LTM4651 DC/DC µModule® Regulator

Linear’s non-isolated inverting output μModule regulator that can generate -26.5 V to -0.5 V output from a positive input supply voltage

Linear Technology's LTM4651 is an ultra-low noise, 58 V, 24 W DC/DC µModule inverting topology regulator. It regulates a negative output voltage (V_OUT-) from a positive input supply voltage (V_IN), and is designed to meet the radiated emissions requirements of EN55022. Conducted emission requirements can be met by adding standard filter components.

Included in the package are the switching controller, power MOSFETs, inductor, filters, and support components. The LTM4651 can regulate V_OUT to a value between -0.5 V and -26.5 V, provided that its input and output voltages adhere to the safe operating area criteria of the LTM4651: V_IN + | V_OUT- | ≤ 58 V. A switching frequency range of 250 kHz to 3 MHz is supported (400 kHz default) and the module can synchronize to an external clock.

Despite being an inverting topology regulator, no level shift circuitry is needed to interface to the LTM4651’s RUN, PGOOD, or CLKIN pins; those pins are referenced to GND.

The LTM4651 is offered in a 15.0 mm x 9.0 mm x 5.01 mm BGA package with SnPb or RoHS compliant terminal finish.

Typical Application		Output Current Capability
Features
Wide input voltage range: 3.6 V to 58 V EN55022 Class B compliant Up to 4 A output current 24 W output from 12 VIN to -24 VOUT, PLOSS = 5 W, TA = 60°C, tRISE = 60°C, 200 LFM Output voltage range: -26.5 V ≤ VOUT- ≤ -0.5 V Safe operating area: VIN + | VOUT- | ≤ 58 V n ±1.67% total DC output voltage error over line, load, and temperature (-40°C to +125°C)		Complete low EMI switch mode power supply Parallel and current share with multiple LTM4651s Constant-frequency current mode control Frequency synchronization range: 250 kHz to 3 MHz Power good indicator and programmable soft-start Overcurrent / overvoltage / overtemperature protection 15.0 mm x 9.0 mm x 5.01 mm BGA package
Applications
Avionics, industrial control, and test equipment Video, imaging, and instrumentation		48 V telecom and network power supplies RF systems