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Switching Regulator - Switching Regulators 
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Key Features
Applications/Uses
Parametric specs for Step-Up Switching Regulators
| VIN (V) (min) | 2.5 |
| VIN (V) (max) | 5.5 |
| VOUT1 (V) (min) | 2.5 |
| VOUT1 (V) (max) | 100 |
| IOUT1 (A) (max) | 1 |
| Switch Type | External |
| Output Adjust. Method | Resistor |
| IQ (mA) (typ) | 0.025 |
| Shutdown Mode Supply Current (µA) (typ) | 0.001 |
| Shutdown Mode Supply Current (µA) (max) | 1 |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 1000 |
| Package/Pins | SOT23/6 |
| Budgetary Price (See Notes) | 1.19 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | Simple SOT23 Boost Controllers | Aug 17, 2010 | |
| App Note | Single-Inductor Circuit Generates Bipolar Supply Voltages | ||
| App Note | Converter Boosts One-Cell Battery Voltage to 50V |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Parametric specs for Step-Up Switching Regulators
| VIN (V) (min) | 2.5 |
| VIN (V) (max) | 5.5 |
| VOUT1 (V) (min) | 2.5 |
| VOUT1 (V) (max) | 100 |
| IOUT1 (A) (max) | 1 |
| Switch Type | External |
| Output Adjust. Method | Resistor |
| IQ (mA) (typ) | 0.025 |
| Shutdown Mode Supply Current (µA) (typ) | 0.001 |
| Shutdown Mode Supply Current (µA) (max) | 1 |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 1000 |
| Package/Pins | SOT23/6 |
| Budgetary Price (See Notes) | 1.19 |
Key Features
- Simple, Flexible Application Circuit
- 2-Cell NiMH or Alkaline Operation (MAX1524)
- Low Quiescent Current (25µA typ)
- Output Fault Protection and Soft-Start
- High Efficiency Over 1000:1 IOUT Range
- Pin-Selectable Maximum Duty Factor
- Micropower Shutdown Mode
- Small 6-Pin SOT23 Package
- No Current-Sense Resistor
Applications/Uses
- Industrial +24V and +28V Power Supplies
- LCD Bias Supplies
- Low-Cost Battery-Powered Applications
- Low-Cost, High-Current, or High-Voltage Boost Conversion
- Low-Cost, Multi-Output Flyback Converters
- SEPIC Converters
Description
The MAX1522/MAX1523/MAX1524 are simple, compact boost controllers designed for a wide range of DC-DC conversion topologies, including step-up, SEPIC, and flyback applications. They are for applications where extremely low cost and small size are top priorities. These devices are designed specifically to provide a simple application circuit and minimize the size and number of external components, making them ideal for PDAs, digital cameras, and other low-cost consumer electronics applications.
These devices use a unique fixed on-time, minimum off-time architecture, which provides excellent efficiency over a wide-range of input/output voltage combinations and load currents. The fixed on-time is pin selectable to either 0.5µs (50% max duty cycle) or 3µs (85% max duty cycle), permitting optimization of external component size and ease of design for a wide range of output voltages.
The MAX1522/MAX1523 operate from a +2.5V to +5.5V input voltage range and are capable of generating a wide range of outputs. The MAX1524 is intended for bootstrapped operation, permitting startup with lower input voltage. All devices have internal soft-start and short-circuit protection to prevent excessive switching current during startup and under output fault conditions. The MAX1522/MAX1524 have a latched fault mode, which shuts down the controller when a short-circuit event occurs, whereas the MAX1523 reenters soft-start mode during output fault conditions. The MAX1522/MAX1523/MAX1524 are available in a space-saving 6-pin SOT23 package.
These devices use a unique fixed on-time, minimum off-time architecture, which provides excellent efficiency over a wide-range of input/output voltage combinations and load currents. The fixed on-time is pin selectable to either 0.5µs (50% max duty cycle) or 3µs (85% max duty cycle), permitting optimization of external component size and ease of design for a wide range of output voltages.
The MAX1522/MAX1523 operate from a +2.5V to +5.5V input voltage range and are capable of generating a wide range of outputs. The MAX1524 is intended for bootstrapped operation, permitting startup with lower input voltage. All devices have internal soft-start and short-circuit protection to prevent excessive switching current during startup and under output fault conditions. The MAX1522/MAX1524 have a latched fault mode, which shuts down the controller when a short-circuit event occurs, whereas the MAX1523 reenters soft-start mode during output fault conditions. The MAX1522/MAX1523/MAX1524 are available in a space-saving 6-pin SOT23 package.
Technical Docs
| Data Sheet | Simple SOT23 Boost Controllers | Aug 17, 2010 | |
| App Note | Single-Inductor Circuit Generates Bipolar Supply Voltages | ||
| App Note | Converter Boosts One-Cell Battery Voltage to 50V |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Request a Quote