μA is suitable for battery-powered applications. Fail-state protection includes cycle-by-cycle current-limiting protection and thermal shutdown protection.

SSP9461

The SSP9461 is a monolithic, step-down, switch-mode converter with a built-in power MOSFET. Current-mode operation provides a fast transient response and eases loop stabilization. The wide input range(4.5V to 60V) provides high efficiency output of 1.2A current. Low shutdown mode quiescent current of 0.1μA is suitable for battery-powered applications. Fault state protection includes Cycle by Cycle OCP and thermal shutdown protection.

SSP9459

The SSP9459 is a monolithic, step-down, switch-mode converter with a built-in power MOSFET. It achieves a 0.5A peak-output current over a wide input supply range with excellent load and line regulation. Current-mode operation provides a fast transient response and eases loop stabilization. The wide input range(4.5V to 60V) provides high efficiency output of 0.5A current, Low shutdown mode quiescent current of 0.1μA is suitable for battery-powered applications. Fault condition protections include cycle-by-cycle current limiting and thermal shutdown.

SSP9451

The SSP9451 is a high frequency (1.8MHz) step-down switching regulator with integrated internal high-side high voltage power MOSFET. It provides single 0.6A(or less) highly efficient output with current mode control for fast loop response. The wide input range(4.2V to 40V) accommodates a variety of step-down applications under mobile environment input conditions.Low shutdown mode quiescent current of 1μA is suitable for battery-powered applications. High efficiency at light load condition is achieved by scaling down the switching frequency to reduce the switching and gate driving losses.The frequency folding technique helps prevent the inductance current from running out of control at startup. Hot shutdown provides reliable, fault tolerant operation.

H9108

The H9108 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 2A continuous output current over a wide input supply range, with excellent load and line regulation.The H9108 requires a minimal number of readily available, external components and is available in a space saving SOT23-6 package .

Switch DC/DC convert circuit

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