www.fairchildsemi.com
FAN2558/FAN2559
180mA Low Voltage CMOS LDO
Features
• Fixed 1.0V, 1.2V, 1.3V, 1.5V, 1.8V, 2.5V, 3.3V, 3.5V, 3.6V,
3.8V and Adjustable Output
• Power Good Indicator with Open Drain Output
• 180mA Output Current
• 100µA Ground Current
• C
bypass
for Low Noise Operation
• Fast Enable for CDMA Applications
• High Ripple Rejection
• Current Limit
• Thermal Shutdown
• Excellent Line and Load Regulation
• Requires Only 1µF Output Capacitor
• Stable with 0 to 300m
Ω
ESR
• TTL-level Compatible Enable Input
• Active Output Discharge
General Description
The FAN2558/9 low voltage CMOS LDOs feature
fixed
or
adjustable output voltage, 180mA load current, delayed
power good output (open drain) and 1% output accuracy
with excellent line and load regulation. An external bypass
capacitor provides ultra-low noise operation.
The FAN2558/9 low voltage LDOs incorporate both thermal
shutdown and short circuit protection. Output is stable with a
1µF, low ESR capacitor. The FAN2558/9 family is available
in 5-Lead SOT-23, 6-Lead SOT-23 and 2x2mm MLP-6
packages.
FAN2558:
Fixed Output LDO with Power Good output
FAN2558ADJ:
Adjustable Output LDO with Power Good
output
FAN2559:
Fixed Output LDO with Power Good output,
Low Noise
Available standard output voltages are 1.0, 1.2V, 1.3V, 1.5V,
1.8V, 2.5V, 3.3V, 3.5V, 3.6V, and 3.8V. Custom output volt-
age options are also available.
Applications
•
•
•
•
Processor Power-up sequencing
PDAs, Cell Phones
Portable Electronic Equipment
PCMCIA Vcc and Vpp regulation/switching
Typical Application
47KΩ
R
PG
V
IN
47KΩ
R
PG
V
IN
C
OUT
47KΩ
R
PG
VOUT
R1
ADJ
R2
PG
C
OUT
VI
N
FB
SHDN
GND
V
OUT
FB
SHDN
GND
FB
SHDN
GND
V
OUT
C
OUT
CB
YP
C BYP
PG
CAP+
CAP-
EN
PG
CAP+
CAP-
EN
CAP+
CAP-
EN
FAN2558
FAN2558ADJ
FAN2559
REV. 1.0.4 3/15/04
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
