Analog Devices Inc. LT8337/LT8337-1 Silent Switcher® Converter

Analog Devices Inc. LT8337/LT8337-1 Step-Up Silent Switcher® Converter is a low I_Q, synchronous step-up DC-DC converter. It features Silent Switcher architecture and optional spread spectrum frequency modulation (SSFM) to minimize EMI emissions while delivering high efficiencies at high switching frequencies. The wide input/output voltage range, low V_IN pin quiescent current in Burst Mode operation, and 100% duty-cycle capability for the synchronous MOSFET in PassThru operation (V_IN > V_OUT) make the LT8337/LT8337-1 ideally suited for battery-powered systems and general-purpose step-up applications.

The LT8337/LT8337-1 integrates 28V, 5A power switches, operating at a fixed switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. The LT8337/LT8337-1 features output soft-start and output overvoltage lockout. The LT8337-1 allows external compensation via the VC pin for a fast transient response. The LT8337 offers an output Power Good flag via the PG pin.

The Analog Devices Inc. LT8337/LT8337-1 Silent Switcher is offered in a space-saving LQFN-16 package.

Features

Silent Switcher architecture
- Ultra-low EMI emissions
- Optional Spread-Spectrum frequency modulation
Integrated 28V, 5A power switches
Low V_IN pin quiescent current
- 0.3μA in shutdown
- 4μA in Burst Mode® operation (LT8337)
- 15μA in PassThru™ (LT8337)

2.7V to 28V wide input voltage range
Output voltage programmable up to 26V
100% duty cycle capability for synchronous MOSFET
External compensation (fast transient response (LT8337-1))
Power Good monitor (LT8337)
300kHz to 3MHz adjustable and synchronizable
Pulse-skipping or Burst Mode operation at light load
Small 16-lead (3mm × 3mm) LQFN package

Applications

Battery-powered systems
General purpose step-up

Analog Devices Inc. LT8337/LT8337-1 Silent Switcher® Converter

Features

Applications

Typical Application

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