DS9013A 02

RT9013A
120mA, Low Dropout, Low Noise Ultra-Fast Without
Bypass Capacitor CMOS LDO Regulator
General Description
The RT9013A is a high-performance, 120mA LDO regulator,
offering extremely high PSRR and ultra-low dropout. The
chip is ideal for portable RF and wireless applications with
demanding performance and space requirements.
The RT9013A provides quiescent current to be as low as
25uA to extend the battery life. The RT9013A also works
with low-ESR ceramic capacitors, reducing the amount of
board space necessary for power applications, especially
for hand-held wireless devices.
The RT9013A consumes typical 0.7uA in shutdown mode
and has fast turn-on time less than 40us. The other features
include ultra-low dropout voltage, high output accuracy,
current limiting protection, and high ripple rejection ratio.
Available in the SC-70-5 and SC-82 packages.
Ordering Information
RT9013APackage Type
U5 : SC-70-5
Y : SC-82
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Note :
Fixed Output Voltage
12 : 1.2V
13 : 1.3V
:
34 : 3.4V
35 : 3.5V
1B : 1.25V
1H : 1.85V
2H : 2.85V
Richtek products are :
`
RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
`
Features
Wide Operating Voltage Ranges : 2.2V to 5.5V
Low Dropout : 60mV at 120mA
Ultra-Low-Noise for RF Application
Ultra-Fast Response in Line/Load Transient
Current Limiting Protection
Thermal Shutdown Protection
High Power Supply Rejection Ratio
Output Only 1uF Capacitor Required for Stability
TTL-Logic-Controlled Shutdown Input
RoHS Compliant and 100% Lead (Pb)-Free
Applications
CDMA/GSM Cellular Handsets
Portable Information Appliances
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
Mini PCI & PCI-Express Cards
PCMCIA & New Cards
Pin Configurations
(TOP VIEW)
VOUT
NC
VIN
VOUT
5
4
4
3
VIN
2
3
GND
EN
SC-70-5
2
EN
GND
SC-82
Note : Pin2 of SC-82 is wider than other pins.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Suitable for use in SnPb or Pb-free soldering processes.
DS9013A-02 April 2011
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1
RT9013A
Typical Application Circuit
VIN
VIN
CIN
1uF/X7R
VOUT
VOUT
COUT
1uF/X7R
RT9013A
Chip Enable
EN
Rpull_down
100k
NC
GND
Functional Pin Description
Pin No.
SC-70-5
Pin Name
SC-82
Pin Function
1
4
VIN
Supply Input
2
2
GND
Common Ground
3
1
EN
4
--
NC
No Internal Connection
5
3
VOUT
Regulator Output
Enable Input Logic, Active High. When the EN goes to a logic low, the
device will be shutdown mode.
Function Block Diagram
EN
Current
Limit
POR
OTP
VIN
VREF
+
MOS
Driver
VOUT
GND
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DS9013A-02 April 2011
RT9013A
Absolute Maximum Ratings
(Note 1)
Supply Input Voltage -----------------------------------------------------------------------------------------------------EN Input Voltage ----------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C
SC-70-5/SC-82 ------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2)
SC-70-5/SC-82, θJA ------------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 3)
HBM -------------------------------------------------------------------------------------------------------------------------MM ----------------------------------------------------------------------------------------------------------------------------
Recommended Operating Conditions
6V
6V
0.3W
333°C/W
260°C
150°C
−65°C to 150°C
2kV
200V
(Note 4)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.2V to 5.5V
Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = VOUT + 0.5V, VEN = VIN, CIN = COUT = 1uF (Ceramic, X7R), TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
2.2
--
5.5
V
Input Voltage Range
V IN
Output Noise Voltage
V ON
V OUT = 1.5V, COUT = 1uF,
IOUT = 0mA
--
30
--
uV RMS
Output Voltage Accuracy
(Fixed Output Voltage)
ΔVOUT
IOUT = 10mA
−2
0
+2
%
Quiescent Current
IQ
V EN = 5V, IOUT = 0mA
--
25
50
uA
Shutdown Current
ISHDN
V EN = 0V
--
0.7
1.5
uA
Current Limit
ILIM
RLOAD = 0Ω, 2.2V ≤ VIN < 5.5V
130
200
300
mA
IOUT = 120mA, 2.2V ≤ VOUT < 3V
--
70
140
IOUT = 120mA, 3V ≤ VOUT ≤ 5.5V
--
60
140
--
--
0.6
Dropout Voltage
(Note 5)
(Note 6)
Load Regulation
(Note 7)
(Fixed Output Voltage)
EN Threshold
V DROP
ΔVLOAD
1mA < IOUT < 120mA
2.2V ≤ VIN < 2.7V
1mA < IOUT < 120mA
2.7V ≤ VIN ≤ 5.5V
mV
%
--
--
1
Logic-Low Voltage V IL
0
--
0.6
Logic-High Voltage V IH
1.6
--
5.5
--
0.1
1
uA
V
Enable Pin Current
IEN
Power Supply Rejection Rate
PSRR
f = 10kHz, IOUT = 100mA
--
−50
--
dB
Line Regulation
ΔVLINE
V IN = (V OUT+0.5) to 5.5V,
IOUT = 1mA
--
0.01
0.2
%/V
To be continued
DS9013A-02 April 2011
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3
RT9013A
Parameter
Symbol
Test Conditions
Min
Typ
Max
Thermal Shutdown Temperature
TSD
--
170
--
Thermal Shutdown Hysteresis
ΔT SD
--
30
--
Unit
°C
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. θJA is measured in the natural convection at TA = 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 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 IQ = IIN - IOUT under no
load condition (IOUT = 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 VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) - 100mV.
Note 7. Regulation is measured at constant junction temperature by using a 2ms current pulse. Devices are tested for load
regulation in the load range from 10mA to 120mA.
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DS9013A-02 April 2011
RT9013A
Typical Operating Characteristics
(CIN = COUT = 1u/X7R, unless otherwise specified)
Output Voltage vs. Temperature
1.60
Quiescent Current vs. Temperature
30
VIN = 2.5V
1.58
Quiescent Current (uA)
1.56
Output Voltage (V)
VIN = 2.5V
28
1.54
1.52
1.50
1.48
1.46
1.44
26
24
22
20
18
16
14
12
1.42
10
1.40
-50
-25
0
25
50
75
100
-50
125
Temperature (°C)
Dropout Voltage vs. Load Current
EN Pin Voltage
(V)
25°C
50
75
100
125
VIN = 2.5V, ILOAD = 50mA
4 VOUT = 1.5V
2
0
50
40
−40°C
30
20
10
VOUT = 2.5V
Output Voltage
(V)
Dropout Voltage (mV)
125°C
60
25
EN Pin Shutdown Response
90
70
0
Temperature (°C)
100
80
-25
2
1
0
0
0
20
40
60
80
100
Time (100us/Div)
120
Load Current (mA)
2
0
1.0
0.5
0
Time (5us/Div)
DS9013A-02 April 2011
Input Voltage
Deviation (V)
4
VIN = 2.5V, ILOAD = 75mA
VOUT = 1.5V
Line Transient Response
Output Voltage
Deviation (mV)
Output Voltage
(V)
EN Pin Voltage
(V)
Start Up
VIN = 2.6V to 3.6V, ILOAD = 10mA
VOUT = 1.5V
3.6
2.6
20
0
-20
Time (100us/Div)
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RT9013A
Noise
VIN = 3.0V (By Battery), No Load
300 VOUT = 1.5V
VIN = 2.6V to 3.6V, ILOAD = 100mA
VOUT = 1.5V
3.6
Noise (μV/Div)
Output Voltage
Deviation (mV)
Input Voltage
Deviation (V)
Line Transient Response
2.6
20
100
0
-100
0
-200
-20
-300
Time (100us/Div)
Time (10ms/Div)
Noise
Load Transient Response
Load Current
(mA)
VIN = 3.0V (By Battery), ILOAD = 10mA
300 VOUT = 1.5V
200
100
100
VIN = 2.5V, ILOAD = 10mA to 100mA
VOUT = 1.5V
50
0
0
Output Voltage
Deviation (mV)
Noise (μV/Div)
200
-100
-200
-300
Time (10ms/Div)
20
50
0
-50
Time (100us/Div)
PSRR
VIN = 2.5V to 2.6V
10
0
PSRR(dB)
-10
-20
-30
-40
-50
-60
ILOAD = 100mA
ILOAD = 10mA
-70
10
100
1000
10000
100000
1000000
Frequency (Hz)
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DS9013A-02 April 2011
RT9013A
Applications Information
Like any low-dropout regulator, the external capacitors used
with the RT9013A must be carefully selected for regulator
stability and performance. Using a capacitor whose value
is > 1uF / X7R on the RT9013A input and the amount of
capacitance can be increased without limit. The input
capacitor must be located a distance of not more than 0.5
inch from the input pin of the IC and returned to a clean
analog ground. Any good quality ceramic can be used for
this capacitor. The capacitor with larger value and lower
ESR (equivalent series resistance) provides better PSRR
and line-transient response.
The output capacitor must meet both requirements for
minimum amount of capacitance and ESR in all LDOs
application. The RT9013A is designed specifically to work
with low ESR ceramic output capacitor in space-saving
and performance consideration. Using a ceramic capacitor
whose value is at least 1uF with ESR is > 20mΩ on the
RT9013A output ensures stability. The RT9013A still works
well with output capacitor of other types due to the wide
stable ESR range. Figure 1. shows the curves of allowable
ESR range as a function of load current for various output
capacitor values. Output capacitor of larger capacitance
can reduce noise and improve load transient response,
stability, and PSRR. The output capacitor should be located
not more than 0.5 inch from the VOUT pin of the RT9013A
and returned to a clean analog ground.
Enable
The RT9013A goes into sleep mode when the EN pin is in
a logic low condition. During this condition, the RT9013A
has an EN pin to turn on or turn off regulator, When the EN
pin is logic hight, the regulator will be turned on. The supply
current to 0.7uA typical. The EN pin may be directly tied
to VIN to keep the part on. The Enable input is CMOS
logic and cannot be left floating.
PSRR
The power supply rejection ratio (PSRR) is defined as the
gain from the input to output divided by the gain from the
supply to the output. The PSRR is found to be
⎛
⎞
PSRR = 20 × log⎜ ΔGain Error ⎟
⎝ ΔSupply ⎠
Note that when heavy load measuring, Δsupply will cause
Δtemperature. And Δtemperature will cause Δoutput
voltage. So the heavy load PSRR measuring is include
temperature effect.
Current limit
The RT9013A contains an independent current limiter, which
monitors and controls the pass transistor's gate voltage,
limiting the output current to 0.2A (typ.). The output can
be shorted to ground indefinitely without damaging the part.
Thermal Considerations
Region of Stable COUT ESR vs. Load Current
Region of Stable COUT ESR (Ω)
100
Unstable Range
10
1
Stable Range
For continuous operation, do not exceed absolute
maximum operation junction temperature 125°C. The
power dissipation definition in device is :
0.1
0.01
VIN = 5V
CIN = COUT = 1uF/X7R
Unstable Range
PD = (VIN − VOUT) x IOUT + VIN x IQ
0.001
0
100
200
300
Load Current (mA)
Figure 1
DS9013A-02 April 2011
400
Thermal protection limits power dissipation in RT9013A.
When the operation junction temperature exceeds 170°C,
the OTP circuit starts the thermal shutdown function and
turns the pass element off. The pass element turn on again
after the junction temperature cools by 30°C.
500
The maximum power dissipation depends on the thermal
resistance of IC package, PCB layout, the rate of
surroundings airflow and temperature difference between
junction to ambient. The maximum power dissipation can
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7
RT9013A
be calculated by following formula :
PD(MAX) = ( TJ(MAX) − TA ) /θJA
Where T J(MAX) is the maximum operation junction
temperature, TA is the ambient temperature and the θJA is
the junction to ambient thermal resistance.
For recommended operating conditions specification of
RT9013A, where T J(MAX) is the maximum junction
temperature of the die (125°C) and TA is the operated
ambient temperature. The junction to ambient thermal
resistance for SC-70-5/SC-82 package is 333°C/W on the
standard JEDEC 51-3 single-layer thermal test board. The
maximum power dissipation at TA = 25°C can be calculated
by following formula :
PD(MAX) = (125°C − 25°C) / 333°C/W = 0.3W for SC-70-5/
SC-82 packages
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal resistance
θJA. For RT9013A packages, the Figure 2 of derating curves
allows the designer to see the effect of rising ambient
temperature on the maximum power allowed.
0.7
Single Layer PCB
Power Dissipation (W)
0.6
0.5
0.4
SC-70-5/SC-82
0.3
0.2
0.1
0
0
12.5 25 37.5 50
62.5 75
87.5 100 113 125
Ambient Temperature (°C)
Figure 2. Derating Curves for RT9013A Packages
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DS9013A-02 April 2011
RT9013A
Outline Dimension
H
D
L
B
C
b
A
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
0.800
1.100
0.031
0.044
A1
0.000
0.100
0.000
0.004
B
1.150
1.350
0.045
0.054
b
0.150
0.400
0.006
0.016
C
1.800
2.450
0.071
0.096
D
1.800
2.250
0.071
0.089
e
0.650
0.026
H
0.080
0.260
0.003
0.010
L
0.210
0.460
0.008
0.018
SC-70-5 Surface Mount Package
DS9013A-02 April 2011
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RT9013A
D
e
H
L
B
C
b1
b
A
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
0.800
1.100
0.031
0.043
A1
0.000
0.100
0.000
0.004
B
1.150
1.350
0.045
0.053
b
0.150
0.400
0.006
0.016
b1
0.350
0.500
0.014
0.020
C
1.800
2.450
0.071
0.096
D
1.800
2.200
0.071
0.087
e
1.300
0.051
H
0.080
0.260
0.003
0.010
L
0.200
0.460
0.008
0.018
SC-82 Surface Mount Package
Richtek Technology Corporation
Richtek Technology Corporation
Headquarter
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
5F, No. 95, Minchiuan Road, Hsintien City
Hsinchu, Taiwan, R.O.C.
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)86672399 Fax: (8862)86672377
Email: [email protected]
Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit design,
specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be guaranteed
by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.
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DS9013A-02 April 2011