Richtek RT9166-12GVL, RT9166-12PVL, RT9166-12PX, RT9166-12PXL, RT9166-13GVL Schematic [ru]
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RT9166/A
300/600mA, Ultra-Fast Transient Response LDO Regulator
General Description
The RT9166/A series are CMOS low dropout regulators
optimized for ultra-fast transient response. The devices
are capable of supplying 300mA or 600mA of output current
with a dropout voltage of 230mV or 580mV respectively.
The RT9166/A series are is optimized for CD/DVD-ROM,
CD/RW or wireless communication supply applications.
The RT9166/A regulators are stable with output capacitors
as low as 1μF. The other features include ultra low dropout
voltage, high output accuracy, current limiting protection,
and high ripple rejection ratio.
The devices are available in fixed output voltages range of
1.2V to 4.5V with 0.1V per step. The RT9166/A regulators
are available in 3-lead SOT-23 (RT9166 only), SOT-89,
SOT-223, TO-92 and TO-252 packages.
Ordering Information
RT9166/A-
Package Type
VL : SOT-23-3 (L-Type) (RT9166 Only)
X : SOT-89
XL : SOT-89 (L-Type)
G : SOT-223
GL : SOT-223 (L-Type)
Z : TO-92
L : TO-252
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Output Voltage
12 : 1.2V
13 : 1.3V
:
45 : 4.5V
1B : 1.25V
600mA Output Current
300mA Output Current
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.
Features
zz
Low Quiescent Current (Typically 220
z
zz
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z Guaranteed 300/600mA Output Current
zz
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z Low Dropout Voltage : 230/580mV at 300/600mA
zz
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z Wide Operating Voltage Ranges : 3V to 5.5V
zz
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z Ultra-Fast T ran sient Response
zz
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z Tight Load and Line Regulation
zz
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z Current Limiting Protection
zz
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z Thermal Shutdown Protection
zz
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z Only Low-ESR Ceramic Capacitor Required for
zz
Stability
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z Custom Voltage Available
zz
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z RoHS Compliant and 100% Lead (Pb)-Free
zz
μμ
μA)
μμ
Applications
z CD/DVD-ROM, CD/RW
z Wireless LAN Card/Keyboard/Mouse
z Battery-Powered Equipment
z XDSL Router
z PCMCIA Card
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Pin Configurations
(TOP VIEW)
VIN
3
2
GND
SOT-23-3 (L-Type) (RT9166)
3
2
1
VOUT
VOUT
GND
VIN
TO-92
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DS9166/A-23 June 2012 www.richtek.com
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RT9166/A
123
VOUT
GND
VIN
(TAB)
123
GND
VIN
VOUT
(TAB)
1
GND
(TAB)
23
VINVOUT
1
2
GND VIN
(TAB)
3
VOUT
VOUT
SOT-223SOT-89 (L-Type) TO-252SOT-223 (L-Type)SOT-89
Typical Application Circuit
RT9166/A
Note: To prevent oscillation, a 1
V
IN
C
IN
1uF
μμ
μF minimum X7R or X5R dielectric is strongly recommended if ceramics are
μμ
VIN
GND
VOUT
C
OUT
1uF
V
OUT
used as input/output capacitors. When using the Y5V dielectric, the minimum value of the input/output
capacitance that can be used for stable over full operating temperature range is 3.3
μμ
μF. (see Application
μμ
Information Section for further details)
Functional Pin Description
231
GND
VIN
Pi n N a m e P in Func t ion
VIN Supply Input.
VOUT Regulator Output.
GND Common Ground.
Function Block Diagram
VIN
Current
Limiting
Sensor
Thermal
Shutdown
Error
Amplifier
1.2V
Reference
VOUT
+
-
GND
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RT9166/A
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage ------------------------------------------------------------------------------------------------- 6.5V
z Power Dissipation, P
SOT-23-3 --------------------------------------------------------------------------------------------------------------- 0.4W
SOT-89 ------------------------------------------------------------------------------------------------------------------ 0.571W
SOT-223 ---------------------------------------------------------------------------------------------------------------- 0.740W
TO-252 ------------------------------------------------------------------------------------------------------------------ 1.470W
z Package Thermal Resistance (Note 2)
SOT-23-3, θJA---------------------------------------------------------------------------------------------------------- 250°C/W
SOT-89, θJA------------------------------------------------------------------------------------------------------------ 175°C/W
SOT-89, θJC------------------------------------------------------------------------------------------------------------ 58°C/W
SOT-223, θJA----------------------------------------------------------------------------------------------------------- 135°C/W
SOT-223, θJC---------------------------------------------------------------------------------------------------------- 15°C/W
TO-252, θJA------------------------------------------------------------------------------------------------------------ 68°C/W
TO-252, θJC------------------------------------------------------------------------------------------------------------ 7°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 3)
HBM (Human Body Model)----------------------------------------------------------------------------------------- 2kV
@ TA = 25°C
D
Recommended Operating Conditions (Note 4)
z Supply Input Voltage ------------------------------------------------------------------------------------------------- 2.8V to 5.5V
z Junction Temperature Range --------------------------------------------------------------------------------------- − 40°C to 125°C
z Ambient Temperature Range --------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = V
+ 1V or V
OUT
= 2.8V whichever is greater, CIN = 1μF, C
IN
OUT
= 1μF, T
Parameter Symbol Test Conditions Min Typ Max Unit
Output Voltage Accuracy ΔV
OUT
I
OUT
= 1mA −1 -- 3 %
RT9166 300 -- --
Current Limit
RT9166A
Quiescent Current (Note 5) IQ I
Dropout Voltage
(Note 6)
RT9166 I
RT9166A
Line Regulation ΔV
Load Regulation
(Note 7)
RT9166 1mA < I
RT9166A
Power Supply Rejection Rate PSRR f = 1kHz, C
I
R
LIM
V
DROP
LINE
ΔV
LOAD
= 1Ω
LOAD
= 0mA -- 220 300 μA
OUT
= 300mA -- 230 --
OUT
= 600mA -- 580 --
I
OUT
= (V
V
IN
I
= 1mA
OUT
1mA < I
+ 0.3V) to 5.5V,
OUT
< 300mA -- 15 35
OUT
< 600mA -- 30 55
OUT
OUT
Thermal Shutdown Temperature TSD -- 170 -- °C
= 25°C, unless otherwise specified)
A
mA
600 -- --
mV
-- 0.2 -- %/V
mV
= 1μF -- −55 -- dB
Thermal Shutdown Hysteresis ΔTSD -- 40 -- °C
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DS9166/A-23 June 2012 www.richtek.com
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RT9166/A
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. θ
is measured at T
JA
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. Quiescent, or ground current, is the difference between input and output currents. It is defined by I
no load condition (I
pin current.
Note 6.The dropout voltage is defined as V
Note 7. Regulation is measured at constant junction temperature by using a 20ms current pulse. Devices are tested for load
regulation in the load range from 1mA to 300mA and 600mA respectively.
= 25°C on a low effective thermal conductivity single-layer test board per JEDEC 51-3.
A
= IIN - I
Q
= 0mA). The total current drawn from the supply is the sum of the load current plus the ground
OUT
IN
− V
, which is measured when V
OUT
OUT
is V
OUT(NORMAL)
− 100mV.
OUT
under
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Typical Operating Characteristics
RT9166/A
Dropout Voltage vs. Loa d Current
700
CIN = 1uF
C
= 1uF
600
500
400
300
200
OUT
Dropout Voltage (mV)
100
0
0 100 200 300 400 500 600
Region of Stable C
100.00
10.00
1.00
ESR (Ω)
0.10
OUT
C
0.01
= 25°C
T
J
Load Current (mA)
ESR vs. Load Current
OUT
C
OUT
Instable
Stable
Instable
TJ = 125°C
TJ = −40°C
= 1uF to 4.7uF
Powe r Supply Rejection Ratio
0
V
= 5V
IN
CIN = 1uF
-10
C
= 1uF
OUT
-20
-30
PSRR (dB)
100mA
-40
1mA
-50
-60
10 100 1k 10k 100k 1M
Frequency (Hz)
Output Noise
I
LOAD
C
OUT
Output Noise Signal (μV)
400
200
0
-200
-400
V
= 5V
IN
CIN = 1uF
= 100mA
= 1uF
f = 10Hz to 100KHz
0.00
0 100 200 300 400 500 600
Time (1ms/DIV)
Load Current (mA)
Current Limit vs. Input v oltage
900
850
800
Current Limit (mA)
750
V
= 5V
IN
CIN = 1uF
C
= 1uF
OUT
RL = 0.5Ω
700
33.544.555.5
RT9166-33xX
Input voltage (V)
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
©
900
850
800
Current Limit (mA)
750
700
Current Limit vs. Input voltage
V
= 5V
IN
CIN = 1uF
C
= 1uF
OUT
RL = 0.5Ω
3 3.5 4 4.5 5 5.5
Input voltage (V)
RT9166-33xVL
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