OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

RT9018A-12GSP

P1-P3P4-P6P7-P9P10-P12
RT9018A/B
1
DS9018A/B-07 September 2010 www.richtek.com
Pin Configurations
Maximum 3A, Ultra Low Dropout Regulator
Ordering Information
Features
zz
zz
z
Maximum 3A Low-Dropout Voltage Regulator
zz
zz
z High Accuracy Output Voltage
±±
±±
±1.5%
zz
zz
z Typically 220mV Dropout at 3A
zz
zz
z Power Good Output
zz
zz
z Output Voltage Pull Low Resistance when Disable
zz
zz
z Thermal and Over Current Protection
zz
zz
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Front Side Bus VTT (1.2V/3A)
z NoteBook PC Applications
z Motherboard Applications
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
(TOP VIEW)
WDFN-10L 3x3
General Description
The RT9018A/B is a high performance positive voltage
regulator designed for use in applications requiring very
low Input voltage and very low dropout voltage at up to
3A(Peak). It operates with a VIN as low as 1.4V and VDD
voltage 3V with output voltage programmable as low as
0.8V. The significant feature includes ultra low dropout,
ideal for applications where VOUT is very close to VIN.
Additionally, there is an enable pin to further reduce power
dissipation while shutdown. The RT9018A/B provides
excellent regulation over variations in line, load and
temperature. and provides a power OK signal to indicate
if the voltage level of Vo reaches 90% of its rating value.
The RT9018A/B is available in the SOP-8 (Exposed Pad)
and WDFN-10L 3x3 packages with 1V, 1.05V, 1.2V, 1.5V,
1.8V and 2.5V internally preset outputs that are also
adjustable using external resistors.
SOP-8 (Exposed Pad)
PGOOD
EN
VIN
VDD
GND
ADJ
NC
VOUT
GND
2
3
4
5
6
7
8
9
VOUT
VOUT
PGOOD
ADJ
VDD
VIN
VIN
EN
VIN
VOUT
9
8
7
9
1
2
3
4
5
10
GND
11
Note :
Richtek Green 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.
RT9018A/B-
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
QW : WDFN-10L 3x3
Enable Pin Function
A : Internal Pull High
B : Internal Pull Low
Output Voltage
10 : 1V/Adj
1K : 1.05V/Adj
12 : 1.2V/Adj
15 : 1.5V/Adj
18 : 1.8V/Adj
25 : 2.5V/Adj
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Z : ECO (Ecological Element)
RT9018A/B
2
DS9018A/B-07 September 2010www.richtek.com
Function Block Diagram
Typical Application Circuit
Pin Description
Pin No.
Pin Name Pin Function
PSOP-8 WDFN 3x3
3 7, 8, 9 VIN Supply Inp ut Voltage.
2 6 EN Ch ip Ena ble (Active-Hi gh).
4 10 VDD Supply Voltage of Control Circuit ry.
1 5 PGOOD Power Good Open Drain Output.
7 4 ADJ
Set the output voltage by the internal feedback resistors when
ADJ is grounded. If external feedback resistors is used, V
OUT
=
0.8V x (R1 + R2)/R2.
6 1, 2, 3 VOUT Output Voltage.
5 -- NC No Internal Connection.
8,
Ex
p
osed Pad
(
9
)
Exposed Pad (11) GND
Ground. The exposed p ad must be soldered to a large PCB and
connected to GND for maximum
p
ower dissi
p
ation.
Figure 1. Fixed Voltage Regulator Figure 2. Adjustable Voltage Regulator
R2
R2R1
0.8 V
OUT
+
×=
VIN
EN
GND
VOUT
ADJ
PGOOD
RT9018
V
OUT
10µF
10µF
Chip Enable
100k
V
OUT
VDD
1µF
V
DD
VIN
EN
GND
VOUT
ADJ
PGOOD
RT9018A/B
V
OUT
10µF
10µF
Chip Enable
R1
R2
100k
V
OUT
VDD
1µF
V
DD
V
IN
C
Dummy
OCP
Error
Amplifier
POR
EN
GND
ADJ
VIN
PGOOD
VOUT
VDD
Mode
+
-
+
-
0.8V
0.72V
Driver
OTP
RT9018A/B
3
DS9018A/B-07 September 2010 www.richtek.com
Electrical Characteristics
(V
IN
= V
OUT
+ 500mV, V
EN
= V
DD
= 5V, C
IN
= C
OUT
= 10μF, T
A
= T
J
= 25°C, unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
POR Threshold 2.4 2.7 3 V
POR Hysteresis 0.15 0.2 -- V
Adjustable Pin Threshold V
TH_ADJ
I
OUT
= 1mA -- 0.2 0.4 V
Reference Voltage (ADJ Pin Voltage) V
ADJ
I
OUT
= 1mA 0.788 0.8 0.812 V
Fixed Output Voltage Range ΔV
OUT
−1.5 0 +1.5 %
Line Regulation (V
IN
) ΔV
LINE_IN
V
IN
= V
OU T
+ 0.5V to 5V,
I
OUT
= 1mA
-- 0.2 0.6 %
Load Regulation (Note 7) ΔV
LOAD
V
IN
= V
OU T
+ 1V,
I
OUT
= 1mA to 3A
-- 0.2 1 %
I
OUT
= 2A -- 150 250 mV
Dropout Voltage (Note 5) V
DROP
I
OUT
= 3A -- 210 350 mV
Quiescent Current (Note 6) I
Q
V
DD
= 5.5V -- 0.6 1.2 mA
Current Limit I
LIM
3.2 4.5 -- A
Short Circuit Current
V
OUT
< 0.2V 0.5 1.8 -- A
In-rush Current
C
OUT
= 10μF, Enable Start-up -- 0.6 -- A
V
OUT
Pull Low Resistance
V
EN
= 0V -- 150 -- Ω
To be continued
Recommended Operating Conditions (Note 4)
z Supply Voltage, V
IN
------------------------------------------------------------------------------------------------- 1.4V to 5.5V
z Control Voltage, V
DD
(V
DD
P V
OUT
+ 1.5V) --------------------------------------------------------------------- 3V to 5.5V
z Junction Temperature Range -------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range -------------------------------------------------------------------------------------- −40°C to 85°C
Absolute Maximum Ratings (Note 1)
z Supply Voltage, V
IN
------------------------------------------------------------------------------------------------- 1V to 6V
z Control Voltage, V
DD
------------------------------------------------------------------------------------------------ 3V to 6V
z Output Voltage, V
OUT
----------------------------------------------------------------------------------------------- 0.8 to 6V
z Power Dissipation, P
D
@ T
A
= 25°C
SOP-8 (Exposed Pad) ---------------------------------------------------------------------------------------------- 1.33W
WDFN-10L 3x3 ------------------------------------------------------------------------------------------------------- 1.67W
z Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θ
JA
---------------------------------------------------------------------------------------- 75°C/W
SOP-8 (Exposed Pad), θ
JC
---------------------------------------------------------------------------------------- 15°C/W
WDFN-10L 3x3, θ
JA
-------------------------------------------------------------------------------------------------- 60°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
P1-P3P4-P6P7-P9P10-P12

RT9018A-12GSP

Mfr. #:
Buy RT9018A-12GSP
Manufacturer:
Description:
IC REG LINEAR POS ADJ 3A 8SOP
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet