Preliminary
RT9004
300mA, Low Noise, Ultra-Fast CMOS Triple LDOs Regulator
General Description
Features
z Short Circuit Thermal Folded Back Protection
The RT9004 is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9004 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 RT9004 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices. The
RT9004 consumes less than 0.01uA in shutdown mode
and has fast turn-on time less than 50us. RT9004 is short
circuit thermal folded back protected. RT9004 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 VDFN-10L
3x3 and WDFN-10L 3x3 packages, the RT9004 also offers
custom voltage, range of 1.5V to 3.5V with 0.1V per step.
z Low-Noise for RF Application
z Fast Response in Line/Load Transient
z Quick Start-Up (Typically 50us)
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 Thermal Shutdown Protection
z Only 1uF Output Capacitor Required for Stability
z High Power Supply Rejection Ratio
z Custom Voltage Available
z Small 10-Lead VDFN and WDFN Packages
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
z PCMCIA Cards
RT9004
Package Type
z Portable InformationAppliances
QV : VDFN-10L 3x3 (V-Type)
QW : WDFN-10L 3x3 (W-Type)
Pin Configurations
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
(TOP VIEW)
1
2
3
4
5
10
9
Voltage Version : VOUT1/VOUT2/VOUT3
A : 2.8V/2.5V/1.8V
B : 3.0V/2.5V/1.8V
C : 2.8V/2.8V/1.8V
D : 2.8V/1.8V/1.8V
VOUT1
VOUT2
GND
VIN1
EN1
VIN2
EN2
VIN3
GND
8
7
9
VOUT3
EN3
11
E : 3.3V/2.8V/1.8V
F : 3.3V/2.8V/2.8V
V/WDFN-10L 3x3
G : 2.5V/2.8V/2.5V
H : 2.8V/2.8V/1.5V
J : 1.5V/3.3V/3.3V
Marking Information
K : 3.0V/3.0V/1.8V
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
Note :
Richtek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
DS9004-00 February 2008
www.richtek.com
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