TS1540
1A Low Dropout Voltage Regulator
with Low Quiescent Current
TO-252
(DPAK)
Pin Definition:
1. Output
2. Ground
3. Input
General Description
TS1540 of high current LDOs has been developed for portable application where low quiescent current is an important
requirement. The device features excellent line and load transient response which does not exceed 10% of nominal
output value for full operating temperature range even during power ON cycle and short circuit removal. Internally
trimmed, temperature compensated bandgap reference guarantees 2.5% accuracy for full range of input voltage, output
current and temperature. Included on the chip are accurate current limit and thermal shutdown protection. Device
stability is achieved with only two external low ESR ceramic capacitors.
Features
●
●
●
●
●
●
●
Very Low Ground Current (I
GND
= 1mA)
Excellent Line Regulation
Excellent Load Regulation
Very Low transient Overshoot
Stable with low ESR output Capacitor (ESR = 0mΩ)
Thermal Shutdown
Current Limit
Ordering Information
Part No.
Package
Packing
TS1540CPxx RO
TO-252
2.5Kpcs / 13” Reel
Note: Where
xx
denotes voltage option, available are
50=
5.0V
33=
3.3V
25=
2.5V
18=
1.8V
15=
1.5V
Leave blank for adjustable version.
Application
●
●
●
Disk Drive Circuits
Desktop Computers
Laptop, Notebook Computers
Typical Application Circuit
Block Diagram
Fixed Output Voltage Version
V
OUT
= V
REF
(1+R2/R1) + I
adj
R2
Adjustable Output Voltage Version
Note:
1. Use Low ESR Capacitors.
2. C
IN
should be placed as closed to V
IN
as possible
1/4
Version: A07
TS1540
1A Low Dropout Voltage Regulator
with Low Quiescent Current
Absolute Maximum Rating
(Note 1)
Parameter
Input Supply Voltage
Recommend Operation Input Supply Voltage
Power Dissipation (Note 2)
Thermal Resistance Junction to Ambient
Operating Temperature Range
Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature (260 C)
o
Symbol
V
IN
V
IN
(Opr. Typ.)
P
D
Ө
JA
T
OPER
T
J
T
STG
Limit
15
12
Internal limited
105
0 ~ +125
+150
-65 ~ +150
5
Unit
V
V
o
C/W
o
C
S
Electrical Specification
(
Ta = 25
o
C, unless otherwise specified.)
Parameter
Reference Voltage
Conditions
V
IN
= 2.75, Io= 1A
V
IN
= 3V ~ 12V, Io= 1A
V
IN
= 3.3V ~ 12V, Io= 1A
Min
1.225
1.470
1.764
2.450
3.235
4.900
--
--
--
--
--
--
--
Typ
1.25
1.5
1.8
2.5
3.3
5.0
2
30
1.0
2.5
90
1.8
0.5
Max
1.275
1.530
1.836
2.550
3.366
5.100
15
40
1.2
5
--
--
--
Unit
V
V
V
V
V
V
mV
mV
V
mA
uA
A
%
Output Voltage (Note 4)
V
IN
= 4V ~ 12V, Io= 1A
V
IN
= 4.8V ~ 12V, Io= 1A
V
IN
= 6.5V ~ 12V, Io= 1A
Line Regulation
Load Regulation (Note 1,2)
Dropout Voltage
Quiescent Current
Adjustable Pin Current
Output Current Limit
Temperature Stability
Ripple Rejection
Vo+1.5V
≤
V
IN
≤
12V, Io= 10mA
V
IN
= V
OUT
+1.5V
Io= 10mA ~ 1.0A
Io= 1A,
∆V
OUT
= 1% V
OUT
V
IN
= 5V
V
IN
- V
OUT
= 3V
Io=10mA,
F= 120Hz, Io= 1A, C
OUT
= 10uF,
--
60
70
dB
V
IN
= Vout+3V
Note 1: See thermal regulation specification for changes in output voltage due to heating effects. Line and load
regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is
measured at the output lead = 1/18” from the package.
Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 10W. Power dissipation is
determined by the input / output voltage difference and the output current. Guaranteed maximum power
dissipation will not be available over the full input / output voltage range.
Note 3: Quiescent current is defined as the minimum output current required to maintain the regulation.
Note 4: The Output Capacitor does not have a theoretical upper limit and increasing its value will increase stability
C
OUT
=100uF or more is typical for high current regulator design.
2/4
Version: A07
TS1540
1A Low Dropout Voltage Regulator
with Low Quiescent Current
TO-252 Mechanical Drawing
TO-252 DIMENSION
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX
2.3BSC
0.09BSC
4.6BSC
0.18BSC
6.80
7.20
0.268
0.283
5.40
5.60
0.213
0.220
6.40
6.65
0.252
0.262
2.20
2.40
0.087
0.094
0.00
0.20
0.000
0.008
5.20
5.40
0.205
0.213
0.75
0.85
0.030
0.033
0.55
0.65
0.022
0.026
0.35
0.65
0.014
0.026
0.90
1.50
0.035
0.059
2.20
2.80
0.087
0.110
0.50
1.10
0.020
0.043
0.90
1.50
0.035
0.059
1.30
1.70
0.051
0.67
DIM
A
A1
B
C
D
E
F
G
G1
G2
H
I
J
K
L
M
Marking Diagram
Y
M
= Year Code
= Month Code
(A=Jan,
B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
= Lot Code
= Voltage Code
(15=1.5V,
18=1.8V, 25=2.5V, 33=3.3V, 50=5V)
= Package code for Adjustable type
(CP = TO-252)
L
XX
3/4
Version: A07
TS1540
1A Low Dropout Voltage Regulator
with Low Quiescent Current
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,
assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, to any
intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for
such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale
and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability,
or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers
using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for
any damages resulting from such improper use or sale.
4/4
Version: A07
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