The LT8610A/LT8610ABEMSE#PBF series are compact, high efficiency, high speed synchronous monolithic step-down switching regulators that consume only 2.5μA of quiescent current. Compared to the LT8610, they have higher maximum output currents of 3.5A and a faster minimum switch-on time of 30ns. The LT8610A has the same low ripple burst mode performance of the LT8610, while the LT8610ABEMSE#PBF has even higher light load efficiency.
The other features of the LT8610 remain unchanged in the LT8610A/LT8610ABEMSE#PBF series. A SYNC pin allows synchronization to an external clock. The EN/UV pin has an accurate 1V threshold for VIN undervoltage lockout or shut down. A capacitor on the TR/SS pin programs the output voltage ramp rate during startup. The PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions.
FEEDBACK VOLTAGEMIN VINOUTPUT CURRENTNOTESLT8610AC-10.80V3.0V3.5AFsw = 1.5MHz to 2.2MHz, Optimized Transient ResponseLT8610AC0.80V3.0V3.5AFsw = 200kHz to 2.2MHzLT8610AB0.97V3.4V3.5AImproved Burst Mode EfficiencyLT8610AX0.97V3.4V3.5A175°C Max Junction TempLT8610A0.97V3.4V3.5AHigher Iout, 30ns Min On TimeLT86100.97V3.4V2.5A-
Feature
- LT8610 Feature Set, Plus:
- 3.5A Maximum Output Current Fast
- 30ns Minimum Switch-On Time
- Improved Burst Mode Efficiency (LT8610AB Only)
- Improved EMI
- Wide Input Voltage Range: 3.4V to 42V
- Ultralow Quiescent Current Burst Mode® Operation:
- 2.5μA IQ Regulating 12VIN to 3.3VOUT
- Fixed Output Voltages: 3.3V, 5V
- Output Ripple < 10mVP-P (LT8610A Only)
- High Efficiency Synchronous Operation:
- 95% Efficiency at 1A, 5VOUT from 12VIN
- 93% Efficiency at 1A, 3.3VOUT from 12VIN
- Low Dropout Under All Conditions: 200mV at 1A
- Safely Tolerates Inductor Saturation in Overload
- Adjustable and Synchronizable Frequency:
- 200kHz to 2.2MHz
- Accurate 1V Enable Pin Threshold
- Output Soft-Start and Tracking
- Small Thermally Enhanced 16-Lead MSOP Package
Applications
- Automotive and Industrial Supplies
- GSM Power Supplies
