®
RT9030A
300mA, Low Input Voltage, Low Dropout, Low Noise Ultra-
Fast Without Bypass Capacitor CMOS LDO Regulator
General Description
The RT9030A is a high-performance, 300mA LDO regulator,
offering extremely high PSRR and ultra-low dropout. Ideal
for portable RF and wireless applications with demanding
performance and space requirements.
The RT9030A quiescent current as low as 25μA further
prolongs the battery life. The RT9030A also works with
low ESR ceramic capacitors, reducing the amount of board
space necessary for power applications, critical in hand-
held wireless devices.
The RT9030A consumes typical 0.7μA in shutdown mode
and has fast turn-on time less than 40μs. The other features
include ultra-low dropout voltage, high output accuracy,
current limiting protection and high ripple rejection ratio.
Features
Wide Operating Voltage Range : 1.5V to 5.5V
Output Voltage Range : 1V to 3.3V
Low Dropout : 300mV at 300mA
Ultra-Low-Noise for RF Application
Ultra-Fast Response in Line/Load Transient
Current Limiting Protection
Thermal Shutdown Protection
High Power Supply Rejection Ratio
Only 1μF Output Capacitor Required for Stability
μ
TTL-Logic-Controlled Shutdown Input
RoHS Compliant and Halogen Free
Applications
CDMA/GSM Cellular Handsets
Portable Information Appliances
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
Mini PCI & PCI-Express Cards
PCMCIA & New Cards
Ordering Information
RT9030A
-
Package Type
B : SOT-23-5
Lead Plating System
G : Green (Halogen Free and Pb Free)
Fixed Output Voltage
10 : 1.0V
11 : 1.1V
:
32 : 3.2V
33 : 3.3V
1B : 1.25V
1H : 1.85V
2H : 2.85V
1K : 1.05V
Note :
Richtek products are :
½
Pin Configurations
(TOP VIEW)
VOUT
5
NC
4
2
3
VIN GND EN
SOT-23-5
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.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
½
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9030A-02
December 2013
www.richtek.com
1
RT9030A
Typical Application Circuit
1
C
IN
1µF/X7R
5
C
OUT
1µF/X7R
V
IN
VIN
VOUT
V
OUT
RT9030A
4
Chip Enable
3
EN
GND
2
NC
Functional Pin Description
Pin No.
1
2
3
4
5
Pin Name
VIN
GND
EN
NC
VOUT
Supply Input.
Ground.
Enable Input Logic, Active High. When the EN pin is open, it will be pulled low
internally.
No Internal Connection.
Regulator Output.
Pin Function
Function Block Diagram
POR
OTP
V
REF
-
+
Current
Limit
MOS
Driver
VOUT
EN
VIN
1µA
GND
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS9030A-02
December 2013
RT9030A
Absolute Maximum Ratings
(Note 1)
6V
6V
0.400W
250°C/W
260°C
Supply Input Voltage ------------------------------------------------------------------------------------------------------
EN Input Voltage -----------------------------------------------------------------------------------------------------------
Power Dissipation, P
D
@ T
A
= 25°C
SOT-23-5 --------------------------------------------------------------------------------------------------------------------
Package Thermal Resistance (Note 2)
SOT-23-5,
θ
JA
---------------------------------------------------------------------------------------------------------------
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range --------------------------------------------------------------------------------------------
−65°C
to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
(Note 4)
Input Voltage Range ------------------------------------------------------------------------------------------------------ 1.5V to 5.5V
Junction Temperature Range --------------------------------------------------------------------------------------------
−40°C
to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------------
−40°C
to 85°C
Electrical Characteristics
(V
IN
= V
OUT
+ 0.5V, V
EN
= V
IN
, C
IN
= C
OUT
= 1μF/X5R (Ceramic), T
A
= 25°C, unless otherwise specified)
Parameter
Output Noise Voltage
Output Voltage Accuracy
(Fixed Output Voltage)
Quiescent Current
Shutdown Current
Current Limit
(Note 5)
Symbol
V
ON
V
OUT
I
Q
I
SHDN
I
LIM
Test Conditions
I
OUT
= 0mA
Min
--
2
Typ
30
0
25
0.7
600
400
250
150
--
--
--
1
67
55
40
Max
--
2
50
1.5
--
550
400
300
1
5.5
0.3
3
--
--
--
Unit
V
RMS
%
A
A
mA
I
OUT
= 0mA
V
EN
= 0V
R
LOAD
= 0, 1.5V
V
IN
< 5.5V
V
OUT
= 1.2V to 1.4V,
I
OUT
= 300mA
V
OUT
= 1.5V to 2.4V,
I
OUT
= 300mA
V
OUT
= 2.5V to 3.3V,
I
OUT
= 300mA
V
IN
= (V
OUT
+ 0.6V) to 5.5V,
I
OUT
= 1mA to 300mA
--
--
350
50
40
20
--
1.6
0
--
--
--
--
Dropout Voltage
(Note 6)
V
DROP
mV
Load Regulation
(Note 7)
(Fixed Output Voltage)
EN Threshold
Voltage
EN Pin Current
f = 1kHz
Power Supply
Rejection Rate
f = 10kHz
f = 100kHz
Logic-High
Logic-Low
V
LOAD
V
IH
V
IL
I
EN
PSRR
%
V
A
dB
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9030A-02
December 2013
www.richtek.com
3
RT9030A
Parameter
Line Regulation
Symbol
V
LINE
Test Conditions
V
IN
= (V
OUT
+ 0.6V) to 5.5V,
I
OUT
= 1mA to 300mA
Min
--
--
--
Typ
0.01
150
20
Max
0.2
--
--
Unit
%/V
C
Thermal Shutdown Temperature T
SD
Thermal Shutdown Hysteresis
T
SD
Note 1.
Stresses beyond those listed
“Absolute
Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and 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 may
affect device reliability.
Note 2.
θ
JA
is measured at T
A
= 25°C on a low effective thermal conductivity single-layer test board per JEDEC 51-3.
Note 3.
Devices are ESD sensitive. Handling precaution is recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.
Note 5.
Quiescent, or ground current, is the difference between input and output currents. It is defined by I
Q
= I
IN
- I
OUT
under no
load condition (I
OUT
= 0mA). The total current drawn from the supply is the sum of the load current plus the ground pin
current.
Note 6.
The dropout voltage is defined as V
IN
−
V
OUT
, which is measured when V
OUT
is V
OUT(NORMAL)
−
100mV.
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS9030A-02
December 2013
RT9030A
Typical Operating Characteristics
Output Voltage vs. Temperature
1.80
1.75
31
29
Quiescent Current vs. Temperature
V
IN
= 4.2V
Quiescent Current (µA)
Output Voltage (V)
27
25
23
21
19
17
1.70
1.65
1.60
1.55
V
IN
= 3.3V
V
IN
= 1.65V
V
IN
= 3.3V, V
OUT
= 1.7V
1.50
-50
-25
0
25
50
75
100
125
15
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Dropout Voltage vs. Load Current
0.12
0.10
0.45
0.40
Dropout Voltage vs. Load Current
125°C
25°C
125°C
25°C
Dropout Voltage (V)
0.08
0.06
0.04
0.02
Dropout Voltage (V)
0.35
0.30
0.25
0.20
0.15
0.10
0.05
−40°C
−40°C
V
OUT
= 3.3V
0.00
0
25
50
75
100
125
150
0.00
0
50
100
150
200
V
OUT
= 1.5V
250
300
Load Current (mA)
Load Current (mA)
Power On from EN
V
OUT
= 1.7V, V
IN
= 3.3V, I
LOAD
= 50mA
Power Off from EN
V
OUT
= 1.7V, V
IN
= 3.3V, I
LOAD
= 50mA
V
EN
(5V/Div)
V
EN
(5V/Div)
V
OUT
(500mV/Div)
Time (10μs/Div)
V
OUT
(500mV/Div)
Time (50μs/Div)
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9030A-02
December 2013
www.richtek.com
5
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