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:

3-terminal filters for automotive applications
RS South Africa Power Electronics / Power Management
TDK has expanded its YFF series of 3-terminal filters for automotive applications to include higher voltages up to 35 V and higher capacitances up to 4,7 µF.

Read more...

---

Simple battery charger ICs for any chemistry
Altron Arrow Editor's Choice Power Electronics / Power Management
The LTC4162 is a highly integrated, high voltage multi-chemistry synchronous monolithic step-down battery charger and PowerPath manager with onboard telemetry functions and optional maximum power point tracking.

Read more...

---

Why your PoE budget could make or break your next installation
Power Electronics / Power Management
In South Africa’s often unpredictable networking environments, understanding and planning your PoE budget is essential for system reliability, customer satisfaction, and long-term scalability.

Read more...

---

Five-minute EV charging a reality
Power Electronics / Power Management
Successfully demonstrated in Beijing recently at the Shanghai auto show, BYD claimed to add 400 km of range in just five minutes of charging.

Read more...

---

The evolution of power management in electronics
TRX Electronics Power Electronics / Power Management
The Mibbo MPS Series metal-encased power supplies deliver solid, efficient power in a durable package that’s built to last.

Read more...

---

Power and precision in a compact package
Conical Technologies Power Electronics / Power Management
The Mibbo MPS Series metal-encased power supplies deliver solid, efficient power in a durable package that’s built to last.

Read more...

---

Robust PoE module
CST Electronics Power Electronics / Power Management
The Ag59800-LPB high power, IEEE 802.3bt compliant, PD module from Silvertel offers typical efficiency of 95% making it an ideal choice for higher power, space-constrained applications.

Read more...

---

Cutting-edge solutions for Africa’s clean energy future
Power Electronics / Power Management
As Africa pushes towards reliable, affordable, and sustainable energy, Sungrow is driving transformation with cutting-edge innovations that enhance grid stability, reduce energy costs, and expand access to clean power.

Read more...

---

Transformer protection is a critical safeguard for municipal power stability
Power Electronics / Power Management
Transformer protection is not just a technical requirement; it is a vital component in ensuring the resilience and operational integrity of South Africa’s municipal power infrastructure.

Read more...

---

Reliable power solution
Conical Technologies Power Electronics / Power Management
The Mibbo MLD-120W-xxVx is a robust DIN-rail mounted DC-DC converter with a 120 W output capacity specifically designed for industrial and automation applications.

Read more...

---