STMicroelectronics ST1S03
The ST1S03 is a step-down DC-DC converter optimized for powering a low voltage digital core in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause a high heating of the application environment. It provides up to 1.5 A over an input voltage range of 3 V to 16 V. The device is thermal protected and current limited to prevent damages due to an accidental short-circuit.| Part No. | ST1S03 |
|---|---|
| Datasheet | ST1S03 Download |
| Manufacturer |  STMicroelectronics |
| Description | step-down switching regulator |
| Buy | Stock & Price |
FEATURES
● Step-down current mode PWM (1.5 MHz) DC-DC converter● 2% DC output voltage tolerance
● Internal soft-start for STARTUP current limitation and power on delay of 50 - 100 µs
● Typical efficiency: > 70% over all operating conditions
● 1.5 A output current capability
● Not switching quiescent current: max 2.5 mA over temperature range
● Switch VDS: max. 350 mV at ISW = 750 mA
● Uses tiny capacitors and inductors
● Available in DFN6D 3 x 3 mm package with exposed pad Datasheet - production data
DESCRIPTION
A high switching frequency (1.5 MHz) allows the use of tiny surface-mount components: as well as the resistor divider to set the output voltage value, only an inductor, a Schottky diode and two capacitors are required. Besides, a low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR SMD ceramic capacitors. The ST1S03 device is available in a DFN6D package. Table 1. Device summary Order code Package Packaging ST1S03PUR DFN6D (3 x 3 mm) Tape and reel November 2014 This is information on a product in full production.
