Lt8609 - 2A/3A Peak Synchronous Step-Down Regulator With 2.5Μa Quiescent Current; Lt8620 - 65V, 2A Synchronous Step-Down Regulator With 2.5Μa Quiescent Current; Ltc3121 - 1.5A Synchronous Step-Up Dc/Dc Converter - Analog Devices EVAL-AD2428WD1BZ Manual

LT8609 - 2A/3A Peak Synchronous Step-Down Regulator with 2.5μA Quiescent Current
LT8609 - 2A/3A Peak Synchronous Step-Down Regulator with
2.5μA Quiescent Current
The LT8609 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that
consumes only 1.7μA of non switching quiescent current. The LT8609 can deliver 2A of continuous current with
peak loads of 3A (<1sec). Burst Mode operation enables high efficiency down to very low output currents while
keeping the output ripple below 10mVP-P. A SYNC pin allows synchronization to an external clock, or spread spec-
trum modulation for low EMI operation. Internal compensation with peak current mode topology allows the use of
small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V
threshold and can be used to program VIN UVLO or to shut down the part. A capacitor on the TR/SS pin pro-
grams the output voltage ramp rate during start-up while the PG flag signals when VOUT is within ±8.5% of the
programmed output voltage as well as fault conditions.
LT8620 - 65V, 2A Synchronous Step-Down Regulator with 2.5μA
Quiescent Current
The LT8620 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that
accepts a wide input voltage range up to 65V, and consumes only 2.5μA of quiescent current. Top and bottom pow-
er switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst
Mode operation enables high efficiency down to very low output currents while keeping the output ripple below
10mV . A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode
P-P
topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV
pin has an accurate 1V threshold and can be used to program V undervoltage lockout or to shut down the
IN
LT8620 reducing the input supply current to 1μA. A capacitor on the TR/SS pin programs the output voltage ramp
rate during start-up. The PG flag signals when V is within ±9% of the programmed output voltage as well as
OUT
fault conditions. The LT8620 is available in small 16-Lead MSOP and 3mm × 5mm QFN packages with exposed
pads for low thermal resistance.

LTC3121 - 1.5A Synchronous Step-Up DC/DC Converter

The The LTC3121 is a synchronous step-up DC/DC converter with true output disconnect and inrush current lim-
iting. The 1.5A current limit along with the ability to program output voltages up to 15V makes the LTC3121 well
suited for a variety of demanding applications. Once started, operation will continue with inputs down to 500mV,
extending run time in many applications.
The LTC3121 features output disconnect in shutdown, dramatically reducing input power drain and enabling
VOUT to completely discharge. Adjustable PWM switching from 100kHz to 3MHz optimizes applications for
highest efficiency or smallest solution footprint. The oscillator can also be synchronized to an external clock for
noise sensitive applications. Selectable Burst Mode operation reduces quiescent current to 25μA, ensuring high effi-
ciency across the entire load range. An internal soft-start limits inrush current during start-up.
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EVAL-AD2428WD1BZ A B Evaluation Board Manual