SA57031-XX Datasheet, PDF (2/13 Pages) NXP Semiconductors – Micropower 150 mA, low-noise, low dropout linear regulator with on/off

Philips Semiconductors
Micropower 150 mA, low-noise, low dropout linear
regulator with on/off
Product data
SA57031-XX
GENERAL DESCRIPTION
The SA57031 is a 150 mA, fixed output voltage regulator designed
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.
The 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.
The SA57031 is housed in a WL-CSP4 package (see dimensional
drawing for layout).
FEATURES
• Many Preset Output Voltages: 1.8 to 5.0 V in 0.1 V increments
• Wafer-level chip scale package (WL-CSP4)
• Extremely low PSRR: 80 dB typical at 1 kHz
• Low Dropout Voltage: 100 mV (typ) @ 50 mA output current
• Very Low Consumption Current: 100 mA typ. (when not loaded),
0.1 mA max. (when off)
• High precision Output Voltage: ±2%
• Output Current Capacity: 150 mA (typ)
• Low Noise: 30mVrms @ 10 Hz to 100 kHz
• Good Line Regulation: 0.01%/V typ.
• Good Load Regulation: 0.003%/mA typ.
Bottom View
• Low Temperature Drift Co-efficient to V_O: ±100 ppm/°C
• Built-in Current Limiter
• Wide Operating Temperature Range: –40 to +85 °C
APPLICATIONS
• Cellular Phones, Cordless Phones and 2-way Radios
• Electronic Notebooks, PDAs and Palmtop Computers
• Cameras, VCRs and Camcorders
• PCMCIA Cards
• Modems
• Battery-powered or Hand-held Instruments
SIMPLIFIED SYSTEM DIAGRAM (BOTTOM VIEW)
ON
OFF
GND
A2
B2
SA57031-XX
A1
B1
V_I
C_I
2.2 µF
V_O
+ DC
– 2.0 V TO 6.0 V
R_LOAD
V Preset output voltages:
C_O
1.8 V to 5.0 V
(in 100 mV increments)
SL02001
Figure 1. Simplified system diagram.
2003 Jun 23
2
853-2361 28634