Features: Input Range: Up to 30V
1A On-Chip Power Switch
Adjustable Output (MAX830)
Fixed Outputs: 5V (MAX831)
3.3V (MAX832)
3V (MAX833)
100kHz Switching Frequency
Excellent Dynamic Characteristics
Few External Components
8mA Quiescent Current
16-Pin SO Package
Evaluation Kit AvailableApplicationDistributed Power from High-Voltage Buses
High-Current, High-Voltage Step-Down Applications
Multiple-Output Buck ConverterPinout
SpecificationsInput Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .40V
Switch Voltage with Respect to Input Voltage. . . . . . . . . . . . . . . . .50V
Switch Voltage with Respect to GND
(VSW negative) (Note 1). . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .20V
FB/SENSE Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. -0.3V, +10V
SHUT Voltage (not to exceed VIN) . . . . . . . . . . . . . . . . . . . . . . . . . .30V
ILIM Voltage (forced). . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .. . . 5.5V
Operating Temperature Range. . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . 0°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65°C to +160°C
Lead Temperature (soldering, 10sec). . . . . . . . . . . . . . . . . . . . .+300°C
Note 1: Do not exceed switch-to-input voltage limitation.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating onditions for extended periods may affect device reliability.
DescriptionThe MAX830/MAX831/MAX832/MAX833 are monolithic, bipolar, pulse-width-modulation (PWM), switch-mode, tepdown DC-DC regulators. Each is rated at 1A. Very few external components are needed for standard operation because the power switch, oscillator, feedback, and control circuitry are all on-chip. Employing a classic buck topology, these regulators MAX833 perform high-current step-down functions.
These regulators MAX833 have excellent dynamic and transient response characteristics, while featuring cycle-by-cycle urrent limiting to protect against overcurrent faults and shortcircuit output faults. They have a wide 8V to 30V input range. Outputs for the MAX831/MAX832/MAX833 are fixed at 5V/3.3V/3V, respectively. The MAX830 output is adjustable.
Available in 16-pin SO packages, the MAX830MAX833 have a preset 100kHz oscillator frequency. In addition, the preset current limit and micropower shutdown can be externally controlled. See the MAX724/MAX726 data sheet for more applications information.
MAX833 Data Sheet
