LTC3203EDD#TRPBF

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The LTC3203EDD#TRPBF DC-DC switching regulator is a multi-function Power Management Integrated Circuit (PMIC) designed specifically for battery-powered applications. The LTC3203EDD#TRPBF manages the power delivery of multiple loads and is especially suited for low-voltage battery designs. The device employs an internal power MOSFET to switch at a frequency of 280kHz or 500kHz, allowing for high efficiency and small external component requirements. The LTC3203EDD#TRPBF\'s features and high-current capability make it ideal for numerous battery-powered applications such as cell phone power management, portable gaming systems, and high-performance portable media players.

The LTC3203EDD#TRPBF integrates a 0.45V bandgap reference, a high-precision temperature-compensated voltage regulator, a high-side current-sense amp with programmable current limits and shutdown inputs, a power MOSFET gate driver, a low-noise PWM converter, a non-overlapping control circuit for dual-phase operation, and low dropout (LDO) linear regulation. Integrating these features enables the LTC3203EDD#TRPBF to manage multiple loads from the same Li-Ion battery. The device is highly programmable and supports a wide input supply range of 2.5V to 6V, making it suitable for a broad range of applications.

The LTC3203EDD#TRPBF is specified for power-saving operation over the -40°C to 125°C temperature range. Its switching frequency is adjustable between 280kHz and 500kHz through the use of an external resistor divider, allowing flexibility in meeting system needs while maximizing efficiency. The adjustable switching frequency also enables the device to scale power delivery with an adjustable duty cycle to reduce ripple. The device also provides a thermal warning output that latches off when junction temperature exceeds 160°C.

The LTC3203EDD#TRPBF offers multiple output voltage options. It can implement a single-stage PWM topology and produce a single output at up to 3.3V, or it can provide up to two outputs with a buck-boost regulator topology. The device includes an internal 250mA LDO (LDO_IN) for charging backup or bypassing batteries, as well as low-dropout linear control for the main battery power paths. The device also integrates a 3.2V, 0.15Ω series N-channel MOSFET, allowing for high-current applications with fewer external components.

To achieve the highest system performance in battery-powered applications, the LTC3203EDD#TRPBF employs a 2-phase architecture. It consists of two power MOSFETs, each with its own separate control loop and transformer windings, during switching. This results in reduced ripple current and lower RDS(on) dissipation of the main switch, ensuring reduced power loss and improved system efficiency. The device also supports synchronization of two or more converters to reduce input capacitance and noise at the input, as well as ripple modulation for decreased ripple voltage at the output.

The LTC3203EDD#TRPBF is available in an MSOP-16 and an MSOP-10 package and is specified for use over the -40°C to 125°C temperature range. The device meets the stringent requirements of a variety of power management applications, including cell phone and other battery-powered devices, as well as portable and desktop media players.

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