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  Richtek Technology Electronic Components Datasheet  

RT9017 Datasheet

Thermal Folded Back CMOS LDO Regulator

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Preliminary
RT9017
500mA Peak, Thermal Folded Back CMOS LDO Regulator
General Description
The RT9017 is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9017 performance is optimized for
battery-powered systems to deliver ultra low noise and
low quiescent current. Regulator ground current increases
www.DataShoenelyt4Usl.icgohmtly in dropout, further prolonging the battery life.
The RT9017 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices. The
RT9017 consumes less than 0.01μA in shutdown mode
and has fast turn-on time less than 50μs. RT9017 is short
circuit thermal folded back protected. RT9017 lowers its
OTP trip point from 165°C to 110°C when output short
circuit occurs (VOUT < 0.4V) providing maximum safety to
end users. 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 and WDFN-6L 2x2 packages, the RT9017 also
offers a range of 1.5V to 3.5V with 0.1V per step.
Ordering Information
RT9017-
Package Type
V : SOT-23-3
B : SOT- 23-5
BR : SOT- 23-5 (R-Type)
QW : WDFN-6L 2x2 (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage
15 : 1.5V
16 : 1.6V
:
34 : 3.4V
35 : 3.5V
1H : 1.85V
2H : 2.85V
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.
DS9017-03 August 2007
Features
z Short Circuit Thermal Folded Back Protection
z Low-Noise for RF Application
z Fast Response in Line/Load Transient
z Quick Start-Up (Typically 50μs)
z 0.01μA Standby Current When Shutdown
z Low Dropout : 380mV @ 500mA
z Wide Operating Voltage Ranges : 2.5V to 5.5V
z TTL-Logic-Controlled Shutdown Input
z Low Temperature Coefficient
z Current Limiting Protection
z Thermal Shutdown Protection
z Only 1μF Output Capacitor Required for Stability
z High Power Supply Rejection Ratio
z Custom Voltage Available
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
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
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
EN 1
GND 2
VIN 3
6 NC
5 NC
7 4 VOUT
WDFN-6L 2x2
3
12
GND
VOUT
SOT-23-3
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9017 Datasheet

Thermal Folded Back CMOS LDO Regulator

No Preview Available !

RT9017
Preliminary
EN 1 5 VIN
NC 2
GND 3 4 VOUT
SOT-23-5
VIN 1 5 VOUT
GND 2
EN 3 4 NC
SOT-23-5 (R-Type)
www.DataShTeyetp4Ui.ccoaml Application Circuit
VIN CIN
1uF
Chip Enable
RT9017
VIN VOUT
EN GND
COUT VOUT
1uF
Functional Pin Description
Pin Name
EN
NC
GND
VOUT
VIN
Pin Function
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.
No Internal Connection.
Ground.
Output Voltage.
Input Voltage.
Function Block Diagram
EN
VREF
Shutdown
and
Logic Control
-
Error
Amplifier
MOS Driver
Current-Limit
and
Thermal
Protection
VIN
VOUT
GND
www.richtek.com
2
DS9017-03 August 2007


Part Number RT9017
Description Thermal Folded Back CMOS LDO Regulator
Maker Richtek Technology
Total Page 12 Pages
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