The UCC3585 synchronous buck controller provides flexible high efficiency power conversion for output voltages as low as 0.9 V with ensured ±1% dc accuracy. With an input voltage range of 3.0 V to 5.5 V, it is the ideal choice for 3.3 V only, 5.0 V only, or other low voltage systems. The fixed frequency oscillator is capable of providing practical PWM operation to 500 kHz.
The UCC3585 drives a complementary pair of power MOSFET transistors. A P-channel on the high side, and an N-channel on the low side step down the input voltage at up to 90% efficiency.
A programmable two-level current limiting function is provided by sensing the voltage drop across the high side P-channel MOSFET. This circuit can be configured to provide pulse-by-pulse limiting, timed shutdown after seven consecutive faults, or latch-off after fault detection, allowing maximum application flexibility. The current limit threshold can be programmed over a wide range with a single resistor.
The UCC3585 also includes undervoltage lockout, a logic controlled enable, and softstart functions. The UCC3585 is offered in the 16-pin surface mount and through-hole packages.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Low Voltage Synchronous Buck Controller datasheet (Rev. F) | 10 Jan 2005 | |
| User guide | UCC3585 Low Voltage Synchronous Buck Converter Evaluation Board | 08 Feb 2001 | ||
| Application note | Power Supply Sequencing Solutions for Dual Supply Voltage DSPs (Rev. A) | 05 Jul 2000 |
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| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 16 | View options |
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