MAX797 Series
Step-Down Controllers with Synchronous Rectifier for CPU Power
Manufacturer: Analog Devices Inc./Maxim Integrated
Catalog
Step-Down Controllers with Synchronous Rectifier for CPU Power
| Part | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Output Type | Topology | Frequency - Switching | Mounting Type | Duty Cycle (Max) [Max] | Number of Outputs | Output Configuration | Supplier Device Package | Package / Case | Package / Case | Synchronous Rectifier | Control Features | Operating Temperature [Max] | Operating Temperature [Min] | Output Phases | Function | Clock Sync | Board Type | Outputs and Type | Outputs and Type | Supplied Contents | Voltage - Output | Utilized IC / Part | Contents | Voltage - Input [Min] | Voltage - Input [Max] | Regulator Topology | Main Purpose | Current - Output |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Analog Devices Inc./Maxim Integrated | 5 V | 30 V | Transistor Driver | Buck | 150 kHz 300 kHz | Surface Mount | 96 % | 1 | Positive | 16-SOIC | 16-SOIC | 0.154 in 3.9 mm | Enable Pulse Skipping Soft Start | 85 C | -40 ¯C | 1 | Step-Down | ||||||||||||||
 Analog Devices Inc./Maxim Integrated | 4.5 V | 30 V | Transistor Driver | Boost Buck Flyback | 150 kHz 300 kHz | Surface Mount | 96 % | 1 | Positive | 16-SOIC | 16-SOIC | 0.154 in 3.9 mm | Enable Pulse Skipping Soft Start | 70 °C | 0 °C | 1 | Step-Up Step-Up/Step-Down | ||||||||||||||
 Analog Devices Inc./Maxim Integrated | 5 V | 30 V | Transistor Driver | 150 kHz 300 kHz | Through Hole | 96 % | 1 | Positive | 16-CDIP | 16-CDIP (0.300" 7.62mm) | Enable Pulse Skipping Soft Start | 125 °C | -55 °C | 1 | Step-Down Step-Up Step-Up/Step-Down | ||||||||||||||||
Analog Devices Inc./Maxim Integrated | 4.5 V | 30 V | Transistor Driver | Boost Buck Flyback | 150 kHz 300 kHz | Surface Mount | 96 % | 1 | Positive | 16-SOIC | 16-SOIC | 0.154 in 3.9 mm | Enable Pulse Skipping Soft Start | 70 °C | 0 °C | 1 | Step-Up Step-Up/Step-Down | ||||||||||||||
Analog Devices Inc./Maxim Integrated | 5 V | 30 V | Transistor Driver | Boost Buck Flyback | 150 kHz 300 kHz | Surface Mount | 96 % | 1 | Positive | 16-SOIC | 16-SOIC | 0.154 in 3.9 mm | Enable Pulse Skipping Soft Start | 85 C | -40 ¯C | 1 | Step-Up Step-Up/Step-Down | ||||||||||||||
Analog Devices Inc./Maxim Integrated | 5 V | 30 V | Transistor Driver | Boost Buck Flyback | 150 kHz 300 kHz | Surface Mount | 96 % | 1 | Positive | 16-SOIC | 16-SOIC | 0.154 in 3.9 mm | Enable Pulse Skipping Soft Start | 85 C | -40 ¯C | 1 | Step-Up Step-Up/Step-Down | ||||||||||||||
Analog Devices Inc./Maxim Integrated | 5 V | 30 V | Transistor Driver | Buck | 150 kHz 300 kHz | Surface Mount | 96 % | 1 | Positive | 16-SOIC | 16-SOIC | 0.154 in 3.9 mm | Enable Pulse Skipping Soft Start | 85 C | -40 ¯C | 1 | Step-Down | ||||||||||||||
Analog Devices Inc./Maxim Integrated | 5 V | 30 V | Transistor Driver | Boost Buck Flyback | 150 kHz 300 kHz | Surface Mount | 96 % | 1 | Positive | 16-SOIC | 16-SOIC | 0.154 in 3.9 mm | Enable Pulse Skipping Soft Start | 85 C | -40 ¯C | 1 | Step-Up Step-Up/Step-Down | ||||||||||||||
Analog Devices Inc./Maxim Integrated | 5 V | 30 V | Transistor Driver | Boost Buck Flyback | 150 kHz 300 kHz | Surface Mount | 96 % | 1 | Positive | 16-SOIC | 16-SOIC | 0.154 in 3.9 mm | Enable Pulse Skipping Soft Start | 85 C | -40 ¯C | 1 | Step-Up Step-Up/Step-Down | ||||||||||||||
 Analog Devices Inc./Maxim Integrated | Fully Populated | 1 | 1 Non-Isolated Output Non-Isolated | Board(s) | 3.3 V | MAX797 | Board(s) | 4.5 V | 28 V | Boost Buck Flyback | DC/DC Step Up or Down | 3 A |
Description
AI
The MAX797H high-performance, step-down DC-DC converter provides main CPU power in battery-powered systems. A 40V rating on the power stage's input allows operation with high-cell-count batteries and a wide range of AC adapters. This buck controller achieves 96% efficiency by using synchronous rectification and Maxim's proprietary Idle Mode™ control scheme to extend battery life at full-load (up to 10A) and no-load outputs. Excellent dynamic response corrects output transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles. Unique bootstrap circuitry drives inexpensive N-channel MOSFETs, reducing system cost and eliminating the crowbar switching currents found in some PMOS/NMOS switch designs.The MAX797H has a logic-controlled and synchronizable fixed-frequency, pulse-width-modulating (PWM) operating mode, which reduces noise and RF interference in sensitive mobile-communications and pen-entry applications. The SKIP override input allows automatic switchover to idle-mode operation (for high-efficiency pulse skipping) at light loads, or forces fixed-frequency mode for lowest noise at all loads. The MAX797H is pin compatible with the popular MAX797, but has a higher input voltage range.The MAX797H comes in a 16-pin narrow SO package.ApplicationsIndustrial ControlsNotebook and Subnotebook Computers