1. General Description:

️· The ACE740E is a wide input range (4.5V - 18V), high-efficiency (up to 95% at light load), 4A DC-DC step-down switching regulator.
️· It integrates a synchronous MOSFET pair, eliminating the need for an external Schottky diode.
️· It employs a proprietary control scheme for improved efficiency at light loads.
️· Packaged in an ESOP8.

2. Key Features:

️· Wide Input Range: 4.5V to 18V
️· High Efficiency: Up to 95% at light load
️· 4A Output Current
️· Integrated Synchronous MOSFETs: Eliminates external Schottky diode
️· Current Mode Control: Provides stable operation
️· 0.923V Reference: For low output voltages
️· Logic Control Shutdown: Enables power management
️· Thermal Shutdown & UVLO: Provides protection
️· ESOP8 Package: Space-saving solution

3. Electrical Characteristics:

️· Input Voltage Range: 4.2V to 18V
️· Input UVLO Threshold: 3.55V
️· Output Voltage Reference: 0.923V
️· High-Side MOSFET On Resistance: 90 mΩ
️· Low-Side MOSFET On Resistance: 85 mΩ
️· Output Current Limit: 5A
️· Thermal Shutdown Temperature: 150°C

4. Functional Description & Operation:

️· The regulator uses a PWM current-mode control scheme for stable operation.
️· Current Limiting: A cycle-by-cycle current limit of 5A protects the device.
️· Light Load Efficiency: A proprietary control scheme enables a power-save mode for improved efficiency at light loads.

5. Application Information & Component Selection:

VOUT(V)	COUT (µF)	L (µH)
1.2	22\*2	3.3
1.8	22\*2	4.7
2.5	22\*2	6.8
3.3	22\*2	10
5	22\*2	15
8	22\*2	22

️· Pin Descriptions: (See original sheet for table) Explains the purpose of each pin (BST, IN, SW, GND, FB, COMP, EN, SS).

6. Important Considerations / Cautions:

️· ACE does not assume responsibility for use in life-support systems without express approval.
️· Adhere to the absolute maximum ratings to prevent damage.



This comprehensive summary encapsulates the key aspects of the ACE740E data sheet, offering a clear understanding of its capabilities and usage guidelines.