AS1357V-T

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The AS1357V-T is a triple low-dropout (LDO) voltage regulator in a 16-pin QFN 3x3 package. It provides three independent outputs with a supply range of 3 to 5.5V and an output voltage range of 1.8 to 3.3V in 0.1V steps. Each regulator delivers up to 200mA with ±1.5% accuracy. Key electrical parameters include 70dB PSRR at 1kHz, 40µV rms noise, and 0.2V dropout at full load. The device features one-time programmable (OTP) settings, shutdown current ≤1µA, and operates from -40°C to +85°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrates three independent LDOs with user-programmable output voltages via OTP technology
• Ensures stability with low ESR ceramic capacitors ranging from 1µF to 4.7µF
• Provides low-noise performance suitable for direct connection to sensitive circuits
• Includes comprehensive protection mechanisms such as thermal shutdown and over-current limiting

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Mobile phones and PDAs
• MP3 players and handheld computers
• Digital cameras and portable media devices

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix to confirm the package type and delivery format. The 'V' suffix indicates the 16-pin QFN 3x3 package, while '-T' denotes tape and reel packaging. Ensure compatibility with the required output voltage configuration, as factory-trimmed versions may differ from user-programmable units. Confirm availability through authorized distributors as stock levels vary.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when designing battery-powered mobile systems requiring multiple regulated rails from a single source. The OTP feature allows design flexibility during prototyping without committing to fixed voltages early. Consider the 16-pin QFN 3x3 package for space-constrained layouts. Verify that the external capacitor selection meets the low ESR requirements for stability across the operating temperature range.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the AS1357 series of programmable triple LDO regulators manufactured by austriamicrosystems (now ams OSRAM). The series offers high-performance power management solutions optimized for mobile applications. The AS1357V-T specifically utilizes the smaller 16-pin QFN 3x3 footprint compared to the 12-pin variant, providing a compact solution for dense PCB designs.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include other AS1357 variants with different packages or delivery forms, such as the AS1357 (12-pin tray) or AS1357V (16-pin tray). Fixed-voltage versions like AS1357_A7A-T are available if programming is not required. Cross-referencing pinouts and electrical characteristics is essential when considering alternatives from other manufacturers.