RT9010
300mA LDO Regulator with POR
General Description
RT9010 is a low noise, and low dropout with the sourcing
ability up to 300mA and power-on reset function. The range
of output voltage is from 1.2V to 3.6V by operating from
2.5V to 5.5V input.
RT9010 offers 2% accuracy, extremely low dropout voltage
(240mV @ 300mA), and extremely low ground current.
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.
RT9010 is short circuit thermal folded back protected.
RT9010 lowers its OTP trip point from 165°C to 110°C
when output short circuit occurs (V
OUT
< 0.4V) providing
maximum safety to end users.
RT9010 can operate stably with very small ceramic output
capacitors, reducing required board space and component
cost. RT9010 is available in fixed output voltages in the
TSOT-23-6 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
300mA LDO Outputs
High Accuracy
±
2%
Short Circuit Protection
Thermal Shutdown Protection
Current Limit Protection
Short Circuit Thermal Folded Back Protection
Tiny TSOT-23-6 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
RT9010-
Package Type
J6 : TSOT-23-6
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Output Voltage
12 : 1.20V
13 : 1.30V
:
:
35 : 3.50V
36 : 3.60V
1H : 1.85V
2F : 2.65V
2H : 2.85V
Note :
Richtek 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.
Pin Configurations
(TOP VIEW)
VIN
6
EN SET
5
2
4
3
VOUT GND POR
TSOT-23-6
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS9010-05 April 2011
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1
RT9010
Typical Application Circuit
100K
6
1uF
Chip Enable
V
IN
VIN
RT9010
POR
3
POR
5
4
VOUT
EN
SET
GND
1
1uF
2
V
OUT
C
DELAY
Functional Pin Description
Pin No.
1
2
3
4
5
6
Pin Name
VOUT
GND
POR
SET
EN
VIN
Output Voltage.
Common Ground.
Power-On Reset Output : Open-drain output. Active low indicates an
output under voltage condition on regulator.
Delay Set Input. Connect external capacitor to GND to set the internal
delay.
Chip Enable (Active High).
Supply Input Voltage.
Pin Function
Function Block Diagram
EN
0.2uA
Shutdown
and
Logic Control
VIN
V
REF
-
+
MOS Driver
VOUT
Current Limit
and
Thermal
Protection
GND
POR & Delay
Error
Amplifier
SET
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2
DS9010-05 April 2011
RT9010
Absolute Maximum Ratings
(Note 1)
−0.3V
to 6V
−0.3V
to 6V
0.455W
220°C/W
Supply Input Voltage ------------------------------------------------------------------------------------------------------
Other I/O Pin Voltages ---------------------------------------------------------------------------------------------------
Power Dissipation, P
D
@ T
A
= 25°C
TSOT-23-6 -------------------------------------------------------------------------------------------------------------------
Package Thermal Resistance (Note 2)
TSOT-23-6,
θ
JA
-------------------------------------------------------------------------------------------------------------
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range --------------------------------------------------------------------------------------------
−65°C
to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions
(Note 4)
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
Electrical Characteristics
(V
IN
= V
OUT
+ 1V, V
EN
= V
IN
, C
IN
= C
OUT
= 1μF, T
A
= 25°C, unless otherwise specified.)
Parameter
Input Voltage
Dropout Voltage
(Note 5)
Symbol
V
IN
V
DROP
V
OUT
ΔV
OUT
ΔV
LINE
Test Conditions
V
IN
= 2.5V to 5.5V
I
OUT
= 150mA, V
OUT
> 2.8V
I
OUT
= 300mA, V
OUT
> 2.8V
I
OUT
= 1mA
V
IN
= (V
OUT
+ 0.3V) to 5.5V or
V
IN
> 2.5V, whichever is larger
Min
2.5
--
--
1.2
−2
--
--
330
--
--
1.5
--
--
--
--
Typ
--
120
240
--
--
--
--
450
58
--
--
--
100
170
40
Max
5.5
--
--
3.6
+2
0.2
0.6
700
80
1
--
0.4
--
--
--
Unit
V
mV
mV
V
%
%/V
%
mA
μA
μA
V
ppm/°C
°C
°C
Output Voltage Range
Output Voltage Accuracy
Line Regulation
Load Regulation
Current Limit
Quiescent Current
Shutdown Current
EN Threshold Voltage
Output Voltage TC
Thermal Shutdown
Thermal Shutdown Hysteresis
ΔV
LOAD
1mA < I
OUT
< 300mA
I
LIM
I
Q
I
Q_SD
Logic-High V
IH
Logic-Low
V
IL
T
SD
ΔT
SD
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
To be continued
DS9010-05 April 2011
www.richtek.com
3
RT9010
Parameter
PSRR
Loading=10mA
Symbol
Test Conditions
f =100Hz
PSRR
f =1kHz
f =10kHz
f =100Hz
PSRR
Loading=150mA
PSRR
f =1kHz
f =10kHz
V
THL
Reset Threshold
V
THH
POR Output Logic Low Voltage
POR Leakage Current
Set pin current source
Set pin threshold
High Threshold, % of nominal V
OUT
(Flag Off)
--
--
−1
0.60
--
--
0.02
0.01
1.25
1.4
96
0.1
1
1.70
--
%
V
μA
μA
V
Low Threshold, % of nominal V
OUT
(Flag On)
Min
--
--
--
--
--
--
90
Typ
−65
−60
−50
−65
−50
−50
--
Max
--
--
--
--
--
--
--
Unit
dB
dB
dB
dB
dB
dB
%
V
POR_L
I
L
= 250μA
I
POR
Flag off
V
SET
= 0
POR = high
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.
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 3.
Devices are ESD sensitive. Handling precaution recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.
Note 5.
The dropout voltage is defined as V
IN
-V
OUT
, which is measured when V
OUT
is V
OUT(NORMAL)
−
100mV.
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4
DS9010-05 April 2011
RT9010
Typical Operating Characteristics
Output Voltage vs. Temperature
1.9
Output Voltage vs. Temperature
3.4
RT9010-18
RT9010-33
Output Voltage (V)
Output Voltage (V)
1.85
3.35
1.8
3.3
1.75
3.25
1.7
-50
-25
0
25
50
75
100
125
3.2
-50
-25
0
25
50
75
100
125
Temperature
(°C)
Temperature
(°C)
Quiescent Current vs. Temperature
70
Dropout Voltage vs. Load Current
350
300
RT9010-33
V
IN
= V
EN
= 4.3V
RT9010-33
T
J
= 125°C
T
J
= 25°C
Quiescent Current (uA)
65
Dropout Voltage (mV)
C
IN
= C
OUT
1uF/X7R
250
200
150
100
50
60
T
J
= -40°C
55
50
-50
-25
0
25
50
75
100
125
0
0
50
100
150
200
250
300
Temperature
(°C)
Load Current (mA)
20
PSRR
RT9010-15
V
IN
= 4.3V
±
0.1V
C
IN
= C
OUT
1uF/X7R
I
LOAD
= 100mA
I
LOAD
= 50mA
10000
1000
100
10
1
0.1
POR Delay
RT9010-28
0
PSRR (dB)
-20
-40
I
LOAD
= 10mA
-60
POR Delay Time (ms)
-80
0.01
10
0.1
100
1
1000
10k
10000
100k
100000
1000k
1000000
0.01
0.0001
0.0001
0.0010
0.001
0.0100
0.01
0.1000
0.1
1.0000
1
Frequency (Hz)
(Hz)
POR Setting Capacitance (uF)
DS9010-05 April 2011
www.richtek.com
5
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