RT9055-NNWSC [RICHTEK]
IC REG LINEAR 2.85V/2.85V 6WLCSP;
| 型号： | RT9055-NNWSC |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | IC REG LINEAR 2.85V/2.85V 6WLCSP |
| 文件： | 总9页 (文件大小：175K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
RT9055
300mA Dual LDO Regulator
General Description
Features
Wide Operating Voltage Range : 1.5V to 5.5V
The RT9055 is a dual channel, low noise, and low dropout
regulator sourcing up to 300mAat each channel. The output
voltage range is from 0.9V to 3.5V with an input voltage
range from 1.5V to 5.5V.
Low Noise for RF Application
No Noise Bypass Capacitor Required
Fast Response in Line/Load Transient
TTL Logic Controlled Shutdown Input
Low Temperature Coefficient
The RT9055 offers 2% accuracy, extremely low dropout
voltage and extremely low quiescent current (only 29μA
per LDO). The shutdown current is near zero which is
suitable for battery powered applications. The RT9055 also
provides protection functions such as current limiting,
output short circuit protection, and over temperature
protection.
Dual LDO Outputs (300mA/300mA)
Ultra-Low Quiescent Current : 29μA/LDO
High Output Accuracy 2%
Short Current Protection
Thermal Shutdown Protection
Current Limit Protection
The RT9055 allows stable operation with very small
ceramic output capacitors, hence minimizing required
board space and component cost.
Short Circuit Thermal Folded Back Protection
RoHS Compliant and Halogen Free
Applications
The RT9055 is available in a WL-CSP-6B 0.8x1.2 package.
Cellular Handsets
Ordering Information
Battery Powered Equipment
Hand-Held Instruments
Portable InformationAppliances
RT9055-
Package Type
WSC : WL-CSP-6B 0.8x1.2
Output Voltage : VOUT1/VOUT2
VOUT2 > VOUT1 is Recommended
Note :
Pin Configurations
(TOP VIEW)
A1
B1
A2
B2
EN1
GND
EN2
VOUT1
VIN
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
C1 C2
VOUT2
Suitable for use in SnPb or Pb-free soldering processes.
WSC-CSP-6B 0.8x1.2
Marking Information
Available Voltage Version
Code Voltage Code Voltage Code Voltage
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
A
D
G
K
N
R
V
Y
2
3.5
1.85
1.8
B
E
H
L
1.3
2.1
2
C
F
1.2
1.5
J
2.5
2.6
2.7
3
M
Q
T
2.8
2.85
3.2
P
S
W
U
3
3.1
3.3
1.6
1.4
1
2.65
3.15
1.25
2.9
X
Z
1.9
1.1
Copyright 2014 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9055-02 August 2014
www.richtek.com
1
RT9055
Typical Application Circuit
A2
C2
B2
V
V
V
VOUT1
RT9055
VIN
IN
OUT1
C
1µF
OUT1
C
IN
1µF
A1
EN1
EN2
VOUT2
OUT2
Chip Enable
C
OUT2
C1
1µF
GND
B1
Functional Pin Description
Pin No.
Pin Name
Pin Function
A1
EN1
LDO1 Enable (Active High).
LDO1 Output Voltage.
Ground.
A2
VOUT1
GND
B1
B2
VIN
Supply Input.
C1
EN2
LDO2 Enable (Active High).
LDO2 Output Voltage.
C2
VOUT2
Function Block Diagram
EN1
Shutdown
and
VIN
13µA
Logic Control
VREF
Output
Driver
+
VOUT1
Current Limit
and
Thermal Protection
EN2
Shutdown
13µA
and
Logic Control
VREF
Output
Driver
+
VOUT2
Current Limit
and
Thermal Protection
GND
Copyright 2014 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS9055-02 August 2014
RT9055
Absolute Maximum Ratings (Note 1)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- −0.3V to 6V
Other I/O Pins Voltages ------------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
WL-CSP-6B 0.8x1.2------------------------------------------------------------------------------------------------------ 0.670W
Package Thermal Resistance (Note 2)
WL-CSP-6B 0.8x1.2, θJA ------------------------------------------------------------------------------------------------ 148°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) ----------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- 1.5V to 5.5V
Junction Temperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range-------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = VOUT + 1V, CIN = COUT = 1μF, TA = −40°C to 85°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Power Supply
V
= 1.2V to 1.4V, I
= 300mA
50
40
--
--
550
400
300
3.5
2
OUT
OUT
OUT
OUT
Dropout Voltage
(Note 5)
V
DROP
V
OUT
= 1.5V to 2.4V, I
= 2.5V to 3.5V, I
= 300mA
= 300mA
mV
V
OUT
20
--
Output Voltage Range
V
0.9
2
--
V
%
OUT
V
OUT
Accuracy
V
I
= 1mA to 300mA
--
OUT
Line Regulation
Load Regulation
Current Limit
V
V
I
V
= (V
+ 1) to 5.5V, I
< 300mA
= 1mA
2
--
2
%
LINE
IN
OUT
OUT
OUT
1mA< I
1.5
350
--
--
1.5
--
%
LOAD
R
= 0
LOAD
600
58
--
mA
A
A
LIM
Quiescent Current
Shutdown Current
EN Input
I
Q
V
EN
> 1.5V
< 0.4V
--
I
V
EN
--
1
SHDN
Logic-High
Logic-Low
V
IH
V
= 2.5V to 5.5V, Power On
= 2.5V to 5.5V, Shutdown
IN
1.2
--
--
--
--
IN
Threshold
Voltage
V
V
IL
V
0.4
V
Discharge Resistance
OUT
V
IN
= 5V, EN1 = EN2 = GND
--
3
--
k
in Shutdown
(Note 6)
EN Pull Low Current
Thermal Shutdown
I
8
13
18
--
A
EN
T
--
170
°C
SD
Thermal Shutdown
Hysteresis
T
--
40
--
°C
SD
Copyright 2014 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9055-02 August 2014
www.richtek.com
3
RT9055
Parameter
Symbol
Test Conditions
f = 100Hz, V = V + 1V,
Min
Typ
Max
Unit
IN
OUT
--
70
--
C
OUT
= 2.2F, I
= 50mA
LOAD
f = 1kHz, V = V
+ 1V,
= 50mA
IN
OUT
--
--
--
70
70
54
--
--
--
C
OUT
= 2.2F, I
LOAD
f = 10kHz, V = V
+ 1V,
IN
OUT
C
OUT
= 2.2F, I
= 50mA
+ 1V,
OUT
= 50mA
LOAD
Power Supply Rejection
Ratio
PSRR
dB
f = 100kHz, V =V
IN
C
OUT
= 2.2F, I
LOAD
f = 200kHz, V = V
+ 1V,
= 50mA
IN
OUT
--
--
--
45
38
--
--
--
C
OUT
= 2.2F, I
LOAD
f = 300kHz, V = V
+ 1V,
= 50mA
IN
OUT
C
OUT
= 2.2F, I
LOAD
C
OUT1
= C
= 10F, 10Hz
OUT2
Output Voltage Noise
100
V
RMS
to100kHz, I
= I
= 1mA
OUT2
OUT1
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 at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. The CSP
balls connect directly to the internal GND copper plane by 2 vias, the via diameter is about 1mm.
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, which is measured when VOUT is VOUT(NORMAL) − 100mV.
Note 6. It is guaranteed by design.
Copyright 2014 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS9055-02 August 2014
RT9055
Typical Operating Characteristics
Output Voltage vs. Temperature
Quiescent Current vs. Temperature
1.22
80
70
60
50
40
30
20
10
0
1.21
1.20
1.19
1.18
1.17
1.16
1.15
1.14
1.13
VIN = 3.7V, No Load
VIN = 3.7V, No Load
1.12
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Dropout Voltage vs. Load Current
Line Transient Response
140
120
100
80
125°C
25°C
VIN
(2V/Div)
−40°C
60
VOUT
40
(20mV/Div)
20
VOUT = 3.3V
250 300
VIN = 2.8V to 4.2V, ILOAD = 1mA
0
0
50
100
150
200
Time (100μs/Div)
Load Current (mA)
Line Transient Response
Line Transient Response
VIN
(2V/Div)
VIN
(2V/Div)
VOUT
(20mV/Div)
VOUT
(20mV/Div)
VIN = 2.8V to 4.2V, ILOAD = 10mA
VIN = 2.8V to 4.2V, ILOAD = 100mA
Time (100μs/Div)
Time (100μs/Div)
Copyright 2014 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9055-02 August 2014
www.richtek.com
5
RT9055
Load Transient Response
Line Transient Response
VOUT1
(50mV/Div)
VIN
(2V/Div)
IOUT
(100mA/Div)
VOUT
(20mV/Div)
VIN = 2.8V to 4.2V, ILOAD = 300mA
VIN = 1.8V, ILOAD = 1mA to 100mA
Time (100μs/Div)
Time (250μs/Div)
Load Transient Response
Power On from EN
VOUT1
(50mV/Div)
VEN
(1V/Div)
VOUT1
(1V/Div)
IOUT
(100mA/Div)
VOUT2
VIN = 3.6V, VEN = 2V
VOUT1 = VOUT2 = 1.2V, IOUT1 = IOUT2 = 100mA
(1V/Div)
VIN = 1.8V, ILOAD = 1mA to 300mA
Time (250μs/Div)
Time (50μs/Div)
Power Off from EN
VOUT1 Noise
VEN
(1V/Div)
VOUT
(100μV/Div)
VOUT1
(1V/Div)
VIN = 3.6V, VEN = 2V
VOUT2
(1V/Div)
VIN = VEN = 4.5V, ILOAD = 1mA
Time (5ms/Div)
VOUT1 = VOUT2 = 1.2V, IOUT1 = IOUT2 = 100mA
Time (50μs/Div)
Copyright 2014 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS9055-02 August 2014
RT9055
VOUT2 Noise
PSRR
0
-10
-20
-30
-40
-50
-60
-70
VOUT
(100μV/Div)
VOUT = 1.2V
VIN = VEN = 4.5V, ILOAD = 1mA
10
100
1
1K
10K
1
100K
1M
11
Time (5ms/Div)
(Hz)
Frequency
Copyright 2014 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9055-02 August 2014
www.richtek.com
7
RT9055
Applications Information
Like any low-dropout regulator, the external capacitors used
with the RT9055 must be carefully selected for regulator
stability and performance. Using a capacitor whose value
is >1μF on the RT9055 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.
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 :
PD(MAX) = (TJ(MAX) − TA) / θJA
where TJ(MAX) is the maximum junction temperature, TAis
the ambient temperature, and θJAis the junction to ambient
thermal resistance.
The output capacitor must meet both requirements for
minimum amount of capacitance and ESR in all LDOs
application. The RT9055 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 > 20mΩ on the
RT9055 output ensures stability. The RT9055 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 RT9055
and returned to a clean analog ground.
For recommended operating condition specifications, the
maximum junction temperature is 125°C. For WL-CSP-
6B 0.8x1.2 package, the thermal resistance, θJA, is 148°C/
Won a standard JEDEC 51-7 four-layer thermal test board.
The maximum power dissipation at TA = 25°C can be
calculated by the following formula :
PD(MAX) = (125°C − 25°C) / (148°C/W) = 0.670W
for WL-CSP-6B 0.8x1.2 package
The maximum power dissipation depends on the operating
ambient temperature for fixed TJ (MAX) and thermal
resistance, θJA. The derating curves in Figure 2 allow the
designer to see the effect of rising ambient temperature
on the maximum power dissipation.
0.8
Region of Stable COUT ESR vs. Load Current
Four-Layer PCB
100
VIN = 5V, CIN = COUT1 =COUT2 =1μF/X7R
0.6
0.4
0.2
0.0
10
Unstable Region
1
Stable Region
0.1
0.01
Simulation Verify
0
25
50
75
100
125
0.001
Ambient Temperature (°C)
0
50
100
150
200
250
300
Load Current (mA)
Figure 1. Stable COUT ESR Range
Figure 2. Derating Curve of Maximum PowerDissipation
Copyright 2014 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS9055-02 August 2014
RT9055
Outline Dimension
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
0.500
0.170
0.240
1.150
Max.
0.600
0.230
0.300
1.250
Min.
0.020
0.007
0.009
0.045
Max.
0.024
0.009
0.012
0.049
A
A1
b
D
D1
E
0.800
0.031
0.750
0.850
0.030
0.033
E1
e
0.400
0.400
0.016
0.016
6B WL-CSP 0.8x1.2 Package (BSC)
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. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. 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.
DS9055-02 August 2014
www.richtek.com
9
相关型号：
©2020 ICPDF网 联系我们和版权申明