LR9198_15 Datasheet, PDF (1/12 Pages) Leshan Radio Company – Ultra-low Noise for RF Application

300mA Ultra-low Noise, Ultra-Fast
CMOS LDO Regulator
LESHAN RADIO COMPANY, LTD.
LR9198
FEATURES
Ultra-low Noise for RF Application
Ultra-Fast Response in Line/Load
Transient
<0.01µA Standby Current When
Shutdown.
Low Dropout:210mV@300mA
Wide Operating Voltage Ranges:2V to
6V
TTL-logic-Controlled Shutdown Input
Low Temperature Coefficient
Current Limiting Protection
Thermal Shutdown Protection
Only 1µF Output Capacitor Required for
Stability
High Power Supply Rejection Ratio
Custom Voltage Available
Fast output discharge
Available in 5-Lead SOT-23 and SC-70
Package
APPLICATIONS
Cellular and Smart Phones
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
MP3/MP4/MP5 Players
Portable Information Appliances
DESCRIPTION
The LR9198 is designed for portable RF and
wireless applications with demanding perfor-
mance and space requirements. The LR9198
performance is optimized for battery-powered
systems to deliver ultra low noise and low
quiescent current. Regulator ground current
increases only slightly in dropout, further
prolonging the battery life. The LR9198 also
works with low-ESR ceramic capacitors,
reducing the amount of board space
necessary for power applications, critical in
hand-held wireless devices. The LR9198
consumes less than 0.01µA in shutdown
mode and has fast turn-on time less than
50µs. The other features include ultra low
dropout voltage, high output accuracy,
current limiting protection, and high ripple
rejection ratio. Available in the 5-lead SC-70
and SOT-23 packages.
ORDERING INFORMATION
LR9198 XX X X X XXX
TYPICAL APPLICATION
LR9198 28 AA
Package:
RN: SOT-23-5
URN: SC-70-5
Features
P: Standard (default, lead free)
VIN
CIN
1 _VIN
VOUT ⁵
LR9198
2 _GND
VOUT
COUT
C: Customized
Enable Option:
Chip Enable
3 _EN
NC ⁴
A: active high with internal 8 MΩ pull down
B: active low with internal 8 MΩ pull up
Output Voltage Accuracy
A: ±1%
B: ±2%
Application hints:
Output capacitor (COUT≥2.2uF) is
recommended in LR9198-1.2V application to
Output Voltage:
12: 1.2V 15: 1.5V 18:1.8V 25:2.5V
assure the stability of circuit.
28: 2.8V 30: 3.0V 33:3.3V 50:5.0V
CT: custom fixed output (50mV step)
1