Vishay introduces a 150ma low noise, low drop regulator

The SiP21106 BiCMOS 150 mA Low Noise LDO voltage regulator is perfect for low battery powered low power applications. Ultra-low ground current at 150 mA load and low voltage at 135 mV help extend battery life in portable electronics. Systems requiring a quiet voltage source, such as RF applications, will benefit from SiP21106's low output noise.

SiP21107 does not require a noise bypass capacitor and provides an error flag pin (POK or Power OK). The POK output requires an external pull-up resistor, which becomes low when the supply does not reach the voltage. The output of SiP21108 is adjusted through an external resistor network. SiP21106, SiP21107, SiP21108 Voltage regulators allow very small ceramic output capacitors to operate stably, reducing board space and component costs.

SiP21106, SiP21107, and SiP21108 are packaged in TSOT23-5L ultra-thin lead-free (Pb) TSC75-6L and SC70-5L to operate in the industrial operating range (-40 °C to 85°C). They are designed to maintain regulation while providing 330 mA peak current on. An active pull-down circuit improves output transient response and regulation during startup. In shutdown mode, the output by 100Ω NMOS automatic discharge to the ground.

Typical application circuit

Pin arrangement

Time wave pattern

Features

• SC70-5L (2.1mm x 2.1mm x 0.95mm)

• TSOT23-5L (3.05 mm x 2.85 mm x 1.0 mm)

• TSC75-6L package (1.6mm x 1.6mm x 0.55mm), TSOT23-5L and SC70-5L Package Options

• 1.0% output voltage accuracy at 25 °C

• Low dropout voltage: 135 mV at 150 mA

• SiP21106 low noise: 60 µV(rms) (10 Hz to 100 kHz bandwidth) with 10 nF over full load range

• 35 µA (typical) ground current at 1 mA load

• 1 µA maximum shutdown current at 85 °C

• Output auto discharge at shutdown mode

• Build-in short circuit (330 mA typical) and thermal protection (160 °C typical)

• SiP21108 adjustable output voltage

• SiP21107 POK Error Flag

• Junction temperature range for -40 °C to + 125 °C operation

• Uses low ESR ceramic capacitors

• Fixed voltage output 1.2V to 5 V in 50 mV steps

• Compliant to RoHS Directive 2002/95/EC

Applications

• Cellular phones, wireless handsets

• PDAs

• MP3 players

• Digital cameras

• Pagers

• Wireless modem

• Noise-sensitive electronic systems