RT9187
®
DS9187-13 April 2017 www.richtek.com
1
©
Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Pin Configuration
Applications
CDMA/GSM Cellular Handsets
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
Mini PCI & PCI-Express Cards
PCMCIA & New Cards
Portable Information Appliances
1A, Ultra-Low Dropout, Ultra-Fast CMOS LDO Regulator
Ordering Information
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area.
General Description
The RT9187 is a high-performance, 1A LDO regulator,
offering extremely high PSRR and ultra-low dropout. Ideal
for portable RF and wireless applications with demanding
performance and space requirements.
A noise reduction pin is also available for further reduction
of output noise. Regulator ground current increases only
slightly in dropout, further prolonging the battery life. The
RT9187 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices.
The RT9187 consumes less than 0.1μA in shutdown mode
and has fast turn-on time less than 40μs. The other features
include ultra-low dropout voltage, high output accuracy,
current limiting protection, and high ripple rejection ratio.
Available in the VDFN-8L 3x3 and SOP-8 (Exposed Pad)
package.
(TOP VIEW)
VDFN-8L 3x3
Features
Ultra-Low-Noise for RF Application
Ultra-Fast Response in Line/Load Transient
Quick Start-Up (Typically 40
μμ
μμ
μs)
<0.1
μμ
μμ
μA Standby Current When Shutdown
Low Dropout : 240mV at 1A
Wide Operating Voltage Ranges : 2.5V to 5.5V
TTL-Logic-Controlled Shutdown Input
Current Limiting Protection
Thermal Shutdown Protection
Only 2.2
μμ
μμ
μF Output Capacitor Required for Stability
High Power Supply Rejection Ratio
RoHS Compliant and 100% Lead (Pb)-Free
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.
SOP-8 (Exposed Pad)
VIN
VIN
VOUT
VOUT
EN
NC
BP/ADJ
GND
GND
2
3
4
5
6
7
8
9
RT9187(
Package Type
QV : VDFN-8L 3x3 (V-Type)
SP : SOP-8 (Exposed Pad-Option 1)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
-
)
None : Adjustable Output
Fixed Output Voltage Code
10 : 1.0V
11 : 1.1V
:
32 : 3.2V
33 : 3.3V
1L : 1.34V
7
6
5
1
2
3
4
8
GND
9
VIN
VOUT
VOUT
VIN
EN
BP/ADJ
NC
GND
