RT9080-12GQZ 概述
IC REG LINEAR 600MA 4-ZQFN
RT9080-12GQZ 数据手册
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RT9080
2μA IQ, 600mA Low-Dropout Linear Regulator
General Description
Features
2μA Ground Current at no Load
PSRR = 75dB at 1kHz
The RT9080 is a low-dropout (LDO) voltage regulators with
enable function that operates from 1.2V to 5.5V. It provides
up to 600mA of output current and offers low-power
operation in miniaturized packaging.
Adjustable Output Voltage Available by Specific
Application
2% Output Accuracy
The features of low quiescent current as low as 2μA and
almost zero disable current is ideal for powering the battery
equipment to a longer service life. The RT9080 is stable
with the ceramic output capacitor over its wide input range
from 1.2V to 5.5V and the entire range of output load
current (0mA to 600mA).
600mA (VIN ≥ 2.3V) Output Current with EN
Low (0.1μA) Disable Current
1.2V to 5.5V Operating Input Voltage
Dropout Voltage : 0.31V at 600mA when VOUT ≥ 3V
Support Fixed Output Voltage 0.8V to 3.3V
Stable with Ceramic or Tantalum Capacitor
Current-Limit Protection
Ordering Information
Over-Temperature Protection
RT9080/N-
TSOT-23-5 and ZQFN-4L 1x1 (ZDFN-4L 1x1) Packages
Available
Package Type
J5 : TSOT-23-5
QZ : ZQFN-4L 1x1 (Z-Type)
(ZDFN-4L 1x1)
Applications
Lead Plating System
G : Green (Halogen Free and Pb Free) Portable, Battery Powered Equipment
Ultra Low Power Microcontrollers
Notebook Computers
Output Voltage
08 : 0.8V
:
33 : 3.3V
Marking Information
Special Request : Any voltage between
0.8V and 3.3V under specific business
agreement
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Pin Function
RT9080 : Without SNS Pin
RT9080N : With SNS Pin
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.
Copyright 2017 Richtek Technology Corporation. All rights reserved.
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DS9080-05 June 2017
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1
RT9080
Pin Configuration
(TOP VIEW)
VOUT
SNS/NC
1
2
4
3
VOUT
GND
VIN
EN
5
4
SGND
2
3
5
VIN GND EN
TSOT-23-5
ZQFN-4L 1x1 (ZDFN-4L 1x1)
Functional Pin Description
Pin No.
Pin Name
Pin Function
TSOT-23-5 ZQFN-4L 1x1 (ZDFN-4L 1x1)
1
2
3
4
2
3
VIN
Supply voltage input.
GND
EN
Ground.
Enable control input.
SNS
NC
Output voltage sense. (RT9080N only)
No internal connection.
4
--
5
1
VOUT
SGND
Output of the regulator.
--
5 (Exposed Pad)
Substrate of chip. Leave floating or tie to GND.
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DS9080-05 June 2017
RT9080
Functional Block Diagram
VIN
VOUT
(without sense
function)
Current/Thermal
Sense
GND
SNS
(with sense
function)
R1
EN
R2
Bandgap
Reference
EN
Operation
Basic Operation
Enable
The RT9080 is a low quiescent current linear regulator
designed especially for low external components system.
The input voltage range is from 1.2V to 5.5V.
The RT9080 delivers the output power when it is set to
enable state. When it works in disable state, there is no
output power and the operation quiescent current is almost
zero.
The minimum required output capacitance for stable
operation is 1μF effective capacitance after consideration
of the temperature and voltage coefficient of the capacitor.
Current-Limit Protection
The RT9080 provides current limit function to prevent the
device from damages during over-load or shorted-circuit
condition. This current is detected by an internal sensing
transistor.
Output Transistor
The RT9080 builds in a P-MOSFET output transistor which
provides a low switch-on resistance for low dropout voltage
applications.
Over-Temperature Protection
The over-temperature protection function will turn off the
P-MOSFET when the junction temperature exceeds 150°C
(typ.), and the output current exceeds 80mA. Once the
junction temperature cools down by approximately 20°C,
the regulator will automatically resume operation.
Error Amplifier
The ErrorAmplifier compares the internal reference voltage
with the output feedback voltage from the internal divider,
and controls the Gate voltage of P-MOSFET to support
good line regulation and load regulation at output voltage.
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RT9080
Absolute Maximum Ratings (Note 1)
VIN, VOUT, SNS, EN to GND------------------------------------------------------------------------------------------- −0.3V to 6.5V
VOUT to VIN ---------------------------------------------------------------------------------------------------------------- −6.5V to 0.3V
Power Dissipation, PD @ TA = 25°C
TSOT-23-5 ------------------------------------------------------------------------------------------------------------------- 0.43W
ZQFN-4L 1x1 (ZDFN-4L 1x1)-------------------------------------------------------------------------------------------- 0.44W
Package Thermal Resistance (Note 2)
TSOT-23-5, θJA ------------------------------------------------------------------------------------------------------------- 230.6°C/W
TSOT-23-5, θJC ------------------------------------------------------------------------------------------------------------- 21.8°C/W
ZQFN-4L 1x1 (ZDFN-4L 1x1), θJA -------------------------------------------------------------------------------------- 226°C/W
ZQFN-4L 1x1 (ZDFN-4L 1x1), θJC ------------------------------------------------------------------------------------- 43°C/W
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 Model)---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ------------------------------------------------------------------------------------------------------ 150V
Recommended Operating Conditions (Note 4)
Input Voltage, VIN --------------------------------------------------------------------------------------------------------- 1.2V to 5.5V
Junction Temperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range-------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VOUT + 1 < VIN < 5.5V, TA = 25°C, unless otherwise specified)
Parameter
Output Voltage Range
DC Output Accuracy
Symbol
Test Conditions
Min
0.8
2
--
Typ
--
Max
3.3
Unit
V
VOUT
ILOAD = 1mA
--
2
%
0.8V VOUT 1.05V (TSOT-23-5)
0.8V VOUT 1.05V (ZQFN-4L 1x1)
1.05V VOUT 1.2V
1.2V VOUT 1.5V
1.05
1.05
0.8
1.33
1.63
1.13
1.03
0.93
0.83
0.73
0.63
0.53
--
--
--
0.71
0.57
0.57
0.41
0.36
0.31
Dropout Voltage
(ILOAD = 600mA) (Note 5)
VDROP
1.5V VOUT 1.8V
--
V
1.8V VOUT 2.1V
--
2.1V VOUT 2.5V
--
2.5V VOUT 3V
--
3V VOUT
--
ILOAD = 0mA, VOUT 5.5V
VIN VOUT + VDROP
VCC Consumption Current
IQ
--
--
--
2
4
A
A
A
Shutdown GND Current
(Note 6)
VEN = 0V
0.1
0.1
0.5
0.5
Shutdown Leakage Current
(Note 6)
VEN = 0V, VOUT = 0V
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DS9080-05 June 2017
RT9080
Parameter
EN Input Current
Symbol
Test Conditions
VEN = 5.5V
Min
--
Typ
--
Max
0.1
0.6
Unit
IEN
A
1.2V VIN 1.5V
1.5V VIN 1.8V
1.8V VIN 5.5V
--
0.3
0.15
Line Regulation
LINE
ILOAD = 1mA
--
0.3
%
--
0.13 0.35
Load Regulation
LOAD
1mA < ILOAD < 600mA
--
0.5
75
1
%
Power Supply Rejection
Ratio
VIN = 3V, ILOAD = 50mA,
COUT = 1F, VOUT = 2.5V, f = 1kHz
PSRR
--
--
dB
VOUT = 0.8V
--
--
--
--
26
37
39
42
--
--
C
OUT = 1F,
ILOAD = 150mA,
BW = 10Hz to
100kHz,
VOUT = 1.2V
VOUT = 1.8V
VOUT = 3.3V
Output Voltage Noise
VRMS
--
VIN = VOUT + 1V
--
Output Current Limit
ILIM
VIH
VIL
VOUT = 90%VOUT(Normal)
VIN = 5V
610 1100
--
mA
V
Logic-High
Logic-Low
0.9
--
--
--
--
Enable Input
Voltage
VIN = 5V
0.4
Thermal Shutdown
Temperature
TSD
ILOAD = 30mA, VIN 1.5V
--
150
--
C
Thermal Shutdown
Hysteresis
TSD
--
--
20
80
--
--
C
Discharge Resistance
EN = 0V, VOUT = 0.1V
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and 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 may
affect device reliability.
Note 2. θJA is measured in the natural convection at TA = 25°C on a two-layer Richtek Evaluation Board for ZQFN-4L 1x1 (ZDFN-
4L1x1) Package.
θ
JA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7 for TSOT-23-
5 Package.
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. The dropout voltage is defined as VIN − VOUT, when VOUT is 98% of the normal value of VOUT
Note 6. The specification is tested at wafer stage and guarantee by design after assembly.
.
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RT9080
Typical Application Circuit
RT9080N
V
IN
VIN
EN
VOUT
SNS
V
OUT
C
1µF
C
IN
OUT
(Effective Capacitance 1µF)
EN
GND
Figure 1. Application with Sense Function
RT9080
V
IN
VIN
EN
VOUT
V
OUT
C
1µF
C
IN
OUT
(Effective Capacitance 1µF)
EN
GND
Figure 2. Application without Sense Function
RT9080N
V
VIN
IN
VOUT
SNS
V
OUT
C
1µF
IN
C
NC
R1
R2
OUT
(Effective Capacitance 1µF)
EN
EN
GND
Figure 3. Adjustable Output Voltage Application Circuit
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DS9080-05 June 2017
RT9080
Typical Operating Characteristics
Output Voltage vs. Temperature
Output Voltage vs. Temperature
0.90
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
0.88
0.86
0.84
0.82
VIN = 3.8V
VIN = 4.5V
0.80
VIN = 1.2V
VIN = 5.5V
0.78
VIN = 2.1V
VIN = 5.5V
0.76
0.74
0.72
0.70
VOUT = 0.8V, ILOAD = 1mA
50 75 100 125
VOUT = 3.3V, ILOAD = 1mA
-50
-25
0
25
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Output Voltage vs. Input Voltage
Output Voltage vs. Load Current
0.90
0.88
0.86
0.84
0.82
0.80
0.78
0.76
0.74
0.72
0.70
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
VIN = 3V
VIN = 5V
VOUT = 0.8V, ILOAD = 1mA
3.78 4.64 5.5
ILOAD = 0mA to 600mA
1.2
2.06
2.92
0
50 100 150 200 250 300 350 400 450 500 550 600
Load Current (mA)
Input Voltage (V)
Ground Current vs. Load Current
Ground Current vs. Load Current
500
450
400
350
300
250
200
150
100
50
900
800
700
600
500
400
300
200
100
0
TA = 65°C
TA = 25°C
TA = −40°C
TA = 65°C
TA = 25°C
TA = −40°C
VIN = 4.3V, VOUT = 3.3V
VIN = 2.2V, VOUT = 0.8V
100 1000
0
1
10
1
10
100
1000
Load Current (mA)
Load Current (mA)
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RT9080
Shutdown Current vs. Input Voltage
Shutdown Leakage Current vs. Temperature
0.045
0.10
0.08
0.06
0.04
0.02
0.00
VOUT = 0.8V, EN = 0V
VOUT = 0.8V, EN = 0V
0.040
0.035
0.030
0.025
0.020
0.015
0.010
0.005
0.000
VIN = 1.8V
VIN = 5.5V
1
2
3
4
5
6
-50
-50
-50
-25
0
25
50
75
100
125
Temperature (°C)
Input Voltage (V)
Enable Threshold vs. Input Voltage
Enable Threshold vs. Temperature
0.68
0.67
0.66
0.65
0.64
0.63
0.62
0.61
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
Enable High
Enable High
Enable Low
Enable Low
VIN = 5.5V
100 125
-25
0
25
50
75
1
2
3
4
5
6
Input Voltage (V)
Temperature (°C)
Dropout Voltage vs. Temperature
Current Limit vs. Temperature
500
450
400
350
300
250
200
150
100
50
1200
1000
800
600
400
200
0
ILOAD = 1mA
ILOAD = 400mA
VOUT = 3.3V
VOUT = 0.8V
VOUT = 3.3V
ILOAD = 10mA ILOAD = 500mA
ILOAD = 100mA ILOAD = 600mA
ILOAD = 200mA
I
LOAD = 300mA
VIN = 5V
100 125
0
-50
-25
0
25
50
75
100
125
-25
0
25
50
75
Temperature (°C)
Temperature (°C )
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DS9080-05 June 2017
RT9080
Fold-Back Current Limit vs. Temperature
SNS Input Current vs. Temperature
1400
1200
1000
800
600
400
200
0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
VOUT = 3.3V
VOUT = 0.8V
VIN = 5V
VIN = 5V, VOUT = 0.8V, EN = 3V
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Temperature (°C )
Temperature (°C)
Power Off from EN
Power On from EN
EN
(2V/Div)
EN
(2V/Div)
VOUT
(2V/Div)
VOUT
(2V/Div)
ILOAD
(200mA/Div)
ILOAD
(200mA/Div)
VIN = 4V, VOUT = 3.3V, ILOAD = 600mA
VIN = 4V, VOUT = 3.3V, ILOAD = 600mA
Time (500μs/Div)
Time (500μs/Div)
Line Transient
Load Transient
VIN = 2.8V to 3.8V, VOUT = 1.8V, ILOAD = 1mA
VIN = 1.8V, VOUT = 0.8V, ILOAD = 1mA to 600mA
ILOAD
(200mA/Div)
VIN
(1V/Div)
VOUT
(2mV/Div)
VOUT
(20mV/Div)
Time (250μs/Div)
Time (100μs/Div)
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RT9080
PSRR vs. Frequency
PSRR vs. Frequency
0
-20
-40
-60
-80
0
-20
ILOAD = 50mA
LOAD = 30mA
LOAD = 15mA
I
I
-40
ILOAD = 150mA
ILOAD = 50mA
LOAD = 15mA
ILOAD = 10mA
I
-60
-80
VIN = 2.8V, VOUT = 0.8V, COUT = 1μF
1000 10000 100000 1000000
VIN = 3.3V, VOUT = 2.8V, COUT = 1μF
1000 10000 100000 1000000
-100
10
-100
100
10
100
Frequency (Hz)
Frequency (Hz)
Output Noise
Output Noise
500
400
300
200
100
0
500
400
300
200
100
0
-100
-200
-300
-400
-500
-100
-200
-300
-400
-500
VIN = 4.5V, VOUT = 3.3V, ILOAD = 600mA,
OUT = 1μF, Frequency = 10Hz to 100kHz
VIN = 1.8V, VOUT = 0.8V, ILOAD = 600mA,
OUT = 1μF, Frequency = 10Hz to 100kHz
C
C
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
sec (m)
sec (m)
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DS9080-05 June 2017
RT9080
Application Information
adjustable output voltage will be set to around 3.35V. Its
temperature coefficient in Figure 4 is still perfect in such
kind of application.
Like any low dropout linear regulator, the RT9080's external
input and output capacitors must be properly selected for
stability and performance. Use a 1μF or larger input
capacitor and place it close to the IC's VINandGNDpins.
Any output capacitor meeting the minimum 1mΩ ESR
(Equivalent Series Resistance) and effective capacitance
larger than 1μF requirement may be used. Place the output
capacitor close to the IC's VOUT andGNDpins. Increasing
capacitance and decreasing ESR can improve the circuit's
PSRR and line transient response.
Output Voltage vs. Temperature
3.35
3.34
3.33
3.32
3.31
3.30
3.29
Enable
The RT9080 has an EN pin to turn on or turn off the
regulator, When the EN pin is in logic high, the regulator
will be turned on. The shutdown current is almost 0μA
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.
ILOAD = 1mA
75 100 125
3.28
-50
-25
0
25
50
Temperature (°C)
Figure 4. Temperature Coefficient ofAdjustable Output
Voltage
Adjustable Output Voltage Setting
The minimum recommended 50μA in the resistor divider
makes the application no longer an ultra low quiescent
LDO. Figure 5 is another fine adjustable output voltage
application can keep the LDO still operating in low power
consumption. The fine tune range is recommended to be
less than 50mV (R1 ≤ 91kΩ) in order to keep a good
temperature coefficient of the output voltage.
Because of the small input current at the SNS pin, the
RT9080N with SNS pin also can work as an adjustable
output voltage LDO. Figure 3 gives the connections for
the adjustable output voltage application. The resistor
divider from VOUT to SNS sets the output voltage when
in regulation.
The voltage on the SNS pin sets the output voltage and is
determined by the values of R1 and R2. In order to keep
a good temperature coefficient of output voltage, the values
of R1 and R2 should be selected carefully to ignore the
temperature coefficient of input current at the SNS pin. A
current greater than 50μA in the resistor divider is
recommended to meet the above requirement. The
adjustable output voltage can be calculated using the
formula given in equation 1 :
RT9080N
VIN
EN
VOUT
SNS
1µF
R1
1µF
56pF/NC
GND
Figure 5. Fine Adjustable Output Voltage Application
Circuit
R1 + R2
There isn't extra current consumption in the above
application. But the temperature coefficient of output
voltage will be degraded by the input current at SNS pin.
If the tuning range is larger than 50mV, a compensation
capacitor (56pF) is required to keep the stability of output
voltage. The fine adjustable output voltage is calculated
using the formula given in equation2 :
VOUT
VSNS
(1)
R2
where VSNS is determined by the output voltage selections
in the ordering information of RT9080N. The maximum
adjustable output voltage can be as high as input voltage
deducted by the dropout voltage.
When we choose 51kΩ and 16kΩ as R1 and R2
VOUT VSNS + ISNS R1
(2)
respectively, and select a 0.8V output at SNS pin, the
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RT9080
where ISNS is the input Current at SNS pin (typical 550nA
at room temperature) and VSNS is determined by the
output voltage selections in the ordering information of
the RT9080N.
The maximum power dissipation depends on the operating
ambient temperature for fixed TJ(MAX) and thermal
resistance, θJA. The derating curve in Figure 6 allows the
designer to see the effect of rising ambient temperature
on the maximum power dissipation.
Current Limit
0.6
Four-Layer PCB for TSOT-23-5 package
The RT9080 contains an independent current limiter, which
monitors and controls the pass transistor's gate voltage,
limiting the output current to 1.1A (typ.). The current
limiting level is reduced to around 0.6A named fold-back
current limit when the output voltage is further decreased.
The output can be shorted to ground indefinitely without
damaging the part.
Two-Layer Richtek EVB for ZQFN (ZDFN)-4L 1x1
package
0.5
0.4
0.3
ZQFN-4L 1x1 (ZDFN-4L 1x1)
TSOT-23-5
0.2
0.1
0.0
Thermal Considerations
For continuous operation, do not exceed absolute
maximum junction temperature. The maximum power
dissipation depends on the thermal resistance of the IC
package, PCB layout, rate of surrounding airflow, and
difference between junction and ambient temperature. The
maximum power dissipation can be calculated by the
following formula :
0
25
50
75
100
125
Ambient Temperature (°C)
Figure 6. Derating Curve of Maximum PowerDissipation
PD(MAX) = (TJ(MAX) − TA) / θJA
where TJ(MAX) is the maximum junction temperature, TA is
the ambient temperature, and θJA is the junction to ambient
thermal resistance.
For recommended operating condition specifications the
maximum junction temperature is 125°C and TA is the
ambient temperature. The junction to ambient thermal
resistance, θJA, is layout dependent. For TSOT-23-5
package, the thermal resistance, θJA, is 230.6°C/W on a
standard JEDEC 51-7 four-layer thermal test board. For
ZQFN-4L 1x1 (ZDFN-4L 1x1) package, the thermal
resistance, θJA, is 226°C/W on a two-layer Richtek
evaluation board. The maximum power dissipation at TA =
25°C can be calculated by the following formula :
PD(MAX) = (125°C − 25°C) / (230.6°C/W) = 0.43W for
TSOT-23-5 package
PD(MAX) = (125°C − 25°C) / (226°C/W) = 0.44W for
ZQFN-4L 1x1 (ZDFN-4L 1x1) package
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DS9080-05 June 2017
RT9080
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
0.700
0.000
1.397
0.300
2.591
2.692
0.838
0.080
0.300
1.000
0.100
1.803
0.559
3.000
3.099
1.041
0.254
0.610
0.028
0.000
0.055
0.012
0.102
0.106
0.033
0.003
0.012
0.039
0.004
0.071
0.022
0.118
0.122
0.041
0.010
0.024
b
C
D
e
H
L
TSOT-23-5 Surface Mount Package
Copyright 2017 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9080-05 June 2017
www.richtek.com
13
RT9080
1
2
1
2
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.
0.300
0.000
0.117
0.175
0.900
0.450
0.900
0.450
Max.
0.400
0.050
0.162
0.275
1.100
0.550
1.100
0.550
Min.
0.012
0.000
0.005
0.007
0.035
0.018
0.035
0.018
Max.
0.016
0.002
0.006
0.011
0.043
0.022
0.043
0.022
A
A1
A3
b
D
D2
E
E2
e
0.625
0.025
L
0.200
0.300
0.008
0.012
H
0.039
0.064
0.002
0.003
H1
Z-Type 4L QFN 1x1 Package
Richtek Technology Corporation
14F, No. 8, Tai Yuen 1st Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789
Richtek products are sold by description only. Customers should obtain the latest relevant information and data sheets before placing orders and should verify
that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek
product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use;
nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent
or patent rights of Richtek or its subsidiaries.
www.richtek.com
14
DS9080-05 June 2017
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