RT9171-33CM Просмотр технического описания (PDF) - Richtek Technology
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RT9171-33CM Datasheet PDF : 6 Pages
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RT9171
2A Fixed and Adjustable Low Dropout
Positive Voltage Regulators
General Description
The RT9171 is a high performance positive voltage
regulator designed for applications requiring low
dropout at fully rated current. Additionally, the
RT9171 provides excellent regulation over variations
in line and load. Outstanding features include low
dropout performance at rated current, fast transient
response, internal current-limiting, and thermal-
shutdown protection of the output device. The
RT9171 three-terminal regulator offers fixed 2.5V
and 3.3V output voltages, and adjustable voltage
options available in TO-252 and TO-263 packages.
Applications
z Active SCSI Termination
z Low Voltage Microcontrollers
z Switching Power Supply Post-Regulator
Ordering Information
RT9171-
Package type
L : TO-252
M : TO-263
Operating temperature range
C: Commercial standard
Output voltage
Default : Adjustable
25 : 2.5V output voltage
33 : 3.3V output voltage
Features
z Low Dropout, 1.6V Max.
z Full Current Rating Over Line and Temperature
z Fast Transient Response
z ±1 % Output Voltage Accuracy
z Adjustable and Fixed Output Voltage
z TO- 252 and TO- 263 Packages
Pin Configurations
Part Number
RT9171-
CL
(Plastic TO-252)
RT9171-
CM
(Plastic TO-263)
Pin Configurations
TOP VIEW
123
1. ADJ/GND
2. VOUT (TAB)
3. VIN
TOP VIEW
123
1. ADJ/GND
2. VOUT (TAB)
3. VIN
Typical Application Circuit
Adjustable Voltage Regulator
VIN = 5V
RT9171
VIN VOUT
ADJ
VREF
+ C1
10µF
IA DJ
VOUT = 3.3V
R1
120
1% + C2
R2
195
22µF
TANT
1%
VOUT = VREF (1+RR12 ) + IADJ R2
(1) C1 needed if device is far from filter capacitors.
(2) C2 required for stability.
DS9171-02 May 2001
www.richtek-ic.com.tw
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