Overview
The ADP3110AKCPZ-RL, produced by onsemi, is a dual bootstrapped, 12 V MOSFET driver designed to drive the gates of both high-side and low-side power MOSFETs in synchronous buck converter topologies. This device is optimized for high current multi-phase buck regulators, particularly those converting 12 V rails directly to core voltages required by complex logic chips. It features a single PWM input signal to generate both high-side and low-side drives, making it a versatile and efficient solution for power management applications.
Key Specifications
| Characteristic | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage Range | VCC | 4.6 | - | 13.2 | V |
| Supply Current | BST = 12 V, IN = 0 V | - | 0.7 | 5.0 | mA |
| High-Side Driver Output Resistance (Sourcing) | BST - SW = 12 V | - | 2.2 | 3.4 | Ω |
| High-Side Driver Output Resistance (Sinking) | BST - SW = 12 V | - | 1.0 | 1.8 | Ω |
| Transition Times (High-Side) | BST - SW = 12 V, CLOAD = 3.0 nF | 20 | - | 55 | ns |
| Propagation Delay Times (High-Side) | BST - SW = 12 V, CLOAD = 3.0 nF | 25 | - | 55 | ns |
| Low-Side Driver Output Resistance (Sourcing) | - | - | 1.8 | 3.4 | Ω |
| Low-Side Driver Output Resistance (Sinking) | - | - | 1.0 | 1.8 | Ω |
| Transition Times (Low-Side) | CLOAD = 3.0 nF | 16 | - | 50 | ns |
| Propagation Delay Times (Low-Side) | CLOAD = 3.0 nF | 12 | - | 40 | ns |
| Operating Ambient Temperature | TA | 0 | - | 85 | °C |
| Operating Junction Temperature | TJ | 0 | - | 150 | °C |
Key Features
- All-In-One Synchronous Buck Driver
- Bootstrapped High-Side Drive
- Single PWM Signal Generates Both Drives
- Anticross Conduction Protection Circuitry
- Output Disable (OD) for Disabling the Driver Outputs
- Undervoltage Lockout (UVLO) Function
- Thermal Shutdown Function
- Pb-Free Devices
Applications
- Multiphase Desktop CPU Supplies
- Single-Supply Synchronous Buck Converters
Q & A
- What is the primary function of the ADP3110AKCPZ-RL?
The ADP3110AKCPZ-RL is a dual bootstrapped, 12 V MOSFET driver designed to drive the gates of both high-side and low-side power MOSFETs in synchronous buck converter topologies.
- What is the operating voltage range of the ADP3110AKCPZ-RL?
The device operates within a supply voltage range of 4.6 V to 13.2 V.
- How does the high-side driver work?
The high-side driver uses a bootstrap circuit to generate the gate voltage, which is referenced to the Switch Node (SW) pin and involves an external diode and bootstrap capacitor.
- What is the purpose of the Output Disable (OD) pin?
The Output Disable (OD) pin allows for disabling the driver outputs by applying a low logic level, forcing DRVH and DRVL low.
- What protection features does the ADP3110AKCPZ-RL have?
The device includes Undervoltage Lockout (UVLO) and Thermal Shutdown functions for protection.
- How does the anticross conduction protection work?
The device prevents cross conduction by monitoring the status of the external MOSFETs and applying appropriate dead-time between the turn-off of one MOSFET and the turn-on of the other.
- What are the typical applications of the ADP3110AKCPZ-RL?
The device is commonly used in multiphase desktop CPU supplies and single-supply synchronous buck converters.
- What is the recommended capacitor value for the bootstrap circuit?
The recommended capacitor value for the bootstrap circuit is between 100 nF and 1.0 μF.
- How should the power supply be decoupled?
A low ESR capacitor (1 μF to 4.7 μF multi-layer ceramic capacitor) should be placed near the power and ground pins to maintain a constant and stable supply voltage.
- Is the ADP3110AKCPZ-RL Pb-free?
