RICHTEK RT9183H-33CS

RT9183
Ultra Low Dropout 1.5A Linear Regulator
General Description
Features
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.
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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 overtemperature protection. The adjustable version has enable
pin to reduce power consumption in shutdown mode.
The devices are available in fixed output voltages of 1.2V
to 3.3V with 0.1V per step 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, TO-252 and fused SOP-8 packages with two
external resistors to set the output voltage ranges from
0.8V to 4.5V.
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330mV Dropout @ 1.5A
380uA Low Ground Pin Current
Excellent Line and Load Regulation
0.1uA Quiescent Current in Shutdown Mode
Guaranteed 1.5A Output Current
Fixed Output Voltages : 1.2V to 3.3V
Adjustable Output Voltage from 0.8V to 4.5V
Over-Temperature/Over-Current Protection
RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9183 -
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commercial Standard)
Applications
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Package Type
G : SOT-223
GF : SOT-223 (F-Type)
S : SOP-8
L: TO-252
LF : TO-252 (F-Type)
M : TO-263
M5 : TO-263-5
Battery-Powered Equipment
Mother Board/Graphic Card
Peripheral Cards
PCMCIA Card
Output Voltage
Defauit : Adjustable
12 : 1.2V
13 : 1.3V
:
32 : 3.2V
33 : 3.3V
Only for SOP-8 and TO-263-5
H : Chip Enable High
L : Chip Enable Low
Note :
Richtek Pb-free and Green products are :
`RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
`Suitable for use in SnPb or Pb-free soldering processes.
`100%matte tin (Sn) plating.
DS9183-14 April 2008
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1
RT9183
Pin Configurations
(TOP VIEW)
1
2
VIN
GND
(TAB)
3
VOUT
SOT-223
EN
1
2
3
GND
VOUT
(TAB)
1
8
GND
2
7
GND
VOUT
3
6
GND
ADJ
4
5
GND
1
2
3
1
GND
(TAB)
VIN
VOUT
VIN
SOT-223 (F-Type)
VIN
2
1
2
3
4
3
VOUT
(TAB)
GND
TO-252
3
2
VIN
TO-252 (F-Type)
5
SOP-8
EN VIN
VOUT ADJ
GND(TAB)
VIN
VOUT
GND(TAB)
TO-263-5
TO-263
Typical Application Circuit
(SOT-223 & TO-263 & TO-252)
VIN
VIN = 3.3V
RT9183
VOUT
VOUT
2.5V, 1.5A
GND
CIN
COUT
10uF
10uF
Figure 1. 3.3V to 2.5V Regulator
(SOP-8 & TO-263-5)
VIN
VIN
RT9183
VOUT
VOUT
R1
Enable
C
0.1uF
CIN
10uF
EN
GND
VOUT = 0.8 × (1 +
COUT
ADJ
R2
R1
)Volts
R2
10uF
Note: The value of R2 should be less
than 80k to maintain
regulation.
Figure 2. Adjustable Operation
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2
DS9183-14 April 2008
RT9183
(SOP-8 & TO-263-5)
VIN
Enable
C
0.1uF
CIN
10uF
VIN
RT9183
VOUT
EN
GND ADJ
VOUT
COUT
10uF
Figure 3. Fixed Operation with SOP-8 and TO-263-5 packages
Functional Pin Description
Pin Name
EN
Pin Function
Chip Enable Control Input.
Note that the device will be in the unstable state if the pin is not connected.
VIN
Supply Input.
GND
Common Ground.
VOUT
Regulator Output.
The output voltage is set by the internal feedback resistors when this pin
ADJ
grounded. If external feedback resistors are applied, the output voltage will be:
VOUT = 0.8 × (1 + R1 ) Volts
R2
Function Block Diagram
VIN
Current Limit
Sensor
+
0.8V
Reference
Error
Amplifier
-
+
VOUT
EN
Shutdown
Logic
Thermal
Shutdown
ADJ
+
Output Mode
Comparator
DS9183-14 April 2008
100mV
GND
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3
RT9183
Absolute Maximum Ratings
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(Note 1)
Supply Input Voltage -----------------------------------------------------------------------------------------------------Package Thermal Resistance
SOT-223, θJA ---------------------------------------------------------------------------------------------------------------SOT-223, θJC --------------------------------------------------------------------------------------------------------------SOT-223 (F-Type), θJA ---------------------------------------------------------------------------------------------------SOT-223 (F-Type), θJC ---------------------------------------------------------------------------------------------------SOP-8, θJA -----------------------------------------------------------------------------------------------------------------SOP-8, θJC -----------------------------------------------------------------------------------------------------------------TO-252, θJA ----------------------------------------------------------------------------------------------------------------TO-252, θJC ----------------------------------------------------------------------------------------------------------------TO-252 (F-Type), θJA -----------------------------------------------------------------------------------------------------TO-252 (F-Type), θJC -----------------------------------------------------------------------------------------------------TO-263, θJA ----------------------------------------------------------------------------------------------------------------TO-263, θJC ----------------------------------------------------------------------------------------------------------------Power Dissipation, PD@TA = 25°C
SOT-223 --------------------------------------------------------------------------------------------------------------------SOT-223 (F-Type) ---------------------------------------------------------------------------------------------------------SOP-8 -----------------------------------------------------------------------------------------------------------------------TO-252 ----------------------------------------------------------------------------------------------------------------------TO-252 (F-Type) ----------------------------------------------------------------------------------------------------------TO-263 ----------------------------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 2)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------MM (Machine Mode) ------------------------------------------------------------------------------------------------------
Recommended Operating Conditions
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6V
115°C/W
15°C/W
135°C/W
17°C/W
125°C/W
20°C/W
68°C/W
8°C/W
75°C/W
15°C/W
45°C/W
8°C/W
0.87W
0.74W
0.8W
1.471W
1.333W
2.22W
260°C
150°C
−65°C to 150°C
2kV
200V
(Note 3)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.3V to 5.5V
Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
Electrical Characteristics
(VIN = VOUT + 0.7V, CIN =COUT = 10uF (Ceramic), TA = 25°C unless otherwise specified)
Parameter
Output Voltage Accuracy
(Fixed Output Voltage)
Symbol
ΔVOUT
Test Conditions
IOUT = 10mA
Min
Typ
Max
Units
−2
0
+2
%
0.8
--
4.5
V
Output Voltage Range (Adjustable)
VOUT_ADJ
Quiescent Current
IQ
IOUT = 0mA, Enable
--
380
500
uA
ISTBY
VIN = 5.5V, Shutdown
--
0.1
1
uA
Standby Current
(Note 6)
(Note 7)
To be continued
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DS9183-14 April 2008
RT9183
Parameter
Current Limit
Symbol
Test Conditions
Min
Typ
Max
Units
2
3.2
4.2
A
IOUT = 0.5A
--
110
300
IOUT = 1.0A
--
220
400
IOUT = 1.5A
--
330
500
--
0.035
0.18
%/V
--
22
45
mV
ILIM
Dropout Voltage
(Note 4)
VDROP
ΔVLINE
Line Regulation
Load Regulation
(Note 5)
(Fixed Output Voltage)
ΔVLOAD
VOUT + 0.7V < VIN < 5.5V
IOUT = 10mA
1mA < IOUT < 1.5A
mV
Thermal Shutdown Temperature
TSD
--
170
--
°C
Thermal Shutdown Hysteresis
ΔTSD
--
30
--
°C
EN Threshold
Logic-Low Voltage
VIL
VIN = 5.5V
--
--
0.6
Logic-High Voltage
VIH
VIN = 5.5V
1.8
--
--
IEN
VIN = 5.5V, Enable
--
0.1
1
uA
0.784
0.8
0.816
V
--
10
100
nA
0.05
0.1
0.2
V
Enable Pin Current
V
ADJ
Reference Voltage Tolerance
VREF
Adjust Pin Current
IADJ
Adjust Pin Threshold
VTH(ADJ)
VADJ = VREF
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 is 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 copper area of PCB
layout is 4mm x 2.5mm on SOT-223, 10mm x 10mm on TO-252, 14mm x 14mm on TO-263 for thermal
measurement.
DS9183-14 April 2008
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RT9183
Typical Operating Characteristics
Output Voltage vs. Temperature
Output Voltage vs. Temperature
2.6
VIN = 5V, RL = ∞
CIN = COUT = 10uF (Ceramic,Y5V)
1.85
Output Voltage (V)
Output Voltage (V)
1.9
1.8
1.75
VIN = 5V, RL = ∞
CIN = COUT = 10uF (Ceramic,Y5V)
2.55
2.5
2.45
RT9183H-18xS
RT9183-25xG
2.4
1.7
-50
-25
0
25
50
75
100
-50
125
-25
0
75
100
125
400
Quiescent Current (uA) 1
Quiescent Current (uA) 1
50
Quiescent Current vs. Temperature
Quiescent Current vs. Temperature
400
380
360
340
VIN = 5V, RL = ∞
CIN = COUT = 10uF
(Ceramic,Y5V)
320
380
360
340
VIN = 5V, RL = ∞
CIN = COUT = 10uF
(Ceramic,Y5V)
320
RT9183H-18xS
300
RT9183-25xG
300
-50
-25
0
25
50
75
100
125
-50
-25
0
Temperature (°C)
25
50
75
100
125
Temperature (°C)
Current Limit vs. Temperature
Current Limit vs. Temperature
4
4
VIN = 5V, CIN = COUT = 10uF(Ceramic,Y5V)
VIN = 5V, CIN = COUT = 10uF(Ceramic,Y5V)
3.8
Current Limit (A)
3.8
Current Limit (A)
25
Temperature (°C)
Temperature (°C)
3.6
3.4
3.2
3.6
3.4
3.2
RT9183L-33xM5
RT9183-25xG
3
3
-50
-25
0
25
50
75
Temperature (°C)
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100
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
DS9183-14 April 2008
RT9183
Dropout vs.
Voltage
Dropout Voltage
Load Current
Dropout Voltage
Load Current
Dropoutvs.
Voltage
500
500
Dropout Voltage (mV)
Dropout Voltage (mV) 1
TJ = 125°C
TJ = 125°C
400
300
TJ = +25°C
200
TJ = -40°C
100
400
300
TJ = +25°C
200
TJ = -40°C
100
RT9183-25xG
RT9183L-33xM5
0
0
0.6
0.9
1.2
0
1.5
0.3
0.6
0.9
1.2
Load Current (A)
Load Current (A)
Dropout Voltage vs. Load Current
Load Transient Response
RT9183H-xS
VOUT = 3.3V
1.5
COUT = 47uF/Low ESR, ILOAD = 1mA to 750mA
TJ= 125°C
300
TJ= 25°C
1
0.5
0
200
TJ= -40°C
100
Output Voltage
Deviation(mV)
Dropout Voltage (mV)
400
0.3
Load
Current (A)
0
20
0
-20
RT9183H-18xS
0
0
0.3
0.6
0.9
1.2
1.5
Time (100us/Div)
Load Current (A)
Load Transient Regulation
Load
Current (A)
COUT = 47uF/Low ESR, ILOAD = 1mA to 1.5A
2
1
0
Output Voltage
Deviation(mV)
Load Transient Response
RT9183-12xGF
20
0
0
-50
RT9183H-18xS
Time (100us/Div)
DS9183-14 April 2008
Load Current (mA)
Output Voltage
Deviation(mV)
50
500
0
ILOAD = 1mA to 750mA
COUT = 47uF/Low ESR
Time (100us/Div)
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RT9183
Line Transient Response
COUT = 47uF/Low ESR
5
COUT = 47uF/Low ESR, ILOAD = 100mA
5
4
4
Output Voltage
Deviation(mV)
Output Voltage
Deviation(mV)
Input Voltage
Deviation(V)
ILOAD = 100mA
Input Voltage
Deviation(V)
Line Transient Regulation
10
0
10
0
-10
RT9183H-18xS
RT9183-12xGF
Time (100us/Div)
Time (100us/Div)
EN Pin
PinShutdown
ThresholdThreshold
Voltage vs.
EN
vs. Temperature
EN Pin Shutdown Response
EN
Voltage (V)
CIN = COUT = 10uF (Ceramic,Y5V)
1
VOUT Off to On
ILOAD = 100mA, VIN = 5V, TA =25°C
5
0
0.9
Output
Voltage (V)
EN Pin Threshold Voltage
Shutdown
Voltage (V)
(V) 1
1.1
VOUT On to Off
0.8
RT9183L-33xM5
2
1
0
RT9183H-18xS
0.7
-50
-25
0
25
50
75
100
125
Temperature (°C)
Time (500us/Div)
Reference Voltage vs. Temperature
0.85
Reference Voltage (V)
VIN = 5V,CIN = COUT = 10uF (Electrolysis)
0.83
0.81
0.79
0.77
RT9183H-xS
0.75
-50
-25
0
25
50
75
100
125
Temperature (°C)
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DS9183-14 April 2008
RT9183
Application Information
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.
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). A lower
ESR capacitor allows the use of less capacitance, while
higher ESR type (like aluminum electrolytic) require more
capacitance.
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.
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.
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 and GND for
transient stability, but it may be increased without limit.
Higher capacitance values help to improve transient.
The output capacitor's ESR is critical because it forms a
zero to provide phase lead which is required for loop
stability.
DS9183-14 April 2008
No Load Stability
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 :
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.
Short-Circuit Protection
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.
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.
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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.
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.
Z5U and Y5V dielectric ceramics have capacitance that
drops severely with applied voltage. A typical 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.
X7R and X5R dielectric ceramic capacitors are strongly
recommended if ceramics are used, as they typically
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.
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.
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.
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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.
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.
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.
Any applications using aluminum electrolytics should be
thoroughly tested at the lowest ambient operating
temperature where ESR is maximum.
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.
For continuous operation, do not exceed absolute
maximum operation junction temperature 125°C. The
power dissipation definition in device is :
PD = (VIN − VOUT) x IOUT + VIN x IQ
DS9183-14 April 2008
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:
PD(MAX) = ( TJ(MAX) - TA ) /θJA
Where T J(MAX) is the maximum operation junction
temperature 125°C, TA is the ambient temperature and
the θJA is the junction to ambient thermal resistance.
For recommended operating conditions specification of
RT9183, where T J(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, TO-252 package is 68°C/
W, TO-252 package (F-Type) is 75°C/W and TO-263
package is 45°C/W on standard JEDEC 51-3 thermal test
board.
Maximum power dissipation (mW)
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(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.
2400
2000
1600
PCB Layout
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.
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.
The regulator ground pin should be connected to the
external circuit ground so that the regulator and its
capacitors have a“single point ground” .
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.
Optimum performance can only be achieved when the
device is mounted on a PC board according to the diagram
below :
TO-263
GND
TO-252
(F-Type)
TO-252
1200
SOT-223
800
400
ADJ
+
SOT-223
(F-Type)
EN
SOP-8
VOUT
0
0
25
50
75
100
125
+
Ambient temperature (°C)
(℃ )
+
Figure 4
GND
VIN
GND
SOP-8 Board Layout
DS9183-14 April 2008
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11
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)
VIN
VIN
RT9183
VOUT
EN
ADJ
VOUT
R1
Enable
C
0.1uF
CIN
10uF
GND
RT
R2
COUT
10uF
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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12
DS9183-14 April 2008
RT9183
Outline Dimension
D
D1
H
C
B
L
e
L1
e
A
A1
b
Symbol
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
A
1.450
1.803
0.057
0.071
A1
0.020
0.100
0.0008
0.0047
b
0.610
0.787
0.024
0.031
B
3.302
3.708
0.130
0.146
C
6.706
7.290
0.264
0.287
D
6.299
6.706
0.248
0.264
D1
2.896
3.150
0.114
0.124
e
2.261
2.362
0.089
0.093
H
0.229
0.330
0.009
0.013
L
1.550
1.950
0.061
0.077
L1
0.800
1.100
0.009
0.013
3-Lead SOT-223 Surface Mount Package
DS9183-14 April 2008
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
4.801
5.004
0.189
0.197
B
3.810
3.988
0.150
0.157
C
1.346
1.753
0.053
0.069
D
0.330
0.508
0.013
0.020
F
1.194
1.346
0.047
0.053
H
0.170
0.254
0.007
0.010
I
0.050
0.254
0.002
0.010
J
5.791
6.200
0.228
0.244
M
0.400
1.270
0.016
0.050
8-Lead SOP Plastic Package
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14
DS9183-14 April 2008
RT9183
D
U
C
D1
R
B
T
V
E
S
L1
L3
b1
b
L2
e
b2
A
Symbol
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
A
2.184
2.388
0.086
0.094
B
0.889
2.032
0.035
0.080
b
0.508
0.889
0.020
0.035
b1
1.016 Ref.
0.040 Ref.
b2
0.457
0.584
0.018
0.023
C
0.457
0.584
0.018
0.023
D
6.350
6.731
0.250
0.265
D1
5.207
5.461
0.205
0.215
E
5.334
6.223
0.210
0.245
e
2.108
2.438
0.083
0.096
L1
9.398
10.414
0.370
0.410
L2
L3
0.508 Ref.
0.635
1.016
0.020 Ref.
0.025
0.040
U
3.810 Ref.
0.150 Ref.
V
3.048 Ref.
0.120 Ref.
R
0.200
0.850
0.008
0.033
S
2.500
3.400
0.098
0.134
T
0.500
0.850
0.020
0.033
3-Lead TO-252 Surface Mount Package
DS9183-14 April 2008
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15
RT9183
C
D
U
B
V
E
L1
b1
L2
e
b2
b
A
Symbol
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
A
4.064
4.826
0.160
0.190
B
1.143
1.676
0.045
0.066
b
0.660
0.914
0.026
0.036
b1
1.143
1.397
0.045
0.055
b2
0.305
0.584
0.012
0.023
C
1.143
1.397
0.045
0.055
D
9.652
10.668
0.380
0.420
E
8.128
9.652
0.320
0.380
e
2.286
2.794
0.090
0.110
L1
14.605
15.875
0.575
0.625
L2
2.286
2.794
0.090
0.110
U
6.223 Ref.
0.245 Ref.
V
7.620 Ref.
0.300 Ref.
3-Lead TO- 263 Surface Mount
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16
DS9183-14 April 2008
RT9183
C
D
U
B
V
E
L1
L2
b
e
b2
A
Dimensions In Millimeters
Symbol
Dimensions In Inches
Min
Max
Min
Max
A
4.064
4.826
0.160
0.190
B
1.143
1.676
0.045
0.066
b
0.660
0.914
0.026
0.036
b2
0.305
0.584
0.012
0.023
C
1.143
1.397
0.045
0.055
D
9.652
10.668
0.380
0.420
E
8.128
9.652
0.320
0.380
e
1.524
1.829
0.060
0.072
L1
14.605
15.875
0.575
0.625
L2
2.286
2.794
0.090
0.110
U
6.223 Ref.
0.245 Ref.
V
7.620 Ref.
0.300 Ref.
5-Lead TO-263 Plastic Surface Mount Package
Richtek Technology Corporation
Richtek Technology Corporation
Headquarter
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
8F, No. 137, Lane 235, Paochiao Road, Hsintien City
Hsinchu, Taiwan, R.O.C.
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)89191466 Fax: (8862)89191465
Email: [email protected]
DS9183-14 April 2008
www.richtek.com
17