Low noise, low-dropout regulator requires no capacitor

10 September 2002 Power Electronics / Power Management

Philips Semiconductors' CapFREE SA57000 is part of a series of low-noise, low-dropout regulators. While other devices may appear to be capacitor-free, most have restrictions on capacitive load and require a noise bypass capacitor. The SA57000 150 mA low-noise, low-dropout regulator with thermal protection requires no output capacitor, and is stable for all capacitive loads, regardless of ESR. It offers a low output noise voltage of 30 µV r.m.s., without noise bypass capacitor, as well as an ultra-low dropout voltage of 55 mV at 50 mA output current.

The SA57000 has an extremely low quiescent operating ground pin current, typically 85 µA, so it uses less power. The part also includes thermal overload and short circuit protection by way of a logic-controlled shutdown provided by a 'power on' pin. It shuts down if the temperature exceeds 144°C. A 'power OK' pin, which serves as a power status and thermal warning indicator, indicates a drop in nominal Vout of 6%, as well as flags when the chip temperature exceeds 127°C.

The device is offered in output voltages of 2,5, 2,8, 3,0, 3,3 V, and 3,6 V. Other voltages are available on request. Maximum line regulation is 0,1%/V and max load regulation 0,02%/mA. It comes in 5-lead SOT23 package.

For more information contact Mutronics (Value Added Distributor), 011 608 1460.

Further reading:

The importance of power integrity
Spectrum Concepts Power Electronics / Power Management
[Sponsored] Behind every high-speed system lies the need for power integrity. Without it, even the cleanest signal paths become compromised.

Read more...

---

Precise multi-vital sign monitoring
Future Electronics Power Electronics / Power Management
The AS7058 by ams OSRAM is an integrated multi-vital sign monitoring device, which provides a complete photoplethysmogram, electrocardiogram, body impedance sensor, and electrodermal activity sensor.

Read more...

---

Automotive battery diagnostics tester
Comtest Power Electronics / Power Management
Midtronics’ MVT handheld battery tester is a revolutionary tool, powered by MDX-AI, which is set to redefine the standards of battery diagnostics and testing in the automotive industry.

Read more...

---

Advanced 3-phase controllers
Future Electronics Power Electronics / Power Management
The STSPIN32G0 by STMicroelectronics is a family of highly integrated system-in-package providing solution suitable for driving three-phase brushless motors.

Read more...

---

Converting high voltages without a transformer
Altron Arrow Editor's Choice Power Electronics / Power Management
With appropriate power converter ICs, such as the LTC7897 from Analog Devices, many applications can be suitably powered without having to use complex and cost-intensive transformers.

Read more...

---

Reliable power for demanding applications
Conical Technologies Power Electronics / Power Management
The Mibbo Power MTR480 three-phase DIN-rail power supply is engineered to meet stringent industrial automation requirements, offering dependable performance in environments where downtime is not an option.

Read more...

---

Powering performance and precision
Future Electronics Power Electronics / Power Management
onsemi’s innovative T10 series MOSFETs, available in 40 V and 80 V versions, are designed for high-efficiency, fast-switching, and power-dense applications.

Read more...

---

Programmable flyback switcher ICs
Future Electronics Power Electronics / Power Management
Power Integrations has announced the release of the InnoSwitch5-Pro family of programmable flyback switcher ICs, which offer more than 95% efficiency in streamlined AC-DC converter designs.

Read more...

---

Multilayer chip beads with 8 A rating
RS South Africa Power Electronics / Power Management
TDK Corporation has expanded its MPZ1608-PH series of large-current multilayer chip beads for automotive and commercial power supply lines.

Read more...

---

The role of bidirectional charging in the evolving energy landscape
Avnet Silica Power Electronics / Power Management
As reliance on renewable sources like wind and solar continues to grow, the need for efficient energy flow and storage solutions has become more critical than ever.

Read more...

---