Arrow Electronics and Linear Technology Keep You at the Top of the Game

Arrow Electronics and Linear Technology draw on the strength of their long-term partnership to continue to provide you with innovative ideas, including state-of-the-art options in ultralow noise DC/DC regulators.

Linear’s new family of DC/DC μModule™ regulators is designed for noise-sensitive systems that require lower EMI to meet radiation standards or lower BER (Bit Error Rate) in multigigabit/second data transmission systems. Noise is attenuated with onboard input filters, controlled slew rate, shielded inductors and careful layout. This system-in-a-package regulator family has been certified for radiated and conducted noise. The LTM®4606 has passed jitter tolerance tests for high speed data transmission in SERDES applications.

These µModule regulators provide ultra-low noise performance with high efficiency, compact package and a simple design similar to a linear regulator because of:

• Shielded inductors
• Careful layout

• On-board filters
• Controlled MOSFET gate drive
• Low input and output ripple
• Complete DC/DC circuit in a surfacemount package

Low Noise DC/DC uModule Regulators:

				Ultralow Noise Qualifications
DC/DC µModule	VIN Range	VOUT Range	lOUT	EMI	SERDES, High Speed IO	LGA Package (mm)
Narrow Voltage Range						Pin compatible 15x15x2.8
LTM4606	4.5V-28V	0.6V - 5.5V	6A	CISPR 22 Class B	Powers Multigigabit Transceivers
Wide Voltage Range
LTM4612	4.5V-36V	3.3V - 15V	6A	CISPR 22 Class B	N/A*
*I/O voltages require less than 2.5V. See LTM4606. Use LTM4612 for low noise intermediate bus voltages (≥ 3.3V).

Meets CISPR 22 Class B (Radiated Noise)	Qualified for Fast I/O SERDES, Transceivers
Fig. 1 (click to enlarge)	Fig. 2
Peak scan results of the low-noise LTM4612 module with 24Vin to 12Vout at 5A.	The eye scan shows negligible distortion by the new ultralow noise µModule regulators.

Ultralow Noise DC/DC µModule Regulators Show Excellent Results Powering RocketIO (the LTM devices are compared to a low dropout regulator (LDO))

Part Number	Power Supply Ripple (mVpp)		TJ (ps)	JIT Tool (UI)	Jit Tool (UI)	Eye Scan (UI)
	1.0V	1.2V		20 MHz	80 MHz	6CH Average
LDO (LTC3026)	7.0	3.0	58.3	0.44	0.53	0.44
LTM8023 (2A)	6.4	1.8	57.6	0.44	0.46	0.44
LTM4604 (4A)	7.1	1.8	57.0	0.47	0.47	0.44
LTM4606 (6A)	6.2	3.9	57.5	0.44	0.48	0.44
LTM4616 (2x8A)	6.2	1.9	57.0	0.41	0.47	0.44

Evaluation Tools - Register Now

• LTM®4606EV: the low noise, high efficiency, high density switch mode step-down power module.
• LTM®4612EV: the low noise, high input and output, high efficiency, high density switch mode step-down power module.