SA57005 Datasheet, PDF (2/12 Pages) NXP Semiconductors – Multiple output low noise, low dropout linear regulator

Philips Semiconductors
Multiple output low noise, low dropout linear regulator
Product data
SA57005
GENERAL DESCRIPTION
The SA57005 is a very low dropout, low noise composite voltage
regulator with three fixed independent outputs. The output voltages
are preset to 2.5 V, 2.8 V and 3.0 V having a common input voltage
pin V_IN. Two ON/OFF switches allow V_o1 and V_o2/V_o3 to be turned
off when not needed, thus conserving power. Also, three regulators
in one package save board space, which is critical in
microprocessor systems.
Designed for battery-powered and portable applications the
SA57005 achieves unequalled performance in all specifications
such as low supply-current, low dropout voltage, low power
consumption, small size, fast dynamic response to line and load,
precision output and so on. Each of these regulators consists of an
internal voltage reference, an error amplifier, resistors, and control
switch. The SA57005 is housed in a VSOP-8A 8-lead package.
FEATURES
• Very low dropout voltage: V_o1: 0.25 V typ.; V_o2: 0.28 V typ.;
V_o3: 0.30 V typ.
• Low noise: 60 µV_rms typ. (f = 10 Hz to 10 kHz; I_O = 30 mA)
• High precision output voltage: ±3%
• Output current capacity:
I_o1 and I_o2 = 100 mA max; I_o3 = 150 mA max.
• Low consumption current: I_IN1 = 250 µA typ.,
I_IN2/I_IN3 = 500 µA typ. (when not loaded), 3 µA max. (when off)
• Line regulation: 1%/V typ. (I_OUT = 30 mA; V_IN = 4.0 to 8.0 V)
• Load regulation: 30 mV typ. for I_OUT = 0 to 70 mA
• Low temperature drift co-efficient to V_OUT: ±100 ppm/°C
• Thermal shutdown
• Wide operating temperature range: –20 °C to +75 °C
APPLICATIONS
• Cellular phones, cordless phones and 2-way radios
• Electronic notebooks, PDAs and Palmtop computers
• Cameras, VCRs and camcorders
• Modems
• Battery-powered or hand-held instruments
SIMPLIFIED DEVICE DIAGRAM
1 PS1
GND ⁸
2 PS2/3
SA57005
3 NC
V_o1 ⁷
V_o2 ⁶
4 V_IN
V_o3 5
≥1 µF
1Ω
1Ω
1Ω
1 µF 1 µF 1 µF
Figure 1. Simplified device diagram.
SL01698
2002 Jun 20
2
853-2352 28505