TLF80511TF V50 [INFINEON]

TLF80511TF V50 是一款线性低压差稳压器,适用于具有固定输出电压(5V),负载电流高达 400 mA 的 D²PAK、DPAK 和 DSO8-EP 封装。高达 40V 的输入电压调节为 V Q,nom 为 5V,精度为±2%。TLF80511TF V50 的典型静态电流为38μA,对于需要极低工作电流的系统来说,它就是理想的解决方案,例如永久连接电池的系统。当输出电流小于 100mA 时,它具有 100mV 的极低压差。此外,压差区域始于输入电压为 3.3 V 时(扩展操作范围)。因此,TLF80511TF V50 适用于汽车系统。此外,TLF80511TF V50 的新型快速调节理念仅需一个 1μF 的输出电容即可保持电压稳定。;
TLF80511TF V50
型号: TLF80511TF V50
厂家: Infineon    Infineon
描述:

TLF80511TF V50 是一款线性低压差稳压器,适用于具有固定输出电压(5V),负载电流高达 400 mA 的 D²PAK、DPAK 和 DSO8-EP 封装。高达 40V 的输入电压调节为 V Q,nom 为 5V,精度为±2%。TLF80511TF V50 的典型静态电流为38μA,对于需要极低工作电流的系统来说,它就是理想的解决方案,例如永久连接电池的系统。当输出电流小于 100mA 时,它具有 100mV 的极低压差。此外,压差区域始于输入电压为 3.3 V 时(扩展操作范围)。因此,TLF80511TF V50 适用于汽车系统。此外,TLF80511TF V50 的新型快速调节理念仅需一个 1μF 的输出电容即可保持电压稳定。

电池 稳压器
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TLF80511TF  
Low Dropout Linear Fixed Voltage Regulator  
TLF80511TFV50  
TLF80511TFV33  
Data Sheet  
Rev. 1.0, 2014-01-28  
Automotive Power  
TLF80511TF  
Table of Contents  
1
2
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
3
3.1  
3.2  
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Pin Assignment PG-TO252-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Pin Definitions and Functions PG-TO252-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
4
General Product Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Functional Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
4.1  
4.2  
4.3  
5
Block Description and Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Voltage Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Typical Performance Characteristics Voltage Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Current Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Typical Performance Characteristics Current Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
5.1  
5.2  
5.3  
5.4  
6
Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Application Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Selection of External Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Input Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Output Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Thermal Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Reverse Polarity Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Further Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
6.1  
6.2  
6.2.1  
6.2.2  
6.3  
6.4  
6.5  
7
8
Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Data Sheet  
2
Rev. 1.0, 2014-01-28  
Low Dropout Linear Fixed Voltage Regulator  
TLF80511TF  
1
Overview  
Features  
Output Voltage 5 V and 3.3 V  
Output Voltage Precision ±2 %  
Output Current up to 400 mA  
Ultra Low Current Consumption 38 µA  
Very Low Dropout Voltage: 100 mV at 100 mA Output Current  
Extended Operating Range Starting at 3.3 V  
Small Output Capacitor 1 µF  
Output Current Limitation  
Overtemperature Shutdown  
Suitable for Use in Automotive Electronics  
Wide Temperature Range from -40 °C up to 150 °C  
Green Product (RoHS compliant)  
AEC Qualified  
PG-TO252-3  
Description  
The TLF80511TF is a linear low dropout voltage regulator for load currents up to 400 mA. An input voltage of up  
to 40 V is regulated to VQ,nom = 5 V (TLF80511TFV50) or VQ,nom = 3.3 V (TLF80511TFV33) with ±2 % precision.  
The TLF80511TF with a typical quiescent current of 38 µA, is the ideal solution for systems requiring very low  
operating currents, such as those permanently connected to a battery.  
It features a very low dropout voltage of 100 mV, when the output current is less than 100 mA. In addition, the  
dropout region begins at input voltages of 3.3 V (extended operating range). This makes the TLF80511TF suitable  
to supply automotive systems.  
In addition, the TLF80511’s new fast regulation concept requires only a single, 1 µF output capacitor to maintain  
stable regulation.  
The device is designed for the harsh environment of automotive applications. Therefore standard features like  
output current limitation and overtemperature shutdown are implemented and protect the device against failures  
like output short circuit to GND, over-current and over-temperatures. The TLF80511TF can be also used in all  
other applications requiring a stabilized 5 V or 3.3 V supply voltage.  
Type  
Package  
Marking  
80511V5  
80511V3  
TLF80511TFV50  
TLF80511TFV33  
PG-TO252-3  
PG-TO252-3  
Data Sheet  
3
Rev. 1.0, 2014-01-28  
TLF80511TF  
Block Diagram  
2
Block Diagram  
I
Q
Current  
Limitation  
Bandgap  
Reference  
Temperature  
Shutdown  
GND  
Figure 1  
Block Diagram  
Data Sheet  
4
Rev. 1.0, 2014-01-28  
TLF80511TF  
Pin Configuration  
3
Pin Configuration  
3.1  
Pin Assignment PG-TO252-3  
GND  
2
GND  
1
3
I
Q
Figure 2  
Pin Configuration  
3.2  
Pin Definitions and Functions PG-TO252-3  
Pin  
Symbol  
Function  
Input  
1
I
for compensating line influences, a capacitor to GND close to the IC terminals is  
recommended  
2
3
GND  
Q
Ground  
Output  
block to GND with a capacitor close to the IC terminals, respecting the values given  
for its capacitance CQ and ESR in the table “Functional Range” on Page 7  
Tab  
GND  
Heat Slug  
connect to heatsink area;  
connect with GND on PCB  
Data Sheet  
5
Rev. 1.0, 2014-01-28  
TLF80511TF  
General Product Characteristics  
4
General Product Characteristics  
4.1  
Absolute Maximum Ratings  
Table 1  
Absolute Maximum Ratings 1)  
Tj = -40 °C to +150 °C; all voltages with respect to ground, positive current flowing into pin  
(unless otherwise specified)  
Parameter  
Symbol  
Values  
Typ.  
Unit Note /  
Test Condition  
Number  
Min.  
-0.3  
-0.3  
Max.  
45  
Input I  
Voltage  
VI  
V
V
P_4.1.1  
P_4.1.2  
Output Q  
Voltage  
VQ  
7
Temperature  
Junction Temperature  
Storage Temperature  
ESD Susceptibility  
ESD Susceptibility  
ESD Susceptibility  
Tj  
-40  
-55  
150  
150  
°C  
°C  
P_4.1.3  
P_4.1.4  
Tstg  
VESD  
VESD  
-4  
4
kV  
kV  
HBM2)  
CDM3)  
P_4.1.5  
P_4.1.6  
-1.5  
1.5  
1) Not subject to production test, specified by design.  
2) ESD susceptibility, HBM according to ANSI/ESDA/JEDEC JS001 (1.5k , 100 pF)  
3) ESD susceptibility, Charged Device Model “CDM” according JEDEC JESD22-C101  
Note: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.  
Note:Integrated protection functions are designed to prevent IC destruction under fault conditions described in the  
data sheet. Fault conditions are considered as “outside” normal operating range. Protection functions are  
not designed for continuous repetitive operation.  
Data Sheet  
6
Rev. 1.0, 2014-01-28  
TLF80511TF  
General Product Characteristics  
4.2  
Functional Range  
Table 2  
Functional Range  
Parameter  
Symbol  
Values  
Typ. Max.  
Unit  
Note /  
Test Condition  
Number  
Min.  
Input Voltage Range for Normal  
Operation  
VI  
V
Q,nom + Vdr  
40  
V
P_4.2.1  
Extended Input Voltage Range  
VI,ext  
3.3  
1
40  
V
Tj > 25 °C1)  
P_4.2.2  
P_4.2.3  
2)  
Output Capacitor’s Requirements CQ  
µF  
for Stability  
3)  
Output Capacitor’s Requirements ESR(CQ)  
for Stability  
5
P_4.2.4  
P_4.2.5  
Junction Temperature  
Tj  
-40  
150  
°C  
1) Between min. value and VQ,nom + Vdr: VQ = VI - Vdr. Below min. value: VQ = 0 V  
2) the minimum output capacitance requirement is applicable for a worst case capacitance tolerance of 30%  
3) relevant ESR value at f = 10 kHz  
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.  
4.3  
Thermal Resistance  
Note:This thermal data was generated in accordance with JEDEC JESD51 standards. For more information, go  
to www.jedec.org.  
Table 3  
Thermal Resistance  
Parameter  
Symbol  
Values  
Typ.  
Unit  
Note /  
Test Condition  
Number  
Min.  
Max.  
Package Version PG-TO252-3  
Junction to Case1)  
RthJC  
RthJA  
RthJA  
RthJA  
4
K/W  
K/W  
K/W  
K/W  
2)  
P_4.3.1  
P_4.3.2  
P_4.3.3  
Junction to Ambient  
27  
95  
52  
Junction to Ambient  
footprint only3)  
300 mm2 heatsink P_4.3.4  
area on PCB3)  
Junction to Ambient  
Junction to Ambient  
RthJA  
39  
K/W  
600 mm2 heatsink P_4.3.5  
area on PCB3)  
1) Not subject to production test, specified by design  
2) 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 x 114.3 x 1.5 mm³ board with 2 inner copper layers (2 x 70µm Cu, 2 x 35µm Cu).  
Where applicable a thermal via array under the exposed pad contacted the first inner copper layer.  
3) Specified RthJA value is according to JEDEC JESD 51-3 at natural convection on FR4 1s0p board; The Product  
(Chip+Package) was simulated on a 76.2 × 114.3 × 1.5 mm3 board with 1 copper layer (1 x 70µm Cu).  
Data Sheet  
7
Rev. 1.0, 2014-01-28  
TLF80511TF  
Block Description and Electrical Characteristics  
5
Block Description and Electrical Characteristics  
5.1  
Voltage Regulation  
The output voltage VQ is divided by a resistor network. This fractional voltage is compared to an internal voltage  
reference and drives the pass transistor accordingly.  
The control loop stability depends on the output capacitor CQ, the load current, the chip temperature and the  
internal circuit design. To ensure stable operation, the output capacitor’s capacitance and its equivalent series  
resistor ESR requirements given in Table 2 “Functional Range” on Page 7 must be maintained. For details see  
the typical performance graph “Stability Region: Equivalent Serial Resistor ESR versus Output Current IQ”  
on Page 11. Since the output capacitor is used to buffer load steps, it should be sized according to the  
application’s needs.  
An input capacitor CI is not required for stability, but is recommended to compensate line fluctuations. An  
additional reverse polarity protection diode and a combination of several capacitors for filtering should be used.  
Connect the capacitors close to the regulator terminals.  
Whenever the load current exceeds the specified limit, e.g. in case of a short circuit, the output current is limited  
and the output voltage decreases.  
The overtemperature shutdown circuit prevents the IC from immediate destruction under fault conditions (e.g.  
output continuously short-circuited) by switching off the power stage. After the chip has cooled, the regulator  
restarts. This oscillatory thermal behaviour causes the junction temperature to exceed the 150° C maximum and  
significantly reducing the IC’s life.  
Regulated  
Output Voltage  
Supply  
IQ  
II  
I
Q
Current  
Limitation  
C
LOAD  
Bandgap  
Reference  
CI  
VI  
VQ  
ESR  
CQ  
Temperature  
Shutdown  
GND  
ApplicationDiagram.vsd  
Figure 3  
Block Diagram Voltage Regulation  
Data Sheet  
8
Rev. 1.0, 2014-01-28  
TLF80511TF  
Block Description and Electrical Characteristics  
Table 4  
Electrical Characteristics Voltage Regulator 5 V and 3.3 V version  
VI = 13.5 V; Tj = -40 °C to +150 °C; all voltages with respect to ground, positive current flowing into pin  
(unless otherwise specified)  
Parameter  
Symbol  
Values  
Unit Note / Test Condition Number  
Min. Typ. Max.  
Output Voltage Precision  
TLF80511TFV50  
VQ  
4.9  
5.0  
5.1  
V
V
V
V
0.05 mA < IQ < 400 mA P_5.1.1  
6 V < VI < 28 V  
Output Voltage Precision  
TLF80511TFV50  
VQ  
4.9  
5.0  
5.1  
0.05 mA < IQ < 200 mA P_5.1.2  
5.5 V < VI < 40 V  
Output Voltage Precision  
TLF80511TFV33  
VQ  
3.23 3.3  
3.23 3.3  
3.37  
3.37  
0.05 mA < IQ < 400 mA P_5.1.3  
4.4 V < VI < 28 V  
Output Voltage Precision  
TLF80511TFV33  
VQ  
0.05 mA < IQ < 200 mA P_5.1.4  
3.9 V < VI < 40 V  
Output Current Limitation  
IQ,max  
401  
600  
20  
900  
50  
mA  
mV  
0 V < VQ < 4.8 V  
P_5.1.5  
Load Regulation  
steady-state  
|VQ,load| –  
IQ = 0.05 mA to 400 mA P_5.1.6  
VI = 6 V  
Line Regulation  
steady-state  
Dropout Voltage1)  
Vdr = VI - VQ  
TLF80511TFV50  
|VQ,line|  
Vdr  
10  
30  
mV  
mV  
VI = 8 V to 32 V  
IQ = 5 mA  
P_5.1.7  
250  
500  
IQ = 250 mA  
IQ = 100 mA  
IQ = 250 mA  
IQ = 100 mA  
P_5.1.8  
Dropout Voltage  
Vdr = VI - VQ  
TLF80511TFV50  
Vdr  
Vdr  
Vdr  
100  
320  
130  
mV  
mV  
mV  
P_5.1.9  
Dropout Voltage  
Vdr = VI - VQ  
TLF80511TFV33  
650  
P_5.1.10  
P_5.1.11  
Dropout Voltage  
Vdr = VI - VQ  
TLF80511TFV33  
Power Supply Ripple Rejection2) PSRR  
TLF80511TFV50  
55  
dB  
°C  
K
f
ripple = 100 Hz  
P_5.1.12  
P_5.1.13  
P_5.1.14  
Vripple = 0.5 Vpp  
Overtemperature Shutdown  
Threshold  
Tj,sd  
151  
175  
15  
200  
Tj increasing2)  
Tj decreasing2)  
Overtemperature Shutdown  
Threshold Hysteresis  
Tj,sdh  
1) Measured when the output voltage VQ has dropped 100 mV from the nominal value obtained at VI = 13.5V  
2) Not subject to production test, specified by design  
Data Sheet  
9
Rev. 1.0, 2014-01-28  
TLF80511TF  
Block Description and Electrical Characteristics  
5.2  
Typical Performance Characteristics Voltage Regulator  
Typical Performance Characteristics  
Output Voltage VQ versus  
Dropout Voltage Vdr versus  
Junction Temperature Tj (TLF80511TFV50)  
Junction Temperature Tj (TLF80511TFV50)  
5,20  
400  
VI = 13.5 V  
IQ = 200 mA  
5,15  
5,10  
5,05  
5,00  
4,95  
4,90  
4,85  
4,80  
350  
I
Q = 250 mA  
300  
250  
200  
150  
100  
50  
I
Q = 100 mA  
I
Q = 10 mA  
80  
0
-40  
0
40  
80  
120  
160  
-40  
0
40  
120  
160  
T
j [°C]  
T
j [°C]  
Dropout Voltage Vdr versus  
Output Current IQ (TLF80511TFV50)  
Maximum Output Current IQ versus  
Input Voltage VI (TLF80511TFV50)  
600  
700  
VQ= 4.8 V  
600  
500  
400  
300  
200  
100  
0
500  
T
j = 125 °C  
Tj = 150 °C  
Tj = 25 °C  
Tj = -40 °C  
400  
300  
200  
100  
0
T
j = 25 °C  
0
10  
20  
30  
40  
0
100  
200  
300  
400  
IQ [mA]  
V
I [V]  
Data Sheet  
10  
Rev. 1.0, 2014-01-28  
TLF80511TF  
Block Description and Electrical Characteristics  
Load Regulation ΔVQ,load versus  
Output Current Change ΔIQ  
Line Regulation ΔVQ,line versus  
Input Voltage VI  
2
8
IQ = 5 mA  
VI = 13.5 V  
Tj = 25 °C  
6
0
-2  
Tj = -40 °C  
Tj = 150 °C  
4
2
0
Tj = 25 °C  
-4  
-6  
Tj = -40 °C  
Δ
Δ
-2  
-8  
-4  
-6  
-8  
-10  
-12  
0
100  
200  
300  
400  
0
10  
20  
30  
40  
ΔIQ [mA]  
ΔVI [V]  
Power Supply Ripple Rejection versus  
Frequency (TLF80511TFV50)  
Stability Region: Equivalent Serial Resistor ESR  
versus Output Current IQ  
100  
70  
C
Q = 1 µF  
I
C
Q = 10 mA  
Q = 1 µF  
VI = 6..28 V  
60  
50  
40  
30  
20  
10  
0
V
I = 13.5 V  
Vripple = 0.5 Vpp  
Unstable  
Region  
Tj = 25 °C  
10  
1
Stable  
Region  
0,1  
0,01  
0
100  
200  
300  
400  
0,01  
0,1  
1
10  
100  
1000  
f
[kHz]  
IQ [mA]  
Data Sheet  
11  
Rev. 1.0, 2014-01-28  
TLF80511TF  
Block Description and Electrical Characteristics  
Output Voltage VQ versus  
Input Voltage VI (TLF80511TFV50)  
6
I
Q = 100 mA  
Tj = 25°C  
5
4
3
2
1
0
0
2
4
6
V
I [V]  
Data Sheet  
12  
Rev. 1.0, 2014-01-28  
TLF80511TF  
Block Description and Electrical Characteristics  
5.3  
Current Consumption  
Table 5  
Electrical Characteristics Current Consumption  
VI = 13.5 V; Tj = -40 °C to +150 °C; all voltages with respect to ground, positive current flowing into pin  
(unless otherwise specified)  
Parameter  
Symbol  
Values  
Typ.  
38  
Unit  
Note / Test Condition Number  
Min.  
Max.  
Current Consumption  
Iq = II - IQ  
Iq  
Iq  
Iq  
46  
µA  
µA  
µA  
IQ = 0.05 mA  
Tj < 25 °C  
P_5.3.1  
P_5.3.2  
P_5.3.3  
Current Consumption  
Iq = II - IQ  
75  
80  
IQ = 0.05 mA  
Tj < 125 °C  
Current Consumption  
Iq = II - IQ  
67  
IQ = 400 mA  
Tj < 125 °C1)  
1) Not subject to production test, specified by design.  
Data Sheet  
13  
Rev. 1.0, 2014-01-28  
TLF80511TF  
Block Description and Electrical Characteristics  
5.4  
Typical Performance Characteristics Current Consumption  
Typical Performance Characteristics  
Current Consumption Iq versus  
Output Current IQ  
Current Consumption Iq versus  
Input Voltage VI  
100  
VI = 13.5 V  
RLOAD = 100 Ω  
Tj = 25 °C  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
58  
52  
46  
40  
34  
28  
22  
T
j = 150 °C  
Tj = 25 °C  
T
j = -40 °C  
0
10  
20  
30  
40  
0
100  
200  
300  
400  
V
I [V]  
IQ [mA]  
Data Sheet  
14  
Rev. 1.0, 2014-01-28  
TLF80511TF  
Application Information  
6
Application Information  
6.1  
Application Diagram  
Supply  
Regulated Output Voltage  
I
Q
Load  
e. g.  
DI1  
Micro  
Controller  
Current  
Limitation  
XC22xx  
CQ  
DI2  
CI2  
CI1  
1µF  
(ESR<5)  
100nF  
<45V  
10µF  
Bandgap  
Reference  
GND  
Temperature  
Shutdown  
GND  
Figure 4  
Application Diagram  
6.2  
Selection of External Components  
6.2.1  
Input Pin  
The typical input circuitry for a linear voltage regulator is shown in the application diagram above.  
A ceramic capacitor at the input, in the range of 100nF to 470nF, is recommended to filter out the high frequency  
disturbances imposed by the line e.g. ISO pulses 3a/b. This capacitor must be placed very close to the input pin  
of the linear voltage regulator on the PCB.  
An aluminum electrolytic capacitor in the range of 10µF to 470µF is recommended as an input buffer to smooth  
out high energy pulses, such as ISO pulse 2a. This capacitor should be placed close to the input pin of the linear  
voltage regulator on the PCB.  
An overvoltage suppressor diode can be used to further suppress any high voltage beyond the maximum rating  
of the linear voltage regulator and protect the device against any damage due to over-voltage above 45 V.  
The external components at the input are not mandatory for the operation of the voltage regulator, but they are  
recommended in order to protect the voltage regulator against external disturbances and damages.  
6.2.2  
Output Pin  
An output capacitor is mandatory for the stability of linear voltage regulators.  
The requirement to the output capacitor is given in “Functional Range” on Page 7. The graph “Stability Region:  
Equivalent Serial Resistor ESR versus Output Current IQ” on Page 11 shows the stable operation range of  
the device.  
TLF80511TF is designed to be stable with extremely low ESR capacitors. According to the automotive  
requirements, ceramic capacitors with X5R or X7R dielectrics are recommended.  
The output capacitor should be placed as close as possible to the regulator’s output and GND pins and on the  
same side of the PCB as the regulator itself.  
Data Sheet  
15  
Rev. 1.0, 2014-01-28  
TLF80511TF  
Application Information  
In case of rapid transients of input voltage or load current, the capacitance should be dimensioned in accordance  
and verified in the real application that the output stability requirements are fulfilled.  
6.3  
Thermal Considerations  
Knowing the input voltage, the output voltage and the load profile of the application, the total power dissipation  
can be calculated:  
PD = (VI - VQ) × IQ + VI × Iq  
(1)  
with  
PD: continuous power dissipation  
VI : input voltage  
VQ: output voltage  
IQ: output current  
Iq: quiescent current  
The maximum acceptable thermal resistance RthJA can then be calculated:  
RthJA,max = ( Tj,max - Ta ) / PD  
(2)  
with  
T
j,max: maximum allowed junction temperature  
Ta: ambient temperature  
Based on the above calculation the proper PCB type and the necessary heat sink area can be determined with  
reference to the specification in “Thermal Resistance” on Page 7.  
Example  
Application conditions:  
VI = 13.5V  
VQ = 5V  
IQ = 150mA  
Ta = 85°C  
Calculation of RthJA,max  
:
PD = (VI VQ) × IQ + VI × Iq  
= (13.5V – 5V) × 150mA  
= 1.275W  
(VI × Iq can be neglected because of very low Iq)  
RthJA,max = (Tj,max Ta) / PD  
= (150°C – 85°C) / 1.275W = 50.98K/W  
As a result, the PCB design must ensure a thermal resistance RthJA lower than 50.98 K/W. According to “Thermal  
Resistance” on Page 7, at least 600 mm2 heatsink area is needed on the FR4 1s0p PCB, or the FR4 2s2p board  
can be used.  
Data Sheet  
16  
Rev. 1.0, 2014-01-28  
TLF80511TF  
Application Information  
6.4  
Reverse Polarity Protection  
TLF80511TF is not self protected against reverse polarity faults and must be protected by external components  
against negative supply voltage. An external reverse polarity diode is needed. The absolute maximum ratings of  
the device as specified in “Absolute Maximum Ratings” on Page 6 must be kept.  
6.5  
Further Application Information  
For further information you may contact http://www.infineon.com/  
Data Sheet  
17  
Rev. 1.0, 2014-01-28  
TLF80511TF  
Package Outlines  
7
Package Outlines  
+0.15  
6.5  
5.4  
-0.05  
+0.05  
-0.10  
A
2.3  
±0.1  
+0.08  
B
(5)  
0.5  
-0.04  
+0.20  
-0.01  
0.9  
0...0.15  
0.15 MAX.  
per side  
3x  
0.75  
+0.08  
-0.04  
0.5  
±0.1  
2.28  
0.1 B  
4.57  
M
0.25  
A B  
All metal surfaces tin plated,  
except area of cut.  
GPT09277  
Figure 5  
PG-TO252-3  
Data Sheet  
18  
Rev. 1.0, 2014-01-28  
TLF80511TF  
Revision History  
8
Revision History  
Revision  
Date  
Changes  
1.0  
2014-01-28  
Data Sheet - Initial version  
Data Sheet  
19  
Rev. 1.0, 2014-01-28  
Edition 2014-01-28  
Published by  
Infineon Technologies AG  
81726 Munich, Germany  
© 2014 Infineon Technologies AG  
All Rights Reserved.  
Legal Disclaimer  
The information given in this document shall in no event be regarded as a guarantee of conditions or  
characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any  
information regarding the application of the device, 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.  
Information  
For further information on technology, delivery terms and conditions and prices, please contact the nearest  
Infineon Technologies Office (www.infineon.com).  
Warnings  
Due to technical requirements, components may contain dangerous substances. For information on the types in  
question, please contact the nearest Infineon Technologies Office.  
Infineon Technologies components may be used in life-support devices or systems only with the express written  
approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure  
of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support  
devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain  
and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may  
be endangered.  

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