Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR2965
Preliminary
CMOS IC
1.5A, LOW DROPOUT
REGULATOR WITH POWER
GOOD

DESCRIPTION
The UTC LR2965 is CMOS-based positive voltage and a very
low dropout regulator IC that minimum input voltage is 2.5V and is
capable of delivering the continuous output load current up to 1.5A.
It has features of low dropout (maximum 300mV at 1A), a very
low quiescent current (typically 300uA at 0.1A) and very high
PSRR up to 86dB at 1A load current.
The output voltage can be set from 0.5V to (VIN - VD) with an
external resistor divider and it has ±2% accuracy through all
temperature ranges include the line as well as load variations. It is
allowed to use a small 4.7μF MLCC input and output capacitor to
deliver the current with the stable operation.
Built-in Soft-Start function reduces the inrush current and the
other features are include over current protection (OCP),
short-circuit protection (SCP), and thermal shut down protection
(TSD).

FEATURES
* Input Voltage Range: 2.5V~6.0V
* Supply Current : (Typ.) 300uA
* Current limit : (Min.) 1.8A
* Adjustable Output from 0.5V
* LR2965: Typ 0.4V Dropout @ IOUT=1.5A
* Compatible with MLCC Capacitors
* Built-in Soft-Start Limits Inrush Current
* Built-in Thermal Shutdown Protection
* Built-in Over Current & Short Circuit Protection

ORDERING INFORMATION
Ordering Number
Note:
LR2965G-xx-SH2-R
xx: Output Voltage, refer to Marking Information.
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
Package
Packing
HSOP-8
Tape Reel
1 of 5
QW-R102-061.a
LR2965


Preliminary
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
HSOP-8
25: 2.5V
AD: ADJ
MARKING
PIN CONFIGURATION
OUT 1
1
OUT 2
2
8
VIN
7
VIN
GND


FB
3
6
EN
GND
4
5
PG
PIN DESCRIPTION
PIN NO.
1, 2
PIN NAME
OUT
3
FB
4
5
6
7,8
GND
PG
EN
VIN
DESCRIPTION
Voltage Regulator Output Pin
Feedback Pin. Connect to output through a voltage-divider to set the output.
Recommended that the tolerance of feedback resistors is below 1%.
Ground Pin
Open Drain Power-Good (PG) Output.
Chip Enable Pin
Input Supply Voltage Pin.
BLOCK DIAGRAM
VIN
EN
Reference
(0.5V)
Error
AMP
OUT
OCP/TSD
GND
FB
PG
Power Good
Control
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 5
QW-R102-061.a
LR2965

Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
-0.3~7
V
Output Voltage
OUT
-0.3~VIN+0.3
V
Junction Temperature
TJ
150
°C
Storage Temperature
TSTG
-65~150
°C
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.

RECOMMENDED OPERATING CONDITIONS
PARAMETER
Input Voltage Range
Ambient Temperature Range

SYMBOL
VIN
TA
RATINGS
2.5~6.0
-40~85
UNIT
V
°C
THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case
SYMBOL
θJA
θJC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
RATINGS
50
10
UNIT
°C/W
°C/W
3 of 5
QW-R102-061.a
LR2965

Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS
All parameters are guaranteed over the operational supply voltage and temperature range. Operating conditions
unless otherwise noted are: VIN=5V, OUT=2.5V and TA=25°C. Typical values are for information only.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNIT
Supply Voltage
Quiescent Current
IQ
IOUT=100mA
300
uA
Shutdown Current
ISTD
VIN=6V, VEN=GND
0.2
2
uA
Feedback (FB)
Feedback Voltage Accuracy
VF
IOUT=10mA, TA =25°C
490
500
510
mV
Input Bias Current
IF
VFB=0.5V, VIN =6V
0.001 0.1
uA
Output (OUT)
Output Accuracy
VOUT
-2
2
%
Load Regulation
RLO
IOUT=1mA to 1.5A
0.1
2
%/A
Line Regulation
RLN
VIN=2.2~6V, VOUT=1.225V, IOUT=1mA
-0.2
0.2
%/V
IOUT=1.5A,VFB=480mV
400
Dropout Voltage
VD
IOUT=1A,VFB=480mV
140
280
mV
IOUT=0.5A,VFB=480mV
200
Current Limit
IC
1.8
A
Load transient (Note 1)
LOT
IOUT=20mA to 1.5A,
3
%
Line Transient (Note 1)
RNT
∆VIN=0.5V
3
%
Enable (EN))
VENH
EN rising, VIN=OUT+1V~6V
1.2
6
V
Input Threshold
VENL
EN falling, VIN=OUT+1V~6V
0.4
Input Bias Current
IEN
EN=0 or 6V
-1
0
1
uA
Power Good (PG)
PV1
FB high, VHYS=10mV, VIN=OUT+1V~6V
550
mV
Threshold Voltage
PV2
FB low, VHYS=10mV, VIN=OUT+1V~6V
400
mV
Output Voltage Low
PCL
FB=0.4V or 0.6V, IPG=1mA
25
200
mV
Output Current High
PCH
PWRGD=6V
0.001 0.1
uA
Rising Delay Time
PRDT
From FB*90% to PG
10
us
Falling Delay Time 1
PFDT1 VIN=2.5V, From FB to PG
20
70
120
us
Falling Delay Time 2
PFDT2 VIN=6V, From FB to PG
60
180
300
us
Thermal Shutdown (TSD) (Note 1)
TSDON TSD On
165
TSD Threshold
TSDOFF TSD Off
145
Note: Guaranteed by design but not production tested.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 5
QW-R102-061.a
LR2965

Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
EN
5V
2.5V
OUT
4.7µF
VIN
100kΩ
40kΩ
FB
4.7µF
10kΩ
PG
GND
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
other parameters) 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
5 of 5
QW-R102-061.a
Similar pages