Richtek RT9198-15GBG, RT9198-15GBR, RT9198-15GU5, RT9198-15GV, RT9198-15GY Schematic [ru]
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RT9198/A
300mA, Low Noise, Ultra-Fast CMOS LDO Regulator
General Description
The RT9198/A is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9198/A performance is optimized for
battery-powered systems to deliver ultra low noise and
low quiescent current. Regulator ground current increases
only slightly in dropout, further prolonging the battery life.
The RT9198/A also works with low-ESR ceramic
capacitors, reducing the amount of board space necessary
for power applications, critical in hand-held wireless
devices. The RT9198/A consumes less than 0.01uA in
shutdown mode and has fast turn-on time less than 50us.
The other features include ultra low dropout voltage, high
output accuracy, current limiting protection, and high ripple
rejection ratio. Available in the SOT-23-3, SOT-23-5,
TSOT-23-3, TSOT-23-5, SC-70-5, SC-82, MSOP-8 and
WDFN-6L 2x2 packages, the RT9198/A also offers a range
from 1.5V to 5.0V with 0.1V per step.
Features
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z Low-Noise for RF Application
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z Fast Response in Line/Load Transient
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z Quick Start-Up (T ypically 50us)
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z < 0.01uA Standby Current When Shutdown
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z Low Dropout : 220mV @ 300mA
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z Wide Operating Voltage Ranges : 2.5V to 5.5V
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z TTL-Logic-Controlled Shutdown Input
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z Low Temperature Coefficient
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z Current Limiting Protection
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z Thermal Shutdown Protection
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z Only 1uF Output Capa citor Required f or Sta bility
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z High Power Supply Rejection Ratio
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z Custom Voltage Available
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z RoHS Compliant and 100% Lead (Pb)-Free
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Applications
Ordering Information
RT9198/A-
Package Type
U5 : SC-70-5
U5R : SC-70-5 (R-Type)
Y : SC-82
V : SOT-23-3
B : SOT- 23-5
BR : SOT- 23-5 (R-Type)
BG : SOT- 23-5 (G-Type)
J3 : TSOT- 23-3
J5 : TSOT- 23-5
J5R : TSOT- 23-5 (R-Type)
J5G : TSOT- 23-5 (G-Type)
F : MSOP-8
QW : WDFN-6L 2x2 (W-Type)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Output Voltage
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
1H : 1.85V
2H : 2.85V
4G : 4.75V
Chip Enable Function (Active Low)
Chip Enable Function (Active High)
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.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
z CDMA/GSM Cellular Handsets
z Battery-Powered Equipment
z Laptop, Palmtops, Notebook Computers
z Hand-Held Instruments
z PCMCIA Cards
z Portable Information Appliances
DS9198/A-14 April 2011 www.richtek.com
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RT9198/A
Pin Configurations
(TOP VIEW)
VOUT
5
VIN
TSOT-23-5/SOT-23-5/
SC-70-5 (R-Type)
EN/EN
GND
23
GND
GND
1
2
3
7
NC
4
EN/EN
6
NC
5
NC
4
VOUTVIN
VIN
5
EN/EN
TSOT-23-5/SOT-23-5/
SC-70-5
NC
NC
GND
VIN
2
3
4
WDFN-6L 2x2
Typical Application Circuit
V
IN
VOUT
4
23
GND
NC
8
7
6
5
C
IN
1uF
EN/EN
NC
NC
VOUT
VIN
RT9198
VOUT
NC
VOUT
23
GND
VIN
4
5
EN/EN
TSOT-23-5/
SOT-23-5(G-Type)
VIN
VOUT
4
EN/EN
3
2
GND
SC-82MSOP-8
V
C
OUT
1uF
OUT
VIN
3
GND
TSOT-23-3/
SOT-23-3
2
VOUT
On
Off
V
IN
C
1uF
Chip Enable
Off
On
ENChip Enable
GND
RT9198A
VIN
IN
VOUT
V
OUT
C
OUT
1uF
EN
GND
DS9198/A-14 April 2011www.richtek.com
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Functional Pin Description
Pi n Na me Pin Fu nction
RT9198/A
EN
EN
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low
100kΩ resistor connected to GND when the control signal is floating.
Chip Enable (Active Low). Note that this pin is high impedance. There should be a pull high
100kΩ resistor connected to VIN when the control signal is floating.
NC No Internal Connection.
GND, Exposed Pad
Ground. The exposed pad must be soldered to a large PCB and connected to GND for
maximum power dissipation.
VOUT Output Voltage.
VIN Input Voltage.
Function Block Diagram
EN/EN
V
REF
Shutdown
and
Logic Control
-
+
Error
Amplifier
MOS Driver
Current-Limit
and
Thermal
Protection
VIN
VOUT
GND
DS9198/A-14 April 2011 www.richtek.com
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RT9198/A
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage ---------------------------------------------------------------------------------------------------- 6V
z Power Dissipation, P
TSOT-23-3/TSOT-23-5/SOT-23-3/SOT-23-5 ------------------------------------------------------------------------ 400mW
SC-70-5, SC-82 ---------------------------------------------------------------------------------------------------------- 300mW
MSOP-8 ------------------------------------------------------------------------------------------------------------------- 625mW
WDFN-6L 2x2 ------------------------------------------------------------------------------------------------------------- 606mW
z Package Thermal Resistance (Note 2)
TSOT-23-3/TSOT-23-5/SOT-23-3/SOT-23-5, θJA------------------------------------------------------------------- 250°C/W
SC-70-5, SC-82, θJA----------------------------------------------------------------------------------------------------- 333°C/W
MSOP-8, θJA-------------------------------------------------------------------------------------------------------------- 160°C/W
WDFN-6L 2x2, θJA------------------------------------------------------------------------------------------------------- 165°C/W
WDFN-6L 2x2, θJC------------------------------------------------------------------------------------------------------- 20°C/W
z Junction Temperature --------------------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------------- 260°C
z Storage Temperature Range ------------------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Mode) --------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ---------------------------------------------------------------------------------------------------- 200V
@ TA = 25°C
D
Recommended Operating Conditions (Note 4)
z Supply Input Voltage ---------------------------------------------------------------------------------------------------- 2.5V to 5.5V
z EN Input Voltage --------------------------------------------------------------------------------------------------------- 0V to 5.5V
z Junction Temperature Range ------------------------------------------------------------------------------------------
z Ambient Temperature Range ------------------------------------------------------------------------------------------
−40°C to 125°C
−40°C to 85°C
Electrical Characteristics
(V
= V
OUT
+ 1V, C
IN
Parameter Symbol Test Conditions Min Typ Max Unit
Output Voltage Accuracy ΔV
Current Limit I
Quiescent Current IQ
Dropout Voltage (Note 5) V
Line Regulation ΔV
Load Regulation ΔV
Shutdown Current I
EN Input Bias Current I
= C
IN
= 1μF, TA = 25°C, unless otherwise specified)
OUT
I
OUT
R
LIM
DROP
LINE
1mA < I
LOA D
SHDN
VEN = GND or VIN -- 0 100 nA
IBEN
= 1mA −2 -- +2 %
OUT
= 1Ω 360 400 -- mA
LOAD
RT9198, V
RT9198A, V
I
= 200mA -- 170 200
OUT
I
= 300mA -- 220 330
OUT
= (V
V
IN
I
= 1mA
OUT
RT9198, V
RT9198A, V
≧ 1.2V, I
EN
EN
+ 1V) to 5.5V,
OUT
< 300mA -- -- 0.6 %
OUT
= GND, Shutdown
EN
EN
= 0mA
OU T
≦ 0.4V, I
OUT
= 0mA
= VIN, Shutdown
-- 90 130 μA
mV
-- -- 0.3 %
-- 0.01 1 μA
T o be continued
DS9198/A-14 April 2011www.richtek.com
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RT9198/A
Parameter Symbol Test Conditions Min Typ Max Unit
Logic-Low
EN Threshold
Voltage
Logic-High
Voltage
Power Supply
Rejection Rate
f = 100Hz -- −60 - -
f = 10kHz
Thermal Shutdown
Temperature
Thermal Shutdown
Temperature Hysteresis
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. θ
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 V
is measured in the natural convection at TA = 25°C on a low effective single layers thermal conductivity test board
JA
of JEDEC 51-3 thermal measurement standard. The case point of θ
V
IL
V
IH
PSRR C
T
SD
ΔT
SD
RT9198, V
RT9198A, V
RT9198, V
RT9198A, V
= 1μF, I
OUT
-- 165 -- °C
-- 30 -- °C
-V
IN
, which is measured when V
OUT
= 3 V to 5.5V , Sh ut do wn
IN
= 3V to 5.5V, Enable
IN
= 3V to 5.5V, Enable
IN
= 3V to 5.5V, Shutdown
IN
= 100mA
OUT
is on the exposed pad for the package.
JC
OUT
is V
OUT(NORMAL)
-- -- 0.4
V
1.2 -- --
dB
-- −30 --
− 100mV.
DS9198/A-14 April 2011 www.richtek.com
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RT9198/A
Typical Operating Characteristics
Output Voltage vs. Temperature
2
V
= 5V
IN
CIN = C
1.9
1.8
No Load
1.7
Output Voltage (V)
1.6
-50 -25 0 25 50 75 100 125
OUT
= 1uF
Temperature
(°C)
EN Pin Shutdown Threshold vs. Temperature
1.5
RT9198/A-15
V
= 3.3V
IN
CIN = C
1.25
1
0.75
0.5
EN Pin Threshold Voltage (V)
0.25
-50 -25 0 25 50 75 100 125
OUT
= 1uF
Temperature
(°C)
Quiesent Current vs. Temperature
100
RT9198/A-15
V
= 3.3V
IN
95
CIN = C
90
85
80
75
70
OUT
= 1uF
Quiescent Current (uA)
65
60
-50 -25 0 25 50 75 100 125
Temperature
(°C)
Current Limit vs. Input Voltage
600
RT9198/A-15
CIN = C
550
500
450
400
Current Limit (mA)
350
300
22.533.544.555.566.5
OUT
= 1uF
Input Voltage (V)
Dropout Voltage vs. Load Current
300
RT9198/A-33
CIN = C
250
200
150
100
Dropout Voltage (mV)
50
0
0 0.05 0.1 0.15 0.2 0.25 0.3
OUT
= 1uF
T
Load Current (A)
= 25°C
J
T
= 125°C
J
T
= -40°C
J
20
V
= 2.5V
OUT
CIN = C
0
-20
-40
PSRR (dB)
I
LOAD
-60
I
LOAD
-80
10 100 1K 10K 100K 1M
0.01 0.1 1 10 100 1000
= 1uF, X7R
OUT
= 100mA
= 10mA
PSRR
Frequency (kHz)
(Hz)
DS9198/A-14 April 2011www.richtek.com
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