56A Single-Output Integrated Voltage Regulator

Fe1736 is a single-output, 16-phase integrated DC-DC step-down power converter
delivering up to 56A output current in a compact 19.96 mm² package.

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Fe1736 - Product Overview

The Fe1736 integrated voltage regulator is a single-output, self-contained power SoC designed for compact and efficient point-of-load voltage regulation.

At its core is a 16-phase interleaved buck converter with a fully integrated powertrain, including Ferric’s ferromagnetic power inductors. The device combines high-performance FETs, capacitors, digital control, power management, and monitoring functions in a single compact package.

Its high switching frequency and wide loop bandwidth enable fast transient response and precise voltage regulation while reducing board area, layout complexity, and external component count.

Key Features

Single-output, 18-phase interleaved buck converter

Up to 56A steady-state output current

90% peak efficiency at 56A output

Fully integrated power switches and inductors

31MHz typical switching frequency

Wide loop bandwidth of 10MHz

Differential point-of-load (PoL) sensing

1.6V to 2.0V input voltage range

0.25V to 1.5V output voltage range

Compact 20.4 mm² package with 2.8 A/mm² current density

Gang operation with up to 32 devices in parallel

Automatic phase shedding

Dynamic Voltage Scaling (DVS)

Input/output voltage, current, and temperature telemetry

1MHz PMBus 1.3-compliant serial interface

50MHz AVSBus 1.4-compliant serial interface

Comprehensive fault protection: UVLO, UVP, OVP, OCP, OTP

Ultra-thin 0.725mm package thickness

µLGA package with gold-plated pads

Fully integrated powertrain for reduced board area and complexity

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
VIN Voltage Range	V_IN	AVDD18 ≥ V_IN	1.6	1.8	2.0	V
Output Voltage Range	V_OUT	V_IN ≥ 1.8V	0.25		1.5	V
Output Voltage Resolution	V_OUT,RES			1.7		mV
Steady State Output Current	I_OUT				56	A
Number of Powertrain Phases	N_PHASES		2		18	Phases
Width	W		3.540	3.580	3.620	mm
Length	L		5.637	5.687	5.737	mm
Area	A			20.4		mm²
Thickness	T		0.705	0.725	0.745	mm
Current Density (TDC)	j_max,TDC				2.8	A/mm²
DC Line Regulation	(ΔV_OUT/V_OUT)_Line	V_IN = [1.6, 2.0]V		± 0.5		%
DC Load Regulation	(ΔV_OUT/V_OUT)_Load	I_OUT = [0, 56]A		± 0.5		%
Switching Frequency	f_SW		25	31	100	MHz
Junction Temperature	T_J		-40		125	°C
Thermal Resistance Junction to Top	Θ_JC,TOP			0.1		°C/W
Thermal Resistance Junction to Bottom	Θ_JC,BOT			3.7		°C/W

FAQ - Fe1736

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