MAX5096
40V, 600mA Buck Converters with Low-Quiescent-Current Linear Regulator Mode
Industry's First Automotive Buck Converter with Low IQ LDO Mode Operates Seamlessly from 4V Cold Crank to 40V Input
Part Details
- High-Efficiency Switcher Mode (Buck Mode) or Low-Quiescent-Current Linear Regulator (LDO Mode) Operation
- Wide Operating Input Voltage Range
- +5V to +40V Buck Mode
- +4V to +40V LDO Mode
- Fixed 3.3V or 5V and Adjustable (1.24V to 11V) Output Voltage Versions
- 6µA (typ) Shutdown Current
- Fixed 135kHz or 330kHz Switching Frequency
- External Frequency Synchronization
- Programmable Soft-Start
- Integrated Microprocessor Reset (Active-Low RESET) Circuit with Programmable Timeout Period
- Thermal and Short-Circuit Protection
- -40°C to +125°C Automotive Temperature Range
- Thermally-Enhanced Package Dissipates
- 2.6W at TA = +70°C (16-Pin TQFN)
- 1.7W at TA = +70°C (20-Pin TSSOP)
The MAX5096/MAX5097 easy-to-use, Dual Mode™, DC-DC converters operate as LDO (low dropout) or switch-mode buck converters. At a high output load, the converters operate as high-efficiency pulse-width-modulated (PWM) switch-mode converters and reduce the power dissipation. The devices switch to a low-quiescent-current (IQ) LDO mode of operation at light load. During the key-off condition, the system's microcontroller drives the LDO/active-low BUCK input on the fly and forces the MAX5096/MAX5097 into LDO Mode, thereby reducing the quiescent current significantly.
In Buck Mode, the MAX5096/MAX5097 operate from a 5V to 40V input voltage range and deliver up to 600mA of load current with excellent load and line regulation. The fixed-switching frequency versions of 135kHz and 330kHz are available. The MAX5096/MAX5097 DC-DC internal oscillator can be synchronized to an external clock. External compensation and a current-mode control scheme make it easy to design with.
In LDO Mode, the MAX5096/MAX5097 operate from a 4V to 40V input voltage. The LDO Mode operation is intended for a lower output load current of up to 100mA. The quiescent current at 100µA load in LDO Mode is only 41µA (typ).
The MAX5096/MAX5097 feature an enable input that shuts down the device, reducing the current consumption to 6µA (typ). Additional features include a power-on reset output with a capacitor-adjustable timeout period, programmable soft-start, output tracking, output overload, short-circuit and thermal shutdown protections.
The MAX5096/MAX5097 operate over the -40°C to +125°C automotive temperature range and are available in thermally enhanced 20-pin TSSOP or 16-pin TQFN packages.
Applications
- Home Security/Safety
Hardware Ecosystem
Parts | Product Life Cycle | Description |
---|---|---|
Internal Power Switch Buck Regulators 3 | ||
MAX5097 | PRODUCTION | 40V, 600mA Buck Converters with Low-Quiescent-Current Linear Regulator Mode |
MAX5080 | PRODUCTION | 1A, 40V, MAXPower Step-Down DC-DC Converters |
MAX5033 | PRODUCTION | 500mA, 76V, High-Efficiency, MAXPower Step-Down DC-DC Converter |
Evaluation Kits
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