Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR3965
CMOS IC
1.5A LOW DROPOUT LINEAR
REGULATOR

DESCRIPTION
The UTC LR3965 belonged to low-noise, low-dropout, linear
regulators operate from 2.25V to 6V input and are guaranteed to
deliver 1.5A. Wide range of preset output voltage options are
available. Built-in low on-resistance transistor provides low dropout
voltage and large output current. The UTC LR3965 is designed and
optimized for battery-powered systems to work with low noise.
The UTC LR3965 consumes less than 0.01μA in shutdown
mode. Other features include ultra low dropout voltage, current
limiting protection, thermal shutdown protection and high ripple
rejection ratio.

FEATURES
* 1.5A Guaranteed Output Current
* 0.01μA Shutdown Current
* 40mV Dropout at 150mA Load
* Low Temperature Coefficient
* Current Limiting Protection
* Thermal Shutdown Protection
* Excellent Line/Load Transient
* Sense Option Improves Load Regulation

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
LR3965G-xx-AB3-C-R
LR3965G-xx-AA3-A-R
LR3965G-xx-AA3-D-R
LR3965L-xx-TN3-A-R
LR3965G-xx-TN3-A-R
LR3965L-xx-TN3-D-R
LR3965G-xx-TN3-D-R
LR3965L-xx-TQ2-A-R
LR3965G-xx-TQ2-A-R
LR3965L-xx-TQ2-A-T
LR3965G-xx-TQ2-A-T
LR3965L-xx-TQ2-D-R
LR3965G-xx-TQ2-D-R
LR3965L-xx-TQ2-D-T
LR3965G-xx-TQ2-D-T
LR3965L-xx-TN4-R
LR3965G-xx-TN4-R
LR3965L-xx-TN4-T
LR3965G-xx-TN4-T
LR3965L-xx-TN5-R
LR3965G-xx-TN5-R
LR3965L-xx-TN5-T
LR3965G-xx-TN5-T
LR3965L-xx-TQ5-R
LR3965G-xx-TQ5-R
LR3965L-xx-TQ5-T
LR3965G-xx-TQ5-T
LR3965G-xx-S08-R
Note: Pin Assignment: I: VIN O: VOUT
G: GND
Package
SOT-89
SOT-223
SOT-223
TO-252
TO-252
TO-263
TO-263
TO-263
TO-263
TO-252-4
TO-252-4
TO-252-5
TO-252-5
TO-263-5
TO-263-5
SOP-8
S: SHDN
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
1
G
G
I
G
I
G
G
I
I
S
S
S
S
S
S
S
2
I
O
G
O
G
O
O
G
G
I
I
I
I
I
I
I
Pin Assignment
3 4 5 6 7 8
O - - - - I - - - - O - - - - I - - - - O - - - - I - - - - I - - - - O - - - - O - - - - G O A - - G O A - - G O A - - G O A - - G O A - - G O A - - O A G G G G
Packing
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
A: ADJ/SENSE/SS/POK
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LR3965
CMOS IC

ORDERING INFORMATION(Cont.)

MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
SOT-223
SOT-89
:1.2V
:1.5V
:1.8V
:2.5V
:3.3V
:5.0V
Voltage Code
Pin Code
XX
LR3965G
XX
12
15
18
25
33
50
Date Code
1
2
3
TO-252
TO-263
TO-252-4
TO-252-5
TO-263-5
12 :1.2V
15 :1.5V
18 :1.8V
25 :2.5V
33 :3.3V
50 :5.0V
AD :ADJ
SOP-8
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
CMOS IC
PIN CONFIGURATION
1
GND
3
2
VIN
1
VIN
VOUT
SOT-89
5
4
3
2
1
2
GND
VOUT
GND
3
VOUT
SHDN 1
8 GND
VIN 2
7 GND
VOUT 3
6 GND
SENSE/ADJ/SS/POK 4
5 GND
SENSE/ADJ/SS/POK
VOUT
GND
VIN
SHDN
2
TO-252/TO-263
SOT-223
TO-252-4/TO-252-5/TO-263-5

1
VIN
3
SOP-8
PIN DESCRIPTION
PIN NAME
VIN
GND
SHDN
VOUT
ADJ
SENSE
SS
POK
DESCRIPTION
Power Input Voltage. Supply voltage can range from 2.25V to 6V. Bypass with a 68µF capacitor
to GND.
Ground
Active-Low Shutdown Input. A logic low at SHDN reduces supply current to 0.01µA. In
shutdown, the POK output is low. Connect SHDN to VIN for normal operation.
Output Voltage
Voltage-adjust Input. Connect ADJ to GND for preset output. Connect an external resistive
voltage-divider from VOUT to ADJ to set the output voltage between 0.8V and 6V. The ADJ
regulation voltage is 800mV
Remote sense pin.
Soft start time setting. For adjustable soft start time version, connect a capacitor from SS to gnd
to set the soft start time.
Open-Drain, Active-Low Power-OK Output. POK remains low while the output voltage (VOUT) is
below the POK threshold.
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
CMOS IC
BLOCK DIAGRAM
VIN
ON
OFF
SHDN
SHDN
Thermal
Sensor
Current Limit
UVLO
VOUT
SENSE
+
VREF
ERR AMP
SS
-
POK
+
-
93% VREF
+
ADJ
-
80mV
GND
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LR3965

CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°С, unless otherwise specified)
PARAMETER
RATINGS
UNIT
6.5
V
SOP-8
606
mW
SOT-223
714
mW
Power Dissipation SOT-89
PD
500
mW
TO-252/TO-252-5/TO-252-4
952
mW
TO-263/TO-263-5
1250
mW
Junction Temperature
TJ
+125
°С
Operating Temperature
TOPR
-40 ~ +85
°С
Storage Temperature
TSTG
-65 ~ +150
°С
Note: 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.
Supply Voltage

SYMBOL
VIN
THERMAL RESISTANCES CHARACTERISTICS
PARAMETER
SOP-8
SOT-223
Junction to Ambient SOT-89
TO-252/TO-252-5/TO-252-4
TO-263/TO-263-5
SOP-8
SOT-223
Junction to Case
SOT-89
TO-252/TO-252-5/TO-252-4
TO-263/TO-263-5
SYMBOL
UNISONIC TECHNOLOGIES CO., LTD
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θJA
θJC
RATINGS
165
150
180
112
64
20
15
50
12
4
UNIT
C/W
C/W
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
CMOS IC
ELECTRICAL CHARACTERISTICS
(TA= 25°C, VIN = VOUT + 1V or VIN =2.25V whichever is greater, CIN = 68µF, COUT =33µF, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNIT
Input Voltage
VIN
Note1
6
V
T
=25°С
,
I
=
1mA
~1.5A
-2
2
%
Output Voltage Accuracy
A
OUT
VOUT
(Preset Mode)
TA=0~85°С, IOUT= 1mA~1.5A
-3
3
%
Maximum Output Current
IOUT
1.5
A
Short-Circuit Current Limit
ILIMIT
VOUT=0V
2.5
A
IOUT = 0mA
200
µA
Ground Pin Current
IGND
IOUT= 1mA to 1.5A
250
µA
VOUT(NOM)<=1.8V
1000 1050
Dropout Voltage (Note 2)
VD
IOUT=1.5A
mV
1.8V<VOUT(NOM)
550
Line Regulation (Note 3)
Load Regulation (Note 3, 4)
Output Voltage Noise
Shutdown Supply Current
Shutdown Threshold
∆VOUT
∆VIN × VOUT
∆VOUT
eN
IOFF
VIN=VOUT+VD~6V
0.08
0.55
%/V
VIN=VOUT+VD, IOUT=10mA~1.5A
f=10Hz to1MHz, COUT=33μF
0.25
300
0.5
%
µVRMS
SHDN = GND
0.01
5
µA
VIH
VIL
TSHDN
DTSHDN
VREF
1.6
0.6
V
V
°С
°С
V
mV
V
mV
Thermal Shutdown Temperature
170
Thermal Shutdown Hysteresis
20
ADJ Voltage
Measured on ADJ, IOUT =10mA
0.774
0.8
0.826
ADJ Mode Threshold
80
Adjustable Output Voltage
0.8
5
POK Output Low Voltage
VOL
Sinking 2mA
5
50
Operating Voltage Range for
Sinking 100µA
1.0
5.5
V
Valid POK Output
POK Output High Leakage
VPOK=5.5V
100
nA
Current
POK Threshold
Rising edge, referred to VOUT(NOM)
90
93
96
%
Notes: 1. The minimum operating value for VIN is equal to either [VOUT(NOM)+VD] or 2.25V, whichever is greater.
2. Dropout voltage is defined as the voltage from the input to output when output is 2% below the nominal
value.
3. Output voltage line regulation is defined as the change in output voltage from the nominal value resulting
from a change in the input line voltage. Output voltage load regulation is defined as the change in output
voltage from the nominal value as the load current increases from no load to full load.
4. Regulation is measured at constant junction temperature by using a 20ms current pulse. Devices are
tested for load regulation in the load range from 10mA to 1.5A.
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LR3965

CMOS IC
TYPICAL APPLICATION CIRCUIT
VIN
VOUT
VIN
CIN
68µF
COUT
33µF
LR3965
VOUT
GND
VOUT
VIN
CIN +
68μF
ON
OFF
VOUT
VIN
LR3965
SENSE
SHDN
GND
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+
COUT
33µF
L
O
A
D
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LR3965

CMOS IC
TYPICAL APPLICATION CIRCUIT (Cont.)
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TYPICAL CHARACTERISTICS
Ambient Temperature vs.
Output Voltage Change
Output Voltage vs Input Voltage
3.0
0.25
2.0
Vout Votalge Change (%)
Output Voltage, VOUT (V)
0.00
IOUT=0mA
2.5
IOUT=1.5A
1.5
1.0
-0.25
-0.50
-0.75
-1.00
-1.25
-1.50
0.5
0.0
-1.75
LR3965-2.5V
0
1
2
3
4
5
-2.00
20 30 40 50 60 70 80 90 100 110120 130 140
6
Input Voltage, VIN (V)
Air Ambient Temperature(°С)
Drop-Out Voltage vs. Load Current
Ground Pin Current vs. Input Voltage
400
300
Ground Pin Current, IGND (µA)
350
Drop-Out (mV)
300
250
200
150
100
250
200
150
100
50
0
0
50
200 400 600 800 1000 1200 1400 1600
2
3
Line Transient
IOUT=100mA
IOUT=100mA
VOUT
VIN(V)
CIN=COUT=10μF(Ceramic,Y5V)
LR3965-2.5V
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4.0
VIN
3.0
2.0
VOUT(V)
VIN(V)
VIN
2.5
2.3
6
5.0
3.0
2.7
5
Line Transient
5.0
4.0
4
Input Voltage, VIN (V)
Output Current, IOUT (mA)
VOUT(V)

CMOS IC
VOUT
CIN=COUT=10μF(Ceramic,Y5V)
1.8
1.6
LR3965-1.8V
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
CMOS IC
TYPICAL CHARACTERISTICS (Cont.)
Shutdown
Load Transient
2.55
CIN=COUT=10μF(Ceramic,Y5V)
VOUT
2.5
2.45
LR3965-2.5V
5
VSHDN
0
2
1
1000
IOUT
500
100
0
0
LR3965-2.5V
ILOAD =1mA to 700mA
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VOUT
0
IOUT
CIN=COUT=10μF(Ceramic,Y5V)
VIN=5V,T=25°C
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