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L1923 데이터시트 PDF




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부품번호 L1923 기능
기능 500mA HIGH PSRR LDO REGULATORS
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L1923 데이터시트, 핀배열, 회로
UNISONIC TECHNOLOGIES CO., LTD
L1923
Preliminary
500mA HIGH PSRR LDO
REGULATORS
CMOS IC
„ DESCRIPTION
5
The UTC L1923 is a low supply current, low dropout linear regulator.
It is operating at 2.5V - 5.5V. The supply current is as low as 55μA in
the no–load condition. In the shutdown mode, the maximum supply
current is less than 1μA.
A built-in over-temperature protection circuit is designed to protect
the device from being damaged by thermal overload. The over-current
protection limit is set at 800mA (TYP.)
The UTC L1923 can be operated on the following two modes. When
the SET pin is connected to ground, the output of L1923 is a pre-set
value and the external components are not needed to decide the
output voltage. When an output other than the preset value is needed,
two external resistors should be used as voltage dividers and then the
output voltage is decided by the resistor ratio.
The UTC L1923 is generally used in notebook computers, cellular
phones, PDAs, digital still camera and video recorders and other
hand-held devices.
„ FEATURES
* Low No-Load Supply Current: 90µA
* Guaranteed 500mA Output Current
* Dropout Voltage is 200mV @ 250mA Load
*OTP(Over-Temperature Protection) and Short-Circuit Protection
* Two Modes Of Operation:
Fixed Mode3.3V3.5V3.9V
Adjustable Mode: 1.25V - 5.5V
* Maximum Supply Current In Shutdown Mode is Less than 1µA
* Low Output Noise at 238µVRMS
* Stability with Lost Cost Ceramic Capacitors
„ ORDERING INFORMATION
Ordering Number
Package
L1923G-xx-AF5-R
SOT-25
Note: xx: Output Voltage, refer to Marking Information.
Packing
Tape Reel
L1923G-xx-AF5-R
www.DataSheet4U.com
(1)Packing Type
(2)Package Type
(3)Output Voltage Code
(4)Halogen Free
(1) R: Tape Reel
(2) AF5: SOT-25
(3) xx: Refer to Marking Information
(4) G: Halogen Free
4
123
SOT-25
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
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QW-R502-440.b




L1923 pdf, 반도체, 판매, 대치품
L1923
Preliminary
CMOS IC
„ ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
VIN to GND
Output Short-Circuit Duration
-0.3~7
Infinite
V
SET to GND
-0.3~7
V
SHDN to GND
-0.3~7
V
SHDN to IN
-7~0.3
V
OUT to GND
-0.3~(VIN+0.3)
V
Continuous Power Dissipation (TA=25°C)
PD
520 mW
Junction Temperature
TJ 150 °C
Operating Temperature
TOPR
-40~85
°C
Storage Temperature
TSTG
-65~160
°C
Notes: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
„ THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
Junction to Ambient
θJA 240 °C/W
„ ELECTRICAL CHARACTERISTICS
(VIN =+3.6V, VSHDN =VIN, TA =TJ =+25°C, unless otherwise specified.) (Note 1)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Input Voltage (Note 2)
Output Voltage Accuracy
Adjustable Output Voltage
Range (Note 3)
VIN
VOUT
VOUT
Variation from specified VOUT, IOUT=1mA
2.5
-2
VSET
5.5 V
2%
5.5 V
Maximum Output Current
500 mA
Current Limit (Note 4)
Short Circuit Current
ILIMIT
Isc
600 800
120
mA
mA
Ground Pin Current
IQ
90 120 µA
Dropout Voltage (Note 5)
Line Regulation
Load Regulation
Ripple Rejection
Output Noise
SHUTDOWN
VDROP
ΔVLNR
ΔVLDR
PSRR
Noise
IOUT=250mA
IOUT=500mA
SET=GND, VIN=V(STD)+0.1V ~ 5.5V ,
IOUT=10mA
IOUT= 10mA ~500mA
F=100Hz, 0.45VP-P, IOUT=10mA
F100kHz, IOUT =0A
F100kHz, IOUT =250mA
F100kHz, IOUT =500mA
200
400 500
mV
0.06 0.12 %/V
0.02 0.1 %/mA
65 dB
136
238
253
µV
(RMS)
SHDN Input Threshold
SHDN Input Bias Current
Shutdown Supply Current
SET INPUT
VIH
VIL
ISHDN
IQSHDN
Regulator enabled
Regulator shutdown
VSHDN= VIN
VOUT= 0V
TA= +25°C
TA= +25°C
1.5
0.4
0.003 0.1
0.2 1
V
µA
µA
SET Reference Voltage (Note 3)
SET Input Leakage Current
(Note 3)
VSET
ISET
VIN= 2.5V ~ 5.5V,
IOUT= 1mA
VSET= 1.3V
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
1.225
1.25 1.275
1.25
5 30
V
nA
THERMAL PROTECTION
Thermal Shutdown Temperature TSHDN
145 °C
Thermal Shutdown Hysteresis ΔTSHDN
25 °C
Notes: 1.Limits is 100% production tested at TA= +25°C. Low duty pulse techniques are used during test to maintain
www.DataSheet24.UjGu.nuccaotrmiaonnteteemd pbeyralintuerereagsuclalotisoen
to ambient
test.
as
possible.
3.Adjustable mode only.
4.Not tested. For design purposes, the current limit should be considered 600mA minimum to 800mA
maximum.
5.The dropout voltage is defined as (VIN-VOUT) when VOUT is 100mV below the target value of VOUT.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-440.b

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L1923 전자부품, 판매, 대치품
L1923
Preliminary
„ TYPICAL APPLICATION CIRCUIT
+
BATTERY
-
CIN
SHDN
OUT
UTC
L1923
IN SET
GND
CMOS IC
OUTPUT
COUT
4.7µ
+ CIN
BATTERY -
Fixed Mode
SHDN
OUT
OUTPUT
UTC
L1923
R1 COUT
IN SET
4.7µ
GND
R2
Adjustable Mode
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
www.DataSohtheeetr4Upa.croammeters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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