Topology | Buck Converter |
Input voltage | 2.8-4 V |
Switching frequency | 1200-1900 kHz |
Output 1 | 3.3 V / 3 A |
IC revision | 5 |
The AST1S31 device is an internally compensated 1.5 MHz fixed-frequency PWM synchronous step-down regulator. The AST1S31 device operates from 2.8 V to 4 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.The AST1S31 integrates a 70 mΩ high-side switch and a 55 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.The peak current mode control with an internal compensation deliver a very compact solution with a minimum component count.The AST1S31 device is available in a 3 x 3 mm, 8 leads VFDFPN package.
Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | IRP,40K (A) | ISAT (A) | RDC max. (mΩ) | fres (MHz) | Size | Version | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | Material | Samples | |
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744770015 | SPEC | 8 files | WE-PD SMT Power Inductor | 1.5 | 19 | 19 | 5 | – | 1280 | Standard | – | – | – | – | |||
744310150 | SPEC | 8 files | WE-HCI SMT Flat Wire High Current Inductor | 1.5 | 9.6 | – | 13.97 | 80 | 7030 | SMT | 4.75 | 12 | 12.7 | Superflux | |||
744310200 | SPEC | 8 files | WE-HCI SMT Flat Wire High Current Inductor | 2 | 8.7 | – | 15.62 | 58 | 7030 | SMT | 3 | 9 | 14.2 | Superflux | |||
74477002 | SPEC | 8 files | WE-PD SMT Power Inductor | 2.4 | 13.5 | 15 | 9 | – | 1280 | Standard | – | – | – | – | |||
74477003 | SPEC | 8 files | WE-PD SMT Power Inductor | 3.5 | 12 | 12.5 | 11 | – | 1280 | Standard | – | – | – | – |
Samples |
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Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | IRP,40K (A) | ISAT (A) | RDC max. (mΩ) | fres (MHz) | Size | Version | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | Material | Samples |
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