ST1S09IPUR Switching Voltage Regulators 2A 1.5 MHz PWM Step Down
♠ Product Description
| Product Attribute | Attribute Value |
| Manufacturer: | STMicroelectronics |
| Product Category: | Switching Voltage Regulators |
| RoHS: | Details |
| Mounting Style: | SMD/SMT |
| Package / Case: | DFN-6 |
| Topology: | Buck |
| Output Voltage: | Adjustable |
| Output Current: | 2 A |
| Number of Outputs: | 1 Output |
| Input Voltage, Min: | 2.7 V |
| Input Voltage, Max: | 6 V |
| Quiescent Current: | 1.5 mA |
| Switching Frequency: | 1.5 MHz |
| Minimum Operating Temperature: | - 40 C |
| Maximum Operating Temperature: | + 125 C |
| Series: | ST1S09 |
| Packaging: | Reel |
| Packaging: | Cut Tape |
| Packaging: | MouseReel |
| Brand: | STMicroelectronics |
| Product Type: | Switching Voltage Regulators |
| Factory Pack Quantity: | 3000 |
| Subcategory: | PMIC - Power Management ICs |
| Type: | Synchronous Buck Regulator |
| Unit Weight: | 0.000744 oz |
♠ 2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification
The ST1S09 is a step-down DC-DC converter optimized for powering low output voltage applications. It supplies a current in excess of 2 A over an input voltage range from 2.7 V to 6 V.
A high PWM switching frequency (1.5 MHz) allows the use of tiny surface-mount components.
Moreover, since the required synchronous rectifier is integrated, the number of the external components is reduced to minimum: a resistor divider, an inductor and two capacitors. The Power Good function continuously monitors the output voltage. An open drain Power Good flag is released when the output voltage is within regulation. In addition, a low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR SMD ceramic capacitors. The device is thermally protected and the output current limited to prevent damages due to accidental short circuit. The ST1S09 is available in the DFN6 (3 x 3 mm) package.
■ 1.5 MHz fixed frequency PWM with current control mode
■ 2 A output current capability
■ Typical efficiency: > 90%
■ 2 % DC output voltage tolerance
■ Two versions available: power good or inhibit
■ Integrated output over-voltage protection
■ Non switching quiescent current: (typ) 1.5 mA over temperature range
■ RDSON (typ) 100 mΩ
■ Utilizes tiny capacitors and inductors
■ Operating junction temp. -30 °C to 125 °C
■ Available in DFN6 (3 x 3 mm) exposed pad
