Linear Technology launched the LTM4625, a 5 A, 20 VIN step-down μModule® (micromodule) regulator in a 6.25 mm × 6.25 mm × 5.01 mm BGA package which, with a few passive components, fits in to 0.5 cm2 on a double-sided PCB. Like other µModule regulators, the LTM4625 includes the DC/DC controller, power switches, inductor and compensation components in a single package. Only two external ceramic capacitors (1206 case size) and a resistor (0603 case size) are required for operation. The LTM4625 operates from a 4 V to 20 V input supply, delivering a regulated output adjustable between 0.6 V and 5.5 V with ±1.5 percent accuracy over line, load and temperature.
The LTM4625 operates at a user-adjustable switching frequency from 800 kHz to 4 MHz or can be synchronised to an external clock from 700 kHz to more than 1.3 MHz. The module also provides a clock-out signal at the same frequency with selectable phase shift (90°, 120° or 180°). With the addition of an external bias supply above 4 V, the LTM4625 can operate from an input voltage as low as 2.375 V. Output overvoltage, overcurrent and overtemperature fault protection are included in the regulator.
The LTM4625 is available with guaranteed operation over the –40 °C to +125 °C internal temperature range. The μModule regulator is available for immediate delivery from stock, priced starting at $6.45 each for 1,000 piece quantities.
Summary of Features: LTM4625
- 5 A DC/DC step-down solution in less than 0.5 cm2
- Only two surface-mount ceramic capacitors and one resistor required for a complete solution
- 6.25 × 6.25 × 5.01 mm BGA package
- 4 V to 20 V VIN range
- As low as 2.375 VIN with external bias supply
- User-adjustable VOUT between 0.6 V and 5.5 V ±1.5 percent accurate over line, load and temperature
