RT9183L-12PGF [RICHTEK]
Ultra Low Dropout 1.5A Linear Regulator; 超低压差1.5A线性稳压器
| 型号： | RT9183L-12PGF |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | Ultra Low Dropout 1.5A Linear Regulator |
| 文件： | 总16页 (文件大小：214K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RT9183
Ultra Low Dropout 1.5A Linear Regulator
General Description
Features
z 330mV Dropout @ 1.5A
The RT9183 series are high performance linear voltage
regulators that provide ultra low-dropout voltage, high output
current with low ground current. It operates from an input
of 2.3V to 5.5V and provides output current up to 1.5A
thus is suitable to drive digital circuits requiring low voltage
at high currents.
z 380μA Low Ground Pin Current
z Excellent Line and Load Regulation
z 0.1μA Quiescent Current in Shutdown Mode
z Guaranteed 1.5A Output Current
z Fixed Output Voltages : 1.2V, 1.8V, 2.5V, 3.3V
z Adjustable Output Voltage from 0.8V to 4.5V
z Over-Temperature/Over-Current Protection
z RoHS Compliant and 100% Lead (Pb)-Free
The RT9183 has superior regulation over variations in line
and load. Also it provides fast respond to step changes in
load. Other features include over-current and over-
temperature protection. The adjustable version has enable
pin to reduce power consumption in shutdown mode.
Applications
z Battery-Powered Equipment
z Mother Board/Graphic Card
z Peripheral Cards
The devices are available in fixed output voltages of 1.2V,
1.8V, 2.5V, 3.3V and as an adjustable device with a 0.8V
reference voltage. The RT9183 regulators are available in
3-lead SOT-223 and TO-263 packages (fixed output only
for the 3-lead option). Also available are 5-lead TO-263
and fused SOP-8 packages with two external resistors to
set the output voltage ranges from 0.8V to 4.5V.
z PCMCIA Card
Pin Configurations
(TOP VIEW)
Ordering Information
1
2
3
1
2
3
-
RT9183
Package Type
G : SOT-223
GF : SOT-223 (F-Type)
S : SOP-8
GND
VOUT
(TAB)
VIN
VIN
GND VOUT
(TAB)
SOT-223 (F-Type)
SOT-223
M : TO-263
M5 : TO-263-5
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage
Defauit : Adjustable
12 : 1.2V
1
2
3
4
5
1
2
3
18 : 1.8V
25 : 2.5V
33 : 3.3V
ADJ
VOUT
GND(TAB)
EN VIN
VIN
GND(TAB)
VOUT
H : Chip Enable High
L : Chip Enable Low
TO-263-5
TO-263
Note :
EN
8
7
6
5
GND
GND
GND
GND
RichTek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
VIN
VOUT
ADJ
2
3
4
`Suitable for use in SnPb or Pb-free soldering processes.
`100%matte tin (Sn) plating.
SOP-8
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RT9183
Typical Application Circuit
(SOT-223 & TO-263)
RT9183
V
OUT
2.5V, 1.5A
VIN
VOUT
V
= 3.3V
IN
GND
C
C
OUT
IN
10uF
10uF
Figure 1. 3.3V to 2.5V Regulator
(SOP-8 & TO-263-5)
RT9183
V
V
VIN
EN
VOUT
IN
OUT
R
R
1
C
Enable
ADJ
OUT
GND
C
10uF
IN
C
0.1uF
10uF
2
R1
Note: The value of R2 should be less
VOUT = 0.8×(1+
)Volts
R2
than 80k to maintain
regulation.
Figure 2. Adjustable Operation
(SOP-8 & TO-263-5)
RT9183
V
V
VIN
VOUT
ADJ
OUT
IN
C
OUT
Enable
EN GND
C
10uF
10uF
C
IN
0.1uF
Figure 3. Fixed Operation with SOP-8 and TO-263-5 packages
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RT9183
Functional Pin Description
Pin Name
Pin Function
Chip Enable Control Input.
EN
Note that the device will be in the unstable state if the pin is not connected.
VIN
Supply Input
GND
VOUT
Common Ground
Regulator Output
The output voltage is set by the internal feedback resistors when this pin
grounded. If external feedback resistors are applied, the output voltage will be:
ADJ
V
OUT
= 0.8 × (1 + R1 ) Volts
R2
Function Block Diagram
VIN
Current Limit
Sensor
+
-
Error
Amplifier
0.8V
Reference
-
+
VOUT
ADJ
Shutdown
Logic
Thermal
Shutdown
EN
-
+
100mV
Output Mode
Comparator
GND
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RT9183
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage------------------------------------------------------------------------------------------------------ 6V
z Package Thermal Resistance
SOT-223, θJA ---------------------------------------------------------------------------------------------------------------- 115°C/W
SOT-223, θJC --------------------------------------------------------------------------------------------------------------- 15°C/W
SOT-223 (F-Type), θJA ---------------------------------------------------------------------------------------------------- 135°C/W
SOT-223 (F-Type), θJC ---------------------------------------------------------------------------------------------------- 17°C/W
SOP-8, θJA ------------------------------------------------------------------------------------------------------------------ 125°C/W
SOP-8, θJC ------------------------------------------------------------------------------------------------------------------ 20°C/W
TO-263, θJA ----------------------------------------------------------------------------------------------------------------- 45°C/W
TO-263, θJC ----------------------------------------------------------------------------------------------------------------- 8°C/W
z PowerDissipation, PD@TA = 25°C
SOT-223 --------------------------------------------------------------------------------------------------------------------- 0.87W
SOT-223 (F-Type) ---------------------------------------------------------------------------------------------------------- 0.74W
SOP-8 ------------------------------------------------------------------------------------------------------------------------ 0.8W
TO-263 ----------------------------------------------------------------------------------------------------------------------- 2.22W
z Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------------------- 260°C
z Junction Temperature ----------------------------------------------------------------------------------------------------- 150°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------------------------------------------------------------------------------------------------------ 2.3V to 5.5V
z Junction Temperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C
Electrical Characteristics
(VIN = VOUT + 0.7V, CIN =COUT = 10μF (Ceramic), TA = 25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Output Voltage Accuracy
(Fixed Output Voltage)
ΔV
I
= 10mA
−2
0
+2
%
OUT
OUT
Output Voltage Range (Adjustable)
V
I
0.8
--
--
4.5
500
1
V
μA
μA
A
OUT_ADJ
Quiescent Current
Standby Current
Current Limit
(Note 6)
(Note 7)
I
= 0mA, Enable
380
0.1
3.2
110
Q
OUT
I
V
= 5.5V, Shutdown
--
STBY
LIM
IN
I
2
4.2
300
I
= 0.5A
--
OUT
Dropout Voltage
Line Regulation
(Note 4)
V
mV
DROP
I
I
= 1.0A
= 1.5A
--
--
220
330
400
500
OUT
OUT
V
+ 0.7V < V < 5.5V
OUT
IN
ΔV
--
0.035
0.18
%/V
LINE
I
= 10mA
OUT
To be continued
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DS9183-12 March 2007
RT9183
Parameter
Load Regulation (Note 5)
Symbol
Test Conditions
1mA < I < 1.5A
Min
Typ
Max
Units
ΔV
--
22
45
mV
LOAD
OUT
(Fixed Output Voltage)
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
T
--
--
170
30
--
--
--
°C
°C
SD
ΔT
SD
Logic-Low Voltage
EN Threshold
V
V
I
V
IN
V
IN
V
IN
= 5.5V
--
0.6
--
IL
IH
V
Logic-High Voltage
= 5.5V
= 5.5V, Enable
1.8
--
--
Enable Pin Current
ADJ
0.1
1
μA
EN
Reference Voltage Tolerance
Adjust Pin Current
Adjust Pin Threshold
V
0.784
--
0.8
10
0.816
100
V
nA
V
REF
I
V
ADJ = V
ADJ
REF
V
0.05
0.1
0.2
TH(ADJ)
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 ESDsensitive. Handling precaution recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV.
Note 5. Regulation is measured at constant junction temperature by using a 20ms current pulse. Devices are tested for
load regulation in the load range from 10mA to 1.5A.
Note 6. 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 7. Standby current is the input current drawn by a regulator when the output voltage is disabled by a shutdown
signal (VEN >1.8V ). It is measured with VIN = 5.5V.
Note 8. θJA is measured in natural convection (still air) at TA = 25°C with the component mounted on a low effective
thermal conductivity test board of JEDEC 51-3 thermal measurement standard. And the cooper area of PCB
layout is 4mm x 2.5mm on SOT-223, 14mm x 14mm on TO-263 for thermal measurement.
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RT9183
Typical Operating Characteristics
Output Voltage vs. Temperature
Output Voltage vs. Temperature
1.9
2.6
2.55
2.5
∞
VIN = 5V, RL =
∞
VIN = 5V, RL =
CIN = COUT = 10uF (Ceramic,Y5V)
CIN = COUT = 10uF (Ceramic,Y5V)
1.85
1.8
2.45
2.4
1.75
1.7
RT9183H-18CS
75 100 125
RT9183-25CG
75 100 125
-50
-25
0
25
50
-50
-25
0
25
50
Temperature (°C)
Temperature
(°C)
Quiescent Current vs. Temperature
Quiescent Current vs. Temperature
400
380
360
340
320
300
400
380
360
340
320
300
∞
∞
VIN = 5V, RL =
VIN = 5V, RL =
CIN = COUT = 10uF
(Ceramic,Y5V)
CIN = COUT = 10uF
(Ceramic,Y5V)
RT9183H-18CS
75 100 125
RT9183-25CG
-50
-25
0
25
50
-50
-25
0
25
50
75
100
125
Temperature
Temperature
(°C)
(°C)
Current Limit vs. Temperature
Current Limit vs. Temperature
4
3.8
3.6
3.4
3.2
3
4
3.8
3.6
3.4
3.2
3
VIN = 5V, CIN = COUT = 10uF(Ceramic,Y5V)
VIN = 5V, CIN = COUT = 10uF(Ceramic,Y5V)
RT9183L-33CM5
75 100 125
RT9183-25CG
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
Temperature
Temperature
(°C)
(°C)
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RT9183
Dropout Voltage vs. Load Current
Dropout Voltage vs. Load Current
500
400
300
200
100
0
500
400
300
200
100
0
TJ = 125°C
TJ = 125°C
TJ = +25°C
TJ = +25°C
TJ = -40°C
TJ = -40°C
RT9183-25CG
RT9183L-33CM5
0
0.3
0.6
0.9
1.2
1.5
0
0.3
0.6
0.9
1.2
1.5
Load Current (A)
Load Current (A)
Dropout Voltage vs. Load Current
Load Transient Response
400
300
200
100
0
RT9183H-CS
VOUT = 3.3V
COUT = 47uF/Low ESR, ILOAD = 1mA to 750mA
T = 125°C
J
1
0.5
0
T = 25°C
J
20
0
T = -40°C
J
-20
RT9183H-18CS
0
0.3
0.6
0.9
1.2
1.5
Time (100us/Div)
Load Current (A)
Load Transient Regulation
Load Transient Response
RT9183-12CGF
COUT = 47uF/Low ESR, ILOAD = 1mA to 1.5A
2
20
0
1
0
50
0
500
0
-50
RT9183H-18CS
COUT = 47uF/Low ESR
ILOAD = 1mA to 750mA
Time (100us/Div)
Time (100us/Div)
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RT9183
Line Transient Response
Line Transient Regulation
COUT = 47uF/Low ESR, ILOAD = 100mA
ILOAD = 100mA
COUT = 47uF/Low ESR
5
4
5
4
10
0
10
0
-10
RT9183H-18CS
RT9183-12CGF
Time (100us/Div)
Time (100us/Div)
EN Pin Shutdown Threshold vs. Temperature
1.1
EN Pin Shutdown Response
CIN = COUT = 10uF (Ceramic,Y5V)
ILOAD = 100mA, VIN = 5V, T =25°C
A
1
5
0
VOUT Off to On
0.9
2
VOUT On to Off
0.8
1
0
RT9183L-33CM5
0.7
RT9183H-18CS
-50
-25
0
25
50
75
100
125
Time (500us/Div)
Temperature
(°C)
Reference Voltage vs. Temperature
0.85
0.83
0.81
0.79
0.77
0.75
VIN = 5V,CIN = COUT = 10uF (Electrolysis)
RT9183H-CS
-25
-50
0
25
50
75
100
125
(°C)
Temperature
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DS9183-12 March 2007
RT9183
Application Information
No Load Stability
Like any low-dropout regulator, the RT9183 series requires
input and output decoupling capacitors. These capacitors
must be correctly selected for good performance (see
Capacitor Characteristics Section). Please note that linear
regulators with a low dropout voltage have high internal
loop gains which require care in guarding against
oscillation caused by insufficient decoupling capacitance.
The device will remain stable and in regulation with no
external load. This is specially important in CMOS RAM
keep-alive applications.
Input-Output (Dropout) Voltage
A regulator's minimum input-to-output voltage differential
(dropout voltage) determines the lowest usable supply
voltage. In battery-powered systems, this determines the
useful end-of-life battery voltage. Because the device uses
a PMOS, its dropout voltage is a function of drain-to-source
on-resistance, RDS(ON), multiplied by the load current:
Input Capacitor
An input capacitance of ≅10μF is required between the
device input pin and ground directly (the amount of the
capacitance may be increased without limit). The input
capacitor MUST be located less than 1 cm from the device
to assure input stability (see PCB Layout Section).Alower
ESR capacitor allows the use of less capacitance, while
higher ESR type (like aluminum electrolytic) require more
capacitance.
VDROPOUT = VIN - VOUT = RDS(ON) × IOUT
Current Limit
The RT9183 monitors and controls the PMOS' gate
voltage, minimum limiting the output current to 2A . The
output can be shorted to ground for an indefinite period of
time without damaging the part.
Capacitor types (aluminum, ceramic and tantalum) can be
mixed in parallel, but the total equivalent input capacitance/
ESR must be defined as above to stable operation.
Short-Circuit Protection
There are no requirements for the ESR on the input
capacitor, but tolerance and temperature coefficient must
be considered when selecting the capacitor to ensure the
capacitance will be≅10μF over the entire operating
temperature range.
The device is short circuit protected and in the event of a
peak over-current condition, the short-circuit control loop
will rapidly drive the output PMOS pass element off. Once
the power pass element shuts down, the control loop will
rapidly cycle the output on and off until the average power
dissipation causes the thermal shutdown circuit to respond
to servo the on/off cycling to a lower frequency. Please
refer to the section on thermal information for power
dissipation calculations.
Output Capacitor
The RT9183 is designed specifically to work with very
small ceramic output capacitors. The recommended
minimum capacitance (temperature characteristics X7R or
X5R) are 10μF to 47μF range with 10mΩ to 25mΩ range
ceramic capacitors between each LDO output andGNDfor
transient stability, but it may be increased without limit.
Higher capacitance values help to improve transient.
Capaacitor Characteristics
It is important to note that capacitance tolerance and
variation with temperature must be taken into consideration
when selecting a capacitor so that the minimum required
amount of capacitance is provided over the full operating
temperature range. In general, a good tantalum capacitor
will show very little capacitance variation with temperature,
but a ceramic may not be as good (depending on dielectric
type). Aluminum electrolytics also typically have large
temperature variation of capacitance value.
The output capacitor's ESR is critical because it forms a
zero to provide phase lead which is required for loop
stability.
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RT9183
Equally important to consider is a capacitor's ESR change
with temperature: this is not an issue with ceramics, as
their ESR is extremely low. However, it is very important
in tantalum and aluminum electrolytic capacitors. Both
show increasing ESR at colder temperatures, but the
increase in aluminum electrolytic capacitors is so severe
they may not be feasible for some applications.
The increasing ESR at lower temperatures can cause
oscillations when marginal quality capacitors are used (if
the ESR of the capacitor is near the upper limit of the
stability range at room temperature).
Aluminum:
This capacitor type offers the most capacitance for the
money. The disadvantages are that they are larger in
physical size, not widely available in surface mount, and
have poor AC performance (especially at higher
frequencies) due to higher ESR and ESL.
Ceramic:
For values of capacitance in the 10μF to 100μF range,
ceramics are usually larger and more costly than tantalums
but give superior AC performance for by-passing high
frequency noise because of very low ESR (typically less
than 10mΩ). However, some dielectric types do not have
good capacitance characteristics as a function of voltage
and temperature.
Compared by size, the ESR of an aluminum electrolytic is
higher than either Tantalum or ceramic, and it also varies
greatly with temperature. A typical aluminum electrolytic
can exhibit an ESR increase of as much as 50X when going
from 25°C down to -40°C.
Z5U and Y5V dielectric ceramics have capacitance that
drops severely with applied voltage. Atypical Z5U or Y5V
capacitor can lose 60% of its rated capacitance with half
of the rated voltage applied to it. The Z5U and Y5V also
exhibit a severe temperature effect, losing more than 50%
of nominal capacitance at high and low limits of the
temperature range.
It should also be noted that many aluminum electrolytics
only specify impedance at a frequency of 120Hz, which
indicates they have poor high frequency performance. Only
aluminum electrolytics that have an impedance specified
at a higher frequency (between 20kHz and 100kHz) should
be used for the device. Derating must be applied to the
manufacturer's ESR specification, since it is typically only
valid at room temperature.
X7R and X5R dielectric ceramic capacitors are strongly
recommended if ceramics are used, as they typically
Any applications using aluminum electrolytics should be
thoroughly tested at the lowest ambient operating
temperature where ESR is maximum.
±
maintain a capacitance range within 20% of nominal
over full operating ratings of temperature and voltage. Of
course, they are typically larger and more costly than Z5U/
Y5U types for a given voltage and capacitance.
Thermal Considerations
Thermal protection limits power dissipation in RT9183.
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 turns on
again after the junction temperature cools by 30°C.
Tantalum:
Solid tantalum capacitors are recommended for use on
the output because their typical ESR is very close to the
ideal value required for loop compensation. They also work
well as input capacitors if selected to meet the ESR
requirements previously listed.
For continuous operation, do not exceed absolute
maximum operation junction temperature 125°C. The
power dissipation definition in device is:
Tantalums also have good temperature stability: a good
quality tantalum will typically show a capacitance value
that varies less than 10~15% across the full temperature
range of 125°C to -40°C. ESR will vary only about 2X going
from the high to low temperature limits.
PD = (VIN − VOUT) x IOUT + VIN x IQ
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DS9183-12 March 2007
RT9183
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:
Good board layout practices must be used or instability
can be induced because of ground loops and voltage drops.
The input and output capacitors MUST be directly
connected to the input, output, and ground pins of the
device using traces which have no other currents flowing
through them.
PD(MAX) = ( TJ(MAX) - TA ) /θJA
The best way to do this is to layout CIN and COUT near the
device with short traces to the VIN, VOUT, and ground pins.
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.
The regulator ground pin should be connected to the
external circuit ground so that the regulator and its
capacitors have a“single point ground” .
For recommended operating conditions specification of
RT9183, 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-223 package
is 115°C/W, SOT-223 package (F-Type) is 135°C/W,
SOP-8 package is 125°C/W, and TO-263 package is
45°C/W on standard JEDEC 51-3 thermal test board.
It should be noted that stability problems have been seen
in applications where “ vias ” to an internal ground plane
were used at the ground points of the device and the input
and output capacitors. This was caused by varying ground
potentials at these nodes resulting from current flowing
through the ground plane. Using a single point ground
technique for the regulator and it's capacitors fixed the
problem. Since high current flows through the traces going
into VIN and coming from VOUT, Kelvin connect the capacitor
leads to these pins so there is no voltage drop in series
with the input and output capacitors.
The maximum power dissipation depends on operating
ambient temperature for fixedTJ(MAX) and thermal resistance
θJA. For RT9183 packages, the Figure 4 of derating curves
allows the designer to see the effect of rising ambient
temperature on the maximum power allowed.
Optimum performance can only be achieved when the
device is mounted on a PC board according to the diagram
below:
PCB Layout
2400
TO-263
2000
GND
1600
1200
SOT-223
SOP-8
800
+
ADJ
V
EN
SOT-223
400
(F-Type)
0
OUT
0
25
50
75
100
125
Ambient temperature (°C)
+
Figure 4
GND
V
IN
GND
SOP-8 Board Layout
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RT9183
Adjustable Operation
The adjustable version of the RT9183 has an output voltage
range of 0.8V to 4.5V. The output voltage is set by the
ratio of two external resistors as shown in Figure 2. The
value of R2 should be less than 80k to maintain regulation.
In critical applications, small voltage drop is caused by
the resistance (RT) of PC traces between the ground pin of
the device and the return pin of R2 (See Figure 5 shown on
next page).Note that the voltage drop across the external
PC trace will add to the output voltage of the device.
Optimum regulation will be obtained at the point where
the return pin of R2 is connected to the ground pin of the
device directly.
(SOP-8 & TO-263-5)
RT9183
V
VIN
EN
VOUT
V
OUT
IN
R
R
1
C
OUT
Enable
0.1uF
ADJ
GND
10uF
C
10uF
C
IN
2
R
T
Figure 5. Return Pin of External Resistor Connection
Referring to Figure 3 the fixed voltage versions for both
SOP-8 and TO-263-5 packages, the ADJ pin is the input
to the error amplifier and MUST be tied the ground pin of
the device directly otherwise it will be in the unstable state
if the pin voltage more than 0.1V with respect to the ground
pin itself.
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DS9183-12 March 2007
RT9183
Outline Dimension
D
D1
H
C
B
L
L1
e
e
A
A1
b
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
0.071
0.0047
0.031
0.146
0.287
0.264
0.124
0.093
0.013
0.077
0.013
A
A1
b
1.450
0.020
0.610
3.302
6.706
6.299
2.896
2.261
0.229
1.550
0.800
1.803
0.100
0.787
3.708
7.290
6.706
3.150
2.362
0.330
1.950
1.100
0.057
0.0008
0.024
0.130
0.264
0.248
0.114
0.089
0.009
0.061
0.009
B
C
D
D1
e
H
L
L1
3-Lead SOT-223 Surface Mount Package
DS9183-12 March 2007
www.richtek.com
13
RT9183
H
A
M
J
B
F
C
I
D
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
B
C
D
F
H
I
4.801
3.810
1.346
0.330
1.194
0.170
0.050
5.791
0.400
5.004
3.988
1.753
0.508
1.346
0.254
0.254
6.200
1.270
0.189
0.150
0.053
0.013
0.047
0.007
0.002
0.228
0.016
0.197
0.157
0.069
0.020
0.053
0.010
0.010
0.244
0.050
J
M
8-Lead SOP Plastic Package
www.richtek.com
14
DS9183-12 March 2007
RT9183
C
D
U
B
V
E
L1
b1
L2
e
b2
b
A
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
4.064
1.143
0.660
1.143
0.305
1.143
9.652
8.128
2.286
14.605
2.286
Max
4.826
1.676
0.914
1.397
0.584
1.397
10.668
9.652
2.794
15.875
2.794
Min
Max
A
B
0.160
0.045
0.026
0.045
0.012
0.045
0.380
0.320
0.090
0.575
0.090
0.190
0.066
0.036
0.055
0.023
0.055
0.420
0.380
0.110
0.625
0.110
b
b1
b2
C
D
E
e
L1
L2
U
6.223 Ref.
7.620 Ref.
0.245 Ref.
0.300 Ref.
V
3-Lead TO- 263 Surface Mount
DS9183-12 March 2007
www.richtek.com
15
RT9183
C
D
U
B
V
E
L1
L2
b
e
b2
A
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
4.064
1.143
0.660
0.305
1.143
9.652
8.128
1.524
14.605
2.286
Max
4.826
1.676
0.914
0.584
1.397
10.668
9.652
1.829
15.875
2.794
Min
Max
0.160
0.045
0.026
0.012
0.045
0.380
0.320
0.060
0.575
0.090
0.190
0.066
0.036
0.023
0.055
0.420
0.380
0.072
0.625
0.110
A
B
b
b2
C
D
E
e
L1
L2
U
V
6.223 Ref.
7.620 Ref.
0.245 Ref.
0.300 Ref.
5-Lead TO-263 Plastic Surface Mount 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
16
DS9183-12 March 2007
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