LR2965 [UTC]
1.5A, LOW DROPOUT REGULATOR WITH POWER GOOD;
| 型号： | LR2965 |
| 厂家： | 
Unisonic Technologies |
| 描述： | 1.5A, LOW DROPOUT REGULATOR WITH POWER GOOD |
| 文件： | 总5页 (文件大小：176K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LR2965
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
Package
HSOP-8
Packing
Tape Reel
Lead Free
Halogen Free
LR2965G-xx-SH2-R
LR2965L-xx-SH2-R
Note: xx: Output Voltage, refer to Marking Information.
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LR2965
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
25: 2.5V
AD: ADJ
HSOP-8
PIN CONFIGURATION
1
OUT 1
OUT 2
8
7
VIN
VIN
2
3
4
GND
6
5
EN
PG
FB
GND
PIN DESCRIPTION
PIN NO.
1, 2
PIN NAME
OUT
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
3
FB
4
5
GND
PG
Open Drain Power-Good (PG) Output.
Chip Enable Pin
6
EN
7,8
VIN
Input Supply Voltage Pin.
BLOCK DIAGRAM
VIN
Reference
(0.5V)
EN
Error
AMP
OUT
FB
OCP/TSD
GND
PG
Power Good
Control
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LR2965
CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
VIN
RATINGS
-0.3 ~ 7
UNIT
V
Input Voltage
Output Voltage
OUT
TJ
-0.3 ~ VIN+0.3
+150
V
Junction Temperature
Storage Temperature
°C
°C
TSTG
-65 ~ +150
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
SYMBOL
VIN
RATINGS
2.5 ~ 6.0
-40 ~ 85
UNIT
V
Input Voltage Range
Ambient Temperature Range
TA
°C
THERMAL DATA
PARAMETER
SYMBOL
θJA
RATINGS
UNIT
°C/W
°C/W
Junction to Ambient
Junction to Case
90
45
θJC
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LR2965
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
Supply Voltage
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNIT
Quiescent Current
Shutdown Current
Feedback (FB)
IQ
IOUT=100mA
300
0.2
uA
uA
ISTD
VIN=6V, VEN=GND
2
Feedback Voltage Accuracy
Input Bias Current
Output (OUT)
VF
IF
IOUT=10mA, TA =25°C
VFB=0.5V, VIN =6V
490
500
510
mV
uA
0.001 0.1
Output Accuracy
Load Regulation
Line Regulation
VOUT
RLO
RLN
-2
2
%
IOUT=1mA to 1.5A
0.1
2
%/A
%/V
VIN=2.2~6V, VOUT=1.225V, IOUT=1mA
IOUT=1.5A,VFB=480mV
IOUT=1A,VFB=480mV
-0.2
0.2
400
140
Dropout Voltage
VD
mV
280
200
IOUT=0.5A,VFB=480mV
Current Limit
IC
1.8
A
Load transient (Note 1)
Line Transient (Note 1)
Enable (EN))
LOT
RNT
IOUT=20mA to 1.5A,
3
3
%
%
∆VIN=0.5V
VENH
VENL
IEN
EN rising, VIN=OUT+1V~6V
EN falling, VIN=OUT+1V~6V
EN=0 or 6V
1.2
-1
6
0.4
1
V
Input Threshold
Input Bias Current
Power Good (PG)
0
uA
PV1
PV2
FB high, VHYS=10mV, VIN=OUT+1V~6V
FB low, VHYS=10mV, VIN=OUT+1V~6V
FB=0.4V or 0.6V, IPG=1mA
PWRGD=6V
550
400
25
mV
mV
mV
uA
us
Threshold Voltage
Output Voltage Low
PCL
200
Output Current High
PCH
PRDT
0.001 0.1
10
Rising Delay Time
From FB*90% to PG
Falling Delay Time 1
Falling Delay Time 2
Thermal Shutdown (TSD) (Note 1)
PFDT1 VIN=2.5V, From FB to PG
20
60
70
120
300
us
PFDT2 VIN=6V, From FB to PG
180
us
TSDON TSD On
TSDOFF TSD Off
165
145
TSD Threshold
Note: Guaranteed by design but not production tested.
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LR2965
CMOS IC
TYPICAL APPLICATION CIRCUIT
2.5V
EN
VIN
OUT
4.7µF
5V
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.
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