RT9186A/B
Low Profile 500mA LDO with Enable and Power Good/Reset
General Description
The RT9186 is a low-dropout linear regulator providing up
to 500mA load current with 160mV dropout. It is especially
designed for the application of portable and smart handheld
device.
The RT9186 operates from 2.5V to 5.5V supply. The
internal P-MOSFET pass transistor allows the regulator
to work with 190µA low quiescent current. Its preset output
voltage version covers the most frequently used values,
including 1.8V/2.5V/3.3V. Output voltage can also be
adjusted via the ADJ pin for those other than the preset
values.
With only 0.1µA required in the shut down mode, one
enable pin is able to control output on/off. RT9186A
contains PGOOD function. On the other hand, RT9186B
contains RST function with 6ms (typ.) time delay.
Features
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2.5V to 5.5V Wide Input Range
Guaranteed 500mA Output Current
Low 160mV Dropout at 500mA
1.8V/2.5V/3.3V Preset Output Voltage Version with
Adjustable Range from 0.8V to 4.5V.
Reset Output with 6ms (typ.) Delay Time
Power Good Output
Low 190µA Ground Pin Current
0.1µA Shutdown Current
Thermal and Over Current Protection
RoHS Compliant and 100% Lead (Pb)-Free
Applications
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Ordering Information
RT9186A/B
−
Package Type
F : MSOP-8
QV : VDFN-8L 3x3 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage
Default : Adjustable
18 : 1.8V
25 : 2.5V
33 : 3.3V
A : Power Good Function
B : Reset Function
Notebook Computer
PDAs/SHDs
PCMCIA/Cardbus Card Product
Mobile Phone
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
(TOP VIEW)
VIN
VIN
PGOOD
EN
8
2
3
4
7
6
5
VOUT
VOUT
ADJ
GND
VIN
VIN
PGOOG
EN
1
2
3
4
9
8
7
6
5
VOUT
VOUT
ADJ
GND
MSOP-8
RT9186A
VDFN-8L 3x3
Note :
Richtek Pb-free and 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.
}100%matte
tin (Sn) plating.
VIN
VIN
RST
EN
8
2
3
4
7
6
5
VOUT
VOUT
ADJ
GND
VIN
VIN
RST
EN
1
2
3
4
9
8
7
6
5
VOUT
VOUT
ADJ
GND
MSOP-8
RT9186B
VDFN-8L 3x3
DS9186AB-10 August 2007
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
