SGM64A00Q

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Automotive Grade

100V Synchronous Buck DC/DC Controller with Wide Duty Cycle Range for Automotive Applications

SGM64A00Q.PDF

The SGM64A00Q is a wide input voltage range synchronous Buck controller, supporting an input voltage range of 6.5V to 100V. The minimum high-side MOSFET on-time of 40ns effectively supports low duty cycle applications. The device can be directly applied to industrial-standard 48V high-voltage DC power supply systems, enabling step-down conversion to low-voltage power rails (e.g., 5V/12V). The SGM64A00Q is suitable for applications with stringent requirements on input voltage fluctuations, such as ADAS and HEV/EV systems.

The SGM64A00Q is feed-forward voltage-mode control architecture, which dynamically adjusts the ramp signal by sampling the input voltage (V_IN) in real-time and generating a proportional ramp signal (V_RAMP = V_IN/k_FF). This control architecture improves the transient response of the system to input voltage variations, simplifies the compensation network design, and delivers good dynamic performance and stability across a wide input voltage range.

Fixed frequency pulse width modulation (FPWM) control architecture with programmable switching frequency capability spanning 100kHz to 1MHz. It incorporates an optional discontinuous conduction mode (DCM) featuring integrated valley current detection, enabling low-side MOSFET turn-off control to minimize switching losses and reverse recovery losses during light-load operation.

The gate drive voltage is 7.5V, supporting a sink capability of 3A and a source current of 2A. An external supply can be applied to VCC to achieve higher drive voltages, supporting up to 14V for enhanced drive voltage.

The SGM64A00Q features synchronization capability, allowing the gate drive signal to synchronize with the SYNCIN clock signal, while the SYNCOUT pin outputs a clock signal with a 180° phase shift relative to the HO drive signal. This function effectively reduces input voltage ripple and minimizes EMI filter size in multi-channel or cascaded power supply applications. This device is AEC-Q100 qualified (Automotive Electronics Council Standard Q100 Grade 1) and the use of this device is suitable for automotive applications.

The SGM64A00Q also integrates the following features: programmable soft-start, a power detection module with a power-good (PG) indicator, output voltage tracking (ensuring monotonic startup with pre-biased loads), hiccup mode over-current protection, and recoverable over-temperature protection.

The SGM64A00Q is available in a Green TQFN-3.5×4.5-20BL package and specified over a junction temperature range of -40℃ to +150℃.

FEATURES

AEC-Q100 Qualified for Automotive Applications
Device Temperature Grade 1
T_A = -40℃ to +125℃
Functional Safety: Available Documentation in the Design of Functional Safety Systems
Range of Application:
- Input Voltage Range: 6.5V to 100V
- Output Voltage Range: 0.8V to 60V
- Reference Voltage: 0.8V (±1% Accuracy)
- Fixed Switching Frequency: Adjustable, 100kHz to 1MHz
Drive Timing Characteristics:
- High-side Minimum On-Time: 40ns
- Low-side Minimum On-Time: 150ns
- HO Turn-On Dead Time: 16ns
- LO Turn-On Dead Time: 18ns
Drive Capability:
- Gate Drive Voltage: 7.5V
- Current Capability: 3A Sink, 2A Source
Control Architecture: Voltage-Mode Control with Feed-Forward Compensation
Power Management and Protection:
- EN: Configurable Power-On/Off Thresholds
- VIN UVLO: Hysteretic Under-Voltage Lockout for Input Voltage
- VCC UVLO: Hysteretic Under-Voltage Lockout for Gate Drive Supply
Adjustable Soft-Start: Programmable Startup Time
Conduction Mode Configuration: Selectable DCM or CCM Operation
PGOOD: Power-Good Indicator
Synchronization: Support Parallel or Cascaded Operation for Phase Management
Current Sensing and Protection:
- Low-side MOSFET RDSON or External Sense Resistor Current Sensing
- Hiccup Mode Over-Current Protection
Over-Temperature Protection: +175°C Thermal Shutdown with Hysteresis
Available in a Green TQFN-3.5×4.5-20BL Package

APPLICATIONS

Automotive Motor Drives
ADAS (Advanced Driver Assistance Systems)
High-Power Automotive DC/DC Regulator
HEV/EV Powertrain Systems
Body Electronics and Lighting
Infotainment and Cluster

Ordering Information

Part Number	Status	Package	Pins	Pd-Free	RoHS	REACH	Green	MSL Rating	Operating Temperature Range	Material Content	Reliability Report	Unit Resale Price* (Volume Range: in USD)	Lead Time** (Volume Range: Days)
SGM64A00QTVM20G/TR	Active	TQFN-3.5×4.5-20BL	20	YES	YES	YES	YES	MSL2	-40℃ to +125℃	View	View

* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.

** The lead time provided is for reference purposes only and is subject to change based on different circumstances.