SA57000-XX Datasheet, PDF (2/8 Pages) NXP Semiconductors – CapFREEE 150 mA, low-noise, low dropout regulator with thermal protection

Philips Semiconductors
CapFREE™ 150 mA, low-noise, low dropout regulator
with thermal protection
Product data
SA57000-XX
GENERAL DESCRIPTION
The CapFREE™ SA57000 is the first in a new family of unique low
dropout regulators. It needs no external capacitors, offers a low
output noise voltage of 30 µV_RMS, and an ultra-low dropout voltage
of 55 mV @ 50 mA output current. To accommodate high density
layouts, it is packaged in the small footprint 5 leaded SOT23-5 (SO5).
It is ideal for all portable and cellular phone applications.
Additional features include power and thermal shutdown, output
current limitation, power OK status, thermal warning, and external
logic-controlled on-off via the PWRON pin.
FEATURES
• CapFREE: No output capacitor needed, stable for all capacitive
loads, regardless of ESR
• Low 30 µV_RMS noise without noise bypass capacitor
• Preset output voltages to 2.5 V, 2.8 V, 3.0 V, 3.3 V and 3.6 V;
other voltages available upon request. 2% output voltage
accuracy
• 150 mA maximum output current with current limitation
• Typical dropout voltage 55 mV @ 50 mA output current
• 85 µA typical ground current
• Thermal-overload and short-circuit protection
• PWROK pin: both power status and thermal warning indicator
• PWRON pin offers logic-controlled shutdown
• Maximum line regulation: 0.1%/V
• Maximum load regulation: 0.02%/mA.
APPLICATIONS
• Cordless and mobile phones
• Industrial and medical equipment
• Other battery-powered equipment.
SIMPLIFIED SYSTEM DIAGRAM
PWRON 3
PWRON
TEMPERATURE
SENSOR
SA57000
PWRON
OVER 144 °C (POWER/THERMAL SHUTDOWN)
OVER 127 °C (POWER/THERMAL WARNING)
LOGIC
CONTROL
4 PWROK
GND 2
V_IN 1
PWRON
BAND
GAP
LOW-PASS
FILTER
OUTPUT
AMP.
5 VOUT
PWRON
BIAS
NETWORK
Figure 1. Simplified system diagram.
SA00557
CapFREE is a trademark of Philips Electronics North America Corporation.
2001 Aug 27
2
853–2265 26991