RT9193-25PU5 [RICHTEK]
300mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator;
| 型号： | RT9193-25PU5 |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | 300mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator |
| 文件： | 总12页 (文件大小：208K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RT9193
300mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator
General Description
Features
z Ultra-Low-Noise for RF Application
The RT9193 is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9193 performance is optimized for
battery-powered systems to deliver ultra low noise and
low quiescent current. A noise bypass pin is available for
further reduction of output noise. Regulator ground current
increases only slightly in dropout, further prolonging the
battery life. The RT9193 also works with low-ESR ceramic
capacitors, reducing the amount of board space necessary
for power applications, critical in hand-held wireless
devices. The RT9193 consumes less than 0.01μA in
shutdown mode and has fast turn-on time less than 50μs.
The other features include ultra low dropout voltage, high
output accuracy, current limiting protection, and high ripple
rejection ratio. Available in the 5-lead of SC-70, SOT-23
and WDFN-6L 2x2 packages.
z Ultra-Fast Response in Line/Load Transient
z Quick Start-Up (Typically 50μs)
z < 0.01μA Standby Current When Shutdown
z Low Dropout : 220mV @ 300mA
z Wide Operating Voltage Ranges : 2.5V to 5.5V
z TTL-Logic-Controlled Shutdown Input
z Low Temperature Coefficient
z Current Limiting Protection
z Thermal Shutdown Protection
z Only 1μF Output Capacitor Required for Stability
z High Power Supply Rejection Ratio
z Custom Voltage Available
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z CDMA/GSM Cellular Handsets
z Battery-Powered Equipment
z Laptop, Palmtops, Notebook Computers
z Hand-Held Instruments
Ordering Information
RT9193-
Package Type
U5 : SC-70-5
B : SOT-23-5
QW : WDFN-6L 2x2 (W-Type)
z PCMCIA Cards
z Portable InformationAppliances
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
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.
Output Voltage
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
1H : 1.85V
2H : 2.85V
4G : 4.75V
Pin Configurations
(TOP VIEW)
1
2
3
5
VIN
GND
EN
VOUT
1
2
3
6
5
4
EN
GND
VIN
BP
Note :
NC
RichTek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
VOUT
BP
4
SC-70-5/SOT-23-5
WDFN-6L 2x2
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
DS9193-09 March 2007
www.richtek.com
1
RT9193
Typical Application Circuit
RT9193
V
IN
VIN
VOUT
V
OUT
C
IN
C
OUT
GND
EN
1uF/X7R
1uF/X7R
Chip Enable
BP
C
BP
22nF
Functional Pin Description
Pin Name Pin Function
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100kΩ
EN
resistor connected to GND when the control signal is floating.
BP
Reference Noise Bypass
Ground
GND
VOUT
VIN
Output Voltage
Power Input Voltage
Function Block Diagram
EN
Shutdown
and
Logic Control
VIN
Quick
Start
V
BP
REF
+
MOS Driver
Error
Amplifier
VOUT
GND
Current-Limit
and
Thermal
Protection
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2
DS9193-09 March 2007
RT9193
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage------------------------------------------------------------------------------------------------------ 6V
z PowerDissipation, PD @ TA = 25°C
SC-70-5 ---------------------------------------------------------------------------------------------------------------------- 300mW
SOT-23-5 -------------------------------------------------------------------------------------------------------------------- 400mW
WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------- 606mW
z Package Thermal Resistance (Note 4)
SOT-70-5, θJA --------------------------------------------------------------------------------------------------------------- 333°C/W
SOT-23-5, θJA --------------------------------------------------------------------------------------------------------------- 250°C/W
WDFN-6L 2x2, θJA --------------------------------------------------------------------------------------------------------- 165°C/W
z Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------------------- 260°C
z Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 2)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions (Note 3)
z Supply Input Voltage------------------------------------------------------------------------------------------------------ 2.5V to 5.5V
z EN Input Voltage ----------------------------------------------------------------------------------------------------------- 0V to 5.5V
z Junction Temperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range-------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = VOUT + 1V, CIN = COUT = 1μF, CBP = 22nF, TA = 25°C, unless otherwise specified)
Parameter
Output Voltage Accuracy
Current Limit
Symbol
Test Conditions
= 1mA
OUT
Min
−2
Typ
--
Max Units
ΔV
I
+2
--
%
mA
μA
OUT
I
R
V
= 1Ω
LOAD
360
--
400
90
LIM
≥
Quiescent Current
I
Q
1.2V, I = 0mA
OUT
130
200
300
EN
OUT
OUT
I
I
= 200mA, V
> 2.8V
> 2.8V
170
220
OUT
OUT
Dropout Voltage
Line Regulation
(Note 5)
V
mV
%
DROP
= 300mA, V
--
--
V
IN
= (V
+ 1V) to 5.5V,
OUT
ΔV
--
0.3
LINE
I
= 1mA
OUT
Load Regulation
ΔV
1mA < I
< 300mA
--
--
--
0.01
0
0.6
1
%
μA
nA
LOAD
OUT
Standby Current
I
V
V
V
V
= GND, Shutdown
= GND or VIN
STBY
IBSD
EN
EN
IN
EN Input Bias Current
I
--
100
0.4
--
Logic-Low Voltage
Logic-High Voltage
V
IL
= 3V to 5.5V, Shutdown
= 3V to 5.5V, Start-Up
--
--
EN Threshold
V
V
IH
1.2
--
IN
10Hz to 100kHz, I
= 200mA
OUT
Output Noise Voltage
e
--
100
--
μVRMS
NO
C
= 1μF
OUT
Power Supply
Rejection Rate
f = 100Hz
f = 10kHz
--
--
--
−70
−50
165
--
--
--
PSRR
C
= 1μF, I
= 10mA
dB
OUT
OUT
Thermal Shutdown Temperature
T
°C
SD
To be continued
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DS9193-09 March 2007
RT9193
Parameter
Symbol
Test Conditions
Min
Typ
Max Units
-- °C
Thermal Shutdown Temperature
Hysteresis
ΔT
--
30
SD
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. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board
(Single Layer, 1S) of JEDEC 51-3 thermal measurement standard.
Note 5. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV.
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DS9193-09 March 2007
RT9193
Typical Operating Characteristics
Output Voltage vs. Temperature
Quiescent Current vs. Temperature
1.8
95
90
85
80
75
70
65
60
RT9193-15CU5
VIN = 3.3V
CIN = COUT = 1uF X7R
RT9193-15CU5
VIN = 3.3V
CIN = COUT = 1uF X7R
1.7
1.6
1.5
1.4
1.3
1.2
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
(°C)
Temperature
Temperature
(°C)
Dropout Voltage vs. Load Current
PSRR
20
0
300
250
200
150
100
50
VIN = 4V to 5V
CIN = COUT = 1uF, X7R
RT9193-33CB
CIN = COUT = 1uF
TJ = 125°C
-20
-40
-60
-80
TJ = 25°C
TJ = -40°C
ILoad = 100mA
ILoad = 10mA
0
10
100
1K
10K
100K
1M
0
0.05
0.1
0.15
0.2
0.25
0.3
Frequency (Hz)
Load Current (A)
EN Pin Shoutdown Threshold vs. Temperature
EN Pin Shutdown Response
1.75
RT9193-15CU5
VIN = 3.3V
CIN = COUT = 1uF X7R
VIN = 5V
CIN = COUT = 1uF
RT9193-28CU5
No Load
10
1.5
1.25
1
5
0
2
1
0
0.75
0.5
-50
-25
0
25
50
75
100
125
Time (500μs/Div)
Temperature (°C)
DS9193-09 March 2007
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5
RT9193
Load Transient Response
Load Transient Response
ILoad = 1mA to 250mA
VIN = 5V, VOUT = 2.8V
CIN = COUT = 1uF
ILoad = 1mA to 60mA
VIN = 5V, VOUT = 2.8V
CIN = COUT = 1uF
100
50
0
400
200
0
20
0
50
0
-20
-50
Time (500μs/Div)
Time (500μs/Div)
Line Transient Response
Line Transient Response
VIN = 4V to 5V
COUT = 1uF
RT9193-25CB
ILoad = 1mA
VIN = 4V to 5V
COUT = 1uF
RT9193-25CB
ILoad = 100mA
6
5
4
6
5
4
10
0
10
0
-10
-10
Time (100μs/Div)
Time (50μs/Div)
Noise
Noise
RT9193-30CB
ILoad = 50mA
VIN = 4.5V
CIN = COUT = 1uF, X7R
VIN = 4.5V
CIN = COUT = 1uF, X7R
RT9193-15CU5
ILoad = 50mA
200
100
0
200
100
0
-100
-200
-100
-200
f = 10Hz to 100kHz
f = 10Hz to 100kHz
Time (10ms/Div)
Time (10ms/Div)
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6
DS9193-09 March 2007
RT9193
Start Up
VIN = 5V
CIN = COUT = 1uF
RT9193-28CU5
No Load
10
5
0
2
1
0
Time (10μs/Div)
DS9193-09 March 2007
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7
RT9193
Applications Information
Bypass Capacitor and Low Noise
Like any low-dropout regulator, the external capacitors
used with the RT9193 must be carefully selected for
regulator stability and performance. Using a capacitor
whose value is > 1μF on the RT9193 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 or
tantalum 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 RT9193 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 1μF with ESR
is > 25mΩ on the RT9193 output ensures stability. The
RT9193 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 RT9193 and returned to a
clean analog ground.
Connecting a 22nF between the BP pin and GND pin
significantly reduces noise on the regulator output, it is
critical that the capacitor connection between the BP pin
andGNDpin be direct and PCB traces should be as short
as possible. There is a relationship between the bypass
capacitor value and the LDO regulator turn on time. DC
leakage on this pin can affect the LDO regulator output
noise and voltage regulation performance.
Enable Function
The RT9193 features an LDO regulator enable/disable
function. To assure the LDO regulator will switch on, the
EN turn on control level must be greater than 1.2 volts.
The LDO regulator will go into the shutdown mode when
the voltage on the EN pin falls below 0.4 volts. For to
protecting the system, the RT9193 have a quick-discharge
function. If the enable function is not needed in a specific
application, it may be tied to VIN to keep the LDO regulator
in a continuously on state.
Thermal Considerations
Thermal protection limits power dissipation in RT9193.
When the operation junction temperature exceeds 165°C,
the OTP circuit starts the thermal shutdown function turn
the pass element off. The pass element turn on again
after the junction temperature cools by 30°C.
For continue operation, do not exceed absolute maximum
operation junction temperature 125°C. The power
dissipation definition in device is :
Region of Stable COUT ESR vs. Load Current
100
Instable
PD = (VIN−VOUT) x IOUT + VIN x IQ
10
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
be calculated by following formula :
1
Stable
0.10
0.01
0.00
PD(MAX) = ( TJ(MAX) − TA ) /θJA
RT9193-15CU5
CIN = COUT = 1uF, X7R
Simulation Verify
Where TJ(MAX) is the maximum operation junction
temperature 125°C, TA is the ambient temperature and
the θJA is the junction to ambient thermal resistance.
0
50
100
150
200
250
300
Load Current (mA)
Figure 1
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8
DS9193-09 March 2007
RT9193
For recommended operating conditions specification of
RT9193, where TJ(MAX) is the maximum junction
temperature of the die (125°C) and TA is the maximum
ambient temperature. The junction to ambient thermal
resistance (θJA is layout dependent) for SOT-23-5 package
is 250°C/W, SC-70-5 package is 333°C/W and WDFN-6L
2x2 package is 165°C/W on standard JEDEC 51-3 thermal
test board. The maximum power dissipation at TA = 25°C
can be calculated by following formula :
PD(MAX) = (125°C−25°C) / 333 = 300mW (SC-70-5)
PD(MAX) = (125°C−25°C) / 250 = 400mW (SOT-23-5)
PD(MAX) = (125°C−25°C) / 165 = 606mW (WDFN-6L 2x2)
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance θJA. For RT9193 packages, the Figure 2 of
derating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
allowed.
700
WDFN-6L 2x2
600
500
SOT-23-5
400
SC 70-5
300
200
100
0
0
25
50
75
100
125
150
Ambient Temperature (°C)
Figure 2.Derating Curve for Packages
DS9193-09 March 2007
www.richtek.com
9
RT9193
Outline Dimension
H
D
L
B
C
A
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.800
0.000
1.150
0.150
1.800
1.800
1.100
0.100
1.350
0.400
2.450
2.250
0.031
0.000
0.045
0.006
0.071
0.071
0.044
0.004
0.054
0.016
0.096
0.089
b
C
D
e
0.650
0.026
H
L
0.080
0.210
0.260
0.460
0.003
0.008
0.010
0.018
SC-70-5 Surface Mount Package
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DS9193-09 March 2007
RT9193
H
D
L
B
C
A
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.889
0.000
1.397
0.356
2.591
2.692
0.838
0.080
0.300
1.295
0.152
1.803
0.559
2.997
3.099
1.041
0.254
0.610
0.035
0.000
0.055
0.014
0.102
0.106
0.033
0.003
0.012
0.051
0.006
0.071
0.022
0.118
0.122
0.041
0.010
0.024
b
C
D
e
H
L
SOT-23-5 Surface Mount Package
DS9193-09 March 2007
www.richtek.com
11
RT9193
D
D2
L
E
E2
SEE DETAIL A
1
b
e
2
1
2
1
A
A3
A1
DETAILA
Pin #1 ID and Tie Bar Mark Options
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
A3
b
0.700
0.000
0.175
0.200
1.950
1.000
1.950
0.500
0.800
0.050
0.250
0.350
2.050
1.450
2.050
0.850
0.028
0.000
0.007
0.008
0.077
0.039
0.077
0.020
0.031
0.002
0.010
0.014
0.081
0.057
0.081
0.033
D
D2
E
E2
e
0.650
0.026
L
0.300
0.400
0.012
0.016
W-Type 6L DFN 2x2 Package
Richtek Technology Corporation
Headquarter
Richtek Technology Corporation
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
8F, No. 137, Lane 235, Paochiao Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)89191466 Fax: (8862)89191465
Email: marketing@richtek.com
www.richtek.com
12
DS9193-09 March 2007
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