Preliminary
RT9016
500mA Peak, Thermal Folded Back CMOS LDO Regulator
General Description
Features
z Short Circuit Thermal Folded Back Protection
z Ultra-Low-Noise for RF Application
z Ultra-Fast Response in Line/Load Transient
z Quick Start-Up (Typically 50μs)
z 0.01μA Standby Current When Shutdown
z Low Dropout : 380mV @ 500mA
The RT9016 is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9016 performance is optimized for
battery-powered systems to deliver ultra low noise and
low quiescent current. A noise bypass pin is available for
further reduction of output noise. Regulator ground current
increases only slightly in dropout, further prolonging the
battery life. The RT9016 also works with low-ESR ceramic
capacitors, reducing the amount of board space necessary
for power applications, critical in hand-held wireless
devices. The RT9016 consumes less than 0.01μA in
shutdown mode and has fast turn-on time less than 50μs.
RT9016 is short circuit thermal folded back protected.
RT9016 lowers its OTP trip point from 165°C to 110°C
when output short circuit occurs (VOUT < 0.4V) providing
maximum safety to end users. The other features include
ultra low dropout voltage, high output accuracy, current
limiting protection, and high ripple rejection ratio. Available
in the SOT-23-5 and WDFN-6L 2x2 packages.
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 1μF Output Capacitor Required for Stability
z High Power Supply Rejection Ratio
z Custom Voltage Available
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z CDMA/GSM Cellular Handsets
z Battery-Powered Equipment
z Laptop, Palmtops, Notebook Computers
z Hand-Held Instruments
Ordering Information
RT9016-
z PCMCIA Cards
Package Type
B : SOT-23-5
z Portable InformationAppliances
QW : WDFN-6L 2x2 (W-Type)
Marking Information
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
Output Voltage
15 : 1.5V
16 : 1.6V
:
34 : 3.4V
35 : 3.5V
1H : 1.85V
2H : 2.85V
Pin Configurations
(TOP VIEW)
1
2
3
5
VOUT
VIN
GND
EN
Note :
1
2
3
6
5
4
EN
GND
VIN
BP
NC
VOUT
Richtek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
7
BP
4
SOT-23-5
WDFN-6L 2x2
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
DS9016-03 August 2007
www.richtek.com
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