SY70501TDQ

Triple, Low Quiescent Current, High-Current, High Efficiency Synchronous Buck Converters with Integrated Load Switch

SY70501TDQ Triple, Low Quiescent Current, High-Current, High Efficiency Synchronous Buck Converters with Integrated Load Switch Datasheet

Parameters
Features
Description

Part number	SY70501TDQ
Vin (min) (V)	HV: 3.15, LV: 1.7
Vin (max) (V)	HV: 22, LV: 3.5
Channel(#)	3 Chs Buck + 1 LSW
Application	LPDDR5
Features	3 Ch Buck and 1 CH LSW for LPDDR5/LPDDR5X
Package	QFN3×4-23

• One-Chip Power Solution for LPDDR5/LPDDR5X with 3 Buck converters(VDD2H/VDD2L/VDDQ) and one Load Switch (VDD1)

• VDD2H_IN Wide Input Voltage Range: 3.15V~22V

• VDD2H Output Voltage: 1.065V (VREF_VDD2H=0.91V)

• VDD2H Output Current: up to 12A, Peak 18A

• VDD2H/VDD2L/VDDQ Switching Frequency: 600kHz (RMODE 0Ω/150kΩ/232kΩ), 900kHz (RMODE 50kΩ/ 100kΩ)

• VDD2H Low RON: High-side 13.5mΩ, Low-side 6mΩ

• VDD2L/VDDQ Input Voltage 1.7~3.5V

• VDD2L Output Voltage: 0.91V

• VDDQ Output Voltage: 0.515V/0.31V Controlled by VDDQ_VID

• VDD2L/VDDQ Output Current: 3A

• VDD2L/VDDQ RON: High-side 70mΩ, Low-side 30mΩ

• COT Control for Fast Transient Response

• VDD1 Output Voltage: 1.8V

• VDD1 Output Current: up to 1A, Peak 3A

• VDD1 Low RON: 25mΩ

• Auto PWM/PFM Mode to Achieve High-Efficiency

• PG Pin Indicates the Output Voltages are Ready for All Channels

• Internal Soft-start and Soft Shutdown with Special Sequence Compliant with JEDEC Requirements

• Output Discharge

• Undervoltage lockout (UVLO), Over-Current Protection (OCP), Undervoltage Protection (UVP), Overvoltage Protection (OVP), Over-Temperature Protection (OTP)

• VDD2H supports Ultra-Sonic Mode(USM)

• Compact Package: QFN3×4-23

• MSL Rating: MSL3

The SY70501 is designed for LPDDR5/LPDDR5X.It integrates 3 high efficiency synchronous Buck and a low RON load-switch (LSW). The device incorporates protections such as Undervoltage Lockout Protection (UVLO), Over-Current Protection (OCP), Undervoltage Protection (UVP), Overvoltage Protection (OVP), Over-Temperature Protection (OTP) and power-good (PG) monitor. Additionally, the SY70501 controller supports soft-start and shutdown with special sequence and can satisfy JEDEC JESID209-SA requirements.

All Buck regulators support PFM mode for light load efficiency and soft-start with pre-bias voltage. All Buck regulators adopts constant on-time (COT) control to achieve fast transient performance and excellent loop stability. All Buck regulators support 600kHz and 900kHz switching frequency controlled by an external resistor, RMODE.

Current limit value of VDD2H and the slew rate of VDDQ can be controlled by RMODE.

The output voltage of VDDQ is controlled by the level of VDDQ_VID pin.

The SY70501 can be controlled by EN and VDDQ_EN pin and it is flexible.

The SY70501 is available in QFN3×4-23 package.

Evaluation Board

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Photo of evaluation board
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EVB_SY70501TDQ

EVB File

The EVB_SY70501TDQ is intended for evaluating triple, low quiescent current, high-current, high efficiency synchronous buck converters with integrated load switch.

Technical Documentation

Title	Date
Automotive_Solutions_Q1_2026	2026-03-06
Silergy_Catalog_Q1_2026	2026-02-09