RT9011
Portable Power Management 300mA Dual LDO Regulator
General Description Features
z Wide Operating Voltage Ranges : 2.5V to 5.5V
The RT9011 is a dual channel, low noise, and low dropout
z Low-Noise for RF Application
regulator sourcing up to 300mA at each channel. The range
z No Noise Bypass Capacitor Required
of output voltage is from 1.2V to 3.6V by operating from
z Fast Response in Line/Load Transient
2.5V to 5.5V input.
z TTL-Logic-Controlled Shutdown Input
The RT9011 offers 2% accuracy, extremely low dropout
z Low Temperature Coefficient
voltage (240mV @ 300mA), and extremely low ground
zz z zz Dual LDO Outputs (300mA/300mA)
current, only 27A per LDO. The shutdown current is near
zz z zz Ultra-low Quiescent Current 27A/LDO
zero current which is suitable for battery-power devices.
zz z zz High Output Accuracy 2%
Other features include current limiting, over temperature,
zz z zz Short Circuit Protection
output short circuit protection.
zz z zz Thermal Shutdown Protection
The RT9011 is short circuit thermal folded back protected.
zz z zz Current Limit Protection
The IC lowers its OTP trip point from 165C to 110C when
zz z zz Short Circuit Thermal Folded Back Protection
output short circuit occurs (VOUT < 0.4V) providing
zz z zz Tiny TSOT-23-6 and 6-Lead/8-Lead/10-Lead WDFN
maximum safety to end users.
Packages
zz z zz RoHS Compliant and 100% Lead (Pb)-Free
The RT9011 can operate stably with very small ceramic
output capacitors, reducing required board space and
Applications
component cost. The RT9011 is available in fixed output
zz z zz CDMA/GSM Cellular Handsets
voltages in the TSOT-23-6, WDFN-8L 2x2, WDFN-10L 3x3,
zz z zz Battery-Powered Equipment
WDFN-8L 3x3 and WDFN-6L 1.6x1.6 packages.
zz z zz Laptop, Palmtops, Notebook Computers
zz z zz Hand-Held Instruments
Ordering Information
zz z zz PCMCIA Cards
RT9011-
zz z zz Portable Information Appliances
Package Type
J6 : TSOT-23-6
Marking Information
QW : WDFN-8L 2x2 (W-Type)
QWA : WDFN-10L 3x3 (W-Type)
For marking information, contact our sales representative
QWB : WDFN-8L 3x3 (W-Type)
directly or through a Richtek distributor located in your
QWC : WDFN-6L 1.6x1.6 (W-Type)
area.
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Available Voltage Version
Output Voltage : VOUT1/VOUT2
Code Voltage Code Voltage Code Voltage
VOUT2 > VOUT1 is Recommended
Note :
A 3.5 B 1.3 C 1.2
Richtek products are :
D 1.85 E 2.1 F 1.5
` RoHS compliant and compatible with the current require-
G 1.8 H 2 J 2.5
ments of IPC/JEDEC J-STD-020.
K 2.6 L 2.7 M 2.8
` Suitable for use in SnPb or Pb-free soldering processes. N 2.85 P 3 Q 3.1
R 3.2 S 3.3 T 2.65
V 2.9 W 1.6 X 3.15
Y 1.9
DS9011-08 April 2011 www.richtek.com
1RT9011
Pin Configurations
(TOP VIEW)
VOUT1 VIN EN1
VIN 1 8 VIN 1 10 VIN 1 8
VOUT1 VOUT1 VOUT1
6 5 4 1 6
VOUT1
VIN
9
EN1 2 VOUT2
2 7 2 7
EN1 VOUT2 EN1 NC
2 5
GND GND EN1 GND VOUT2
3 GND 8 NC
EN2
6 6
EN2 3 NC EN2 3 GND
7
4 7 NC
NC 3 4
EN2 GND
23
9 11 9
NC 4 5 GND 5 GND NC 4 5 VOUT2
NC
VOUT2 GND EN2
TSOT-23-6 WDFN-8L 2x2 WDFN-10L 3x3 WDFN-8L 3x3 WDFN-6L 1.6x1.6
Typical Application Circuit
V
VIN
IN
C
IN VOUT1 V
OUT1
C
1uF
OUT1
RT9011 1uF
EN1
Chip Enable
VOUT2 V
OUT2
C
OUT2
EN2
1uF
GND
Functional Pin Description
Pin No.
Pin Name Pin Function
WDFN-8L WDFN-10L WDFN-8L WDFN-6L
TSOT-23-6
2x2 3x3 3x3 1.6x1.6
5 1 1 1 1 VIN Supply Input.
4 2 2 2 2 EN1 Chip Enable1 (Active High).
3 3 3 3 3 EN2 Chip Enable2 (Active High).
5, 6, 6, 4, Common Ground. The exposed pad must be
2 Exposed Exposed Exposed Exposed GND soldered to a large PCB and connected to
Pad (9) Pad (11) Pad (9) Pad (7) GND for maximum power dissipation.
1 7 9 5 5 VOUT2 Channel 2 Output Voltage.
6 8 10 8 6 VOUT1 Channel 1 Output Voltage.
-- 4, 6 4, 5, 7, 8 4, 7 -- NC No Internal Connection.
www.richtek.com DS9011-08 April 2011
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