Preliminary
RT9011
Portable Power Management 300mA Dual LDO Regulator
General Description
The RT9011 is a dual channel, low noise, and low dropout
regulator sourcing up to 300mA at each channel. The range
of output voltage is from 1.2V to 3.6V by operating from
2.5V to 5.5V input.
RT9011 offers 2% accuracy, extremely low dropout voltage
(240mV @ 300mA), and extremely low ground current,
only 27μA per LDO. The shutdown current is near zero
current which is suitable for battery-power devices. Other
features include current limiting, over temperature, output
short circuit protection.
RT9011 is short circuit thermal folded back protected.
RT9011 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.
RT9011 can operate stably with very small ceramic output
capacitors, reducing required board space and component
cost. RT9011 is available in fixed output voltages in the
TSOT-23-6 and
WDFN-8L
2x2 package.
Features
Wide Operating Voltage Ranges : 2.5V to 5.5V
Low-Noise for RF Application
No Noise Bypass Capacitor Required
Fast Response in Line/Load Transient
TTL-Logic-Controlled Shutdown Input
Low Temperature Coefficient
Dual LDO Outputs (300mA/300mA)
Ultra-low Quiescent Current 27μA/LDO
μ
High Output Accuracy 2%
Short Circuit Protection
Thermal Shutdown Protection
Current Limit Protection
Short Circuit Thermal Folded Back Protection
Tiny TSOT-23-6 and 8-Lead WDFN Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
CDMA/GSM Cellular Handsets
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
Portable Information Appliances
Ordering Information
RT9011-
Package Type
J6 : TSOT-23-6
QW : WDFN-8L 2x2 (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage : VOUT1/VOUT2
CM : 1.20V/2.80V, FM : 1.50V/2.80V
GK : 1.80V/2.60V, GS : 1.80V/3.30V
JG : 2.50V/1.80V, JM : 2.50V/2.80V
JP : 2.50V/3.00V, JS : 2.50V/3.30V
JN : 2.50V/2.85V, MG : 2.80V/1.80V
MM : 2.80V/2.80V, NN : 2.85V/2.85V
MS : 2.80V/ 3.30V, PG : 3.00V/1.80V
MP : 2.80V/3.00V, PP : 3.00V/3.00V
SS : 3.30V/3.30V, SQ : 3.30V/3.10V
BM : 1.30V/2.80V
Pin Configurations
(TOP VIEW)
VOUT1 VIN
6
1
5
2
EN1
4
3
VIN
1
EN1
2
EN2
3
NC
4
8
9
7
6
5
VOUT1
VOUT2
NC
GND
VOUT2 GND EN2
TSOT-23-6
WDFN-8L 2x2
Note
: There is no pin1 indicator on top mark for TSOT-23-6
type, and pin 1 will be lower left pin when reading top mark
from left to right.
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.
DS9011-05 August 2007
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
www.richtek.com
1
GND
RT9011
Absolute Maximum Ratings
Preliminary
(Note 1)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 6V
Other I/O Pin Voltages ---------------------------------------------------------------------------------------------------
6V
Power Dissipation, P
D
@ T
A
= 25°C
TSOT23-6 ------------------------------------------------------------------------------------------------------------------- 0.455W
WDFN-6L
2x2 -------------------------------------------------------------------------------------------------------------- 0.606W
Package Thermal Resistance (Note 4)
TSOT23-6,
θ
JA
-------------------------------------------------------------------------------------------------------------- 220°C/W
WDFN-6L
2x2,
θ
JA
--------------------------------------------------------------------------------------------------------- 165°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Storage Temperature Range --------------------------------------------------------------------------------------------
−65°C
to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions
(Note 3)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.5V to 5.5V
Enable Input Voltage ------------------------------------------------------------------------------------------------------ 0V to 5.5V
Junction Temperature Range --------------------------------------------------------------------------------------------
−
40°C to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------------
−
40°C to 85°C
(V
IN
= V
OUT
+ 1V, V
EN
= V
IN
, C
IN
= C
OUT
= 1μF, T
A
= 25°C, unless otherwise specified.)
Electrical Characteristics
Parameter
Input Voltage
Dropout Voltage
(Note 5)
Output voltage range
V
OUT
Accuracy
Line Regulation
Load Regulation
Current Limit
Quiescent Current
Shutdown Current
EN Threshold
Output Voltage TC
Thermal Shutdown
Thermal Shutdown Hysteresis
I
Q
Symbol
V
IN
V
DROP
V
OUT
ΔV
ΔV
LINE
Test Conditions
V
IN
= 2.5V to 5.5V
I
OUT
= 300mA
I
OUT
= 1mA
V
IN
= (V
OUT
+ 0.3V) to 5.5V or
V
IN
> 2.5V, whichever is larger
R
LOAD
= 1Ω
V
EN
> 1.5V
V
EN
< 0.4V
V
IN
= 2.5V to 5.5V, Power On
V
IN
= 2.5V to 5.5V, Shutdown
Min
2.5
--
1.2
-2
--
--
330
--
--
1.5
--
--
--
--
Typ
--
240
--
--
--
--
450
58
--
--
--
100
170
40
Max
5.5
330
3.6
+2
0.2
0.6
700
80
1
--
0.4
--
--
--
Units
V
mV
V
%
%/V
%
mA
μA
μA
V
ppm/°C
°C
°C
ΔV
LOAD
1mA < I
OUT
< 300mA
I
Q_SD
V
IH
V
IL
T
SD
ΔT
SD
To be continued
www.richtek.com
4
DS9011-05 August 2007
Preliminary
Parameter
PSRR
I
LOAD
= 10mA
Symbol
PSRR
Test Conditions
f =100Hz
f =1kHz
f =10kHz
PSRR
I
LOAD
= 150mA
f =100Hz
PSRR
f =1kHz
f =10kHz
Min
--
--
--
--
--
--
Typ
65
60
50
65
50
50
RT9011
Max
--
--
--
--
--
--
Units
dB
dB
dB
dB
dB
dB
Note 1.
Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2.
Devices are ESD sensitive. Handling precaution recommended.
Note 3.
The device is not guaranteed to function outside its operating conditions.
Note 4.
θ
JA
is measured in the natural convection at T
A
= 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
Note 5.
The dropout voltage is defined as V
IN
-V
OUT
, which is measured when V
OUT
is V
OUT(NORMAL)
−
100mV.
DS9011-05 August 2007
www.richtek.com
5
PCB设计
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