TLS203B0 V50
Linear Voltage Post Regulator
Low Dropout, Low Noise, 5V, 300mA
TLS203B0EJV50
TLS203B0LDV50
Data Sheet
Rev. 1.1, 2015-01-15
Automotive Power
Linear Voltage Post Regulator
Low Dropout, Low Noise, 5V, 300mA
TLS203B0EJV50
TLS203B0LDV50
1
Features
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Overview
Low Noise down to 42
µV
RMS
(BW = 10 Hz to 100 kHz)
300 mA Current Capability
Low Quiescent Current: 30 µA
Wide Input Voltage Range up to 20 V
Internal circuitry working down to 2.3 V
2.5% Output Voltage Accuracy (over full temperature and load range)
Low Dropout Voltage: 290 mV
Very low Shutdown Current: < 1 µA
No Protection Diodes needed
Fixed Output Voltage: 5.0 V
Stable with
≥
3.3 µF Output Capacitor
Stable with Aluminium, Tantalum or Ceramic Output Capacitors
Reverse Polarity Protection
No Reverse Current
Overcurrent and Overtemperature Protected
PG-DSO-8 Exposed Pad and PG-TSON-10 Exposed Pad Package
Suitable for use in Automotive Electronics as Post Regulator
Green Product (RoHS compliant)
AEC Qualified
PG-DSO-8 Exposed Pad
PG-TSON-10
The TLS203B0 V50 is a micropower, low noise, low dropout voltage 5 V regulator. The device is capable of
supplying an output current of 300 mA with a dropout voltage of 290 mV. Designed for use in battery-powered
systems, the low quiescent current of 30 µA makes it an ideal choice.
A key feature of the TLS203B0 V50 is its low output noise. By adding an external 10 nF bypass capacitor output
noise values down to 42
µV
RMS
over a 10 Hz to 100 kHz bandwidth can be reached. The TLS203B0 V50 voltage
regulator is stable with output capacitors as small as 3.3 µF. Small ceramic capacitors can be used without the
series resistance required by many other linear voltage regulators.
Internal protection circuitry includes reverse battery protection, current limiting and reverse current protection. The
TLS203B0 V50 comes as 5.0 V fixed output voltage variant and is available in a PG-DSO-8 Exposed Pad as well
as in a PG-TSON-10 Exposed Pad package.
Type
TLS203B0EJV50
TLS203B0LDV50
Data Sheet
Package
PG-DSO-8 Exposed Pad
PG-TSON-10
2
Marking
203B0V50
203B0V5
Rev. 1.1, 2015-01-15
TLS203B0EJV50
TLS203B0LDV50
Block Diagram
2
Block Diagram
Note: Pin numbers in block diagrams refer to the PG-DSO-8 Exposed Pad package type.
TLS203B0
I
8
Over Current
Protection
Saturation
Control
1
Temperature
Protection
Q
EN
5
Bias
BYP
4
Voltage
reference
Error
Amplifier
2
SENSE
6
GND
Figure 1
Block Diagram TLS203B0 V50
Data Sheet
3
Rev. 1.1, 2015-01-15
TLS203B0EJV50
TLS203B0LDV50
Pin Configuration
3
3.1
Pin Configuration
Pin Assignment
Q
SENSE
NC
BYP
1
2
3
9
4
8
7
6
5
I
NC
GND
EN
TLS203B0EJV50
Figure 2
Pin Configuration of TLS203B0EJV50 in PG-DSO-8 Exposed Pad
Q
Q
NC
SENSE
BYP
1
2
3
4
5
11
10
9
8
7
6
I
I
NC
EN
GND
TLS203B0LDV50
Figure 3
Pin Configuration of TLS203B0LDV50 in PG-TSON-10
Data Sheet
4
Rev. 1.1, 2015-01-15
TLS203B0EJV50
TLS203B0LDV50
Pin Configuration
3.2
Pin Definitions and Functions
Pin
Symbol
Function
Output.
Supplies power to the load. For this pin a minimum output capacitor of
3.3 µF is required to prevent oscillations. Larger output capacitors may be
required for applications with large transient loads in order to limit peak voltage
transients or when the regulator is applied in conjunction with a bypass capacitor.
For more details please refer to
“Application Information” on Page 19
.
Output Sense.
The SENSE pin is the input to the error amplifier. This allows to
achieve an optimized regulation performance in case of small voltage drops
R
p
that occur between regulator and load. In applications where such drops are
relevant they can be eliminated by connecting the SENSE pin directly at the load.
In standard configuration the SENSE pin can be directly connected to Q. For
further details please refer to the section
“Kelvin Sense Connection” on
Page 19
.
No Connect.
The NC Pins have no connection to any internal circuitry. Connect
either to GND or leave open.
Bypass.
The BYP pin is used to bypass the reference of the TLS203B0 V50 to
achieve low noise performance. The BYP-pin is clamped internally to ±0.6 V (i.e.
one
V
BE
). A small capacitor from the output Q to the BYP pin will bypass the
reference to lower the output voltage noise
1)
. If not used this pin must be left
unconnected.
Enable.
With the EN pin the TLS203B0 V50 can be put into a low power shutdown
state. The output will be off when the EN is pulled low. The EN pin can be driven
either by 3.3 V or 5 V logic or as well by open-collector logic with pull-up resistor.
The pull-up resistor is required to supply the pull-up current of the open-collector
gate
2)
and the EN pin current
3)
. Please note that if the EN pin is not used it must
be connected to
V
I
. It must not be left floating.
Ground.
Input.
The device is supplied by the input pin I. A capacitor at the input pin is
required if the device is more than 6 inches away from the main input filter
capacitor or if a non-negligible inductance is present at the input I
4)
. The
TLS203B0 V50 is designed to withstand reverse voltages on the input pin I with
respect to GND and output Q. In the case of reverse input (e.g. due to a wrongly
attached battery) the device will act as if there is a diode in series with its input. In
this way there will be no reverse current flowing into the regulator and no reverse
voltage will appear at the load. Hence, the device will protect both - the device
itself and the load.
Exposed Pad.
To ensure proper thermal performance, solder Pin 11 of TSON-10
to the PCB ground and tie directly to Pin 6. In the case of DSO-8 EP as well solder
Pin 9 (exposed pad) to the PCB ground and tie directly to Pin 6 (GND).
1 (DSO-8 EP)
1,2 (TSON-10)
Q
2 (DSO-8 EP)
4 (TSON-10)
SENSE
3, 7 (DSO-8 EP) NC
3, 8 (TSON-10)
4 (DSO-8 EP)
5 (TSON-10)
BYP
5 (DSO-8 EP)
7 (TSON-10)
EN
6 (DSO-8 EP)
6 (TSON-10)
GND
8 (DSO-8 EP)
I
9, 10 (TSON-10)
9 (DSO-8 EP)
11 (TSON-10)
1)
2)
3)
4)
Tab
A maximum value of 10 nF can be used for reducing output voltage noise over the bandwidth from 10 Hz to 100 kHz.
Normally several microamperes.
Typical value is 1 µA.
In general the output impedance of a battery rises with frequency, so it is advisable to include a bypass capacitor in battery-
powered circuits. Depending on actual conditions an input capacitor in the range of 1 to 10 µF is sufficient.
Data Sheet
5
Rev. 1.1, 2015-01-15
