UNISONIC TECHNOLOGIES CO., LTD
L1913
Preliminary
CMOS IC
150mA LOW-DROPOUT LINEAR
REGULATORS
DESCRIPTION
The UTC
L1913
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 250mA (TYP.) and 150mA
(MIN.).
The UTC
L1913
can be operated on the following two modes.
When the SET pin is connected to ground, the output of
L1913
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
L1913
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: 55µA
* Guaranteed 150mA Output Current
* Dropout Voltage is 70mV @ 50mA Load
* OTP (Over-Temperature Protection) and Short-Circuit Protection
* Two Modes Of Operation:
Fixed Mode: 3.3V，1.5V.
Adjustable Mode: 1.25V - 5.5V
* Maximum Supply Current In Shutdown Mode is Less than 1µA
* Low Output Noise at 220µ VRMS
* Stability with Lost Cost Ceramic Capacitors
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
L1913L-xx-AF5-R
L1913G-xx-AF5-R
xx: Output Voltage, refer to Marking Information.
Package
SOT-25
Packing
Tape Reel
Note:
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
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L1913
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
Preliminary
CMOS IC
MARKING
15:1.5V
SOT-25
33:3.3V
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
PIN NAME
SHDN
GND
IN
OUT
SET
DESCRIPTION
Active-Low Shutdown Input. A logic low reduces the supply current to less than 1µA.
Connect to IN for normal operation.
Ground. This pin also functions as a heatsink. Solder to large pads or the circuit board
ground plane to maximize thermal dissipation.
Regulator Input. Supply voltage can range from +2.5V to +5.5V. Bypass with 1µF to GND
Regulator Output. Fixed or adjustable from 1.25V to +5.5V. Sources up to 150mA.
Bypass with a 1µF, <0.2Ω typical ESR capacitor to GND.
Feedback Input for Setting the Output Voltage. Connect to GND to set the output voltage
to the preset voltage. Connect to an external resistor divider for adjustable-output
operation.
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QW-R502-439.b
L1913
BLOCK DIAGRAM
Preliminary
CMOS IC
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L1913
ABSOLUTE MAXIMUM RATING
Preliminary
CMOS IC
PARAMETER
SYMBOL
RATINGS
UNIT
Output Short-Circuit Duration
Infinite
V
IN
to GND
-0.3~7
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~(V
IN
+0.3)
V
Power Dissipation (T
A
=25°C)
P
D
520
mW
Junction Temperature
T
J
150
°C
Operating Temperature
T
OPR
-40~85
°C
Storage Temperature
T
STG
-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
Junction to Ambient
SYMBOL
θ
JA
RATINGS
240
UNIT
°C/W
ELECTRICAL CHARACTERISTICS
(V
IN
=+3.6V, V
SHDN
=V
IN
, T
A
=T
J
=+25°C, unless otherwise specified.) (Note 1)
PARAMETER
Input Voltage (Note 2)
Output Voltage Accuracy
Adjustable Output Voltage Range
(Note 3)
Maximum Output Current
Current Limit (Note 4)
Ground Pin Current
Dropout Voltage (Note 5)
SYMBOL
V
IN
V
OUT
V
OUT
I
LIMIT
I
Q
V
DROP
SET=GND
I
LOAD
=0mA
I
LOAD
=50mA
TEST CONDITIONS
Variation from specified V
OUT
,
I
OUT
=1mA
MIN
2.5
-2
V
SET
150
250
55
145
2
70
230
0.1
0.08
0.02
220
V
IN
-0.7
0.003
0.2
1.225
1.25
1.25
5
0.4
0.1
1
1.275
30
120
TYP
MAX
5.5
2
5.5
UNIT
V
%
V
mA
mA
µA
mV
300
0.28
%/V
0.4
0.8
1.0
%/mA
µV
RMS
Line Regulation
ΔV
LNR
Load Regulation
Output Voltage Noise
(10Hz~100kHZ)
SHUTDOWN
SHDN Input Threshold
SHDN Input Bias Current
Shutdown Supply Current
SET INPUT
SET Reference Voltage (Note 3)
SET Input Leakage Current
ΔV
LDR
eN
V
IH
V
IL
I
SHDN
I
QSHDN
V
SET
I
SET
I
OUT
=1mA
I
OUT
=50mA
I
OUT
=150mA
SET=GND, V
IN
=V
(STD)
+0.1V ~ 5.5V ,
I
OUT
=1mA
SET tide to OUT, V
IN
=2.5V ~ 5.5V ,
I
OUT
=1mA
SET tide to OUT
I
OUT
= 0mA ~150mA
SET=GND
V
IN
=1.2V,
C
OUT
=1µF
I
OUT
=150mA
Regulator enabled
Regulator shutdown
V
SHDN
= V
IN
T
A
= +25°C
V
OUT
= 0V
T
A
= +25°C
V
IN
= 2.5V ~ 5.5V,
I
OUT
= 1mA
T
A
= +25°C
T
A
= T
MIN
to T
MAX
V
SET
= 1.3V (Note 3) T
A
= +25°C
V
µA
µA
V
nA
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L1913
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNIT
THERMAL PROTECTION
Thermal Shutdown Temperature
T
SHDN
150
°C
Thermal Shutdown Hysteresis
ΔT
SHDN
15
°C
Notes: 1.Limits is 100% production tested at T
A
= +25°C. Low duty pulse techniques are used during test to maintain
junction temperature as close to ambient as possible.
2.Guaranteed by line regulation test.
3.Adjustable mode only.
4.Not tested. For design purposes, the current limit should be considered 150mA minimum to 420mA
maximum.
5.The dropout voltage is defined as (V
IN
-V
OUT
) when V
OUT
is 100mV below the value of V
OUT
for V
IN
= V
OUT
+2V.
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