NCP4555, NCP4586
100 mA and 150 mA CMOS
LDOs with Shutdown and
Error Output
The NCP4555 and NCP4586 are high accuracy (typically
"0.5%)
CMOS upgrades for older (bipolar) low dropout regulators. Designed
specifically for battery鈥搊perated systems, the devices鈥?CMOS
construction eliminates wasted ground current, significantly
extending battery life. Total supply current is typically 50
碌A(chǔ)
at full
load (20 to 60 times lower than in bipolar regulators).
The devices鈥?key features include ultra low noise operation, very
low dropout voltage 鈥?typically 180 mV (NCP4555) and 270 mV
(NCP4586) at full load 鈥?and fast response to step changes in load. An
error output (ERROR) is asserted when the devices are
out鈥搊f鈥搑egulation (due to a low input voltage or excessive output
current). ERROR can be used as a low battery warning or as a
processor RESET signal (with the addition of an external RC
network). Supply current is reduced to 0.5
碌A(chǔ)
(max) and both V
OUT
and ERROR are disabled when the shutdown input is low. The devices
incorporate both over鈥搕emperature and over鈥揷urrent protection.
The NCP4555 and NCP4586 are stable with an output capacitor of
only 1.0
碌F
and have a maximum output current of 100 mA and
150 mA, respectively. For higher output current regulators, please see
the NCP4569 (I
OUT
= 300 mA) data sheet.
Features
http://onsemi.com
5
4
1
2
SOT鈥?3
SN SUFFIX
CASE 1212
3
PIN CONNECTIONS
V
IN
1
GND 2
SHDN 3
(Top View)
4 ERROR
5 V
OUT
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
鈥?/div>
Zero Ground Current for Longer Battery Life
鈥?/div>
Very Low Dropout Voltage
鈥?/div>
Guaranteed 100 mA and 150 mA Output
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
(NCP4555 and NCP4586 Respectively)
High Output Voltage Accuracy
Standard or Custom Output Voltages
Power鈥揝aving Shutdown Mode
ERROR Output Can Be Used as a Low Battery Detector, or
Processor Reset Generator
Over鈥揅urrent and Over鈥揟emperature Protection
Space鈥揝aving 5鈥揚(yáng)in SOT鈥?3A Package
Pin Compatible Upgrades for Bipolar Regulators
Battery鈥揙perated Systems
Portable Computers
Medical Instruments
Instrumentation
Cellular/GSMS/PHS Phones
Linear Post鈥揜egulators for SMPS
Pagers
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 11 of this data sheet.
Applications
漏
Semiconductor Components Industries, LLC, 2001
1
February, 2001 鈥?Rev. 0
Publication Order Number:
NCP4555/D
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