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UM17525 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 UM17525
기능 VLDO Linear Regulator
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UM17525 데이터시트, 핀배열, 회로
UM175XX
300mA, Micropower, VLDO Linear Regulator
UM175XX SOT23-5
General Description
The UM175XX series are VLDO (very low dropout) linear regulators designed for low power
portable applications. Typical output noise is only 75μVRMS and maximum dropout is just 90mV
at the load current of 150mA.The internal P-channel MOSFET pass transistor requires no base
current, allowing the device to draw only 100μA during normal operation at the maximum load
current of 300mA.
Other features include high output voltage accuracy, excellent transient response, under voltage
lockout, stability with ultralow ESR ceramic capacitors as small as 1μF, short-circuit and thermal
overload protection and output current limiting.
The UM175XX series are available in a low profile SOT23-5 package.
Applications
z Bluetooth/802.11 Cards
z PDAs and Notebook Computers
z Portable Instruments and
Battery-Powered Systems
z Cellular Phones
Features
z Very Low Dropout: 90mV(max) at 150mA
z Maximum Input Voltage: 6.0V
z Low Noise:75μVRMS (10Hz to 100kHz)
z ±2%Voltage Accuracy at 150mA
z Fast Transient Response
z Under Voltage Lockout
z Fixed Output Voltage:
3.3V/3.0V/2.8V/2.7V/2.5V/1.8V/1.5V/1.3V/
1.2V
z Output Current Limit
z No Protection Diodes Needed
z Stable with 1μF Output Capacitor
z Short-Circuit and Thermal Overload
Protection
z Low Profile SOT23-5 Package
Pin Configurations
Top View
UM175XX
M: Monthly Code
SOT23-5
________________________________________________________________________
http://www.union-ic.com Rev.02 Oct.2008
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UM17525 pdf, 반도체, 판매, 대치품
UM175XX
Pin Function
IN (Pin 1): Power for UM175XX and Load. Power is supplied to the devices through the IN pin.
The IN pin should be locally bypassed to ground if the UM175XX series are more than a few
inches away from another source of bulk capacitance. In general, the output impedance of a
battery rises with frequency, so it is usually advisable to include an input bypass capacitor in
battery-powered circuits. A capacitor in the range of 0.1μF to 1μF is usually sufficient. The
UM175XX series are designed to withstand reverse voltages on the IN pin with respect to both
ground and the output pin. In the case of a reversed input, which can happen if a battery is
plugged in backwards, the UM175XX will act as if there is a large resistor in series with its input
with only a small amount of current flow.
GND (Pin 2): Ground and Heat Sink. Solder to a ground plane or large pad to maximize heat
dissipation.
___________
SHDN
(Pin 3): Shutdown, Active Low. This pin is used to put the UM175XX into shutdown. The
___________
SHDN
pin cannot be left
floating and must be tied to the input pin if not used.
NC (Pin 4): Not Connected.
OUT (Pin 5): Voltage Regulated Output. The OUT pin supplies power to the load. A minimum
output capacitor of 1μF is required to ensure stability. Larger output capacitors may be required
for applications with large transient loads to limit peak voltage transients. See the Applications
Information section for more information on output capacitance.
Typical Application Circuit
VIN
3.4V to 6.0V
IN OUT
1uF
OFF ON
SHDN
GND
VOUT
3.3V
1uF
________________________________________________________________________
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UM17525 전자부품, 판매, 대치품
Package Information
Outline Drawing
UM175XX
UM175XX: SOT23-5
Symbol
A
A1
A2
b
c
D
E
E1
e
e1
L
θ
DIMENSIONS
MILLIMETERS INCHES
Min
1.050
Max
1.250
Min Max
0.041 0.049
0.000 0.100 0.000 0.004
1.050 1.150 0.041 0.045
0.300 0.500 0.012 0.020
0.100 0.200 0.004 0.008
2.820 3.020 0.111 0.119
1.500 1.700 0.059 0.067
2.650 2.950 0.104 0.116
0.950REF
0.037REF
1.800 2.000 0.071 0.079
0.300 0.600 0.012 0.024
0° 8° 0° 8°
Land Pattern
Tape and Reel Orientation
NOTES:
1. Compound dimension: 2.92×1.60
2. Unit: mm;
3. General tolerance ±0.05mm unless otherwise
specified;
4. The layout is just for reference.
________________________________________________________________________
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