Contents
What is the dropout voltage of a LDO regulator?
The dropout voltage of the TPS76733 is typically 350 mV at 1 A. Thus, the LDO regulator begins dropping out at 3.65-V input voltage; the range of the dropout region is between approximately 2-V and 3.65V input voltage. Below this, the device is nonfunctional.
How does ground current affect the LDO efficiency?
Ground current (I GND) is the difference between the input and output currents, and necessarily includes the quiescent current. A low ground current maximizes the LDO efficiency. Figure 4 shows the ground current variation vs. load current for the ADP160 LDO.
What are the sources of output noise in a LDO?
Output Noise Voltage. The major sources of output noise in LDOs are the internal reference voltage and the error amplifier. Modern LDOs operate with internal bias currents of just a few tens of nanoamps in order to achieve quiescent currents of 15 μA or less. These low bias currents require the use of bias resistors of up to a GΩ.
How is the quiescent current of an adp160 LDO determined?
The amount of quiescent current is determined by the topology, input voltage, and temperature. The quiescent current of the ADP160 LDO is nearly constant as the input voltage varies between 2 V and 5.5 V, as shown in Figure 3. Figure 3. Quiescent current vs. input voltage of the ADP160 LDO.
The input supply range is 1.9V to 5.5V with a dropout voltage of 100 mV, in shutdown the quiescent current is as low as 1µA. Compatible with a 1 µF ceramic output capacitor, and available in packages as small as 1.2 x 1.3 mm, the devices allow to optimize the space cost and power consumption of your applications.
Which is the best LDO regulator for FPGAs?
New LDOs with… ST offers a wide range of low and medium power LDO regulators featuring ultra-low dropout and fast transient response characteristics. The ultra-low dropout series of LDOs simplifies the design of high-efficiency, cost-effective linear power management (from 50 mA to 3 A of continuous load current), ideal for DSPs, MCUs and FPGAs.
Who are the manufacturers of low dropout regulators?
Low Dropout Regulators ( LDO Regulators) are available at Mouser Electronics from industry leading manufacturers. Mouser is an authorized distributor for many Low Dropout Regulator (LDO Regulator) manufacturers including Analog Devices, Diodes Inc., Maxim Integrated, Microchip, ON Semi, STMicroelectronics, Texas Instruments, & more.
What is the input voltage of the ldo40l?
Able to start up with an input voltage of just 3.5V and operates with up to 38V, the LDO40L ensures correct regulation in applications with wide variations of the power rail (i.e. cold-crank in automotive, unregulated DC rails in industrial applications).