• 2.8V to 5.5V input voltage range
• Channel 1 synchronous buck:
• Low RDS(ON) for internal switches (PFET/NFET): 150/150 mΩ
• 0.9A maximum output current capability.
• Default Output Voltage VOUT1=1.2V
• 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): 45/20 mΩ
• 4.0A maximum output current capability.
• Default output voltage VOUT3=0.8V.
• 0.7V to 1.1V programmable, 10mV step.
• Channel 4 synchronous buck:
• Low RDS(ON) for internal switches (PFET/NFET): 35/45 mΩ
• 4.0A maximum output current capability.
• Default output voltage VOUT4=2.625V
• 2.3625V to 3.15V programmable, 87.5mV step.
• Channel 5 synchronous buck:
• Low RDS(ON) for internal switches (PFET/NFET): 60/40 mΩ
• 2.0A output current capability.
• Channel 6 LDO2:
• 0.3A output current capability.
• Channel 7 synchronous buck:
• Low RDS(ON) for internal switches (PFET/NFET): 60/40 mΩ
• 2.0A output current capability.
• 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 I¬2C interface with DVS function
• 2 kinds of power on reset detection voltage level selected by PORSEL pin
• Dedicated sleep mode controlled by GPIO1/GPIO2, PMRST
• Reliable Protections:
• Over Voltage Protection (OVP)
• Over Current Protection (OCP)
• Short Circuit Protection (SCP)
• Over Temperature Protection (OTP)
• Compact package: CSP3.23x3.23-52(0.4mm pitch)

The SY21523E is a high efficiency PMIC with 5-channel synchronous buck converters and 2-channel LDOs.  It is a single chip total power solution for SSD system.

The output voltage of each channel is controlled by the processor using I­2C interface. It therefore supports DVS (Dynamic Voltage Scaling) function for each channel.  The SY21523E can generate an open-drain reset output for the processor with certain delay time.

The SY21523E operates over a wide input voltage range from 2.8V to 5.5V. It is available in CSP3.23x3.23-52 package.