RT9022GU6 [RICHTEK]
High Voltage, Low Quiescent, 60mA LDO Regulator; 高电压，低静态， 60毫安LDO稳压器
| 型号： | RT9022GU6 |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | High Voltage, Low Quiescent, 60mA LDO Regulator |
| 文件： | 总11页 (文件大小：149K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary
RT9022
High Voltage, Low Quiescent, 60mA LDO Regulator
General Description
Features
z Low Quiescent Current (Typically 40μA)
z Wide Operating Voltage Ranges : 5V to 20V
z Ultra-Fast Transient Response
The RT9022 is designed for positive CCDbias applications
with critical performance and space requirements. The
RT9022 performance is optimized for battery-powered
systems to deliver low noise and low quiescent current
and with soft start function.
z Tight Load and Line Regulation
z Current Limiting Protection
z Thermal Shutdown Protection
The RT9022 also works well with low-ESR ceramic
capacitors, reducing the amount of board space necessary
for power applications and consumes less than 1μA in
shutdown mode.
z Adjustable Soft Start Time
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z DSC
The other features include ultra low dropout voltage, high
output accuracy, and current limiting protection. The part
is available in the SOT-23-6, TSOT-23-6 and SC-70-6
packages.
z Camcorder
Pin Configurations
Ordering Information
(TOP VIEW)
RT9022
EN
6
SS
5
FB
4
Package Type
E : SOT-23-6
J6 : TSOT-23-6
U6 : SC-70-6
1
2
3
VIN GND VOUT
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
SOT-23-6 / TSOT-23-6 / SC-70-6
Note : There is no pin1 indicator on top mark for SOT-23-6
and SC-70-6 type, and pin 1 will be lower left pin when reading
top mark from left to right.
Note :
Richtek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Typical Application Circuit
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
1
3
V
V
VIN
VOUT
IN
OUT
1nF
RT9022
1uF
ON
R1
R2
Marking Information
2.2uF
4
2
6
5
EN
SS
FB
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
OFF
GND
R1
R2
VOUT = VFB (1+
)V
DS9022-00 September 2007
www.richtek.com
1
Preliminary
RT9022
Function Block Diagram
EN
Shutdown
VIN
and
Logic Control
VREF
-
MOS Driver
+
FB
SS
Error
Amplifier
VOUT
GND
Current Limit
and
Thermal
Protection
Soft Start
Functional Pin Description
Pin Number Pin Name Pin Function
1
2
3
4
5
6
VIN
GND
VOUT
FB
Power Input Voltage.
Ground.
Output Voltage.
Output Voltage Feedback.
Soft Start and Noise Bypass.
Chip Enable. (Active High)
SS
EN
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2
DS9022-00 September 2007
Preliminary
Absolute Maximum Ratings (Note 1)
RT9022
z Supply Input Voltage, VIN -------------------------------------------------------------------------------------------- 21V
z Enable Voltage, VEN -------------------------------------------------------------------------------------------------- 18V
z Power Dissipation, PD @ TA = 25°C
SOT-23-6/TSOT-23-6-------------------------------------------------------------------------------------------------- 300mW
SC-70-6 ------------------------------------------------------------------------------------------------------------------ 225mW
z Package Thermal Resistance (Note 4)
SOT-23-6/TSOT-23-6, θJA -------------------------------------------------------------------------------------------- 250°C/W
SC-70-6, θJA ------------------------------------------------------------------------------------------------------------ 333°C/W
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, VIN -------------------------------------------------------------------------------------------- 5V to 20V
z Junction Temperature Range---------------------------------------------------------------------------------------- −40°C to 100°C
z Ambient Temperature Range---------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = VEN = 15V, CIN = 1μF, COUT = 2.2μF, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max Units
Input Power
Quiescent Current
Standby Current
I
= 0mA
--
--
40
--
80
1
μA
μA
OUT
EN = GND
Reference Voltage
Feedback Voltage
V
= V
, I = 1mA
--
−1.5
--
1.25
--
--
+1.5
--
V
%
FB
FB
OUT LOAD
Feedback Voltage Tolerance
Feedback Input Current
V
= 1.3V
10
nA
Soft Start
--
1.5
80
--
--
μA
Soft Start Current
Output
V
R
= 15V, V
= 14V,
IN
OUT
60
mA
Output Current Limit
ILIM
= 50Ω
OUT
V
= Unconnected,
IN
--
--
--
30
0.2
65
--
0.3
--
μA
V
Output Reverse Leakage Current
Dropout Voltage
Output set to 5V
I
= 30mA, V = 14V
OUT
LOAD
f = 120Hz, V = V
+ 1V,
IN
OUT
dB
I
= 10mA
OUT
Power Supply Rejection Rate
Discharge Current
f = 10KHz, V = V
+ 1V,
IN
OUT
--
--
55
20
--
--
dB
I
= 10mA
OUT
EN = High to Low, V
= 14V
mA
OUT
To be continued
DS9022-00 September 2007
www.richtek.com
3
Preliminary
RT9022
Parameter
Symbol
Test Conditions
Min
Typ
Max Units
EN
EN Input Current
EN = 15V
−1
2.4
--
--
--
--
3
--
μA
V
EN High-Level Input Voltage
EN Low-Level Input Voltage
Thermal Protection
VEN_H
VEN_L
0.6
V
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
--
--
135
10
--
--
°C
°C
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.
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4
DS9022-00 September 2007
Preliminary
Typical Operating Characteristics
RT9022
Quiescent Current vs. Temperature
Output Voltage vs. Temperature
60
55
50
45
40
35
16.0
15.5
15.0
14.5
14.0
VIN = 5V, VOUT = 1.25V
VIN = 18V, ILOAD = 0mA
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
(°C)
Temperature (°C)
Temperature
Feedback Voltage vs. Temperature
Dropout Voltage vs. Load Current
400
300
200
100
0
1.30
1.28
1.26
1.24
1.22
1.20
VIN = 5V
VOUT = 15V
TJ = 100°C
TJ = 25°C
TJ = −40°C
0
10
20
30
40
50
60
-50
-25
0
25
50
75
100
Load Current (mA)
Temperature
(°C)
Line Transient Response
Line Transient Response
VOUT = 15V, ILOAD = 3mA
VOUT = 15V, ILOAD = 20mA
18
18
VIN
(V)
VIN
(V)
17
17
VOUT
VOUT
(10mV/Div)
(10mV/Div)
Time (1ms/Div)
Time (1ms/Div)
DS9022-00 September 2007
www.richtek.com
5
Preliminary
RT9022
Load Transient Response
Load Transient Response
VIN = 18V, VOUT = 15V
ILOAD = 3mA to 20mA
VIN = 18V, VOUT = 15V
ILOAD = 3mA to 50mA
ILOAD
(20mA/Div)
ILOAD
(50mA/Div)
VOUT
VOUT
(5mV/Div)
(5mV/Div)
Time (1ms/Div)
Time (1ms/Div)
Power On/Off
PSRR
20
0
VIN = VEN = 6.9V to 7V, VOUT = 5V
ILOAD = 10mA
VIN = 18V, VOUT = 15V, ILOAD = 20mA
VEN
(10V/Div)
-20
-40
-60
-80
VOUT
(10V/Div)
IIN
(100mA/Div)
0.01
0.1
1
10
100
1000
Time (2.5ms/Div)
Frequence
(kHz)
Region of Stable COUT ESR vs. Load Current
100.00
VIN = 18V, VOUT = 15V
CIN = 1μF/X7R, COUT = 2.2μF/X5R
Unstable Region
10.00
1.00
0.10
0.01
Stable Region
0
10
20
30
40
50
60
Load Current (A)
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6
DS9022-00 September 2007
Preliminary
RT9022
Application Information
Enable
Thermal Consideration
The RT9022 goes into sleep mode when the Enable pin is
in a logic low condition. During this condition, the pass
transistor, error amplifier, and bandgap are turned off,
reducing the supply current to 1μA. The Enable input is a
CMOS logic and cannot be left floating.
Thermal protection limits power dissipation in the RT9022.
When the operating junction temperature exceeds 135°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 10°C.
For continuous operation, do not exceed absolute
maximum operation junction temperature 125°C. The
power dissipation definition in device is :
Output capacitor
The RT9022 is specifically designed to use ceramic output
capacitors as low as 2.2μF. Ceramic capacitors below 10μF
offer significant cost and space saving, along with high
frequency noise filtering. The RT9022 doesn't rely on a
zero, which is generated by output capacitor ESR. So,
the output capacitor ESR is not sensitive and very low
ESR is allowed.
PD = (VIN − VOUT) x IOUT + VIN x IQ
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 :
Input capacitor
PD(MAX) = ( TJ(MAX) − TA ) / θJA
A 1μF input capacitor or greater located as close as
possible to the IC is recommended. Larger input capacitor
value with lower ESR provides better power supply noise
rejection and line transient response. Larger load current
requires larger capacitor value.
Where TJ(MAX) is the maximum operation junction
temperature 100°C, TAis the ambient temperature and the
θJA is the junction to ambient thermal resistance.
For recommended operating conditions specification of
the RT9022, where TJ(MAX) is the maximum junction
temperature of the die (100°C) and TA is the maximum
ambient temperature. The junction to ambient thermal
resistance ( θJA is layout dependent) for T/SOT-23-6
package is 250°C/W, and SC-70-6 package is 333°C/W
on standard JEDEC 51-3 thermal test board. The
maximum power dissipation at TA= 25°C can be calculated
by following formula :
PSRR
The power supply rejection ratio (PSRR) is defined as the
gain from the input to output divided by the gain from the
supply to the output. The PSRR is found to be
⎛
⎞
ΔGain Error
ΔSupply
PSRR = 20×log
⎜
⎝
⎟
⎠
Note that when heavy load is measured, Δsupply will cause
Δtemperature. And Δtemperature will cause Δoutput
voltage. So the temperature effect must be taken into
consideration.
PD(MAX) = (100°C − 25°C) / 250°C/W = 300mW for
T/SOT-23-6 package
PD(MAX) = (100°C − 25°C) / 333°C/W = 225mW for
SC-70-6 package
Current Limit
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance θJA. For the RT9022 packages, the Figure 1 of
de-rating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
allowed.
The RT9022 contains an independent current limiter, which
monitors and controls the pass transistor's gate voltage
to limit the output current to 80mA typically. It protects
the part even directly short the output to GND.
DS9022-00 September 2007
www.richtek.com
7
Preliminary
RT9022
400
350
300
250
200
150
100
50
Single Layer PCB
T/SOT-23-6
SC-70-6
0
0
10 20 30 40 50 60 70 80 90 100
Ambient Temperature (°C)
Figure 1.De-rating Curves
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8
DS9022-00 September 2007
Preliminary
RT9022
Outline Dimension
H
D
L
C
A
B
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.889
0.000
1.397
0.250
2.591
2.692
0.838
0.080
0.300
1.295
0.152
1.803
0.560
2.997
3.099
1.041
0.254
0.610
0.031
0.000
0.055
0.010
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-23-6 Surface Mount Package
DS9022-00 September 2007
www.richtek.com
9
Preliminary
RT9022
H
D
L
C
A
B
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-23-6 Surface Mount Package
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10
DS9022-00 September 2007
Preliminary
RT9022
H
D
L
C
A
B
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-70-6 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
DS9022-00 September 2007
www.richtek.com
11
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