SY21572PZS (SY70200PZS)

High Efficiency High Integration PMIC for SSD System

Parameters
Features
Description

Part number	SY21572PZS
Vin (min) (V)	2.8
Vin (max) (V)	5.5
Channel(#)	5 Chs Buck+2 Chs LDO
Application	SSD
Features	3.4MHz I2C,Hardware sleep control,Reset output,Auto PFM/FCCM control,OVP/OCP/SCP/OTP,Enable output control
Package	CSP3.23×3.23-52

• 2.8V to 5.5V Input Voltage Range

• Channel 1 Synchronous Buck:

• Low RDS(ON) for Internal Switches (PFET/NFET): 150/150mΩ

• 0.9A Maximum Output Current Capability

• Default Output Voltage VOUT1 = 1.8V

• Channel 2 LDO1:

• 0.3A Output Current Capability

• Default Output Voltage VOUT2 = 1.8V

• Channel 3 Synchronous Buck:

• Low RDS(ON) for Internal Switches (PFET/NFET): 45/20mΩ

• 4.0A Maximum Output Current Capability

• Default Output Voltage VOUT3 = 0.9V

• 0.7V to 1.1V Programmable, 10mV Step

• Channel 4 Synchronous Buck:

• Low RDS(ON) for Internal Switches (PFET/NFET): 35/45mΩ

• 4.0A Maximum Output Current Capability

• Default Output Voltage VOUT4 = 3.15V Selected by PORSEL

• 2.3625V to 3.15V Programmable, 87.5mV Step

• Channel 5 Synchronous Buck:

• Low RDS(ON) for Internal Switches (PFET/NFET): 60/40mΩ

• 2.0A Output Current Capability

• Default Output Voltage VOUT5 = 1.2V

• Channel 6 LDO2:

• 0.3A Output Current Capability

• Default Output Voltage VOUT6 = 1.8V/2.5V Selected by VSEL6

• Channel 7 Synchronous Buck:

• Low RDS(ON) for Internal Switches (PFET/NFET): 60/40mΩ

• 2.0A Output Current Capability

• Default Output Voltage VOUT7 = 1.1V/1.2V Selected by VSEL7

• Reset Input/Output Function

• 2.0MHz Switching Frequency for Buck Converters

• Auto PWM/PFM Mode or Forced PWM Mode Controlled by I2C Interface

• I2C Interface up to 3.4MHz

• Output Voltage Level of CH3/CH4 Controlled by I2C Interface with DVS

• Dedicated Sleep Mode Controlled by GPIO1/GPIO2, PMRST

• Reliable Protections:

• Overvoltage Protection (OVP)

• Overcurrent Protection (OCP)

• Short-Circuit Protection (SCP)

• Overtemperature Protection (OTP)

• Compact package: CSP3.23×3.23-52 (0.4mm pitch)

The SY21572 is a high efficiency PMIC with five-channel synchronous buck converters and two LDOs. The device offers a complete power solution for Sold-State Drive (SSD) systems.

The processor controls the output voltage of each channel using an I2C interface, and it supports DVS (Dynamic Voltage Scaling) for each channel. The SY21572 can generate an open-drain reset output for the processor with a set delay time.

The SY21572 operates over a wide input voltage range from 2.8V to 5.5V. It is available in a CSP3.23×3.23-52 package.

Evaluation Board

Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board

EVB_ SY21572PZS

EVB File

The EVB_ SY21572PZS is intended for evaluating 7-channel PMIC with 5 Step Down Buck Regulators and 2 Low Dropout LDO.

Technical Documentation

Title	Date
Silergy_Catalog_Q2_2026	2026-06-12