The LTC1872ES6#TRMPBF is a constant frequency current mode step-up DC/DC Controller providing excellent AC and DC load and line regulation. The device incorporates an accurate under-voltage lockout feature that shuts down the LTC1872 when the input voltage falls below 2.0V. The LTC1872 boasts ±2.5% output voltage accuracy and consumes only 270μA of quiescent current. For applications where efficiency is a prime consideration, the LTC1872 is configured for Burst Mode? operation, which enhances efficiency at low output current. In shutdown, the device draws a mere 8μA. The high 550kHz constant operating frequency allows the use of a small external inductor. The overvoltage comparator in the LTC1872 will turn the external MOSFET off when the feedback voltage has risen 7.5% above the reference voltage of 0.8V. This comparator has a typical hysteresis of 20mV.
- High efficiency up to 90%
- High output currents easily achieved
- VOUT limited only by external components
- Constant frequency 550kHz operation
- Burst Mode? operation at light load
- Current mode operation for excellent line and load transient response
- Low quiescent current (270μA)
- Shutdown mode draws only 8μA supply current
- ±2.5% Reference accuracy
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