OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regu lator
Features
•
70 mA output current capability
•
Very tight output tracking tolerance to reference
•
Output voltage adjustable down to 2.0 V
•
Stable operation with 1 µF ceramic output capacitor
•
Flexibility of output voltage adjust higher or lower than reference,
proportional to the reference voltage (version GA / EJ A)
•
Status output to indicate short circuits at the output (version GS / EJ S)
•
Very low dropout voltage of typ. 0.2 V @ maximum output current
•
Combined reference / enable input
•
Very low current consumption in OFF mode
•
Wide input voltage range -20 V ≤ VI ≤ +45 V
•
Wide temperature range: -40 °C ≤ Tj ≤ 150 °C
•
Output protected against short circuit to GND and battery
•
Input protected against reverse polarity
•
Overtemperature protection
•
Green product (RoHS compliant)
PG-DSO-8
PG-DSO-8
exposed pad
Potential applications
General automotive applications.
Product validation
Qualified for automotive applications. Product validation according to AEC-Q100/101.
Description
The OPTIREG™ linear TLE4254 is a monolithic integrated low-dropout voltage tracking regulator with high
accuracy in small PG-DSO-8 packages. The IC is designed to supply off-board systems, e. g. sensors in
powertrain management systems under the severe conditions of automotive applications. Therefore, the IC is
equipped with additional protection functions against reverse polarity and short circuit to GND and battery.
With supply voltages up to 40 V, the output voltage follows a reference voltage applied at the adjust input with
very high accuracy. The reference voltage applied directly to the adjust input or by an e. g. external resistor
divider can be 2.0 V at minimum.
Datasheet
www.infineon.com/OPTIREG-linear
1
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
The output is able to drive loads up to 70 mA while the device follows with high accuracy the e. g. 5 V output
of a main voltage regulator acting as reference.
The TLE4254 can be set into shutdown mode in order to reduce the current consumption to a minimum. This
suits the IC for low power battery applications.
Versions “GS” and “EJ S” offer an open collector status output indicating an overvoltage and undervoltage
error condition of the output voltage.
Versions “GA” and “EJ A” allow setting the output voltage to higher value than the reference voltage by
connecting a voltage divider to the feedback pin “FB”.
Type
Package
Marking
TLE4254GA
PG-DSO-8
4254GA
TLE4254GS
PG-DSO-8
4254GS
TLE4254EJA
PG-DSO-8 exposed pad
4254EJA
TLE4254EJS
PG-DSO-8 exposed pad
4254EJS
Datasheet
2
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Table of contents
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Potential applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Product validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
2.1
2.2
2.3
2.4
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin assignment TLE4254GA and TLE4254EJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin definitions and functions TLE4254GA and TLE4254GS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin assignment TLE4254EJA and TLE4254EJS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin definitions and functions TLE4254EJA and TLE4254EJS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
5
5
6
6
3
3.1
3.2
3.3
General product characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
7
8
8
4
4.1
4.1.1
4.1.2
4.2
4.2.1
4.2.2
4.3
4.3.1
4.3.2
4.4
4.4.1
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Tracking regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical characteristics tracking regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Typical performance characteristics tracking regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electrical characteristics current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Typical performance characteristics current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Adjust/enable input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Electrical characteristics adjust/enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Typical performance characteristics adjust/enable input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Status output (version GS/EJS only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Electrical characteristics status output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Datasheet
3
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Block diagram
1
Block diagram
Saturation
Control and
Protection
circuits
Temperature
control
I
Q
-
TLE4254GA
TLE4254EJ A
FB
+
EN/
ADJ
+
typ.
1.4V
=
GND
Figure 1
Block diagram TLE4254GA and TLE4254EJA
Saturation
Control and
Protection
circuits
Temperature
control
I
Q
-
TLE4254GS
TLE4254EJ S
Status
Generator
ST
+
EN/
ADJ
+
typ.
1.4V
=
GND
Figure 2
Datasheet
Block diagram TLE4254GS and TLE4254EJS
4
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Pin configuration
2
Pin configuration
2.1
Pin assignment TLE4254GA and TLE4254EJA
Q
1
8
I
Q
1
8
I
GND
2
7
GND
GND
2
7
GND
GND
3
6
GND
GND
3
6
GND
FB
4
5
EN/ADJ
ST
4
5
EN/ADJ
TLE4254GA
Figure 3
TLE4254GS
Pin configurations TLE4254GA and TLE4254GS
2.2
Pin definitions and functions TLE4254GA and TLE4254GS
Table 1
Pin functions TLE4254GA and TLE4254GS
Pin
Symbol
Function
1
Q
Tracker output
Block to GND with a capacitor close to the IC terminals, respecting capacitance and
ESR requirements given in the table “Functional Range”.
2, 3, 6, 7 GND
Ground reference
Interconnect the pins on PCB. Connect to heatsink area.
4
FB
Feedback input (version GA only)
(version GA) Inverting input of the internal error amplifier to control the output voltage.
Connect this pin directly to the output pin in order to obtain lower or equal output
voltages with respect to the reference voltage.
Connect a voltage divider for higher output voltages than the reference.
(See also Chapter 5.)
4
ST
Tracking regulator status output (version GS only)
(version GS) Open collector output. Connect via a pull-up resistor to a positive voltage rail.
A low signal indicates fault conditions at the regulator’s output.
5
EN/ADJ
Adjust/enable
Connect the reference to this pin. The active high signal of the reference turns on the
device; a low signal disables the IC. The reference voltage can be connected directly or
by a voltage divider for lower output voltages (see Chapter 5).
8
I
Input
IC supply. For compensating line influences, a capacitor close to the IC terminals is
recommended.
Datasheet
5
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Pin configuration
2.3
Pin assignment TLE4254EJA and TLE4254EJS
Q
1
n.c.
2
8
I
7
n.c.
Q
1
n.c.
2
TLE4254EJ A
3
6
GND
FB
4
5
EN/ADJ
2.4
I
7
n.c.
TLE4254EJ S
n.c.
Figure 4
8
n.c.
3
6
GND
ST
4
5
EN/ADJ
Pin configurations TLE4254EJA and TLE4254EJS
Pin definitions and functions TLE4254EJA and TLE4254EJS
Table 2
Pin functions TLE4254EJA and TLE4254EJS
Pin
Symbol
Function
1
Q
Tracker output
Block to GND with a capacitor close to the IC terminals, respecting capacitance and
ESR requirements given in the table “Functional Range”.
2, 3, 7 n.c.
Not connected
Connect to GND.
4
FB
Feedback input (version EJA only)
(version EJA) Inverting input of the internal error amplifier to control the output voltage.
Connect this pin directly to the output pin in order to obtain lower or equal output
voltages with respect to the reference voltage.
Connect a voltage divider for higher output voltages than the reference.
(See also Chapter 5.)
4
ST
Tracking regulator status output (version EJS only)
(version EJS) Open collector output. Connect via a pull-up resistor to a positive voltage rail.
A low signal indicates fault conditions at the regulator’s output.
5
EN/ADJ
Adjust/enable
Connect the reference to this pin. The active high signal of the reference turns on the
device; a low signal disables the IC. The reference voltage can be connected directly or
by a voltage divider for lower output voltages (see Chapter 5).
6
GND
Ground reference
Interconnect the pins on PCB. Connect to heatsink area.
8
I
Input
IC supply. For compensating line influences, a capacitor close to the IC terminals is
recommended.
Pad
–
Exposed pad
Connect to GND.
Datasheet
6
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
General product characteristics
3
General product characteristics
3.1
Absolute maximum ratings
Table 3
Absolute maximum ratings 1)
Tj = -40°C to 150°C; all voltages with respect to ground (unless otherwise specified)
Parameter
Symbol
Values
Unit Note or Test Condition Number
Min.
Typ.
Max.
Voltages
Input voltage
VI
-20
–
45
V
P_4.1.1
Adjust/enable input voltage
VADJ/EN
-20
–
45
V
P_4.1.2
Output voltage
VQ
-5
–
45
V
P_4.1.3
Feedback input voltage
(version GA/EJA)
VFB
-20
–
45
V
P_4.1.4
Status output voltage
(version GS/EJS)
VST
-0.3
–
7
V
P_4.1.5
Junction temperature
Tj
-40
–
150
°C
P_4.1.6
Storage temperature
Tstg
-50
–
150
°C
P_4.1.7
|VESD,HBM| 4
–
–
kV
HBM 2)
P_4.1.8
|VESD,CDM| 1
–
–
kV
CDM 3)
P_4.1.9
Temperatures
ESD Rating
ESD susceptibility
1) Not subject to production test, specified by design
2) ESD susceptibility Human Body Model “HBM” according to AEC-Q100-002 - JESD22-A114.
3) ESD susceptibility Charged Device Model “CDM” according to ESDA STM5.3.1
Notes
1. Stresses above the ones listed here may cause permanent damage to the device. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
2. Integrated protection functions are designed to prevent IC destruction under fault conditions described in the
datasheet. Fault conditions are considered as “outside” normal operating range. Protection functions are not
designed for continuous repetitive operation.
Datasheet
7
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
General product characteristics
3.2
Functional range
Table 4
Functional range
Parameter
Symbol
Values
Min.
Typ.
Max.
Unit
Note or Test Condition Number
Input voltage
VI
4
–
45
V
VI ≥ VQ + VDr
P_4.2.1
Adjust/enable input voltage
(voltage tracking range)
VADJ/EN
2.0
–
–
V
–
P_4.2.5
Junction temperature
Tj
-40
–
150
°C
–
P_4.2.2
Output capacitor
CQ
1
–
–
µF
1)
P_4.2.3
Ω
1)
P_4.2.4
ESRCQ
–
–
5
1) Not subject to production test; specified by design.
Note:
Within the functional range the IC operates as described in the circuit description. The electrical
characteristics are specified within the conditions given in the related electrical characteristics
table.
3.3
Thermal resistance
Table 5
Thermal resistance
Parameter
Symbol
Values
Unit Note or Test Condition
Min.
Typ.
Max.
–
155
–
Number
PG-DSO-8
Junction to ambient
RthJA
–
96
–
K/W
Footprint only 1)2)
K/W
2
1)2)
P_4.3.2
2
1)2)
P_4.3.3
300 mm PCB heatsink area
–
86
–
K/W
600 mm PCB heatsink area
P_4.3.1
PG-DSO-8 exposed pad
Junction to case
RthJC
–
15
–
K/W
Measured to exposed pad
P_4.3.4
Junction to ambient
RthJA
–
47
–
K/W
3)
P_4.3.5
–
159
–
K/W
Footprint only
2
1)2)
P_4.3.6
1)2)
P_4.3.7
P_4.3.8
–
71
–
K/W
300 mm PCB heatsink area
–
60
–
K/W
600 mm2 PCB heatsink area 1)2)
1) Not subject to production test; specified by design.
2) Package mounted on PCB FR4; 80 × 80 × 1.5 mm3; 35 µm Cu, 5 µm Sn; horizontal position; zero airflow.
3) Specified RthJA value is according to Jedec JESD51-2,-5,-7 at natural convection on FR4 2s2p board; the product
(chip+package) was simulated on a 76.2 × 114.3 × 1.5 mm3 board with 2 inner copper layers (2 × 70 µm Cu,
2 × 35 µm Cu). Where applicable a thermal via array under the exposed pad contacted the first inner copper layer.
Datasheet
8
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
4
Functional description
4.1
Tracking regulator
The output voltage VQ is controlled by comparing it to the voltage applied at pin ADJ/EN and driving a PNP
pass transistor accordingly. The control loop stability depends on the output capacitor CQ, the load current,
the chip temperature and the poles/zeros introduced by the integrated circuit and the load. To ensure stable
operation, the output capacitor’s capacitance and its equivalent series resistor ESR requirements given in the
table “Functional Range” have to be maintained. For details see also the typical performance graph Output
capacitor series resistor ESRCQ vs. output current IQ. Also, the output capacitor shall be sized to buffer
load transients.
An input capacitor CI is strongly recommended to buffer line influences. Connect the capacitors close to the IC
terminals.
Protection circuitry prevent the IC as well as the application from destruction in case of catastrophic events.
These safeguards contain output current limitation, reverse polarity protection as well as thermal shutdown
in case of overtemperature.
In order to avoid excessive power dissipation that could never be handled by the pass element and the
package, the maximum output current is decreased at high input voltages.
The overtemperature protection circuit prevents the IC from immediate destruction under fault conditions
(e.g. output continuously short-circuited) by reducing the output current. A thermal balance below 200°C
junction temperature is established. Please note that a junction temperature above 150°C is outside the
maximum ratings and reduces the IC lifetime.
The TLE4254 allows a negative supply voltage. However, several small currents are flowing into the IC
increasing its junction temperature. This has to be considered for the thermal design, respecting that the
thermal protection circuit is not operating during reverse polarity condition.
Datasheet
9
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
4.1.1
Table 6
Electrical characteristics tracking regulator
Electrical characteristics tracking regulator
VI = 13.5 V; VADJ/EN ≥ 2.0 V; VFB = VQ (version GA/EJA); Tj = -40°C to 150°C; CQ = 1 µF;
all voltages with respect to ground (unless otherwise specified)
Parameter
Output voltage tracking
accuracy
∆VQ = VEN/ADJ - VQ
Symbol
∆VQ
Values
Unit Note or Test Condition
Number
Min.
Typ.
Max.
-5
–
5
mV
8 V ≤ VI ≤ 18 V;
0.1 mA ≤ IQ ≤ 60 mA;
VADJ/EN = 5 V
P_5.1.1
-10
–
10
mV
5.5 V ≤ VI ≤ 26 V;
0.1 mA ≤ IQ ≤ 60 mA;
VADJ/EN = 5 V
P_5.1.2
-10
–
10
mV
5.5 V ≤ VI ≤ 32 V;
0.1 mA ≤ IQ ≤ 30 mA;
VADJ/EN = 5 V
P_5.1.3
Load regulation
steady-state
|∆VQ,load| –
1
10
mV
IQ = 0.1 mA to 70 mA;
VADJ/EN = 5 V
P_5.1.4
Line regulation
steady-state
|∆VQ,line|
–
1
10
mV
VI = 5.5 V to 32 V;
IQ = 5 mA;
VADJ/EN = 5 V
P_5.1.5
Power supply ripple
rejection
PSRR
60
–
–
dB
fripple = 100 Hz;
Vripple = 1 Vpp;
IQ = 5 mA;
CQ = 10 µF, ceramic type 1)
P_5.1.6
Dropout voltage
VDr = VI - VQ
VDr
–
200
400
mV
IQ = 70 mA 2)
P_5.1.7
Output current limitation
IQ,max
71
100
150
mA
VQ = (VADJ/EN - 0.1 V);
VADJ/EN = 5 V
P_5.1.8
Reverse current
IQ
-4
-2
–
mA
VI = 0 V;
VQ = 32 V;
VADJ/EN = 5 V
P_5.1.9
Reverse current
at negative input voltage
II
-5
-3
–
mA
VI = -16 V;
VQ = 0 V;
VADJ/EN = 5 V
P_5.1.10
–
0.1
0.5
µA
VFB = 5 V
P_5.1.11
151
–
200
°C
Tj increasing due to power
dissipation generated by the
IC 1)
P_5.1.12
Feedback input FB (version GA/EJA only)
Feedback input biasing
current
IFB
Overtemperature protection
Junction temperature
equilibrium
Tj,eq
1) Parameter not subject to production test; specified by design.
2) Measured when the output voltage VQ has dropped 100 mV from its nominal value.
Datasheet
10
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
4.1.2
Typical performance characteristics tracking regulator
Tracking accuracy ∆VQ vs.
junction temperature Tj
Output capacitor series resistor ESRCQ vs.
output current IQ
dVQ-Tj.vsd
ΔVQ
10
[mV]
ESR-IQ_1u.vsd
ESR CQ
[Ω]
0
I Q = 0.1 mA
Stable
Region
1
-1
IQ = 70 mA
-2
0.1
-3
C Q = 1 µF
6 V < VI < 28 V
-40 °C < T j < 150 °C
-4
0.01
-40 -20
0
20
40
60 80 100 120 140
0
15
30
45
I Q [mA]
T j [°C]
Output capacitor series resistor ESRCQ vs.
output current IQ
10
Output voltage VQ vs.
adjust voltage VADJ,EN
VQ-VADJ.vsd
ESR-IQ_470n.vsd
ESR CQ
V Q [V]
1
4
[Ω]
Stable
Region
2
C Q = 470 nF
6 V < VI < 28 V
-40 °C < T j < 150 °C
0
15
30
45
1
1
60
I Q [mA]
Datasheet
VI = 13.5 V
Tj = 25 °C
3
0.1
0.01
60
2
3
4
VADJ [V]
11
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
Output voltage VQ vs.
input voltage VI
Output current limitation IQ,max vs.
input voltage VI, VADJ,EN = 5 V
V Q [V]
4
80
3
60
2
40
1
3
5
Tj = 150 °C
T j = 25 °C
VADJ = 5 V
T j = 25 °C
1
VADJ = 5 V
I Q [mA]
Vdr
5
S OA_5V.V SD
120
VQ-VI.vsd
Tj = -40 °C
20
7
0
10
20
30
Output current limitation IQ,max vs.
input voltage VI, VADJ,EN = 2V
Reverse output current IQ vs.
output voltage VQ
S OA_2V.V SD
120
+1
VADJ = 2 V
I Q [mA]
40
VI [V]
VI [V]
IQ-V Q.vsd
I Q [mA]
0
80
60
-3
T j = -40 °C
VI = 0 V
VADJ = 5 V
-4
20
0
10
20
30
0
40
8
16
24
32
VQ [V]
VI [V]
Datasheet
T j = 150 °C
-2
T j = 25 °C
40
T j = -40 °C
-1
T j = 150 °C
12
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
Dropout voltage VDr vs.
output current IQ
Dropout voltage VDr vs.
junction temperature Tj
Vdr-Tj.vsd
Vdr-IQ_log.vsd
1000
V dr [mV]
V dr [mV]
IQ = 70 mA
350
100
300
250
10
150
100
T j = 25 °C
0.1
1
70
10
-40 -20
0
20
40
60
80 100 120 140
T j [°C]
IQ [mA]
Power supply ripple rejection PSRR vs.
ripple frequency f
Reverse current II vs.
input voltage VI
+1
II-VI.vsd
I I [mA]
PSRR
[dB]
VQ = 0 V
VADJ = 5 V
60
-1
-2
50
T j = -40 °C
30
20
-4
-20
-15
IQ = 5 mA
40
T j = 150 °C
-3
-10
0.01
0
-5
VRIPPLE = 1 V
VIN = 13.5 V
CQ = 10 μF Ceramic
Tj = 25 °C
0.1
1
10
100
1000
f [kHz]
VI [V]
Datasheet
70
13
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
4.2
Current consumption
4.2.1
Electrical characteristics current consumption
Table 7
Electrical characteristics current consumption
VI = 13.5 V; VADJ/EN ≥ 2.0 V; VFB = VQ (version GA/EJA); Tj = -40°C to 150°C; CQ = 1 µF;
all voltages with respect to ground (unless otherwise specified)
Parameter
Symbol
Values
Min.
Typ.
Max.
Unit Note or Test Condition
Number
Quiescent current
stand-by mode
Iq1
–
1
5
µA
VADJ/EN ≤ 0.4 V;
Tj ≤ 125 °C
P_5.2.13
Current consumption
Iq = II - IQ
Iq2
–
50
80
µA
IQ ≤ 100 µA;
VADJ/EN = 5 V
P_5.2.14
–
9
15
mA
IQ ≤ 70 mA;
VADJ/EN = 5 V
P_5.2.15
Datasheet
14
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
4.2.2
Typical performance characteristics current consumption
Quiescent current Iq1 vs.
junction temperature Tj
Current consumption Iq2 vs.
output current IQ
Iq-IQ_log.vsd
Iq1-Tj.vsd
10
I q1 [µA]
VI = 13.5V
I q [mA]
VEN/ADJ = 0.2 V
1
1
T j = 150 °C
T j = -40 °C
0,1
0,04
0.1
-40 -20
0
20
40
60
0.1
80 100 120 140
T j [°C]
1
10
70
I Q [mA]
Current consumption Iq vs.
input voltage VI
Iq _ VI.v s d
VA DJ = 5 V
I Q = 1 mA
T j = 25 °C
1.8
I q [mA]
1.2
0.8
0.4
0
0
10
20
30
40
VI [V]
Datasheet
15
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
4.3
Adjust/enable input
In order to reduce the quiescent current to a minimum, the TLE4254 can be switched to stand-by mode by
setting the adjust/enable input “ADJ/EN” to “low”.
In case the pin “ADJ/EN is left open, an internal pull-down resistors keeps the voltage at the pin low and
therefore ensures that the regulator is switched off.
4.3.1
Table 8
Electrical characteristics adjust/enable
Electrical characteristics adjust/enable
VI = 13.5 V; VADJ/EN ≥ 2.0 V; VFB = VQ (version GA/EJA); Tj = -40°C to 150°C; CQ = 1 µF
all voltages with respect to ground (unless otherwise specified).
Parameter
Symbol
Values
Min.
Typ.
Max.
Unit Note or Test Condition
Number
Adjust/enable
low signal valid
VADJ/EN,low –
–
0.4
V
VQ = 0 V;
IQ ≤ 5 µA @ Tj ≤ 125°C
P_5.3.16
Adjust/enable
high signal valid
(tracking region)
VADJ/EN,high 2
–
–
V
VQ settled
P_5.3.17
Adjust/enable
input current
IADJ/EN
–
2
3
µA
VADJ/EN = 5 V
P_5.3.18
Adjust/enable
input current
if Input tied to GND
IADJ/EN
–
0.3
0.6
mA
VADJ/EN = 5 V;
VI = 0 V
P_5.3.19
1.7
2.5
3.3
MΩ
–
P_5.3.20
Adjust/enable
RADJ/EN
internal pull-down resistor
Datasheet
16
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
4.3.2
Typical performance characteristics adjust/enable input
Adjust/enable input current IADJ/EN vs.
junction temperature Tj
Adjust/enable input current IADJ/EN vs.
input voltage VI
IADJ _ VI.v s d
IADJ-Tj .vsd
IAD J [µA ]
2.5
I ADJ [µA]
VI = 13.5 V
VADJ = 5 V
100
2.4
2.3
10
Tj = 150 °C
2.2
T j = -40 °C
1
2.1
-50
50
0
100
0
150
10
20
30
40
V I [V]
T j [°C]
Startup sequence VQ vs.
adjust/enable input current VADJ/EN
VQ-VADJ.vsd
V Q [V]
VI = 13.5 V
Tj = 25 °C
4
3
2
1
1
2
3
4
VADJ [V]
Datasheet
17
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Functional description
4.4
Status output (version GS/EJS only)
The status output ST indicates an overvoltage or undervoltage situation at the regulator’s output Q.
Therefore, the output voltage VQ is compared to the reference voltage VADJ/EN. Variations of the output voltage
are indicated by a low signal at the status output ST. Transients shorter than the status reaction time tST,r will
not trigger the status output.
The status output ST is an open collector output, requiring a pull-up resistor to a positive voltage rail.
4.4.1
Table 9
Electrical characteristics status output
Electrical characteristics status output ST (version GS/EJS only)
VI = 13.5 V; VADJ/EN ≥ 2.0 V; Tj = -40°C to 150°C; CQ = 1 µF
all voltages with respect to ground (unless otherwise specified).
Parameter
Symbol
Values
Min.
Typ.
Unit Note or Test Condition
Number
Max.
Status switching threshold, VQ,UV
undervoltage
VADJ/EN VADJ/EN VADJ/EN mV
- 120 - 70
- 50
VQ decreasing
P_5.4.21
Status switching threshold, VQ,OV
overvoltage
VADJ/EN VADJ/EN VADJ/EN mV
+ 50
+ 70
+ 120
VQ increasing
P_5.4.22
Status reaction time
tST,r
10
15
30
µs
–
P_5.4.23
Status output
low voltage
VST,low
–
–
0.4
V
IST = 1 mA;
VI ≥ 4 V
P_5.4.24
Status output
sink current limitation
IST,max
1
–
–
mA
IST = 1 mA;
VST = 0.8 V
P_5.4.25
Status output
leakage current
IST,leak
–
0
2
µA
VQ = VADJ/EN
VST = 5 V
P_5.4.26
Datasheet
18
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Application information
5
Application information
Note:
The following information is given as a hint for the implementation of the device only and shall not
be regarded as a description or warranty of a certain functionality, condition or quality of the device.
The application circuits shown are simplified examples. The function must be verified in the real
application.
VBAT
I
micro controller
e.g.
C167,
VDD
XC16X
TC17xx
Main μC supply
e.g.
Q
TLE4271-2
TLE4471
TLE6368...
GND
I/O
VREF
5
EN/
ADJ
Q
1
e.g. off board
supply,
sensors
TLE4254GA
TLE4254EJ A
8
I
FB
4
GND
2, 3, 6, 7
VBAT
I
micro controller
e.g.
C167,
VDD
XC16X
TC17xx
Main μC supply
e.g.
Q
TLE4271-2
TLE4471
TLE6368...
GND
I/O
I/O
VREF
5
EN/
ADJ
ST
4
TLE4254GS
TLE4254EJ S
8
I
Q
1
VQ < VREF
GND
2, 3, 6, 7
Figure 5
Application circuit: output voltage VQ equal to reference voltage VADJ/EN
Figure 5 shows a typical schematic for applications where the tracker output voltage VQ equals the reference
voltage VREF applied to the pin “EN/ADJ”. At version GA/EJA, the pin FB is directly connected to the output “Q”.
The reference voltage is directly applied to “EN/ADJ”.
Datasheet
19
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Application information
VBAT
I
micro controller
e.g.
C167,
VDD
XC16X
TC17xx
Main µC supply
e.g.
Q
TLE4271-2
TLE4471
TLE6368...
GND
I/O
I/O
VREF
R1 ADJ
5
EN/
ADJ
R2 ADJ
ST
4
TLE4254GS
TLE4254EJ S
8
I
Q
1
VQ < VREF
GND
2, 3, 6, 7
Figure 6
Application circuit: output voltage VQ lower than reference voltage VREF
status output feedback to microcontroller (version GS/EJS)
In order to obtain a lower output voltage VQ at the tracker output than the reference voltage VREF, a voltage
divider according to Figure 6 has to be used. The output voltage VQ then calculates:
(5.1)
R2 ADJ
V Q = V REF ⋅ æ ----------------------------------------ö
è R1 ADJ + R2 ADJø
With a given reference voltage VREF, the desired output voltage VQ and the resistor value R1ADJ, the resistor
value for R2ADJ is given by:
(5.2)
VQ
R2 ADJ = R1 ADJ ⋅ æ ---------------------------ö
è V REF – V Qø
Taking into consideration also the effect of the internal EN/ADJ pull-down resistor, the external resistor
divider’s R2ADJ has to be selected to:
(5.3)
R2 ADJ ⋅ R PullDown ,min
R2 ADJ ,select = æ ----------------------------------------------------------ö
è R PullDown ,min – R2 ADJø
Datasheet
20
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Application information
VBAT
I
micro controller
e.g.
C167,
VDD
XC16X
TC17xx
Main µC supply
e.g.
Q
TLE4271-2
TLE4471
TLE6368...
GND
I/O
VREF
5
EN/
ADJ
Q
TLE4254GA
TLE4254EJ A
8
I
FB
GND
VQ > VREF
1
4
R1 FB
R2 FB
2, 3, 6, 7
Figure 7
Application circuit: output voltage VQ higher than reference voltage VREF (version GA/EJA
only)
For output voltages higher than the reference voltage, the voltage divider has to be applied between the
feedback and the output according to Figure 7. The equation for the output voltage with respect to the
reference voltage is given by:
(5.4)
R1 FB + R2 FB
V Q = V REF ⋅ æ ---------------------------------ö
è
ø
R2 FB
Keep in mind that the input voltage has to be at minimum equal to the output voltage plus the dropout voltage
of the regulator.
With a given reference voltage VREF, the desired output voltage VQ and the resistor value R1FB, the resistor value
for R2FB is given by:
(5.5)
V REF
R2 FB = R1 FB ⋅ æ ---------------------------ö
è V Q – V REFø
Datasheet
21
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Package information
1.75 MAX.
0.35 x 45°
1)
0.0
4-0.2
+0.06
0.64±0.25
6±0.2
SEATING
PLANE
2)
+0.10
8° M
AX.
1)
0.0
5-0.2
0.19-0.00
0.175±0.07
Package information
(1.45)
6
0.41-0.06
8
5
1
4
1.27
INDEX
MARKING
1) Does not include plastic or metal protrusion of 0.15 max. per side
2) Lead width can be 0.61 max. in dambar area
All dimensions are in units mm
The drawing is in compliance with ISO 128-30, Projection Method 1 [
Figure 8
]
Outline PG-DSO-8
B
e
L
A
HLG05506
Figure 9
Footprint PG-DSO-8
Reflowing soldering dimensions:
e = 1.27
A = 5.69
L = 1.31
B = 0.65
Datasheet
22
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
0.64±0.25
Seating Plane
D
0.08 C
Coplanarity
1.27
6±0.2
A
0.2
D 8x
Bottom View
5
5
8
4
4
1
2.65±0.2
8
0.1 C D 2x
0.35x45°
8° MAX.
2x
1.7 Max.
0.1 C A-B
1)
3.9±0.1
0.19+0.06
(1.45)
1)
4.9±0.1
0..0.1
Stand Off
Package information
1
B
Index
Marking
0.41±0.09
3±0.2
2)
0.2
C A-B D 8x
1) Does not include plastic or metal protrusion of 0.15max. per side
2) Dambar protrusion shall be maximum 0.1mm total in excess of lead width
All dimensions are in units mm
The drawing is in compliance with ISO 128-30, Projection Method 1 [
Figure 10
]
Outline PG-DSO-8 exposed pad
1.31
0.65
3
1.27
2.65
5.69
PG-DSO-8-27-FP V01
Figure 11
Footprint PG-DSO-8 exposed pad
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products and to be compliant
with government regulations the device is available as a green product. Green products are RoHS-Compliant
(i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020).
Further information on packages
https://www.infineon.com/packages
Datasheet
23
Rev. 1.3
2021-06-15
OPTIREG™ linear TLE4254
High accuracy low dropout voltage tracking regulator
Revision history
7
Revision history
Revision
Date
Changes
1.3
2021-06-15
Updated layout and structure.
Page 13: added PSRR graph.
Editorial changes.
1.2
2009-11-18
Updated Version, product versions TLE4254EJA and TLE4254EJS in
PG-DSO-8 exposed pad and all related description added.
1.1
2008-07-16
Typing errors corrected.
1.0
2006-11-22
Package outlines drawing updated.
Datasheet
24
Rev. 1.3
2021-06-15
Trademarks
All referenced product or service names and trademarks are the property of their respective owners.
Edition 2021-06-15
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2021 Infineon Technologies AG.
All Rights Reserved.
Do you have a question about any
aspect of this document?
Email: erratum@infineon.com
Document reference
Z8F55248542
IMPORTANT NOTICE
The information given in this document shall in no
event be regarded as a guarantee of conditions or
characteristics ("Beschaffenheitsgarantie").
With respect to any examples, hints or any typical
values stated herein and/or any information regarding
the application of the product, Infineon Technologies
hereby disclaims any and all warranties and liabilities
of any kind, including without limitation warranties of
non-infringement of intellectual property rights of any
third party.
In addition, any information given in this document is
subject to customer's compliance with its obligations
stated in this document and any applicable legal
requirements, norms and standards concerning
customer's products and any use of the product of
Infineon Technologies in customer's applications.
The data contained in this document is exclusively
intended for technically trained staff. It is the
responsibility of customer's technical departments to
evaluate the suitability of the product for the intended
application and the completeness of the product
information given in this document with respect to
such application.
For further information on technology, delivery terms
and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
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