SQ40202CWUQ

Power Management Unit For DDR5 With 3 Buck Regulators and 2 LDOs

SQ40202CWUQ Power Management Unit For DDR5 With 3 Buck Regulators and 2 LDOs Datasheet

Parameters
Features
Description

Part number	SQ40202CWUQ
Vin (min) (V)	4.25
Vin (max) (V)	5.5
Channel(#)	3 Chs Buck+2 Chs LDO
Application	DDR5 Power Supply
Features	Compliant with the PMIC5100 standard of JESD301-2, SWA and SWB with programmable dual-phase/single-phase configuration, built-in multi-protection, programmable customization, current/power/temperature measurement, general status interrupt
Package	QFN3×4-28

• VIN_Bulk input supply range: 4.25 V to 5.5 V

• Three step down switching regulators: SWA, SWB & SWC

• Programmable dual phase and single phase regulator for SWA and SWB

• 2 LDO regulators: VOUT_1.8V, VOUT_1.0V

• Overclocking(OC) function

• Error injection capability

• Persistent error log registers

• Secure mode and programmable mode of operation

• Independently programmable output voltages, power up and power down sequences for switching regulators

• Output power good status reporting mechanism

• VIN_Bulk input supply protection feature: input over voltage

• Output switch regulators protection features: output over voltage, output under voltage, output current limiter

• Output current and power measurement, output current threshold mechanism

• Temperature measurement, temperature warning threshold, critical temperature shutdown

• Multi Time Programmable (MTP) non-volatile memory

• Programmable and DIMM specific registers for customization

• General Status Interrupt (GSI) function

• Flexible open drain IO (I2C) and push pull (I3C Basic) IO support

• Flexible mechanism to enable switch regulators (w/ VR_EN pin or VR enable command on I2C or I3C Basic interface)

• Idle power state (P1 State)

• 8 bits ADC

• SWA synchronous Buck converter

--Feedback reference accuracy: ±0.75%

--Typical output voltage: 1.1V

--Programmed output voltage range: 0.8V to 2.07V

--Maximum continue output current: 6A

--Programmable quasi-fixed switching frequency

--Output over voltage protection

--Output under voltage protection

--Cycle-by-cycle valley current limit

• SWB synchronous Buck converter

--Feedback reference accuracy: ±0.75%

--Typical output voltage: 1.1V

--Programmed output voltage range: 0.8V to 2.07V

--Maximum continue output current: 6A

--Programmable quasi-fixed switching frequency

--Output over voltage protection

--Output under voltage protection

--Cycle-by-cycle valley current limit

• SWC synchronous Buck converter

--Feedback reference accuracy: ±0.75%

--Typical output voltage: 1.8V

--Programmed output voltage range: 1.5V to 2.77V

--Maximum continue output current: 2A

--Programmable quasi-fixed switching frequency

--Output over voltage protection

--Output under voltage protection

--Cycle-by-cycle valley current limit

• LDO1

--Output voltage: 0.9V to 1.2V

--Minimum load capacity: 20mA

• LDO2

--Output voltage: 1.7V to 2.0V

--Minimum load capacity : 25mA

• Package: QFN3×4-28

• MSL rating: MSL1

The SQ40202C is a high efficiency low profile power management unit designed for DDR5 SODIMM as well as DDR5 UDIMM. The SQ40202C meets the PMIC5100 standard of JESD301-2. The device integrates 3 synchronous Buck converters and 2 LDOs.

SWA is a Buck regulator with a typical 1.1V output voltage in non-OC and 1.4V output voltage for OC (overclocking). The rail provides a typical 4A average current in non-OC conditions, 6A maximum average current in OC conditions. SWB is a Buck regulator with a typical 1.1V output voltage in non-OC conditions and 1.4V output voltage in OC conditions. The rail provides typical 4A average current in non-OC conditions and 6A maximum average current in OC conditions. SWA and SWB can be configured as independent or as a dual phase regulator. When used in dual phase mode, an interleaved control logic mode is used to reduce output voltage ripple. SWC is a typical 1.8V output Buck regulator. It provides 1A average and 2A maximum average current. The device features two LDOs providing output voltages of 1.8V and 1.0V respectively.

The SQ40202C includes under voltage lockout, over voltage, over current and over temperature protections to ensure reliable operation of the system.

The SQ40202C integrates an 8 bits ADC to achieve real time input voltage, output voltage, output current and temperature measurement. The host can read the measurement results through the I2C/I3C interface.

The SQ40202C is available in QFN3×4-28 package.

Evaluation Board

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EVB_SQ40202CWDQ

EVB File

The EVB_SQ40202CWUQ is intended for evaluating power management unit for DDR5 with 3 Buck regulator and 2 LDOs.

Technical Documentation

Title	Date
Automotive_Solutions_Q2_2026	2026-06-12
Silergy_Catalog_Q2_2026	2026-06-12