rt9018a Richtek Technology Corporation, rt9018a Datasheet

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rt9018a

Manufacturer Part Number
rt9018a
Description
Maximum Ultra Dropout Regulator
Manufacturer
Richtek Technology Corporation
Datasheet

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Maximum 3A, Ultra Low Dropout Regulator
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 1.0V 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,
1.8V and 2.5V internally preset outputs that are also
adjustable using external resistors.
Ordering Information
Note :
Richtek Pb-free and Green products are :
DS9018A/B-04
RT9018A/B
RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
100% matte tin (Sn) plating.
ments of IPC/JEDEC J-STD-020.
September 2007
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
QW : WDFN-10L 3x3
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
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
Enable Pin Function
A : Internal Pull High
B : Internal Pull Low
cial Standard)
1.2V, 1.5V,
Features
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.
Pin Configurations
Maximum 3A Low-Dropout Voltage Regulator
High Accuracy Output Voltage ± ± ± ± ± 1.5%
Typically 220mV Dropout at 3A
Power Good Output
Output Voltage Pull Low Resistance when Disable
Thermal and Over Current Protection
RoHS Compliant and 100% Lead (Pb)-Free
Front Side Bus VTT (1.2V/3A)
NoteBook PC Applications
Motherboard Applications
PGOOD
VDD
PGOOD
VIN
EN
VOUT
VOUT
VOUT
ADJ
SOP-8 (Exposed Pad)
WDFN-10L 3x3
(TOP VIEW)
1
2
3
4
5
2
3
4
GND
GND
11
9
8
7
6
5
RT9018A/B
10
9
8
7
9
VDD
VIN
VIN
VIN
EN
GND
ADJ
VOUT
NC
www.richtek.com
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