RT9198T Datasheet, PDF (1/12 Pages) Richtek Technology Corporation – 300mA, Thermal Folded Back CMOS LDO Regulator

RT9198T
300mA, Thermal Folded Back CMOS LDO Regulator
General Description
Features
The RT9198T is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9198T 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 RT9198T also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices. The
RT9198T consumes less than 0.01uA in shutdown mode
and has fast turn-on time less than 50μs. RT9198T is short
circuit thermal folded back protected. RT9198T lowers its
OTP trip point from 165°C to 110°C when output short
circuit occurs (V_OUT < 0.4V) providing maximum safety to
end users. The other features include ultra low dropout
z Short Circuit Thermal Folded Back Protection
z Low-Noise for RF Application
z Fast Response in Line/Load Transient
z Quick Start-Up (Typically 50us)
z < 0.01uA Standby Current When Shutdown
z Low Dropout : 220mV @ 300mA
z Wide Operating Voltage Ranges : 2.5V to 5.5V
z TTL-Logic-Controlled Shutdown Input
z Low Temperature Coefficient
z Current Limiting Protection
z Thermal Shutdown Protection
z Only 1uF Output Capacitor Required for Stability
z High Power Supply Rejection Ratio
z Custom Voltage Available
z RoHS Compliant and 100% Lead (Pb)-Free
voltage, high output accuracy, current limiting protection,
and high ripple rejection ratio. Available in the SOT-23-3,
SOT-23-5 and SC-70-5 packages, the RT9198T also offers
a range of 1.5V to 3.5V with 0.1V per step.
Applications
z CDMA/GSM Cellular Handsets
z Battery-Powered Equipment
z Laptop, Palmtops, Notebook Computers
Ordering Information
RT9198T-
z Hand-Held Instruments
z PCMCIA Cards
Package Type
U5 : SC-70-5
U5R : SC-70-5 (R-Type)
V : SOT-23-3
B : SOT- 23-5
BR : SOT- 23-5 (R-Type)
z Portable Information Appliances
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
Lead Plating System
area.
P : Pb Free
G : Green (Halogen Free and Pb Free) _{Pin Configurations}
Note :
Output Voltage
15 : 1.5V
16 : 1.6V
:
34 : 3.4V
35 : 3.5V
1H : 1.85V
2H : 2.85V
(TOP VIEW)
VIN
3
GND
2
VOUT
Richtek products are :
` RoHS compliant and compatible with the current require-
SOT-23-3
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
DS9198T-04 April 2011
www.richtek.com
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