SA57031 is a 150 mA, fixed output voltage regulator designed by Philips Semiconductors to provide very low dropout voltage and low noise in battery powered and portable applications. The output voltage is preset to voltages between 1.8 to 5.0 Volts, in 100 mV increments. SA57031 achieves excellent performance in all specifications such as excellent power supply ripple rejection at low frequency, low supply-current, low dropout voltage, low power consumption, extremely small size with chip scaled package (CSP), extremely low output noise voltage, very fast start-up response time, precision output, fast dynamic response to line and load regulation, etc. This regulator consists of an internal voltage reference, and current limit. SA57031 is housed in a WL-CSP4 package (see dimensional drawing for layout).
The SA57031‑XX is a 150 mA fixed‑output linear regulator designed for battery‑powered and portable applications. It provides very low dropout voltage, low output noise, and excellent power‑supply ripple rejection. Output voltages are preset from 1.8 V to 5.0 V in 0.1 V steps, and the device includes an on/off control pin.
The regulator is supplied in a wafer‑level chip‑scale package (WL‑CSP4) with four bumps. Maximum ratings include a supply voltage range of 2.0 V to 60 V, operating temperature from –40 °C to +85 °C, and a typical power dissipation of 190 mW. Typical applications are cellular phones, PDAs, cameras, PCMCIA cards, modems, and hand‑held instruments.
| Output Current Capacity | 150 mA (typ) |
|---|---|
| Low Dropout Voltage | 100 mV (typ) @ 50 mA |
| Output Noise | 30 mVrms @ 10 Hz‑100 kHz |
| Operating Temperature Range | –40 °C to +85 °C |
| Supply Voltage Range | 2.0 V to 60 V |
| Package Type | WL‑CSP4 wafer‑level chip‑scale package (4 bumps) |
The typical dropout voltage is 100 mV at a 50 mA output current.
Preset output voltages range from 1.8 V to 5.0 V in 0.1 V increments.
It is offered in a wafer‑level chip‑scale package (WL‑CSP4) with four bumps.
The ON/OFF pin is a control pin; connect it to the supply voltage if not used.