RT9166A-33CX Richtek Technology Corporation, RT9166A-33CX Datasheet

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RT9166A-33CX

Manufacturer Part Number
RT9166A-33CX
Description
3.3V 0.5A Ultra-Fast Transient Response LDO Regulator
Manufacturer
Richtek Technology Corporation
Datasheet
General Description
The RT9166/A series are CMOS low dropout regulators
optimized for ultra-fast transient response. The devices
are capable of supplying 300mA or 500mA of output
current with a dropout voltage of 230mV or 430mV
respectively.
The RT9166/A series are is optimized for CD/DVD-ROM,
CD/RW or wireless communication supply applications.
The RT9166/A regulators are stable with output capacitors
as low as 1 F. The other features include ultra low dropout
voltage, high output accuracy, current limiting protection,
and high ripple rejection ratio.
The devices are available in fixed output voltages range
of 1.2V to 4.5V with 0.1V per step. The RT9166/A
regulators are available in 3-lead SOT-23, SOT-89,
SOT-223 and TO-92 packages.
Ordering Information
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.
DS9166/A-05 February 2004
RT9166/A -
300/500mA, Ultra-Fast Transient Response LDO Regulator
Package Type
VL : SOT-23 (L-Type)
X : SOT-89
XL : SOT-89 (L-Type)
G : SOT-223
GL : SOT-223 (L-Type)
Z : TO-92
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
Output Voltage
12 : 1.2V
13 : 1.3V
45 : 4.5V
500mA Output Current
300mA Output Current
:
Preliminary
Features
Applications
Pin Configurations
Low Quiescent Current (Typically 220 A)
Guaranteed 300/500mA Output Current
Low Dropout Voltage: 230/430mV at 300/500mA
Wide Operating Voltage Ranges: 3V to 5.5V
Ultra-Fast Transient Response
Tight Load and Line Regulation
Current Limiting Protection
Thermal Shutdown Protection
Only low-ESR Ceramic Capacitor Required for
Stability
Custom Voltage Available
CD/DVD-ROM, CD/RW
Wireless LAN Card/Keyboard/Mouse
Battery-Powered Equipment
XDSL Router
PCMCIA Card
SOT-23 (L-Type)
GND
1
VOUT
VOUT
(RT9166)
1
1
SOT-223
SOT-89
VIN
3
(TAB)
(TAB)
GND
GND
2
2
VOUT
2
VIN
VIN
3
3
(TOP VIEW)
3
2
1
SOT-223 (L-Type)
SOT-89 (L-Type)
GND
GND
(RT9166/A)
RT9166/A
1
1
TO-92
(TAB)
(TAB)
VIN
VIN
2
2
www.richtek.com
VOUT
VOUT
3
3
VOUT
GND
VIN
1

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RT9166A-33CX Summary of contents

Page 1

Ultra-Fast Transient Response LDO Regulator General Description The RT9166/A series are CMOS low dropout regulators optimized for ultra-fast transient response. The devices are capable of supplying 300mA or 500mA of output current with a dropout voltage of 230mV or ...

Page 2

RT9166/A Typical Application Circuit Note: To prevent oscillation minimum X7R or X5R dielectric is strongly recommended if ceramics are used as input/output capacitors. When using the Y5V dielectric, the minimum value of the input/output capacitance that can ...

Page 3

... Output Voltage Accuracy RT9166 Current Limit RT9166A Quiescent Current (Note 6) RT9166 Dropout Voltage (Note 4) RT9166A Line Regulation RT9166 Load Regulation (Note 5) RT9166A Power Supply Rejection Rate Thermal Shutdown Temperature Thermal Shutdown Hysteresis DS9166/A-05 February 2004 Preliminary (Note 1) (Note ...

Page 4

RT9166/A Note 1. Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the ...

Page 5

Typical Operating Characteristics Dropout Voltage vs. Output Current 600 C = 1uF 1uF OUT 500 400 300 200 100 0 0 100 200 Output Current (mA) Range of Stable ESR 100 10 Unstable Region 1 Stable Region ...

Page 6

RT9166/A Current Limit vs. Temperature 900 850 800 750 1uF 1uF OUT R = 0.5 L 700 -40 -50 - Temperature Quiescent Current vs. Temperature 260 240 220 200 ...

Page 7

Load Transoent Response 150mA IN LOAD 1uF (Ceramic, X7R) 200 IN OUT 100 -20 Time (100us/DIV) Line Transoent Response ...

Page 8

... OUT CURRENT LIMIT The RT9166/A monitors and controls the PMOS' gate voltage, minimum limiting the output current to 350mA for RT9166 and 550mA for RT9166A. The output can be shorted to ground for an indefinite period of time without damaging the part. SHORT-CIRCUIT PROTECTION The device is short circuit protected and in the event of a peak over-current condition, the short-circuit control loop will rapidly drive the output PMOS pass element off ...

Page 9

Aluminum electrolytics also typically have large temperature variation of capacitance value. Equally important to consider is a capacitor's ESR change with temperature: this is not an issue with ceramics, as their ESR is extremely low. However very important ...

Page 10

RT9166/A THERMAL CONSIDERATIONS The RT9166/A series can deliver a current 300/ 500mA over the full operating junction temp-erature range. However, the maximum output current must be derated at higher ambient temperature to ensure the junction temperature does ...

Page 11

Outline Dimension Symbol DS9166/A-05 February 2004 Preliminary Dimensions In Millimeters Min Max 0.889 1.295 -- 0.152 1.397 1.803 0.356 0.508 2.591 2.997 2.692 3.099 ...

Page 12

RT9166/A Symbol www.richtek.com 12 Preliminary Dimensions In Millimeters Min Max 1.397 1.600 0.356 0.483 2.388 2.591 0.406 0.533 -- 4.242 0.787 ...

Page 13

Symbol DS9166/A-05 February 2004 Preliminary Dimensions In Millimeters Min Max -- 1.803 0.020 0.100 0.610 0.787 3.302 3.708 6.706 7.290 ...

Page 14

RT9166/A Symbol RICHTEK TECHNOLOGY CORP. Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 www.richtek.com 14 Preliminary Dimensions ...

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