- LT8610 Feature Set, Plus:
- 3V Minimum Input Voltage
- 800mV Feedback Voltage
- 3.5A Maximum Output Current
- Fast 30ns Minimum Switch-On Time
- Improved Burst Mode Efficiency
- Improved EMI
- Wide Input Voltage Range: 3V to 42V
- Ultralow Quiescent Current Burst Mode® Operation:
- 2.5μA IQ Regulating 12VIN to 3.3VOUT
- Low Dropout Under All Conditions: 200mV at 1A
- High Efficiency Synchronous Operation:
- 95% Efficiency at 1A, 5VOUT from 12VIN
- 93% Efficiency at 1A, 3.3VOUT from 12VIN
- Safely Tolerates Inductor Saturation in Overload
- Adjustable and Synchronizable Frequency:
- LT8610AC: 200kHz to 2.2MHz
- LT8610AC-1: 1.5MHz to 2.2MHz
- Accurate 1.015V Enable Pin Threshold
- Output Soft-Start and Tracking
- Small Thermally Enhanced 16-Lead MSOP Package
- AEC-Q100 Qualified for Automotive Applications
The LT8610AC/LT8610AC-1 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Compared to the LT8610AB, the LT8610AC/LT8610AC-1 has a lower feedback voltage of 800mV and a lower minimum VIN of 3V. The LT8610AC/LT8610AC-1 has the same additional features of the LT8610AB as compared to the LT8610: higher maximum output current of 3.5A, faster minimum on time of 30ns, and higher light load efficiency.
The LT8610AC/LT8610AC-1 has a SYNC pin for synchronization to an external clock. A capacitor on the TR/SS pin programs the output voltage ramp rate during startup. The PG flag signals when VOUT is within ±8% of the programmed output voltage as well as fault conditions. The LT8610AC-1 has internal compensation optimized for high switching frequencies resulting in improved transient response compared to the LT8610AC. The LT8610AC-1 also has a feature which will soft-start the part when exiting dropout or brownout conditions reducing output voltage overshoot.
| Feedback Voltage | Min VIN | Output Current | Notes | |
| LT8610AC-1 | 0.80V | 3.0V | 3.5A | FSW = 1.5MHz to 2.2MHz, Optimized Transient Response |
| LT8610AC | 0.80V | 3.0V | 3.5A | FSW = 200kHz to 2.2MHz |
| LT8610AB | 0.97V | 3.4V | 3.5A | Improved Burst Mode Efficiency |
| LT8610AX | 0.97V | 3.4V | 3.5A | 175°C Max Junction Temp |
| LT8610A | 0.97V | 3.4V | 3.5A | Higher IOUT, 30ns Min On Time |
| LT8610 | 0.97V | 3.4V | 2.5A | – |
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